160 results on '"Yingzhou Huang"'
Search Results
2. Realizing self-powered mechanical transmission control system via triboelectric nanogenerator and electrorheological fluid composed soft starter
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Jianfeng Sun, Jiaqi Li, Yingzhou Huang, Song Qi, Jie Chen, Changsheng Wu, and Hengyu Guo
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triboelectric nanogenerator ,electrorheological fluid ,soft starter ,self-powered ,Chemistry ,QD1-999 ,Physics ,QC1-999 - Abstract
Soft starters are effective devices used to provide overload protection for motors from large mechanical shocks during the start-up period. However, existing soft starters require additional power supplies, sensors, and complex control elements that pose serious challenges to the integration, versatility, and operability of mechanical transmission system. Herein, we propose a newly soft starter based on the triboelectric nanogenerator (TENG) and electrorheological fluid (ERF) to realize a self-powered mechanical transmission system. Both ERF’s rheological characteristic and the baffle structure play a role in the torque of device. Driven by TENG, the soft starter with optimized baffle achieves a 715% growth in transmission torque compared to that of the device without baffle. And a smooth start is obtained with transmission speeds ranging from 0% to 100%. In application demonstration, this triboelectric soft starter (TSS) has the capacity to gain a smooth operation of the high-speed motor. In contrast, the direct start generates an overshoot, leading to a break in the conveyor belt. The TSS designed in this work with the advantages of self-powered, highly integrated, easy to operate, and low cost, provides a prospective strategy for broadening the application of TENG in mechanical transmission systems.
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- 2023
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3. Mxenes–Au NP Hybrid Plasmonic 2D Microplates in Microfluidics for SERS Detection
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Zhaoxian Chen, Anping Liu, Xiumei Zhang, Jiawei Jiao, Yuan Yuan, Yingzhou Huang, and Sheng Yan
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SERS ,Mxenes–Au NPs ,hybrid plasmonic 2D microplates ,microfluidics ,Biotechnology ,TP248.13-248.65 - Abstract
Combined with microfluidics, surface-enhanced Raman spectroscopy (SERS) exhibits huge application prospective in sensitive online detection. In current studies, the design and optimization of plasmonic enhanced structures in microfluidics for SERS detection could be an interesting challenge. In this work, hybrid plasmonic 2D microplates composed of Mxenes (Ti3C2Tx) microplates and in-situ synthesized Au nanoparticles (Au NPs) are fabricated in a microchannel for enhanced structures in SERS microfluidics. Benefiting from the 2D Mxenes microplates with complex distributions, the enhanced areas generated by Au NPs are quite enlarged in a microchannel, which exhibits high sensitivity in SERS detection at 10−10 M for Nile blue (NB) molecules in microfluidics. The mechanism of electromagnetic enhancement (EM) and chemical enhancement (CM) is analyzed. The experimental data indicate the ultrasonic times of Mxenes and the concentration of Au3+ play important roles in the sensitivity of SERS detection, which is confirmed by the simulated electric field distributions. Furthermore, a typical pesticide (thiram) at 100 ppm in water is detected on these SERS microfluidics with hybrid plasmonic enhanced structures, which demonstrates that our work not only strengthens the knowledge of plasmonics but also enlarges the application of SERS.
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- 2022
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4. Electrospinning Fabricating Au/TiO2 Network-like Nanofibers as Visible Light Activated Photocatalyst
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Zhuojun Duan, Yingzhou Huang, Dingke Zhang, and Shijian Chen
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Medicine ,Science - Abstract
Abstract Exploiting photocatalysts with characteristics of low cost, high reactivity and easy recovery offer great potentials for complete elimination of toxic chemicals and environmental remediation. In this work, Au/TiO2 network-like nanofibers were fabricated using a facile electrospinning technique followed by calcinations in air. Photocatalytic tests indicate that the Au/TiO2 network-like nanofibers possess an excellent photodegradation rate of rhodamine B (RB) under UV, visible and natural light radiation. The enhanced photocatalytic activity can be attributed to the plasmonic resonance absorption of Au nanoparticles, and photogenerated electrons and holes are effectively separated by the Au/TiO2 heterojunction structures. Furthermore, the three-dimensional network structure can provide a large number of active sites for RB degradation.
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- 2019
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5. A Simple Laser Ablation-Assisted Method for Fabrication of Superhydrophobic SERS Substrate on Teflon Film
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Fangjia Chu, Sheng Yan, Jiangen Zheng, Lingjun Zhang, Haiyan Zhang, Keke Yu, Xiaonan Sun, Anping Liu, and Yingzhou Huang
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Surface-enhanced Raman scattering ,Teflon ,Laser-treatment ,Superhydrophobic ,Materials of engineering and construction. Mechanics of materials ,TA401-492 - Abstract
Abstract With high sensitivity at single molecule level, surface-enhanced Raman scattering (SERS) is considered as an ultrasensitive optical detection technology with broad application prospects in lots of fields. However, the complicated fabrication and unaffordable price of SERS substrate are still a roadblock on the way to be widely used in industry. In this work, the SERS spectra on a commercial laser engraved Teflon (PTFE) film with engraved microarray are investigated. The wettability of film surface modulated by laser engraving make the microarray have the ability to decrease the contact area on film surface while water evaporation. The SEM image of the engraved area points out the micro/nanostructures generated engraving process is crucial to its superhydrophobic property. The probing molecules (i.e., methylene blue and rhodamine6G) were utilized to investigate with the limit of detection (1 × 10−14 M). Furthermore, the biomolecule (bovine serum albumin) was used to demonstrate its benefits in biological applications. The measured intensities of Raman spectra on this PTFE with laser engraved microarray demonstrate its potential value for a SERS substrate. Our work on this simple, cheap SERS substrate with high sensitivity has a great commercial value and plenty of application in lots of fields.
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- 2018
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6. Electromagnetic Energy Redistribution in Coupled Chiral Particle Chain-Film System
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Yuxia Tang, Yingzhou Huang, Linhong Qv, and Yurui Fang
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Chiral plasmonic nanostructures ,Electromagnetic energy focusing ,Chiral near-field enhancement ,Chiral focusing ,Materials of engineering and construction. Mechanics of materials ,TA401-492 - Abstract
Abstract Metal nanoparticle-film system has been proved that it has the ability of focusing light in the gap between particle and film, which is useful for surface-enhanced Raman scattering and plasmon catalysis. The rapid developed plasmonic chirality can also be realized in such system. Here, we investigated an electromagnetic energy focusing effect and chiral near-field enhancement in a coupled chiral particle chain on gold film. It shows large electric field enhancement in the gap between particle and film, as well as chiral near field. The enhancement properties at resonant peaks for the system excited by left circularly polarized light and right circularly polarized light are obviously different. This difference resulted from the interaction of circularly polarized light and the chiral particle-film system is analyzed with plasmon hybridization. The enhanced optical activity can provide promising applications for the enhancement of chiral molecule sensor for this chiral particle chain-film system.
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- 2018
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7. Electromagnetic Field Redistribution in Metal Nanoparticle on Graphene
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Keke Li, Anping Liu, Dapeng Wei, Keke Yu, Xiaonan Sun, Sheng Yan, and Yingzhou Huang
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EM redistribution ,Graphene plasmons ,Nanoparticle/graphene hybrid system ,SERS ,Materials of engineering and construction. Mechanics of materials ,TA401-492 - Abstract
Abstract Benefiting from the induced image charge on metal film, the light energy is confined on a film surface under metal nanoparticle dimer, which is called electromagnetic field redistribution. In this work, electromagnetic field distribution of metal nanoparticle monomer or dimer on graphene is investigated through finite-difference time-domain method. The results point out that the electromagnetic field (EM) redistribution occurs in this nanoparticle/graphene hybrid system at infrared region where light energy could also be confined on a monolayer graphene surface. Surface charge distribution was analyzed using finite element analysis, and surface-enhanced Raman spectrum (SERS) was utilized to verify this phenomenon. Furthermore, the data about dielectric nanoparticle on monolayer graphene demonstrate this EM redistribution is attributed to strong coupling between light-excited surface charge on monolayer graphene and graphene plasmon-induced image charge on dielectric nanoparticle surface. Our work extends the knowledge of monolayer graphene plasmon, which has a wide range of applications in monolayer graphene-related film.
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- 2018
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8. Direct observation of valley-polarized topological edge states in designer surface plasmon crystals
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Xiaoxiao Wu, Yan Meng, Jingxuan Tian, Yingzhou Huang, Hong Xiang, Dezhuan Han, and Weijia Wen
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Science - Abstract
The photonic valley-Hall effect can enable the unidirectional propagation of edge states, but often require covers which shield the states from direct measurement. Here, Wu et al. realize photonic valley-Hall effect using designer surface plasmons, enabling the direct observation of topological states.
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- 2017
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9. Team Text Understanding and Analysis at PAN: Utilizing BERT Series Pre-training Model for Multi-Author Writing Style Analysis.
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Yingzhou Huang and Leilei Kong
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- 2024
10. Relaxation of liquid bridge after droplets coalescence
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Jiangen Zheng, Haiyang Shi, Guo Chen, Yingzhou Huang, Hua Wei, Shuxia Wang, and Weijia Wen
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Physics ,QC1-999 - Abstract
We investigate the relaxation of liquid bridge after the coalescence of two sessile droplets resting on an organic glass substrate both experimentally and theoretically. The liquid bridge is found to relax to its equilibrium shape via two distinct approaches: damped oscillation relaxation and underdamped relaxation. When the viscosity is low, damped oscillation shows up, in this approach, the liquid bridge undergoes a damped oscillation process until it reaches its stable shape. However, if the viscous effects become significant, underdamped relaxation occurs. In this case, the liquid bridge relaxes to its equilibrium state in a non-periodic decay mode. In depth analysis indicates that the damping rate and oscillation period of damped oscillation are related to an inertial-capillary time scale τc. These experimental results are also testified by our numerical simulations with COMSOL Multiphysics.
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- 2016
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11. Application of Self-Assembled Raman Spectrum-Enhanced Substrate in Detection of Dissolved Furfural in Insulating Oil
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Haiyang Shi, Weigen Chen, Fu Wan, Lingling Du, Shuhua Zhang, Weiran Zhou, Jiayi Zhang, Yingzhou Huang, and Chengzhi Zhu
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surface-enhanced Raman spectroscopy ,transformer aging ,concentration detection ,Chemistry ,QD1-999 - Abstract
Accurate detection of dissolved aging features in transformer oil is the key to judging the aging degree of oil-paper insulation. In this work, in order to realize in situ detection of furfural dissolved in transformer oil, silver nanoparticles were self-assembled on the surface of gold film with P-aminophenylthiophenol (PATP) as a coupling agent. Rhodamine-6G (R6G) was used as the probe molecule to test the enhancement effect. By optimizing the molecular concentration, molecular deposition time, and silver sol deposition time of PATP, the nanoparticles were made more uniform and compact, and an enhanced substrate with rich hot spots was obtained. The optimum substrate was developed, and surface-enhanced Raman spectroscopy (SERS) detection of trace furfural dissolved in transformer oil was realized. The results showed that the substrate prepared under the conditions of 0.1 mol/L PATP, 5 hours deposition in PATP and 12 hours immersion in silver sol, had the best reinforcement effect (that is, uniform and compact particle arrangement and no particle clusters). By use of this substrate, the minimum detectable concentration of furfural in transformer oil was about 1.06 mg/L, which provides a new method for fast and nondestructive detection of transformer aging diagnosis.
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- 2018
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12. Designing topological interface states in phononic crystals based on the full phase diagrams
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Yan Meng, Xiaoxiao Wu, Ruo-Yang Zhang, Xin Li, Peng Hu, Lixin Ge, Yingzhou Huang, Hong Xiang, Dezhuan Han, Shuxia Wang, and Weijia Wen
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topological interface state ,Zak phase ,phase diagram ,phononic crystal ,Science ,Physics ,QC1-999 - Abstract
The topological invariants of a periodic system can be used to define the topological phase of each band and determine the existence of topological interface states within a certain bandgap. Here, we propose a scheme based on the full phase diagrams, and design the topological interface states within any specified bandgaps. As an example, here we propose a kind of one-dimensional phononic crystals. By connecting two semi-infinite structures with different topological phases, the interface states within any specific bandgap or their combinations can be achieved in a rational manner. The existence of interface states in a single bandgap, in all odd bandgaps, in all even bandgaps, or in all bandgaps, are verified in simulations and experiments. The scheme of full phase diagrams we introduce here can be extended to other kinds of periodic systems, such as photonic crystals and designer plasmonic crystals.
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- 2018
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13. Hollow Au–Ag Alloy Nanorices and Their Optical Properties
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Keke Yu, Xiaonan Sun, Liang Pan, Ting Liu, Anping Liu, Guo Chen, and Yingzhou Huang
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hollow nanorice ,Au–Ag alloy ,surface plasmon ,surface enhanced Raman spectroscopy ,Chemistry ,QD1-999 - Abstract
Hollow noble metal nanoparticles have excellent performance not only in surface catalysis but also in optics. In this work, the hollow Au–Ag alloy nanorices are fabricated by the galvanic replacement reaction. The dark-field spectrum points out that there is a big difference in the optical properties between the pure Ag nanorices and the hollow alloy nanorices that exhibit highly tunable localized surface plasmon resonances (LSPR) and that possess larger radiative damping, which is also indicated by the finite element method. Furthermore, the surface enhanced Raman scattering (SERS) and oxidation test indicate that hollow Au–Ag alloy nanorices show good anti-oxidation and have broad application prospects in surface-plasmon-related fields.
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- 2017
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14. Charge Transfer Effect on Raman and Surface Enhanced Raman Spectroscopy of Furfural Molecules
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Fu Wan, Haiyang Shi, Weigen Chen, Zhaoliang Gu, Lingling Du, Pinyi Wang, Jianxin Wang, and Yingzhou Huang
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surface-enhanced Raman spectroscopy ,density functional theory ,furfural-Mx complexes ,transformer aging ,Chemistry ,QD1-999 - Abstract
The detection of furfural in transformer oil through surface enhanced Raman spectroscopy (SERS) is one of the most promising online monitoring techniques in the process of transformer aging. In this work, the Raman of individual furfural molecules and SERS of furfural-Mx (M = Ag, Au, Cu) complexes are investigated through density functional theory (DFT). In the Raman spectrum of individual furfural molecules, the vibration mode of each Raman peak is figured out, and the deviation from experimental data is analyzed by surface charge distribution. In the SERS of furfural-Mx complexes, the influence of atom number and species on SERS chemical enhancement factors (EFs) are studied, and are further analyzed by charge transfer effect. Our studies strengthen the understanding of charge transfer effect in the SERS of furfural molecules, which is important in the online monitoring of the transformer aging process through SERS.
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- 2017
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15. Plasmon-Mediated Selective Chemical Reaction of Aromatic Molecules with Amino and Nitro Functional Groups
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Xin Xie, Nan Gao, Li Wang, Yurui Fang, and Yingzhou Huang
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General Energy ,Physical and Theoretical Chemistry ,Surfaces, Coatings and Films ,Electronic, Optical and Magnetic Materials - Published
- 2023
16. Metal–Organic Framework Nanoparticle Films for Surface-Enhanced Raman Spectroscopy-Based Autograding in the Odor Intensity of Gas Mixture Generated from Kitchen Waste
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Wenrou Yu, Xin Xie, Lei Wang, Quanwei Lv, Yuanyan Jiang, Wenjun Zhang, Chuan Huang, Li-ao Wang, and Yingzhou Huang
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General Materials Science - Published
- 2022
17. Highly efficient liquid droplet manipulation via human-motion-induced direct charge injection
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Jianfeng Sun, Lingjun Zhang, Yihao Zhou, Zhongjie Li, Alberto Libanori, Qian Tang, Yingzhou Huang, Chenguo Hu, Hengyu Guo, Yan Peng, and Jun Chen
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Mechanics of Materials ,Mechanical Engineering ,General Materials Science ,Condensed Matter Physics - Published
- 2022
18. A 12-bit 200MS/s pipeline ADC with 91 mW power and 66 dB SNDR.
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Maliang Liu, Kaixiong Lian, Yingzhou Huang, Rui Ma 0007, and Zhangming Zhu
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- 2017
- Full Text
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19. Topological ventilated sound switch from acoustic Su-Schrieffer–Heeger model
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Qinhong Li, Xiao Xiang, Li Wang, Yingzhou Huang, and Xiaoxiao Wu
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Physics and Astronomy (miscellaneous) - Abstract
In the last two decades, the emergence of acoustic metamaterials has offered previously unimaginable possibilities for extraordinary control of sound waves. For example, various extremely light-weight sound attenuation systems based on metamaterials and phononic crystals have been demonstrated. Equipped with reconfigurability, such systems will provide the on-demand controls of the passage or stopping of sound waves and are often called acoustic switches or sound switches. However, so far, no ventilated sound switch has been proposed, which can realize both satisfying sound transmission and ventilation. In this work, we demonstrate a topological ventilated sound switch achieving switchable transmission. This switch is based on the one-dimensional acoustic Su-Schrieffer–Heeger model, which leads to the appearance of the topological interface states, and the sound can be turned on or off with the desired ventilation performance. With only one topological unit, the high transmission ratio (∼20 dB) before and after switch has been demonstrated in both simulations and experiments. It should have potential applications in areas of the acoustic engineering where both specific frequency sound transmission and ventilation are required.
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- 2023
20. Enhanced response of titanium doped iron(ii) oxalate under electric field
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Chunde Li, Hua Wei, Xueyan Hu, Zhaoxian Chen, Xin Xie, Guo Chen, Anping Liu, Yingzhou Huang, and Weijia Wen
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General Chemical Engineering ,General Chemistry - Abstract
Electrorheological (ER) fluid, containing polarized particles within an insulating liquid, represents a smart material, the mechanical properties of which can be altered mainly by an electric field. In this work, ER fluids based on cauliflower iron(ii) oxalate doped titanium particles show excellent rheological and wetting properties by the sample co-precipitation method. The morphology of the particles is observed by SEM and the molecular structure within the particles is obtained
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- 2022
21. Prediction for odor gas generation from domestic waste based on machine learning
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Yuanyan Jiang, Jiawei Huang, Wei Luo, Kejin Chen, Wenrou Yu, Wenjun Zhang, Chuan Huang, Junjun Yang, and Yingzhou Huang
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Waste Management and Disposal - Abstract
Domestic waste is prone to produce a variety of volatile organic compounds (VOCs), which often has unpleasant odors. A key process in treating odor gases is predicting the production of odors from domestic waste. In this study, four factors of domestic waste (weight, wet composition, temperature, and fermentation time) were adopted to be the prediction indicators in the prediction for domestic waste odor gases. Machine learning models (Random Forest, XGBoost, LightGBM) were established using the odor intensity values of 512 odor gases from domestic waste. Based on these data, the regression prediction with supervised machine learning was achieved, in which three different algorithmic models were evaluated for prediction performance. A Random Forest model with a R
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- 2022
22. Plasmonic and Photonic Enhancement of Chiral Near‐Fields
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Li Hu, Zhiguang Sun, Yingdong Nie, Yingzhou Huang, and Yurui Fang
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Condensed Matter Physics ,Atomic and Molecular Physics, and Optics ,Electronic, Optical and Magnetic Materials - Published
- 2022
23. Plasmonic hybridization properties in polyenes octatetraene molecules based on theoretical computation
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Nan Gao, Guodong Zhu, Yingzhou Huang, and Yurui Fang
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General Physics and Astronomy - Abstract
Relationship of plasmonic properties of multiple clusters to molecular interactions and properties of a single cluster or molecule have become increasingly important due to the continuous emergence of molecular and cluster devices or systems. A hybrid phenomenon similar to plasmonic nanoparticle hybridization exists between two molecules with plasmon excitation modes. We use linear-response time-dependent density functional theory, real-time propagation time-dependent density functional theory, the plasmonicity index, and transition contribution maps (TCMs) to identify the plasmon excitation modes for the linear polyenes octatetraene with –OH and –NH2 groups and analyze the hybridization characteristics using charge transitions. The results show that molecular plasmon hybridization exists when the two molecules are coupled. The TCM analysis shows that the plasmon modes and hybridization result from collective and single-particle excitation. The plasmon mode is stronger, and the individual properties of the molecules are maintained after coupling when there is extra charge depose in the molecules because the electrons are moving in the molecules. This study provides new insights into the molecular plasmon hybridization of coupled molecules.
- Published
- 2023
24. Plasmon-driven catalytic reactions in optoplasmonic sandwich hybrid structure
- Author
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Xin Zhang, Xin Xie, Lingjun Zhang, Zhaoxian Chen, and Yingzhou Huang
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Electrical and Electronic Engineering ,Engineering (miscellaneous) ,Atomic and Molecular Physics, and Optics - Abstract
As an interesting phenomenon in the field of surface enhanced Raman spectroscopy (SERS), the plasmon-driven catalytic reaction (PDSC) induced by plasmonic hot electrons has great value in the research of novel properties of surface plasmons and accuracy of SERS applications. In this work, an optoplasmonic sandwich hybrid structure is proposed for studying PDSC of p -aminothiophenol (PATP) molecules, which is composed of Au film, metal organic frameworks (MOFs) nanoparticles, zeolithic imidazolate (ZIF-8), and single S i O 2 microsphere (Au f i l m @ M O F s @ S i O 2 ). In order to analyze the novel, to the best of our knowledge, phenomenon of the PDSC in this micro-nano structure, the hot electron generation in the MOF without the plasmonic core is carried out by combining the plasmonic enhancement of gold film with the light concentration of microspheres. Experimental data show that the PDSC reactions is dependent on the size of the MOFs nanoparticle and the size of the S i O 2 microsphere, which is confirmed by the electromagnetic field simulation of the finite-difference time-domain method (FDTD). Our work not only strengthens the understanding of surface plasmon in optoplasmonic hybrid structures but also has broad application prospects in the SERS and plasmon-driven catalytic fields.
- Published
- 2023
25. Optoplasmonic MOFs film for SERS detection
- Author
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Xin Zhang, Xin Xie, Lingjun Zhang, Kaibin Yao, and Yingzhou Huang
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Photons ,Silver ,Metal Nanoparticles ,Silicon Dioxide ,Spectrum Analysis, Raman ,Instrumentation ,Spectroscopy ,Atomic and Molecular Physics, and Optics ,Analytical Chemistry - Abstract
Optoplasmonic hybrid structures composed of photonic and plasmonic elements with excellent optical properties are of great significance for the development of surface-enhanced Raman spectroscopy (SERS) substrates. In this work, the optoplasmonic hybrid structure is composed of SiO
- Published
- 2022
26. Screening the Ion Compositions on Crystal Morphology Transitions by a Microfluidic Chip with a Well-Defined Concentration Gradient
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Shuxia Wang, Shunbo Li, Lingjun Zhang, Zhijun Wang, Yingzhou Huang, Li Chen, Hong He, Tingting Ge, and Xiao Xiang
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Materials science ,010405 organic chemistry ,General Chemistry ,010402 general chemistry ,Condensed Matter Physics ,Crystal morphology ,01 natural sciences ,0104 chemical sciences ,Ion ,Morphology control ,Microfluidic chip ,Chemical engineering ,General Materials Science ,Concentration gradient - Abstract
The effects of organic and inorganic additives on crystal morphology have been extensively studied in various materials. However, the basic fundamentals behind the morphology control are still unde...
- Published
- 2020
27. Au nanobowtie on a SiO
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Jihao, Wang, Hua, Wei, Chenyang, Wang, Yingzhou, Huang, Guo, Chen, and Anping, Liu
- Abstract
The combination of photonic and plasmonic elements with complementary optical properties has stimulated the development of optoplasmonic hybrid systems, in which photonic and plasmonic elements can interact synergistically, breaking through the limitations of traditional structures. In this paper, a new optoplasmonic tweezer is theoretically proposed by using the Au nanobowtie and
- Published
- 2021
28. Self‐powered In‐Phase Sensing and Regulating Mechanical System Enabled by Nanogenerator and Electrorheological Fluid
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Jianfeng Sun, Lingjun Zhang, Xindan Hui, Yingzhou Huang, Jie Chen, Chenguo Hu, Hengyu Guo, Song Qi, and Zhong Lin Wang
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Biomaterials ,Electrochemistry ,Condensed Matter Physics ,Electronic, Optical and Magnetic Materials - Published
- 2022
29. Frequency-tunable sound insulation via a reconfigurable and ventilated acoustic metamaterial
- Author
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Xing Li, Haozhe Zhang, Hongxing Tian, Yingzhou Huang, and Li Wang
- Subjects
Acoustics and Ultrasonics ,Condensed Matter Physics ,Surfaces, Coatings and Films ,Electronic, Optical and Magnetic Materials - Abstract
In acoustic engineering, sound-proofing ventilation barriers find wide applications in diverse situations. However, most of the structures only have responses with fixed frequencies and a very narrow frequency range, especially for low frequency acoustics. Here we show a subwavelength acoustic metamaterial based on labyrinthine structures, which possesses tunable sound insulation and ventilation properties. The Fano-like asymmetric transmission dips is formed by the interference between the resonant scattering of discrete states and the background scattering of continuous states. By adjusting the spacing between these two half zigzag molds, the sound insulation dip frequency can shift from 360 Hz to 575 Hz while the free ventilation area ratio is kept to over 36.3% and the total thickness is only about 0.06λ. Moreover, the noise peak frequency can be detected by a microphone detection and adaptive adjustment of the spacing with a small stepping motor is demonstrated, the results agree well with numerical simulations. We anticipate our design may find potential applications in acoustic air vents, soundproofing window and duct noise control.
- Published
- 2022
30. Plasmon-Driven Interfacial Catalytic Reactions in Plasmonic MOF Nanoparticles
- Author
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Huanbao Fa, Yaoyao Zhang, Yingzhou Huang, Lingjun Zhang, Xie Xin, and Jiangen Zheng
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Nanostructure ,Chemistry ,Nanoparticle ,engineering.material ,Nanoshell ,Analytical Chemistry ,Catalysis ,symbols.namesake ,Chemical engineering ,Phase (matter) ,engineering ,symbols ,Noble metal ,Raman spectroscopy ,Plasmon - Abstract
Benefiting from the noble metal nanoparticle core and organic porous nanoshell, plasmonic metal-organic frameworks (MOFs) become a nanostructure with great enhancement of the electromagnetic field and a high density of reaction sites, which has fantastic optical properties in surface plasmon-related fields. In this work, the plasmon-driven interfacial catalytic reactions involving p-aminothiophenol to 4,4'-dimercaptoazobenzene (trans-DMAB) in both the liquid and gaseous phases are studied in plasmonic MOF nanoparticles, which consist of a Ag nanoparticle core and an organic shell (ZIF-8). The surface-enhanced Raman spectroscopy (SERS) spectra recorded at the plasmonic MOF in an aqueous environment demonstrate that the reversible plasmon-driven interfacial catalytic reactions could be modulated by a reductant (NaBH4) or oxidant (H2O2). Also, the situ SERS spectra also point out that plasmonic MOF (AgNP@ZIF-8) nanoparticles exhibit much better catalytic performance in the H2O2 solution compared to pure Ag nanoparticles for the anti-oxidation caused by the MOF shell. It is surprising that although there is greater SERS enhancement obtained at pure Ag nanoparticles, the plasmon-driven interfacial catalytic reactions only occur at plasmonic AgNP@ZIF-8 nanoparticles in the gaseous phase. This interesting phenomenon is further confirmed and analyzed by simulated electromagnetic field distributions, which could be understood by the effective capture of gaseous molecules by the organic porous nanoshell. Our work not only explores the plasmonic MOF nanoparticles with unique optical properties but also strengthens the understanding of plasmon-driven interfacial catalytic reactions.
- Published
- 2021
31. Ultra-broadband metamaterial silencer with outstanding heat-transferring performance
- Author
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Xiaonan Yuan, Qinhong Li, Xiao Xiang, Jiawei Jiao, Yingzhou Huang, and Xiaoxiao Wu
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Fluid Flow and Transfer Processes ,Mechanics of Materials ,Mechanical Engineering ,Computational Mechanics ,Condensed Matter Physics - Abstract
It is desired to achieve broadband noise reduction while supporting heat and fluids transmission simultaneously. However, attenuating sound energy with simultaneously achieving excellent heat-transferring performance in a fluid environment has yet to be explored. Here, we demonstrate an ultra-broadband absorber with outstanding thermal convection under a fluid environment, whose thickness is only λ/15 (λ is the airborne wavelength). By linearly extending the embedded apertures, the silencer can achieve sound absorption in the range of 455–585 Hz and can block more than 90% of sound energy in the ultra-broadband range of 455–1600 Hz. In addition, the outstanding thermal convection performance of the metamaterial absorber is experimentally demonstrated.
- Published
- 2022
32. Tribo-electrophoresis preconcentration enhanced ultra-sensitive SERS detection
- Author
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Lingjun Zhang, Jianfeng Sun, Yurui Fang, Yingzhou Huang, Hengyu Guo, and Zhong Lin Wang
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Renewable Energy, Sustainability and the Environment ,General Materials Science ,Electrical and Electronic Engineering - Published
- 2022
33. THE STUDY ON RESIDENTS' CHOICE OF SOLID WASTE SORTING MEASURES BY PIVOTAL STATISTICS AND STRUCTURAL EQUATION MODEL.
- Author
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Wenjun Zhang, Wenrou Yu, Yuanyan Jiang, Jiawei Huang, Chuan Huang, Li-ao Wang, Xiang Wang, Lei Wang, and Yingzhou Huang
- Abstract
Domestic solid waste (DSW) sorting was the core task of waste-free city buildings. Implementing domestic solid waste sorting measures that residents were willing to accept, was an effective way for municipal solid waste management. This study used online questionnaires which investigated 777 adults across China to research the residents' choices and the influence factors. Pivotal statistics method and structural equation model were used to analyze the main factors and their impact levels on 4 target variables, such as "expected distance from DSW disposal point". The results showed that age obviously determined the residents' choice of these 4 target variables to a large extent. At the same time, the residents' DSW sorting willingness was also greatly affected by the corresponding external factors. Finally, the study put forward relevant recommendations for the comprehensive management of urban DSW sorting and recycling at the community level. The study may play an important role in promoting domestic solid waste sorting. [ABSTRACT FROM AUTHOR]
- Published
- 2022
34. Sandwich optoplasmonic hybrid structure for surface enhanced Raman spectroscopy
- Author
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Yuan Yuan, Sheng Yan, Yingzhou Huang, Xin Zhang, Chenyang Wang, Jihao Wang, and Suxia Hou
- Subjects
Silver ,business.industry ,Chemistry ,Surface plasmon ,Metal Nanoparticles ,Dielectric ,Substrate (electronics) ,Surface-enhanced Raman spectroscopy ,Microstructure ,Silicon Dioxide ,Spectrum Analysis, Raman ,Atomic and Molecular Physics, and Optics ,Analytical Chemistry ,Limit of Detection ,Electric field ,Optoelectronics ,Photonics ,business ,Instrumentation ,Spectroscopy ,Plasmon - Abstract
Combined with photonic microstructure and plasmonic nanostructure, the optoplasmonic hybrid structure with fantastic optical properties attracts lots of attentions in recent years. With the help of light enrichment by dielectric photonic microenvironment, the embedded plasmonic nanoantennas generate much greater electromagnetic field enhancement at surface for light harvesting compared to conventional plasmonic nanostructures. In this work, a sandwich optoplasmonic hybrid structure is developed for surface enhanced Raman spectroscopy (SERS) detection, which is consisted of polymethyl methacrylate (PMMA) microspheres array, self-assembled Ag nanoparticles (AgNPs) film and SiO2 microsphere (PMMA@AgNPs@SiO2). The SERS spectra collected on this optoplasmonic substrate point out it has high sensitivity with limit of detection (LOD) at 10 fM. The experimental data demonstrate both the PMMA microarray and SiO2 microsphere play important roles in enrichment of light illuminating at AgNPs for SERS detection, which is confirmed by the simulated electric field distributions. This sandwich optoplasmonic hybrid structure not only enlarges research field of surface plasmon, but also provides a novel SERS subtract for sensitive analysis in chem/bio-field.
- Published
- 2021
35. Microdroplet extraction assisted ultrasensitive Raman detection in complex oil
- Author
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Jianfeng Sun, Yingzhou Huang, Weigen Chen, Haiyang Shi, Hong He, and Lingjun Zhang
- Subjects
Materials science ,Biomedical Engineering ,Bioengineering ,02 engineering and technology ,Furfural ,01 natural sciences ,Biochemistry ,High-performance liquid chromatography ,chemistry.chemical_compound ,symbols.namesake ,medicine ,Molecule ,Mineral oil ,Detection limit ,Chromatography ,010401 analytical chemistry ,Extraction (chemistry) ,General Chemistry ,021001 nanoscience & nanotechnology ,Fluorescence ,0104 chemical sciences ,chemistry ,symbols ,0210 nano-technology ,Raman spectroscopy ,medicine.drug - Abstract
The Raman detection of trace substances in complex oil is still a great challenge at present because of the strong disturbance of background activity and the suppression of intensity in spectra caused by complicated components. In this work, a simple and robust approach based on microdroplet liquid-liquid extraction for the real-time Raman spectroscopy monitoring of trace substances in complex oil is reported. Based on unbalanced chemical potentials between water and oil on a microfluidic chip, a target trace molecule is extracted from complex mineral oil to a water microdroplet. Benefiting from the real-time fluorescence intensities of fluorescein in a water microdroplet, the extraction performance is investigated and optimized. The optimal water microdroplet is implemented for the Raman detection of furfural in a complex mineral oil, a typical trace performance marker in electric power equipment, and this exhibits excellent sensitivity with a limit of detection (LOD) of 26 ppb. Compared to traditional detection technology for trace substances in complex oil (high performance liquid chromatography, HPLC), this method greatly simplified the process of measurement, reduced the volume of sample required, had a fast measurement time, and exhibited the prospect of real-time monitoring applications with high sensitivity, which not only promotes the development of oil quality but also enlarges existing knowledge related to using Raman spectroscopy in chem-/bio-sensing.
- Published
- 2021
36. Acoustic absorbers at low frequency based on split-tube metamaterials
- Author
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Peng Wu, Qianjin Mu, Shuxia Wang, Xiaoxiao Wu, Yingzhou Huang, Weijia Wen, Xin Li, Yuqing Zhou, and Li Wang
- Subjects
Physics ,Computer Science::Sound ,Acoustics ,Acoustic metamaterials ,Physics::Optics ,General Physics and Astronomy ,Metamaterial ,Tube (fluid conveyance) ,Point (geometry) ,Low frequency ,Physics::Classical Physics - Abstract
The remarkable properties of acoustic metamaterials have attracted massive researches and applications, especially on low-frequency sound absorptions. Currently, most of the acoustic metamaterial absorbers employ resonances in plastic cavities, and their structural strengths are important in many circumstances, especially in harsh environment. However, studies of metamaterials including this point are very scarce. Here, we propose an acoustic metamaterial for low-frequency (
- Published
- 2019
37. Electrospinning Fabricating Au/TiO2 Network-like Nanofibers as Visible Light Activated Photocatalyst
- Author
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Shijian Chen, Yingzhou Huang, Zhuojun Duan, and Dingke Zhang
- Subjects
0301 basic medicine ,Multidisciplinary ,Materials science ,Science ,Nanoparticle ,Article ,Sensors and biosensors ,Electrospinning ,03 medical and health sciences ,chemistry.chemical_compound ,030104 developmental biology ,0302 clinical medicine ,chemistry ,Chemical engineering ,Electronic and spintronic devices ,Nanofiber ,Photocatalysis ,Rhodamine B ,Medicine ,Reactivity (chemistry) ,Photodegradation ,030217 neurology & neurosurgery ,Visible spectrum - Abstract
Exploiting photocatalysts with characteristics of low cost, high reactivity and easy recovery offer great potentials for complete elimination of toxic chemicals and environmental remediation. In this work, Au/TiO2 network-like nanofibers were fabricated using a facile electrospinning technique followed by calcinations in air. Photocatalytic tests indicate that the Au/TiO2 network-like nanofibers possess an excellent photodegradation rate of rhodamine B (RB) under UV, visible and natural light radiation. The enhanced photocatalytic activity can be attributed to the plasmonic resonance absorption of Au nanoparticles, and photogenerated electrons and holes are effectively separated by the Au/TiO2 heterojunction structures. Furthermore, the three-dimensional network structure can provide a large number of active sites for RB degradation.
- Published
- 2019
38. Suppression of coffee-ring effect via periodic oscillation of substrate for ultra-sensitive enrichment towards surface-enhanced Raman scattering
- Author
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Weijia Wen, Lingjun Zhang, Yingzhou Huang, Bingpu Zhou, Shuangpeng Wang, Mingzhong Li, Man-Kay Law, and Bing Ji
- Subjects
Detection limit ,Analyte ,Materials science ,Analytical chemistry ,Coffee ring effect ,Nanoparticle ,Substrate (chemistry) ,02 engineering and technology ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,0104 chemical sciences ,symbols.namesake ,Colloidal gold ,symbols ,General Materials Science ,0210 nano-technology ,Raman spectroscopy ,Raman scattering - Abstract
Surface-enhanced Raman scattering (SERS) has attracted extensive interest due to excellent molecule recognition and sensitive concentration detection. Nevertheless, the coffee ring effect (CR) during the analyte evaporation always causes an uneven distribution of the assembled hot-spots, and hence the unreliable SERS signal is produced. In this study, for the first time, we present a suppressed coffee ring (SCR) system via a combination of a magnetically functionalized membrane and reciprocating magnetic field to dynamically suppress the CR for highly reliable and ultra-sensitive SERS detection. The enrichment mechanism of the nanoparticles and the analyte molecules within the sessile droplet based on the proposed system was studied. We experimentally observed that the driving frequency could well affect the final pattern, and typically a higher driving frequency facilitated a smaller coverage area with better enrichment performance. With the use of R6G molecule and (100 nm) gold nanoparticles, we examined the uniformity and SERS of the assembled ‘hot-spots’ in the SCR system. The results indicate that the uniformity can be greatly improved via SCR in comparison of ring stain, with the RSD of a Raman signal as low as 7.1% even at a low concentration of 10−12 mol L−1. Such system also enables the further enhancement in the SERS signal, with the detection limit down to 10−16 mol L−1, the enhancement factor magnitude up to 1013, and the linear relationship between the SERS intensity and the analyte concentrations within the range of 10−6–10−12 and 10−12–10−16 mol L−1, respectively. The applicability of the SCR-based SERS detection for diverse analytes was also proved with a similar but further enhanced signal of MB and 4-ATP. We believe that the excellent SCR-based SERS performance via the proposed system has great potentials for ultra-sensitive detection and/or precise quantitative analysis in various research fields and applications.
- Published
- 2019
39. Optoplasmonic film for SERS
- Author
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Xiaonan Sun, Chuanyu Liu, Yingzhou Huang, Jialing Shi, and Lili Ju
- Subjects
Nanostructure ,business.industry ,Chemistry ,Surface plasmon ,02 engineering and technology ,Surface-enhanced Raman spectroscopy ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,Ray ,Atomic and Molecular Physics, and Optics ,0104 chemical sciences ,Analytical Chemistry ,law.invention ,Lens (optics) ,Light intensity ,law ,Optoelectronics ,Photonics ,0210 nano-technology ,business ,Instrumentation ,Spectroscopy ,Plasmon - Abstract
Combining plasmonic and photonic elements, optoplasmonic hybrid structure exhibits excellent optical properties beyond conventional plasmonic or photonic structures. In this work, the optoplasmonic film consists of SiO2 microsphere and Au film without any nanostructures is investigated. With the help of a microsphere, the intensity of surface enhanced Raman spectroscopy (SERS) on Au film is highly enhanced (~1000 times) compared to bare Au film. The simulated electromagnetic field points out the enhancement caused by the optical lens effect of SiO2 microsphere that high light intensity is generated under the microsphere to excite surface plasmon on Au film. Furthermore, our data demonstrates the microsphere lens enhancement is greatly influenced by the size of the SiO2 microsphere and wavelength of incident light. This interesting film with a simple configuration could overcome the challenges in the fabrication and store process induced by nanostructures, which play an important role in SERS application. Our work not only enlarges the knowledge of the optoplasmonic hybrid structure, but also exhibits excellent application prospective in light harvest field e.g. enhanced spectrum, photocatalysis, optothermal effect, and hot electron generation, etc.
- Published
- 2020
40. Strong confinement of gap modes induced by the film modified electric and magnetic modes in dielectric nanoparticle dimers
- Author
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Yurui Fang, Xin Zhang, Yingzhou Huang, Jialing Shi, and Lili Ju
- Subjects
Electromagnetic field ,Condensed matter physics ,Dimer ,Surface plasmon ,Physics::Optics ,Nanoparticle ,Dielectric ,Surface-enhanced Raman spectroscopy ,Atomic and Molecular Physics, and Optics ,Analytical Chemistry ,Condensed Matter::Materials Science ,chemistry.chemical_compound ,chemistry ,Electric field ,Instrumentation ,Magnetic dipole ,Spectroscopy - Abstract
Nanogaps are one of the most useful systems in nanooptics. The gap modes in a film coupled dielectric nanoparticle dimer system are influenced by both of the film and the electric and magnetic modes of the particles. In this work, strong confinement of gap modes of dielectric (Si) nanoparticle dimer on Au/Si film is investigated. The results show an abnormal electric field enhancement obtained between Si nanoparticle dimer on metal film, which is attributed to film coupled electric and magnetic dipole modes in dielectric nanoparticle dimer. The results are further analyzed with mode hybridization theory. Furthermore, the surface enhanced Raman spectroscopy (SERS) is performed to demonstrate these theoretical analyses. The film induced electromagnetic field redistribution in dielectric nanoparticle dimer not only extend the knowledge of dielectric gap modes but also has tremendous applications, e.g. light manipulating in subwavelength, light harvest, surface enhanced spectrum, etc.
- Published
- 2022
41. Light focusing in linear arranged symmetric nanoparticle trimer on metal film system
- Author
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Yurui Fang, Yingzhou Huang, Shuxia Wang, and Yuxia Tang
- Subjects
Metal ,Materials science ,visual_art ,visual_art.visual_art_medium ,General Physics and Astronomy ,Nanoparticle ,Trimer ,Molecular physics - Abstract
Benefiting from the induced image charge on film surface, the nanoparticle aggregating on metal exhibits interesting optical properties. In this work, a linear metal nanoparticle trimer on metal film system has been investigated to explore the novel optical phenomenon. Both the electric field and surface charge distributions demonstrate the light is focused on film greatly by the nanoparticles at two sides, which could be strongly modulated by the wavelength of incident light. And the influence of nanoparticle in middle on this light focusing ability has also been studied here, which is explained by the plasmon hybridization theory. Our finding about light focusing in nanoparticle aggregating on metal film not only enlarges the novel phenomenon of surface plasmon but also has great application prospect in the field of surface-enhanced spectra, surface catalysis, solar cells, water splitting, etc.
- Published
- 2022
42. Coherent Enhancement of Dual-Path-Excited Remote SERS
- Author
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Anping Liu, Yingzhou Huang, Yuan Yuan, Zhuohao Li, Lingjun Zhang, and Jianfeng Sun
- Subjects
Materials science ,business.industry ,010401 analytical chemistry ,Surface plasmon ,02 engineering and technology ,021001 nanoscience & nanotechnology ,01 natural sciences ,Ray ,Surface plasmon polariton ,0104 chemical sciences ,symbols.namesake ,symbols ,Polariton ,Optoelectronics ,General Materials Science ,Raman optical activity ,0210 nano-technology ,Raman spectroscopy ,business ,Raman scattering ,Localized surface plasmon - Abstract
Combining both localized surface plasmon polaritons (LSPPs) and propagating surface plasmon polaritons, remote surface-enhanced Raman scattering (SERS) emerges as a novel sensing technology in recent years, which could avoid the overlap of incident light and inelastic scattering light in SERS. Compared to traditional SERS, it has novel applications in sensors, plasmon-driven surface-catalyzed reactions, Raman optical activity, etc. However, the weak Raman intensity of remote SERS impedes its further application. In this work, we demonstrated that the remote SERS signals could be enhanced by more than 100% through the subwavelength interference in dual-path-excited Ag-branched nanowire dimer and nanowire-nanoparticle systems. Our experiment has revealed that remote SERS intensities could be modulated by polarization and phase differences of two incident lights illuminating at two separate nanowire terminals. The simulated electromagnetic field distributions through the finite-difference time-domain (FDTD) method indicate that subwavelength interference occurs in Ag nanowires, which causes the Raman intensities collected at a remote site is greatly influenced by the coherent superposition of propagating surface plasmon polaritons (PSPPs). Our work on this coherent enhancement could not only promote the application of remote SERS but also enlarge the research on light manipulating in the subwavelength.
- Published
- 2020
43. Manually Tunable Ventilated Metamaterial Absorbers
- Author
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Hongxing Tian, Xiao Xiang, Weijia Wen, Xiaoxiao Wu, and Yingzhou Huang
- Subjects
010302 applied physics ,Absorption (acoustics) ,Materials science ,Physics and Astronomy (miscellaneous) ,Acoustics ,Fluid Dynamics (physics.flu-dyn) ,Metamaterial ,Physics::Optics ,FOS: Physical sciences ,02 engineering and technology ,Physics - Applied Physics ,Physics - Fluid Dynamics ,Applied Physics (physics.app-ph) ,Lossy compression ,021001 nanoscience & nanotechnology ,01 natural sciences ,Transmission (telecommunications) ,Slider ,0103 physical sciences ,Limit (music) ,Acoustic metamaterials ,Sound Absorber ,0210 nano-technology - Abstract
For most acoustic metamaterials, once they have been fabricated, their operating frequencies and functions cannot be adjusted, which is an intrinsic barrier for development of realistic applications. The study to overcome this limit has become a significant issue in acoustic metamaterial engineering. Although with the advance of metamaterials in the past two decades, a series of methods such as electric or magnetic control have been proposed, most of them can only work in the condition of no fluid passage. Some metamaterials with large transmission losses have been proposed, but the sounds are essentially reflected rather than absorbed. Here, to overcome this intrinsic difficulty, we propose a ventilated sound absorber that can be manually tuned in a large range after being manufactured. During the tuning which is achieved through an intricately designed slider, high-performance absorption and ventilation are both ensured. The tunable ventilated sound absorber is demonstrated experimentally and the effective model of coupled lossy oscillators can be employed to understand its mechanism. The manually tunable ventilated metamaterial has the potential application values in various complicated pipe systems that require frequency adjustment and it also establishes the foundation for future development of active tunable ventilated acoustic metamaterials.
- Published
- 2020
- Full Text
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44. Organic Molecule Detection Based on SERS in Microfluidics
- Author
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Yuan Yuan, Zeng Zugang, Sheng Yan, Yingzhou Huang, Xin Zhang, Haiyan Zhang, Anping Liu, and Huang Anshou
- Subjects
Nanophotonics and plasmonics ,Multidisciplinary ,Fabrication ,Microchannel ,Materials science ,lcsh:R ,Microfluidics ,Finite-difference time-domain method ,lcsh:Medicine ,Substrate (chemistry) ,Environmental monitoring ,Nanotechnology ,02 engineering and technology ,Surface-enhanced Raman spectroscopy ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,Article ,0104 chemical sciences ,Molecule ,lcsh:Q ,lcsh:Science ,0210 nano-technology ,Plasmon - Abstract
Sensitive in situ detection of organic molecules is highly demanded in environmental monitoring. In this work, the surface enhanced Raman spectroscopy (SERS) is adopted in microfluidics to detect the organic molecules with high accuracy and high sensitivity. Here the SERS substrate in microchannel consists of Ag nanoparticles synthesized by chemical reduction. The data indicates the fabrication conditions have great influence on the sizes and distributions of Ag nanoparticles, which play an important role on the SERS enhancement. This result is further confirmed by the simulation of electromagnetic field distributions based on finite difference time domain (FDTD) method. Furthermore, the SERS spectra of organic molecule (methylene blue) obtained in this plasmonic microfluidic system exhibit good reproducibility with high sensitivity. By a combination of SERS and microfluidics, our work not only explores the research field of plasmonics but also has broad application prospects in environmental monitoring.
- Published
- 2019
45. Material influence on hot spot distribution in the nanoparticle heterodimer on film
- Author
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Shuxia Wang, Hua Wei, Weijia Wen, Fang Chen, Wenbin Cao, Yingzhou Huang, and Xiping Zeng
- Subjects
Materials science ,Dimer ,Surface plasmon ,Nanoparticle ,02 engineering and technology ,Dielectric ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,01 natural sciences ,Atomic and Molecular Physics, and Optics ,0104 chemical sciences ,Electronic, Optical and Magnetic Materials ,law.invention ,Light intensity ,chemistry.chemical_compound ,Chemical engineering ,chemistry ,law ,Solar cell ,Surface charge ,0210 nano-technology ,Plasmon - Abstract
The metal nanoparticle aggregated on film, as an effective plasma enhancement pathway, has been widely used in various surface plasmon-related fields. In this study, the hot spots on the metal nanoparticle dimer composed of different materials (Ag Au, Ag Pd, and Ag Cu) on metal (Au) film were investigated with finite element method . Based on the results, the hot spot distribution affected by the material can be confirmed by the electric field distribution of the metal nanoparticle dimer on the film. The aggregation effects of Au and Ag nanoparticles in Au Ag dimer system are not significant. However, for the Pd Ag dimer system, the hot spot aggregation effect is slightly larger than that of the Pd nanoparticle under the Ag nanoparticle. Besides, the non-uniform hot spots would bring about the light focusing phenomenon that the light intensity under Ag nanoparticle is almost 100 times greater than that under Cu nanoparticle in Ag Cu dimer system. These results were further confirmed by the surface charge distribution, and analyzed based on the plasmonic hybridization theory. The data about the nanoparticle dimer on the dielectric (Si) film demonstrate the importance of induced image charges on the film surface in such a light focusing phenomenon. Our findings can enhance the understanding of the surface plasmon coupling in different materials, which may have great application prospects in surface plasmon-related fields, such as SERS, plasmonic enhanced solar cell, and plasmonic sensoring, etc.
- Published
- 2018
46. Self-assembly 2D plasmonic nanorice film for surface-enhanced Raman spectroscopy*
- Author
-
Tingting Liu, Sun Xiaonan, Yingzhou Huang, Jialing Shi, Chuanyu Liu, and Lingjun Zhang
- Subjects
Materials science ,Nanostructure ,Electric field ,Surface plasmon ,General Physics and Astronomy ,Nanotechnology ,Self-assembly ,Substrate (electronics) ,Surface-enhanced Raman spectroscopy ,Polarization (electrochemistry) ,Plasmon - Abstract
As an ultrasensitive sensing technology, the application of surface enhanced Raman spectroscopy (SERS) is one interesting topic of nano-optics, which has huge application prospectives in plenty of research fields. In recent years, the bottleneck in SERS application could be the fabrication of SERS substrate with excellent enhancement. In this work, a two-dimensional (2D) Ag nanorice film is fabricated by self-assembly method as a SERS substrate. The collected SERS spectra of various molecules on this 2D plasmonic film demonstrate quantitative detection could be performed on this SERS substrate. The experiment data also demonstrate this 2D plasmonic film consisted of anisotropic nanostructures has no obvious SERS polarization dependence. The simulated electric field distribution points out the SERS enhancement comes from the surface plasmon coupling between nanorices. And the SERS signals is dominated by molecules adsorbed at different regions of nanorice surface at various wavelengths, which could be a good near IR SERS substrate for bioanalysis. Our work not only enlarges the surface plasmon properties of metal nanostructure, but also exhibits the good application prospect in SERS related fields.
- Published
- 2021
47. Rotational viscosity of nematic lyotropic chromonic liquid crystals
- Author
-
Ling-Feng Chen, Li Guyuan, Zhao Tian, Yingzhou Huang, Maitiniyazi Bake, Yu Jiajia, and Li Yourong
- Subjects
Birefringence ,Materials science ,Sodium ,Analytical chemistry ,chemistry.chemical_element ,Condensed Matter Physics ,Atomic and Molecular Physics, and Optics ,Electronic, Optical and Magnetic Materials ,chemistry.chemical_compound ,chemistry ,Liquid crystal ,Sodium hydroxide ,Rotational viscosity ,Lyotropic ,Materials Chemistry ,Chromonic ,Physical and Theoretical Chemistry ,Anisotropy ,Spectroscopy - Abstract
Lyotropic chromonic liquid crystal has great application potential in the areas of the biology, medicine, and optics due to its biocompatibility, nontoxicity, biodegradability and birefringence. The rotating magnetic field method was used to measure the rotational viscosity of nematic Sunset Yellow, disodium cromoglycate and Sunset Yellow doping of magnesium sulfate, sodium chloride and sodium hydroxide at various temperatures and concentrations. The rotational viscosity of nematic lyotropic chromonic liquid crystals is positively correlated with the square of the average length of columnar aggregates, increasing with the increase of concentration, but decreasing exponentially as temperature increases. This paper established a universal empirical expression of the rotational viscosity of nematic lyotropic chromonic liquid crystals and presented that the largest relative deviation between theoretical calculation and experimental results is only 22.60%. The rotational viscosity of nematic lyotropic chromonic liquid crystals becomes intensive with the increasing of magnesium sulfate and sodium chloride concentrations, while it reduces with the increase of sodium hydroxide concentration. The “one-step method” is proposed here that one sample of nematic LCLCs at various temperatures can replace normal materials to evaluate the influences of the shape anisotropy of molecules or colloidal particles on the research target, such as physical property parameters, depletion interaction potentials, and so on. This method is based on the self-assembly ability difference of lyotropic chromonic liquid crystal molecules at various temperatures and has been proved to be reliable by comparison with the results obtained from many samples of nematic 5CB, CBP5, 5PCB, et al.
- Published
- 2021
48. Automatically Adaptive Ventilated Metamaterial Absorber for Environment with Varying Noises
- Author
-
Hongxing Tian, Chuanyu Liu, Keming He, Suxia Hou, Weijia Wen, Yingzhou Huang, Xiao Xiang, Shuxia Wang, and Xiaoxiao Wu
- Subjects
Microcontroller ,Materials science ,Mechanics of Materials ,Acoustics ,Metamaterial absorber ,General Materials Science ,Industrial and Manufacturing Engineering - Published
- 2021
49. Au nanobowtie on a SiO2 microsphere for optoplasmonic trapping
- Author
-
Yingzhou Huang, Hua Wei, Anping Liu, Jihao Wang, Chenyang Wang, and Guo Chen
- Subjects
Materials science ,Polydimethylsiloxane ,business.industry ,Optical force ,Physics::Optics ,Trapping ,Pressure-gradient force ,Atomic and Molecular Physics, and Optics ,chemistry.chemical_compound ,Optics ,chemistry ,Optical tweezers ,Electric field ,Optoelectronics ,Electrical and Electronic Engineering ,Photonics ,business ,Engineering (miscellaneous) ,Plasmon - Abstract
The combination of photonic and plasmonic elements with complementary optical properties has stimulated the development of optoplasmonic hybrid systems, in which photonic and plasmonic elements can interact synergistically, breaking through the limitations of traditional structures. In this paper, a new optoplasmonic tweezer is theoretically proposed by using the Au nanobowtie and S i O 2 microsphere. The finite-difference time-domain simulation is used to study the influence of the size of the S i O 2 microsphere and the S i O 2 hemisphere in polydimethylsiloxane on the optical potential well. The simulation results show that the electric field intensity of the structure is increased by 6 times compared with the Au nanobowtie structure, and the gradient force and the trapping potential are also significantly improved.
- Published
- 2021
50. A Mobile and Self‐Powered Micro‐Flow Pump Based on Triboelectricity Driven Electroosmosis
- Author
-
Lingjun Zhang, Yingzhou Huang, Hengyu Guo, Jianfeng Sun, Zhongjie Li, Qian Tang, Yan Peng, Chenguo Hu, Jie Chen, and Zhong Lin Wang
- Subjects
Materials science ,business.industry ,Mechanical Engineering ,Microfluidics ,Flow (psychology) ,Nanogenerator ,Electroosmotic pump ,Software portability ,Mechanics of Materials ,Electric field ,Optoelectronics ,General Materials Science ,Joule heating ,business ,Triboelectric effect - Abstract
Electroosmotic pumps have been widely used in microfluidic systems. However, traditional high-voltage (HV)-sources are bulky in size and induce numerous accessional reactions, which largely reduce the system's portability and efficiency. Herein, a motion-controlled, highly efficient micro-flow pump based on triboelectricity driven electroosmosis is reported. Utilizing the triboelectric nanogenerator (TENG), a strong electric field can be formed between two electrodes in the microfluidic channel with an electric double layer, thus driving the controllable electroosmotic flow by biomechanical movements. The performance and operation mechanism of this triboelectric electroosmotic pump (TEOP) is systematically studied and analyzed using a basic free-standing mode TENG. The TEOP produces ≈600 nL min-1 micro-flow with a Joule heat down to 1.76 J cm-3 nL-1 compared with ≈50 nL min-1 and 8.12 J cm-3 nL-1 for an HV-source. The advantages of economy, efficiency, portability, and safety render the TEOP a more conducive option to achieve wider applications in motion-activated micro/nanofluidic transportation and manipulation.
- Published
- 2021
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