The Experts below are selected from a list of 75270 Experts worldwide ranked by ideXlab platform
Shurong Wang - One of the best experts on this subject based on the ideXlab platform.
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zno nanorod Gas Sensor for ethanol detection
Sensors and Actuators B-chemical, 2012Co-Authors: Liwei Wang, Shoumin Zhang, Yanfei Kang, Weiping Huang, Shurong WangAbstract:Abstract ZnO nanorods were fabricated by a simple low-temperature hydrothermal process in high yield (about 85%), starting with Zn(OH) 4 2− aqueous solution in the presence of CTAB, the CTAB serving as a structure director, and no calcination process was needed. The morphology and crystal structure of the prepared ZnO nanorods were characterized by X-ray diffraction (XRD), Scanning electron microscope (SEM) and Transmission electron microscope (TEM). The ZnO nanorods were then used to construct a Gas Sensor for ethanol detection at different operating temperature. The as-prepared ZnO nanorod Gas Sensor exhibited a high, reversible and fast response to ethanol, indicating its potential application as a Gas Sensor to detect ethanol.
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ZnO nanorod Gas Sensor for ethanol detection
Sensors and Actuators B: Chemical, 2012Co-Authors: Liwei Wang, Shoumin Zhang, Xianghong Liu, Yanfei Kang, Weiping Huang, Shurong WangAbstract:ZnO nanorods were fabricated by a simple low-temperature hydrothermal process in high yield (about 85%), starting with Zn(OH)42-aqueous solution in the presence of CTAB, the CTAB serving as a structure director, and no calcination process was needed. The morphology and crystal structure of the prepared ZnO nanorods were characterized by X-ray diffraction (XRD), Scanning electron microscope (SEM) and Transmission electron microscope (TEM). The ZnO nanorods were then used to construct a Gas Sensor for ethanol detection at different operating temperature. The as-prepared ZnO nanorod Gas Sensor exhibited a high, reversible and fast response to ethanol, indicating its potential application as a Gas Sensor to detect ethanol. © 2011 Elsevier B.V. All rights reserved.
Liwei Wang - One of the best experts on this subject based on the ideXlab platform.
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zno nanorod Gas Sensor for ethanol detection
Sensors and Actuators B-chemical, 2012Co-Authors: Liwei Wang, Shoumin Zhang, Yanfei Kang, Weiping Huang, Shurong WangAbstract:Abstract ZnO nanorods were fabricated by a simple low-temperature hydrothermal process in high yield (about 85%), starting with Zn(OH) 4 2− aqueous solution in the presence of CTAB, the CTAB serving as a structure director, and no calcination process was needed. The morphology and crystal structure of the prepared ZnO nanorods were characterized by X-ray diffraction (XRD), Scanning electron microscope (SEM) and Transmission electron microscope (TEM). The ZnO nanorods were then used to construct a Gas Sensor for ethanol detection at different operating temperature. The as-prepared ZnO nanorod Gas Sensor exhibited a high, reversible and fast response to ethanol, indicating its potential application as a Gas Sensor to detect ethanol.
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ZnO nanorod Gas Sensor for ethanol detection
Sensors and Actuators B: Chemical, 2012Co-Authors: Liwei Wang, Shoumin Zhang, Xianghong Liu, Yanfei Kang, Weiping Huang, Shurong WangAbstract:ZnO nanorods were fabricated by a simple low-temperature hydrothermal process in high yield (about 85%), starting with Zn(OH)42-aqueous solution in the presence of CTAB, the CTAB serving as a structure director, and no calcination process was needed. The morphology and crystal structure of the prepared ZnO nanorods were characterized by X-ray diffraction (XRD), Scanning electron microscope (SEM) and Transmission electron microscope (TEM). The ZnO nanorods were then used to construct a Gas Sensor for ethanol detection at different operating temperature. The as-prepared ZnO nanorod Gas Sensor exhibited a high, reversible and fast response to ethanol, indicating its potential application as a Gas Sensor to detect ethanol. © 2011 Elsevier B.V. All rights reserved.
Jacek Szuber - One of the best experts on this subject based on the ideXlab platform.
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Studies of NO2 Gas-Sensing Characteristics of a Novel Room-Temperature Surface-Photovoltage Gas Sensor Device.
Sensors, 2020Co-Authors: Monika Kwoka, Jacek SzuberAbstract:In this work the characteristics of a novel type of room temperature NO2 Gas Sensor device based on the surface photovoltage effect are described. It was shown that for our SPV Gas Sensor device, using porous sputtered ZnO nanostructured thin films as the active Gas sensing electrode material, the basic Gas Sensor characteristics in a toxic NO2 Gas atmosphere are strongly dependent on the target NO2 Gas flow rate. Moreover, it was also confirmed that our SPV Gas Sensor device is able to detect the lowest NO2 relative concentration at the level of 125 ppb, with respect to the commonly assumed signal-to-noise (S/N) ratio, as for the commercial devices.
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A Novel Type Room Temperature Surface Photovoltage Gas Sensor Device
2018Co-Authors: Monika Kwoka, Michał A. Borysiewicz, Pawel Tomkiewicz, Anna Piotrowska, Jacek SzuberAbstract:In this paper a novel type of a highly sensitive Gas Sensor device based on the surface photovoltage effect is described. The developed surface photovoltage Gas Sensor is based on a reverse Kelvin probe approach. As the active Gas sensing electrode the porous ZnO nanostructured thin films are used deposited by the direct current (DC) reactive magnetron sputtering method exhibiting the nanocoral surface morphology combined with an evident surface nonstoichiometry related to the unintentional surface carbon and water vapor contaminations. Among others, the demonstrated SPV Gas Sensor device exhibits a high sensitivity of 1 ppm to NO2 with a signal to noise ratio of about 50 and a fast response time of several seconds under the room temperature conditions.
Chih-hsiung Shen - One of the best experts on this subject based on the ideXlab platform.
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Research on a Highly Sensitive Magnetic-Catalytic CMOS-MEMS Compatible Gas Sensor
IEEE Electron Device Letters, 2014Co-Authors: Chih-hsiung Shen, Shi-ching KeAbstract:This letter proposes a new magnetic-catalytic sensing mechanism designed to increase the sensitivity of a Gas Sensor with mesh-stacked sensing electrodes. Beyond the conventional power dissipation of heating to maintain a certain working temperature, the novel Gas Sensor with a magnetic-catalytic mechanism operates at an ambient temperature, and heating power does not need to be considered. The standard 0.35 μm CMOS process was used to fabricate a Gas Sensor with mesh-stacked electrodes. To prepare the magnetic sensing material, a SnO2 solution, prepared using the sol-gel method, was mixed with Fe3O4 at a ratio of SnO2:Fe3O4=3:1 and was deposited onto mesh-stacked electrodes. When the CO Gas Sensor was introduced, the sample was tested and verified inside a CO Gas chamber using a magnetic field generator composed of solenoidal coils. According to a careful investigation of the measurement results, the highest sensitivity, 1.73%/ppm, was obtained under 12 G in a horizontal magnetic field, indicating that the mechanism is applicable for use in an ultralow power chemical microSensor with high sensitivity.
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Research on a novel magnetic-catalytic sensing material on CMOS-MEMS Gas Sensor
2014 IEEE 3rd Global Conference on Consumer Electronics (GCCE), 2014Co-Authors: Hsin-ying Chen, Chih-hsiung ShenAbstract:In this research, a novel magnetic catalyzed SnO2 with Mn3O4 of CMOS-MEMS Gas Sensor is firstly proposed. Beyond the conventional heating methods to obtain high chemical reaction rate, the sensitivity of Gas Sensors can be enhanced by using our proposed magnetic catalysis technique at ultra-low power consumption. Fabrication of Sensor structure is realized by the standard 0.35μm CMOS process and MEMS post process. Preparing for the magnetic sensing material, the solution of SnCl4(aq) with powder of Mn3O4 and the precursor is mixed to obtain sol-gel solution. Measurement of Gas concentration of monoxide is arranged in the Gas chamber with solenoidal coils using magnetic material, SnO2-Mn3O4 coated onto a CMOS-MEMS Gas Sensor with donut-shaped stacked electrodes by horizontal magnetic field to facilitate sensitivity. Based on our mature CMOS-MEMS Gas Sensor structure and developed magnetic-catalytic sensing mechanism, the enhancement of sensitivity with SnO2-Mn3O4 is investigated and formulated with the Gibbs free energy and the Eyric equation. According to a careful investigation of the measurement results, the sensitivity of proposed CO Gas Sensor reaches 1.87%/ppm under the 6 Gauss. Moreover, the sensitivity of the novel material SnO2-Mn3O4 is better than our previous research with sensing material SnO2-Fe3O4. This research shows a highly practical application to CMOS Gas Sensor with a widespread magnetic-catalytic mechanism and sol-gel solution.
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Highly sensitive magnetic-catalytic Gas Sensor
2013 Seventh International Conference on Sensing Technology (ICST), 2013Co-Authors: Chih-hsiung Shen, Shu-jung ChenAbstract:Magnetic-catalyzed SnO2 with Fe3O4 of CMOS MEMS Gas Sensor is proposed and it's based on the magnetic-catalytic sensing mechanism to increase sensitivity. Beyond the conventional power dissipation of heating to maintain a certain working temperature, a new approach for Gas Sensor with magnetic-catalytic mechanism works at the ambient temperature without the consideration of active heating. The design and fabrication is realized by the standard 0.35μm CMOS process to fabricate a Gas Sensor with mesh stacked electrodes. For the preparation of magnetic sensing material, a prepared solution of sol-gel SnO2 is mixed at SnO2:Fe3O4 = 3:1, which was deposited onto mesh stacked electrodes. When the CO Gas Sensor is introduced, the sample is tested and verified inside a CO Gas chamber with a magnetic field generator of solenoid coil. We also build a magnetic-catalytic Gas reaction behavior description based on Gibbs free energy and the Eyring equation. A careful investigation of measurement results, at horizontal magnetic field, the sensitivity of proposed CO Gas Sensor reaches 1.73%/ppm under the 12 Gauss which shows widely applicable for an ultra-low power chemical microSensor with high sensitivity.
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Fe3O4 magnetic enhanced CMOS MEMS compatible Gas Sensor
2013 IEEE International Conference of IEEE Region 10 (TENCON 2013), 2013Co-Authors: Shi-ching Ke, Chih-hsiung ShenAbstract:A new magnetic-catalytic sensing mechanism to increase sensitivity for CMOS MEMS Gas Sensor with mesh stacked sensing electrodes is proposed. Beyond the conventional power dissipation of heating to maintain a certain working temperature, a novel Gas Sensor with magnetic-catalytic mechanism works at the ambient temperature without the consideration of active heating. The design and fabrication is realized by the standard 0.35μm CMOS process to fabricate a Gas Sensor with mesh stacked electrodes. For the preparation of magnetic sensing material, a prepared solution of sol-gel SnO2 is mixed at SnO2 : Fe3O4 = 3:1, which was deposited onto mesh stacked electrodes. Moreover, to obtain a stable Gas sensing signal, a pulse sampling scheme is proposed in this research work. Since the resistance of sensing material with sol-gel deposition shows a drift behavior under a DC bias circuit. We have proposed a new signal reading scheme with a pulse-type bias for a bridge sensing circuit. Only under the sampling phase, the sensing current flows through the sensing material which induces a voltage drop across the resistance. For the CO concentration measurement, the sample is tested and verified inside a CO Gas chamber with a magnetic field generator of solenoid coil. A careful investigation of measurement results, at horizontal magnetic field, the sensitivity of proposed CO Gas Sensor reaches 0.492%/ppm under the 12.12 Gauss which shows widely applicable for an ultra-low power chemical microSensor with high sensitivity.
Shoumin Zhang - One of the best experts on this subject based on the ideXlab platform.
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zno nanorod Gas Sensor for ethanol detection
Sensors and Actuators B-chemical, 2012Co-Authors: Liwei Wang, Shoumin Zhang, Yanfei Kang, Weiping Huang, Shurong WangAbstract:Abstract ZnO nanorods were fabricated by a simple low-temperature hydrothermal process in high yield (about 85%), starting with Zn(OH) 4 2− aqueous solution in the presence of CTAB, the CTAB serving as a structure director, and no calcination process was needed. The morphology and crystal structure of the prepared ZnO nanorods were characterized by X-ray diffraction (XRD), Scanning electron microscope (SEM) and Transmission electron microscope (TEM). The ZnO nanorods were then used to construct a Gas Sensor for ethanol detection at different operating temperature. The as-prepared ZnO nanorod Gas Sensor exhibited a high, reversible and fast response to ethanol, indicating its potential application as a Gas Sensor to detect ethanol.
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ZnO nanorod Gas Sensor for ethanol detection
Sensors and Actuators B: Chemical, 2012Co-Authors: Liwei Wang, Shoumin Zhang, Xianghong Liu, Yanfei Kang, Weiping Huang, Shurong WangAbstract:ZnO nanorods were fabricated by a simple low-temperature hydrothermal process in high yield (about 85%), starting with Zn(OH)42-aqueous solution in the presence of CTAB, the CTAB serving as a structure director, and no calcination process was needed. The morphology and crystal structure of the prepared ZnO nanorods were characterized by X-ray diffraction (XRD), Scanning electron microscope (SEM) and Transmission electron microscope (TEM). The ZnO nanorods were then used to construct a Gas Sensor for ethanol detection at different operating temperature. The as-prepared ZnO nanorod Gas Sensor exhibited a high, reversible and fast response to ethanol, indicating its potential application as a Gas Sensor to detect ethanol. © 2011 Elsevier B.V. All rights reserved.
