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353 results on '"Liu, Ruina"'

65. Controllable Production of Micro-nanoscale Metal-Organic Frameworks Coatings on Cotton Fabric for Sensing Cu2+

Author

Xingfang Xiao, Liu Ruina, Lipei Ren, Yawei Zhang, Weilin Xu, Qian Zhang, and Shujun Wang

Subjects
Materials science, Fabrication, Polymers and Plastics, General Chemical Engineering, Metal ions in aqueous solution, chemistry.chemical_element, Substrate (chemistry), 02 engineering and technology, General Chemistry, 010402 general chemistry, 021001 nanoscience & nanotechnology, Hot pressing, 01 natural sciences, 0104 chemical sciences, Chemical engineering, chemistry, Metal-organic framework, 0210 nano-technology, Luminescence, Europium, Nanoscopic scale
Abstract

Luminescent lanthanide metal-organic frameworks (ln-MOFs) is a promising materials for sensing. However, seeking ideal method to scale up in mass production and can be uniform on flexible substrate is still a great challenge. In this study, a novel and efficient process was employed for the fabrication of flexible and environmental copper ion-sensing materials using cotton fabric as a substrate. The micro-nanoscale Europium metal-organic frameworks (Eu-MOFs) was prepared through adding blocking reagent, and then cotton fabric was coated with the Eu-MOFs by hot pressing. The results show that controllable dense micro-nanoscale Eu-MOFs film was coated on the cotton fabric with different dipping and hot pressing times. The method is fast, simple, low-cost and suitable for production. The Eu-MOFs coated cotton fabric exhibits good photoluminescent properties. The selective sensing ability of Eu-MOFs coated fabric for Cu2+ over many other metal ions (K+, Cd2+, Ca2+, Pb2+, Na+, Zn2+, Ni2+, Mg2+, Al3+ and Co2+) is verified by emission spectra, and by the fact that the fluorescence intensity of the fabric significantly decreased with an increase in the concentration of Cu2+ (10−6—10−1 mol/L). This method provides a new path for the controllable production of MOFs-coated functional textiles for different applications, such as anti-counterfeiting, UV-protection, superhydrophobic, and sensing materials in the textile industry.

Published
2020

69. Paenibacillus tianjinensis sp. nov., isolated from corridor air

Author

Liu, Hongxiang, primary, Lu, Lijing, additional, Wang, Sijin, additional, Yu, Meng, additional, Cao, Xiaoyun, additional, Tang, Sufang, additional, Bai, Haijiao, additional, Ma, Shihong, additional, Liu, Ruina, additional, Liu, Rui, additional, Jiang, Xiaoying, additional, Yao, Su, additional, and Shao, Jianqiang, additional

Published
2021
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85. Predicting postmortem interval based on microbial community sequences and machine learning algorithms

Author

Liu, Ruina, primary, Gu, Yuexi, additional, Shen, Mingwang, additional, Li, Huan, additional, Zhang, Kai, additional, Wang, Qi, additional, Wei, Xin, additional, Zhang, Haohui, additional, Wu, Di, additional, Yu, Kai, additional, Cai, Wumin, additional, Wang, Gongji, additional, Zhang, Siruo, additional, Sun, Qinru, additional, Huang, Ping, additional, and Wang, Zhenyuan, additional

Published
2020
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86. Efficient All‐Optical Plasmonic Modulators with Atomically Thin Van Der Waals Heterostructures

Author

Guo, Xiangdong, primary, Liu, Ruina, additional, Hu, Debo, additional, Hu, Hai, additional, Wei, Zheng, additional, Wang, Rui, additional, Dai, Yunyun, additional, Cheng, Yang, additional, Chen, Ke, additional, Liu, Kaihui, additional, Zhang, Guangyu, additional, Zhu, Xing, additional, Sun, Zhipei, additional, Yang, Xiaoxia, additional, and Dai, Qing, additional

Published
2020
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89. Study of graphene plasmons in graphene–MoS2heterostructures for optoelectronic integrated devices

Author

Xiaoxia Yang, Luojun Du, Guangyu Zhang, Hua Yu, Baoxin Liao, Hai Hu, Xiangdong Guo, Qing Dai, Liu Ruina, and Debo Hu

Subjects
Materials science, Condensed Matter::Other, business.industry, Graphene, Doping, Physics::Optics, Heterojunction, 02 engineering and technology, Dielectric, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, 0104 chemical sciences, law.invention, Condensed Matter::Materials Science, Semiconductor, law, Monolayer, Physics::Atomic and Molecular Clusters, Optoelectronics, General Materials Science, 0210 nano-technology, business, Plasmon, Graphene nanoribbons
Abstract

The performance of electronic circuits is becoming limited by on-chip digital information transmission. Graphene plasmons with ultra-high confinement and low damping rates offer an effective solution to this problem as they allow for the implementation of optical interconnects. However, direct contact with the semiconductor always deteriorates the plasmonic properties due to large damping of the plasmon in the semiconductor. Here, we studied graphene plasmons in heterostructures of graphene and monolayer MoS2 which represents a promising semiconductor for next-generation electronic devices. The graphene plasmons in the heterostructures were systematically evaluated in terms of their resonance frequency, intensity, lifetime and electrical tunability and were found to keep their main characteristics. Experimental results exhibited both a redshift in the plasmon frequencies and a decrease in the resonance intensity for both graphene/MoS2 and MoS2/graphene devices when compared with graphene devices at the same gate bias. These results could be attributed to changes in the dielectric constant and effective doping of graphene. Furthermore, the conductivity saturation on the electron branch in the back-gated graphene/MoS2 device cancelled the electron plasmons. These findings demonstrate that electrically tunable graphene plasmons can be realized in contact with semiconducting MoS2. Our results provide a platform for the investigation of the integration of semiconductor-based electronic and optoelectronic devices with plasmonic devices through van der Waals heterostructures.

Published
2017

90. Hydrogen production from herbal wastewater via anaerobic fermentation with diatomite‐immobilized sludge.

Author

Liu, Ruina, Lin, Youwei, Xu, Gongdi, and Li, Yongfeng

Subjects
*HYDROGEN production, *INTERSTITIAL hydrogen generation, *SEWAGE, *FERMENTATION, *CHEMICAL oxygen demand, *UPFLOW anaerobic sludge blanket reactors
Abstract

The feasibility and performance of continuous hydrogen production from herbal wastewater via anaerobic fermentation was investigated at different organic loading rates (OLRs) (from 12 to 96 kg chemical oxygen demand [COD]·L−1·day−1) in diatomite‐immobilized sludge reactor and suspended sludge reactor. Results indicated that the diatomite‐immobilized sludge reactor presented more efficient and stable performance than suspended sludge reactor in terms of hydrogen production rate. In diatomite‐immobilized sludge reactor, the highest hydrogen production rate of 11.17 ± 0.45 mmol·L−1·h−1 was achieved at the optimum OLR of 72‐kg COD·L−1·day−1. The metabolic route of acetate acid and butyrate acid production at low OLR (from 12‐ to 40‐kg COD·L−1·day−1) was modified to be ethanol production by an increase in OLR to 56 and 72‐kg COD·L−1·day−1, which was reflected by the distribution of bacterial community. The maximum energy recovery efficiency by dual production of hydrogen and ethanol was determined to be 31.2 kJ·L−1·h−1 at OLR of 72‐kg COD·L−1·day−1. [ABSTRACT FROM AUTHOR]

Published
2022
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91. Efficient All-Optical Plasmonic Modulators with Atomically Thin Van Der Waals Heterostructures

Author

Ke Chen, Hai Hu, Kaihui Liu, Xing Zhu, Guangyu Zhang, Rui Wang, Liu Ruina, Xiaoxia Yang, Qing Dai, Yang Cheng, Zhipei Sun, Yunyun Dai, Zheng Wei, Debo Hu, Xiangdong Guo, National Center for Nanoscience and Technology Beijing, Chinese Academy of Sciences, Zhipei Sun Group, Peking University, Centre of Excellence in Quantum Technology, QTF, Department of Electronics and Nanoengineering, Aalto-yliopisto, and Aalto University

Subjects
Materials science, Orders of magnitude (temperature), Physics::Optics, 02 engineering and technology, 010402 general chemistry, 01 natural sciences, law.invention, law, all-optical plasmonic modulators, graphene plasmon, Physics::Atomic and Molecular Clusters, General Materials Science, Plasmon, Graphene, business.industry, Mechanical Engineering, Heterojunction, 021001 nanoscience & nanotechnology, 2D materials, 0104 chemical sciences, Light intensity, Mechanics of Materials, Modulation, Optoelectronics, van der Waals heterostructures, 0210 nano-technology, business, Ultrashort pulse, Light field
Abstract

openaire: EC/H2020/820423/EU//S2QUIP | openaire: EC/H2020/834742/EU//ATOP All-optical modulators are attracting significant attention due to their intrinsic perspective on high-speed, low-loss, and broadband performance, which are promising to replace their electrical counterparts for future information communication technology. However, high-power consumption and large footprint remain obstacles for the prevailing nonlinear optical methods due to the weak photon–photon interaction. Here, efficient all-optical mid-infrared plasmonic waveguide and free-space modulators in atomically thin graphene-MoS2 heterostructures based on the ultrafast and efficient doping of graphene with the photogenerated carrier in the monolayer MoS2 are reported. Plasmonic modulation of 44 cm−1 is demonstrated by an LED with light intensity down to 0.15 mW cm−2, which is four orders of magnitude smaller than the prevailing graphene nonlinear all-optical modulators (≈103 mW cm−2). The ultrafast carrier transfer and recombination time of photogenerated carriers in the heterostructure may achieve ultrafast modulation of the graphene plasmon. The demonstration of the efficient all-optical mid-infrared plasmonic modulators, with chip-scale integrability and deep-sub wavelength light field confinement derived from the van der Waals heterostructures, may be an important step toward on-chip all-optical devices.

Published
2019

92. The Novel Interplay between Commensal Gut Bacteria and Metabolites in Diet-Induced Hyperlipidemic Rats Treated with Simvastatin

Author

Zhang, Siruo, Yuan, Lu, Li, Huan, Han, Lei, Jing, Wanghui, Wu, Xiaokang, Ullah, Shakir, Liu, Ruina, Wu, Yonghong, and Xu, Jiru

Abstract

Hyperlipidemia is one kind of metabolic syndrome for which the treatment commonly includes simvastatin (SV). Individuals vary widely in statin responses, and growing evidence implicates gut microbiome involvement in this variability. However, the associated molecular mechanisms between metabolic improvement and microbiota composition following SV treatment are still not fully understood. In this study, combinatory approaches using ultrahigh-performance liquid chromatography coupled with hybrid triple quadrupole time-of-flight mass spectrometry (UHPLC-Q-TOF MS/MS)-based metabolomic profiling, PCR-denaturing gradient gel electrophoresis (PCR-DGGE), quantitative PCR (qPCR), and 16S rRNA gene sequencing-based gut microbiota profiling were performed to investigate the interplay of endogenous metabolites and the gut microbiota related to SV treatment. A total of 6 key differential endogenous metabolites were identified that affect the metabolism of amino acids (phenylalanine and tyrosine), unsaturated fatty acids (linoleic acid and 9-hydroxyoctadecadienoic acid (9-HODE)), and the functions of gut microbial metabolism. Moreover, a total of 22 differentially abundant taxa were obtained following SV treatment. Three bacterial taxa were identified to be involved in SV treatment, namely, Bacteroidaceae, Prevotellaceae, and Porphyromonadaceae. These findings suggested that the phenylalanine and tyrosine-associated amino acid metabolism pathways, as well as the linoleic acid and 9-HODE-associated unsaturated fatty acid metabolism pathways, which are involved in gut flora interactions, might be potential therapeutic targets for improvement in SV hypolipidemic efficacy. The mass spectrometric data have been deposited to MassIVE (https://massive.ucsd.edu/ProteoSAFe/static/massive.jsp). Username: MSV000087842_reviewer. Password: hardworkingzsr.

Published
2022
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93. Far-Field Spectroscopy and Near-Field Optical Imaging of Coupled Plasmon-Phonon Polaritons in 2D van der Waals Heterostructures

Author

Hai Hu, Debo Hu, Shunping Zhang, Liu Ruina, Xiaoxia Yang, Qing Dai, Jianing Chen, Mengtao Sun, Zhipei Sun, and Feng Zhai

Subjects
Materials science, Phonon, Van der Waals heterostructures, Plasmon-phonon polaritons, Physics::Optics, Near and far field, 02 engineering and technology, 010402 general chemistry, 7. Clean energy, 01 natural sciences, law.invention, law, Physics::Atomic and Molecular Clusters, Polariton, General Materials Science, Spectroscopy, Plasmon, ta114, Condensed matter physics, Graphene, Mechanical Engineering, 021001 nanoscience & nanotechnology, 0104 chemical sciences, Transverse plane, Monolayer h-BN, Mechanics of Materials, Group velocity, 0210 nano-technology
Abstract

A new hybridized plasmon-phonon polariton mode in graphene/h-BN van der Waals heterostructures is presented, featuring the ultrahigh field confinement characteristic of the graphene plasmon and the long lifetime property of the h-BN transverse optical phonon. This enables an ultralong hybrid plasmon lifetime of up to 1.6 ps (with ultrahigh mode confinement up to >l0(2)/7000 and ultrasmall group velocity down to 0.001c, where c is the speed of light in vacuum), superior to any localized plasmon ever demonstrated.

Published
2016

100. Simultaneous detection of four flavonoids and two alkaloids in rat plasma by LC–MS/MS and its application to a comparative study of the pharmacokinetics between Abri Herba and Abri mollis Herba extract after oral administration

Author

Liu, Ruina, primary, Yan, Wenying, additional, Han, Qingjie, additional, Lv, Tao, additional, Wang, Xin, additional, Liu, Xiaochen, additional, Fan, Xueyan, additional, Meng, Caifeng, additional, and Wang, Chunying, additional

Published
2019
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