Enhancement of functionalized carbon nanotubes gas sensor by adding metal oxide nanoparticles

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Sally K. Abbas
Asama Natik Naje

Abstract

Functionalized-multi wall carbon nanotubes (F-MWCNTs) and functionalized-single wall carbon nanotubes (F-SWCNTs) were well enhanced using CoO Nanoparticles. The sensor device consisted of a film of sensitive material (F-MWCNTs/CoONPs) and (F-SWCNTs/CoO NPs) deposited by drop- casting on an n-type porous silicon substrate. The two sensors perform high sensitivity to NO2 gas at room temperatures. The analysis indicated that the (F-MWCNTs/CoONPs) have a better performance than (F-SWCNTs/CoONPs). The F-SWCNTs/CoONPs gas sensor shows high sensitivity (19.1 %) at RT with response time 17 sec, while F-MWCNTs/CoONPs gas sensor show better sensitivity (39 %) at RT with response time 13 sec. The device shows a very reproducible sensor performance, with high repeatability, complete recovery, and adequate response. A demonstration of the improvement in sensing of NO2 gas using CoO-functionalized nanotubes is provided.

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Abbas SK, Naje AN. Enhancement of functionalized carbon nanotubes gas sensor by adding metal oxide nanoparticles. IJP [Internet]. 2020 Dec. 1 [cited 2024 Dec. 29];18(47):62-7. Available from: https://ijp.uobaghdad.edu.iq/index.php/physics/article/view/579

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