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Your search keyword '"Dong, Linxi"' showing total 48 results
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48 results on '"Dong, Linxi"'

22. Noise Mitigation Strategies for Silicon-Based Active Neural Optrode

Author

Wang, Minghao, primary, Jin, Minyi, additional, Wang, Longchun, additional, Fan, Ye, additional, Xu, Jiahui, additional, Shang, Siyan, additional, Ni, Chuner, additional, Hu, Yili, additional, Cheng, Yuhua, additional, Dong, Linxi, additional, Ji, Bowen, additional, Liu, Jingquan, additional, and Wang, Gaofeng, additional

Published
2023
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24. CVD growth of large-area monolayer WS2 film on sapphire through tuning substrate environment and its application for high-sensitive strain sensor

Author

Yang, Weihuang, primary, Mu, Yuanbin, additional, Chen, Xiangshuo, additional, Jin, Ningjing, additional, Song, Jiahao, additional, Chen, Jiajun, additional, Dong, Linxi, additional, Liu, Chaoran, additional, Xuan, Weipeng, additional, Zhou, Changjie, additional, Cong, Chunxiao, additional, Shang, Jingzhi, additional, He, Silin, additional, Wang, Gaofeng, additional, and Li, Jing, additional

Published
2023
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25. A Micro-Airflow Sensor System Enabled by Triboelectric Nanogenerator for Lab Safety and Human–Computer Interaction

Author

Wang, Xucong, Li, Yingzhe, Liu, Chaoran, You, Weilong, Zou, Haiyang, Yue, Chenxi, Cheng, Jiagen, Yang, Weihuang, Li, Shaoxian, Lazarouk, Serguei, Labunov, Vladimir, Wang, Gaofeng, Lin, Hongjian, and Dong, Linxi

Abstract

The airflow sensor enabled by triboelectric nanogenerator (TENG) is significant for intelligent lab safety and human–computer interaction applications. However, the reported airflow/wind sensor focuses on enhancing the sensing materials and structures, lack of high resolution, and smart signal analysis. Herein, we present a self-powered micro-airflow sensor and its artificial intelligence (AI) system, applied for lab safety and human–computer interaction. The as-fabricated sensor has a high sensitivity of $0.6258~\mu \text{A}$ /(m/s) and a linearity of 0.9968. Attributing to the Venturi effect, the minimum detection velocity of the sensor is 0.13 m/s. Given the sensor performance, we develop a real-time pipeline gas leak location system with an AI user interface, which achieves a potential low detect error $\le 2.9$ cm. In addition, we successfully explore other applications, including human exit–entry counting, ventilation alarm, and breath-based smart aid communication. Above all, the airflow sensor exhibits tremendous potential in the AI and Internet of Things.

Published
2024
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28. A Wearable and Flexible Photoplethysmogram Sensor Patch for Cuffless Blood Pressure Estimation With High Accuracy

Author

Liu, Wenjing, primary, Cheng, Jiagen, additional, Wu, Zutang, additional, Li, Jin, additional, Shi, Wei, additional, Yang, Weihuang, additional, Jin, Ningjing, additional, Mu, Yuanbin, additional, Weng, Binhui, additional, Wu, Jiashu, additional, Hao, Dandan, additional, Liu, Chaoran, additional, Wang, Zhipeng, additional, Li, Gang, additional, and Dong, Linxi, additional

Published
2022
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30. A Fully Integrated Flexible Electronic System With Highly Sensitive MWCNTs Piezoresistive Array Sensors for Pressure Monitoring

Author

Cheng, Jiagen, primary, Mu, Yuanbin, additional, Liu, Chaoran, additional, Yang, Weihuang, additional, Liu, Wenjing, additional, Wang, Huanze, additional, Wu, Jiashu, additional, Hou, Fujing, additional, Hao, Dandan, additional, Cheng, Lian, additional, Weng, Binhui, additional, Chen, Ying, additional, and Dong, Linxi, additional

Published
2022
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31. Design of flexible resistance sensor based on mesh convex microstructure

Author

jing xu, Jingxuan Ma, Jiadi Lian, YiHong Liao, Luwen Wang, Dong Linxi, and Hui SUN

Subjects
Acoustics and Ultrasonics, Condensed Matter Physics, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials
Abstract

To solve the problems of large volume and poor flexibility of the traditional pressure sensor prepared by rigid materials, a flexible pressure resistance sensor with mesh convex platform microstructure is prepared by using PDMS as a substrate and graphene as a conductive functional layer. The preparation process of the conductive layer and the substrate of the sensor are optimized. The effect of the concentration of graphene and thinckness of PDMS on the sensor’s sensitivity are investigated. The experimental results show that the addition of polyurethane to graphene and the hydrophilic treatment of the PDMS can improve the stability of the sensor. Excessive graphene blocks the microstructural gaps resulting in reduce sensitivity. The thicker the PDMS, the smaller the microstructural deformation, resulting in lower sensitivity. Based on the theoretical basis of elastic mechanics, the calculated results consistent with the experimental results. Finally, the performance of PDMS microstructure sensor with thickness of 0.2mm is tested. The sensor has a high linear sensitivity (0.152kPa-1) and a wide linear dynamic response range (0-4kPa), along with a fast response time of 83ms. The sensor is fixed to the finger for bending test and shows that the sensor is able to detect human physiological activity.

Published
2022

32. A Review of Transition Metal Dichalcogenides-Based Biosensors

Author

Sun, Hongyu, primary, Li, Dujuan, additional, Yue, Xiaojie, additional, Hong, Rui, additional, Yang, Weihuang, additional, Liu, Chaoran, additional, Xu, Hong, additional, Lu, Jun, additional, Dong, Linxi, additional, Wang, Gaofeng, additional, and Li, Dongyang, additional

Published
2022
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33. CVD growth of large-area monolayer WS2 film on sapphire through tuning substrate environment and its application for high-sensitive strain sensor.

Author

Yang, Weihuang, Mu, Yuanbin, Chen, Xiangshuo, Jin, Ningjing, Song, Jiahao, Chen, Jiajun, Dong, Linxi, Liu, Chaoran, Xuan, Weipeng, Zhou, Changjie, Cong, Chunxiao, Shang, Jingzhi, He, Silin, Wang, Gaofeng, and Li, Jing

Subjects
STRAIN sensors, STRAIN gages, SAPPHIRES, CHEMICAL vapor deposition, MONOMOLECULAR films, FIELD-effect transistors, ORGANIC field-effect transistors
Abstract

Large-area, continuous monolayer WS2 exhibits great potential for future micro-nanodevice applications due to its special electrical properties and mechanical flexibility. In this work, the front opening quartz boat is used to increase the amount of sulfur (S) vapor under the sapphire substrate, which is critical for achieving large-area films during the chemical vapor deposition processes. COMSOL simulations reveal that the front opening quartz boat will significantly introduce gas distribute under the sapphire substrate. Moreover, the gas velocity and height of substrate away from the tube bottom will also affect the substrate temperature. By carefully optimizing the gas velocity, temperature, and height of substrate away from the tube bottom, a large-scale continues monolayered WS2 film was achieved. Field-effect transistor based on the as-grown monolayer WS2 showed a mobility of 3.76 cm2V−1 s−1 and ON/OFF ratio of 106. In addition, a flexible WS2/PEN strain sensor with a gauge factor of 306 was fabricated, showing great potential for applications in wearable biosensors, health monitoring, and human–computer interaction. [ABSTRACT FROM AUTHOR]

Published
2023
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38. Fully Printed Flexible Capacitive Array Tactile Force Sensors with Tunable Sensitivity and Low Crosstalk for Monitoring Human Motion and Sound Signals

Author

Mu, Yuanbin, primary, Cheng, Jiagen, additional, Yang, Weihuang, additional, Wu, Xuanyi, additional, Jin, Ningjing, additional, Liu, Wenjing, additional, Hou, Fujing, additional, Wu, Jiashu, additional, Wang, Huanze, additional, Weng, Binhui, additional, Cheng, Lian, additional, Hao, Dandan, additional, Liu, Chaoran, additional, Zhao, Libo, additional, and Dong, Linxi, additional

Published
2022
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43. A Novel Mathematical Method for Calculating the LCL-Type Matching of Ultrasonic Transducer for Liquefaction Treatment

Author

Guo, Nanxiang, Luo, Xiqi, Yan, Haixia, Liu, Chaoran, Yang, Weihuang, Zhao, Libo, and Dong, Linxi

Abstract

This article presents a novel mathematical method for calculating the inductor–capacitor–inductor (LCL)-type matching of ultrasonic transducer used in liquefaction treatment. When the ultrasonic transducer is used for liquefaction treatment, the load impedance changes drastically. With traditional inductor–capacitor (LC) matching circuits, the driving voltage of the transducer may become very high due to the sudden increase of the load impedance, especially at the startup. This ultrahigh voltage may cause damage to the transducer and generator. The LCL -type matching circuit calculated with the proposed mathematical method can keep the transducer voltage relatively stable no matter how the load changes. Since the variation of the load will lead to a slight change in the resonant frequency and the frequency tracking speed is limited by the software of the generator, the transducer may temporarily lose locking, which also causes the transducer voltage to fluctuate. This voltage fluctuation can be minimized by the LCL matching circuit provided in this article, and then, the LCL matching is quiet suitable for ultrasonic liquefaction treatment.

Published
2023
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45. High‐precision dielectric sensor system based on balanced CSRR‐SIW resonators.

Author

Jiang, Hao, Qi, Xiaokang, Wang, Quan, Xu, Kuiwen, Chen, Shichang, Wu, Liang, Zhu, Fang, Zhao, Wen‐Sheng, Dong, Linxi, Ran, Lixin, and Wang, Gaofeng

Subjects
RESONATORS, DIELECTRIC measurements, ELECTRIC field effects, DATA acquisition systems, MEMS resonators, DIELECTRICS, PERMITTIVITY measurement, ELECTROMAGNETIC interference
Abstract

A high‐precision differential microwave dielectric sensor system based on a pair of CSRR‐SIW resonators is introduced. The proposed method consists of four parts: the frequency‐sweeping signal source, the balanced sensor based on CSRR‐SIW, the RMS power detector, and the data acquisition system. Without a vector network analyzer (VNA) and other instruments, the electromagnetic properties of materials can be measured conveniently with the proposed method. In this work, two CSRR resonators inside SIW cavities are used as the balanced RF sensing components, one for measurement and the other for reference. In virtue of the electric field concentration effect of the CSRR and the high Q factor of SIW cavity, the proposed sensor achieves high sensitivity to material under test (MUT), with high isolation between the balanced resonators and strong capability of suppressing the electromagnetic interferences from the external environment. The resonating frequency of the balanced microwave resonator under no‐load condition is 1.587 GHz. With balanced sensor configuration, interferences from the external environment and fabrication errors for the single‐resonator‐based system can be filtered out and compensated automatically, and thus high precision of the dielectric constant measurement can be achieved. The experiment results of proposed differential dielectric sensor system validate that the measurement accuracy of the dielectric constant can reach an excellent level with a relative measurement error below 0.1%. [ABSTRACT FROM AUTHOR]

Published
2021
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46. An electrochemical biosensor based on few-layer MoS2nanosheets for highly sensitive detection of tumor marker ctDNAElectronic supplementary information (ESI) available. See https://doi.org/10.1039/d2ay00467d

Author

Cui, Zhilian, Li, Dujuan, Yang, Weihuang, Fan, Kai, Liu, Hongying, Wen, Fei, Li, Lili, Dong, Linxi, Wang, Gaofeng, and Wu, Wei

Abstract

An electrochemical biosensor based on few-layer molybdenum disulfide (MoS2) nanosheets was fabricated for the highly sensitive detection of tumor marker circulating tumor DNA (ctDNA) in this paper. The MoS2nanosheets with few layers were prepared by the shear stripping. Compared with the mechanical stripping method and the lithium ion intercalation method, this method is simpler to operate, and the prepared MoS2nanosheets had good electrochemical activity. The biosensing platform was fabricated based on the discriminative affinity of MoS2nanosheets towards single-stranded DNA (ssDNA) and double-stranded DNA (dsDNA). Methylene blue (MB) was used as the signal molecule. The results showed that the detection of ctDNA by this sensor showed an excellent linear relationship in the concentration range of 1.0 × 10−7M to 1.0 × 10−16M, and the detection limit was 2.5 × 10−18M. In addition, this sensor exhibited outstanding stability and specificity. This strategy provides an alternative approach for ctDNA detection and an effective sensing strategy for future in vitrocancer diagnosis by label-free detection.

Published
2022
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47. CVD growth of large-area monolayer WS2film on sapphire through tuning substrate environment and its application for high-sensitive strain sensor

Author

Yang, Weihuang, Mu, Yuanbin, Chen, Xiangshuo, Jin, Ningjing, Song, Jiahao, Chen, Jiajun, Dong, Linxi, Liu, Chaoran, Xuan, Weipeng, Zhou, Changjie, Cong, Chunxiao, Shang, Jingzhi, He, Silin, Wang, Gaofeng, and Li, Jing

Abstract

Large-area, continuous monolayer WS2exhibits great potential for future micro-nanodevice applications due to its special electrical properties and mechanical flexibility. In this work, the front opening quartz boat is used to increase the amount of sulfur (S) vapor under the sapphire substrate, which is critical for achieving large-area films during the chemical vapor deposition processes. COMSOL simulations reveal that the front opening quartz boat will significantly introduce gas distribute under the sapphire substrate. Moreover, the gas velocity and height of substrate away from the tube bottom will also affect the substrate temperature. By carefully optimizing the gas velocity, temperature, and height of substrate away from the tube bottom, a large-scale continues monolayered WS2film was achieved. Field-effect transistor based on the as-grown monolayer WS2showed a mobility of 3.76 cm2V−1s−1and ON/OFF ratio of 106. In addition, a flexible WS2/PEN strain sensor with a gauge factor of 306 was fabricated, showing great potential for applications in wearable biosensors, health monitoring, and human–computer interaction.

Published
2023
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48. An electrochemical biosensor based on few-layer MoS 2 nanosheets for highly sensitive detection of tumor marker ctDNA.

Author

Cui Z, Li D, Yang W, Fan K, Liu H, Wen F, Li L, Dong L, Wang G, and Wu W

Subjects
Biomarkers, Tumor, DNA, DNA, Single-Stranded, Electrochemical Techniques methods, Limit of Detection, Molybdenum chemistry, Biosensing Techniques methods, Circulating Tumor DNA
Abstract

An electrochemical biosensor based on few-layer molybdenum disulfide (MoS 2 ) nanosheets was fabricated for the highly sensitive detection of tumor marker circulating tumor DNA (ctDNA) in this paper. The MoS 2 nanosheets with few layers were prepared by the shear stripping. Compared with the mechanical stripping method and the lithium ion intercalation method, this method is simpler to operate, and the prepared MoS 2 nanosheets had good electrochemical activity. The biosensing platform was fabricated based on the discriminative affinity of MoS 2 nanosheets towards single-stranded DNA (ssDNA) and double-stranded DNA (dsDNA). Methylene blue (MB) was used as the signal molecule. The results showed that the detection of ctDNA by this sensor showed an excellent linear relationship in the concentration range of 1.0 × 10 -7 M to 1.0 × 10 -16 M, and the detection limit was 2.5 × 10 -18 M. In addition, this sensor exhibited outstanding stability and specificity. This strategy provides an alternative approach for ctDNA detection and an effective sensing strategy for future in vitro cancer diagnosis by label-free detection.

Published
2022
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