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https //iaeme com/Home/journal/IJECET 13 editor@iaeme com International Journal of Electronics and Communication Engineering and Technology (IJECET) Volume 13, Issue 1, January April 2022, pp 13 16 Ar[.]
International Journal of Electronics and Communication Engineering and Technology (IJECET) Volume 13, Issue 1, January-April 2022, pp 13-16 Article ID: IJECET_13_01_003 Available online at https://iaeme.com/Home/issue/IJECET?Volume=13&Issue=1 ISSN Print: 0976-6464 and ISSN Online: 0976-6472 DOI: https://doi.org/10.17605/OSF.IO/HMP6R © IAEME Publication STUDY OF GAS SENSOR USING CVD METHOD GROWTH ZnO NANOWIRES APPLIED FOR VEHICLE Phung Le Minh Dong Nai Technology University, Vietnam ABSTRACT In this study, we growth the ZnO nano-structure on copper wire with CVD method The structure showed diode characteristics and environment sensitive owing to the semi-pn junction formed by CuO and ZnO and the light and gas sensitive of ZnO Such device showed good response under various gas environment and the response in increase in further under light illumination Keywords: ZnO, nano-structure, CVD, environment sensitive, Gas Sensor Cite this Article: Phung Le Minh, Study of Gas Sensor Using CVD Method Growth ZnO Nanowires Applied for Vehicle, International Journal of Electronics and Communication Engineering and Technology, 13(1), 2022, pp 13-16 https://iaeme.com/Home/issue/IJECET?Volume=13&Issue=1 INTRODUCTION With the advancement of science and technology element declining scale, nanotechnology has been widely studied, In order to improve industrial safety, the detection of hazardous gaseous species has become increasingly important.[1-3] Nano sensing material have been developed which have a high response, and excellent sensing selectivity ZnO is a versatile II–VI semiconductor with numerous applications ranging from optoelectronics to chemical sensors because of its distinctive optical, electronic and chemical properties In recent years, one-dimensional (1D) ZnO nanostructure, such as nanowire, nanorods, nanobelts and nanotetrapod, have attracted much attention.[2-5] In this experiment, we used the CVD method to successfully fabricate the ZnO nanowire structure, which has the sensitivity to the gas [6-7] EXPERIMENT All ZnO nanowires are fabricated with chemical vapor deposition (CVD) method First, We use the high purity copper wires and zinc piece were placed in a quartz tube, and keep the pressure of quartz chamber in 1x10-4 Torr, The quartz chamber was then heated to 450 °C to allow zinc sublimation to react with oxygen form zinc oxide and the process maintain for hours [ 5-6] https://iaeme.com/Home/journal/IJECET 13 editor@iaeme.com Study of Gas Sensor Using CVD Method Growth ZnO Nanowires Applied for Vehicle After the wire growth, the ZnO nanowires connected with the circuit and the I-V curve was measured by Keithley 2450 Source Meter for IV characteristics measurement under air and gas environments [ 7-8] RESULT AND DISCUSSION Figure shows the SEM image of ZnO nanostructure It can be found that the ZnO nano structure were grow on the copper wire successfully To confirm the electrical properties of ZnO nanowires in further, the IV characteristics were measured and the result was shown as Figure below It can be found that the ZnO nanowire behavior as the Shockey diode owing the growth of CuO under thermal treatment and thus forming the semi-pn junction of CuO and ZnO Fig The SEM picture of ZnO Nnanowire Figure The I-V curve of ZnO nanowire https://iaeme.com/Home/journal/IJECET 14 editor@iaeme.com Phung Le Minh Figure The resistance of different sensing The properties of gas sensing were done under the oxygen and ethanol environments Figure shows the sensing properties in the ethanol environment During the sensing process, ZnO reacts with oxygen to produce ether and H2O and releases electrons adsorbed by oxygen molecules on the zinc oxide surface 2CH3CH2OH(ads)+O-2(ads) → 2CH3CHO+2H2O+eSo, in an oxygen-filled environment, the resistance increases, in an ethanol-filled environment, the resistance is reduced fast Figure shows the resistance changes under dark and illumination condition It can be found that the response of resistance change was much faster under illumination than which under dark condition result from the photoconductive property of ZnO with increase the electron density in the conduction channel Figure The sensing resistance of different brightness https://iaeme.com/Home/journal/IJECET 15 editor@iaeme.com Study of Gas Sensor Using CVD Method Growth ZnO Nanowires Applied for Vehicle CONCLUSION In the summary, we fabricated the ZnO nano-structure on copper wire through CVD method The growth of CuO under thermal treatment forming the semi-pn junction between CuO and ZnO, result in the diode behavior of our device Such device showed well response under oxygen and ethanol environments and the response could be increase in further under light illumination REFERENCES [1] Kiasari, Nima Mohseni, Saeid Soltanian, Bobak Gholamkhass, and Peyman Servati "Room temperature ultra-sensitive resistive humidity sensor based on single zinc oxide nanowire." Sensors and Actuators A: Physical 182 (2012): 101-105 [2] Bhati, Vijendra Singh, Mirabbos Hojamberdiev, and Mahesh Kumar "Enhanced sensing performance of ZnO nanostructures-based gas sensors: A review." Energy Reports (2020): 46-62 [3] Chen, Xiangxiang, Yanbai Shen, Wei Zhang, Jin Zhang, Dezhou Wei, Rui Lu, Lijia Zhu, Hansen Li, and Yansong Shen "In-situ growth of ZnO nanowire arrays on the sensing electrode via a facile hydrothermal route for high-performance NO2 sensor." Applied Surface Science 435 (2018): 1096-1104 [4] Tiwale, N "Zinc oxide nanowire gas sensors: fabrication, functionalisation and devices." Materials science and Technology 31, no 14 (2015): 1681-1697 [5] Drobek, Martin, Jae-Hun Kim, Mikhael Bechelany, Cyril Vallicari, Eric Leroy, Anne Julbe, and Sang Sub Kim "Design and fabrication of highly selective H2 sensors based on SIM-1 nanomembrane-coated ZnO nanowires." Sensors and Actuators B: Chemical 264 (2018): 410418 [6] Chang, Sheng-Po, Shoou-Jinn Chang, Chien-Yuan Lu, Meng-Ju Li, Cheng-Liang Hsu, YuZung Chiou, Ting-Jen Hsueh, and I-Cherng Chen "A ZnO nanowire-based humidity sensor." Superlattices and Microstructures 47, no (2010): 772-778 [7] Nikolic, Maria Vesna, Vladimir Milovanovic, Zorka Z Vasiljevic, and Zoran Stamenkovic "Semiconductor gas sensors: Materials, technology, design, and application." Sensors 20, no 22 (2020): 6694 [8] Yuan, Zhenyu, Fan Yang, and Fanli Meng "Research Progress on Coating of Sensitive Materials for Micro-Hotplate Gas Sensor." Micromachines 13, no (2022): 491 https://iaeme.com/Home/journal/IJECET 16 editor@iaeme.com .. .Study of Gas Sensor Using CVD Method Growth ZnO Nanowires Applied for Vehicle After the wire growth, the ZnO nanowires connected with the circuit and... sensing resistance of different brightness https://iaeme.com/Home/journal/IJECET 15 editor@iaeme.com Study of Gas Sensor Using CVD Method Growth ZnO Nanowires Applied for Vehicle CONCLUSION In... diode owing the growth of CuO under thermal treatment and thus forming the semi-pn junction of CuO and ZnO Fig The SEM picture of ZnO Nnanowire Figure The I-V curve of ZnO nanowire https://iaeme.com/Home/journal/IJECET