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Tribotronic transistor sensor for enhanced hydrogen detection

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Nano Research 2017年第11期10卷 3857-3864页

作者： Yaokun Pang Libo Chen Guofeng Hu Jianjun Luo Zhiwei Yang Chi Zhang Zhong Lin Wang Beijing Institute of Nanoenergy and Nanosystems Chinese Academy of Sciences Beijing 100083 China National Center for Nanoscience and Technology(NCNST) Beijing 100190 China University of Chinese Academy of Sciences Beijing 100049 China School of Material Science and Engineering Georgia Institute of Technology Atlanta Georgia 30332 USA

hydrogen detection with a high sensitivity is necessary for preventing potential explosions and *** this study,a novel ZnO tribotronic transistor is developed by coupling a ZnO field effect transistor （FET） and triboelectric nanogenerator in free-standing mode and is used as a sensor for hydrogen detection at room *** modulated performances of the hydrogen sensor are demonstrated by investigating its output characteristics at different sliding distances and hydrogen *** applying an external mechanical force to the device for sliding electrification,the detection sensitivity of the ZnO tribotronic transistor sensor is improved,with a significant enhancement achieved in output current by 62 times at 500 ppm hydrogen and 1 V bias *** study demonstrates an extension of the applications of emerging tribotronics for gas detection and a prospective approach to improve the performance of the hydrogen sensor via human-interfacing.

关键词： tribotronics triboelectric nanogenerator ZnO hydrogen detection sensitivity

Realization of palladium-based optomechanical cantilever hydrogen sensor

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Microsystems & Nanoengineering 2017年第1期3卷 367-372页

作者： Steven J.McKeown Xiaozhen Wang Xin Yu Lynford L.Goddard Photonic Systems Laboratory Department of Electrical and Computer EngineeringMicro and Nanotechnology LabUniversity of Illinois at Urbana-Champaign208 North Wright StreetMNTL 2254UrbanaIL 61801USA

hydrogen has attracted attention as an alternative fuel source and as an energy storage ***,the flammability of hydrogen at low concentrations makes it a safety ***,gas concentration measurements are a vital safety *** we present the experimental realization of a palladium thin film cantilever optomechanical hydrogen gas *** measured the instantaneous shape of the cantilever to nanometer-level accuracy using diffraction phase ***,we were able to quantify changes in the curvature of the cantilever as a function of hydrogen concentration and observed that the sensor’s minimum detection limit was well below the 250 *** of our test *** the change in curvature versus the hydrogen curve for calibration,we accurately determined the hydrogen concentrations for a random sequence of *** addition,we calculated the change in film stress as a function of hydrogen concentration and observed a greater sensitivity at lower concentrations.

关键词： hydrogen detection imaging and sensing interference microscopy optomechanics optical sensors surface dynamics

Design and realization of 3D printed fiber-tip microcantilever probes applied to hydrogen sensing

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Light(Advanced Manufacturing) 2022年第1期3卷 71-81页

作者： Changrui Liao Cong Xiong Jinlai Zhao Mengqiang Zou Yuanyuan Zhao Bozhe Li Peng Ji Zhihao Cai Zongsong Gan Ying Wang Yiping Wang Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education/Guangdong Province College of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen 518060China Shenzhen Key Laboratory of Photonic Devices and Sensing Systems for Internet of Things Guangdong and Hong Kong Joint Research Centre for Optical Fibre SensorsShenzhen UniversityShenzhen 518060China College of Materials Science and Engineering Shenzhen Key Laboratory of Polymer Science and TechnologyGuangdong Research Center for Interfacial Engineering of Functional MaterialsShenzhen 518060China Wuhan National Laboratory for Optoelectronics(WNLO) Huazhong University of Science and Technology(HUST)Wuhan 430074China Shenzhen Huazhong University of Science and Technology Research Institute Shenzhen518057China.

Cantilevers in microelectromechanical systems have the advantages of non-labeling,real-time detection,positioning,and *** solid,rectangular hollow,and triangular microcantilevers were fabricated on an optical fiber tip via two-photon *** mechanical properties were characterized using finite element *** the microcantilever with a palladium film enabled high sensitivity and rapid hydrogen *** shape of the cantilever determines the sensitivity,whereas the thickness of the palladium film determines the response *** microelectromechanical systems can be realized via polymerization combined with optical fibers.

关键词： two-photon polymerization optical fiber sensor Fabry-Pérot interferometer microcantilever probe hydrogen detection

Optical fiber hydrogen sensor using metasurfaces composed of palladium

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Chinese Optics Letters 2022年第5期20卷 43-47页

作者： Shunshuo Cai Wanhan Hu Yiman Liu Juan Ning Sixuan Feng Chao Jin Lingling Huang Xin Li Beijing Engineering Research Center of Mixed Reality and Advanced Display School of Optics and PhotonicsBeijing Institute of TechnologyBeijing 100081China School of Computer Science and Technology Beijing Institute of TechnologyBeijing 100081China

Palladium-based hydrogen sensors have been typically studied due to the dielectric function that changes with the hydrogen concentration. However, the development of a reliable, integral, and widely applicable hydrogen sensor requires a simple readout mechanism and an optimization of the fast detection of hydrogen. In this work, optical fiber hydrogen sensing platforms are developed using an optimized metasurface, which consists of a layer of palladium nanoantennas array suspended above a gold mirror layer. Since the optical properties of these palladium nanoantennas differ from the traditional palladium films, a high reflectance difference can be achieved when the sensor based on the metasurface is exposed to the hydrogen atmosphere. Finally, the optimized reflectance difference ΔR of ~0.28 can be obtained when the sensor is exposed in the presence of hydrogen. It is demonstrated that this integrated system architecture with an optimized palladium-based metasurface and a simple optical fiber readout system provides a compact and light platform for hydrogen detection in various working environments.

关键词： hydrogen detection metasurface palladium optical fiber sensor