Simulation studies on the responses of ZnO-CuO/CNT nanocomposite based SAW sensor to various volatile organic chemicals

被引:41
作者
Abraham, Nelsa [1 ,2 ]
Krishnakumar, R. Reshma [1 ]
Unni, C. [2 ]
Philip, Daizy [3 ]
机构
[1] Govt Engn Coll, Dept ECE, Barton Hill, Thiruvananthapuram 695035, Kerala, India
[2] Ctr Dev Imaging Technol, Chitranjali Hills, Thiruvananthapuram 695027, Kerala, India
[3] Mar Ivanios Coll, Dept Phys, Thiruvananthapuram 695015, Kerala, India
来源
JOURNAL OF SCIENCE-ADVANCED MATERIALS AND DEVICES | 2019年 / 4卷 / 01期
关键词
ZnO; CuO; Surface acoustic waves; Sensors; Carbon nano tubes; GAS-SENSING MECHANISM; ACOUSTIC-WAVE SENSOR; CARBON NANOTUBES; METAL-OXIDE; DESIGN; SENSITIVITY;
D O I
10.1016/j.jsamd.2018.12.006
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Surface acoustic wave (SAW) sensors offer a sensitive platform for monitoring important physical entities with several advantages. They can operate well in extreme conditions such as high temperature, high pressure and toxic environment. This work presents a 2D model of SAW sensor with carbon nano tubes (CNT) as the adsorbent material. A second model was also created by incorporating ZnO and CuO nanospheres into the sensing layer. The responses of the two sensors towards various gases were analysed at room temperature. The design was modelled and analysed using COMSOL Multiphysics software which applies the finite element analysis to solve for Eigen frequencies. The shift in the resonant frequencies with and without the presence of gases, which is a measure of sensitivity has been estimated for all the gases. The second model showed improved response. This novel ZnO-CuO/CNT SAW sensor combining the sensing properties of metal oxide nanostructures and CNT with improved characteristics can be used as a promising candidate for sensing important volatile organic chemicals at room temperature. (C) 2018 The Authors. Publishing services by Elsevier B.V. on behalf of Vietnam National University, Hanoi.
引用
收藏
页码:125 / 131
页数:7
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