Fabrication of Room Temperature NO2 Gas Sensor based on Silver Nanoparticles-Decorated Carbon Nanotubes

Waleed, Kh. Mahmood; Asama, N. Naje

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Title	Fabrication of Room Temperature NO2 Gas Sensor based on Silver Nanoparticles-Decorated Carbon Nanotubes
Authors	Waleed, Kh. Mahmood Asama, N. Naje
Keywords	functionalized-SWCNTs NO2 gas porous silicon sensitivity silver NPs response time fermi level room temperature chemical reduction
Type	Article
Date of Issue	2018
URI	http://essuir.sumdu.edu.ua/handle/123456789/71498
Publisher	Sumy State University
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Citation	Waleed, Kh. Mahmood Fabrication of Room Temperature NO2 Gas Sensor based on Silver Nanoparticles-Decorated Carbon Nanotubes / K.M. Waleed, N.N. Asama // Журнал нано- та електронної фізики. - 2018. - Т.10, № 5. - 05020. - DOI: 10.21272/jnep.10(5).05020
Abstract	Functionalized-single wall carbon nanotubes (F-SWCNTs) were easily and efficiently decorated with Ag Nanoparticles. The sensor device consisted of a film of sensitive material (F-SWCNTs) and (F-SWCNTs/Ag NPs) deposited by drop coating on n-type porous silicon substrate. The two sensors show high sensitivity to NO2 gas at different temperatures. Test results demonstrated that the (F-SWCNTs/Ag NPs) have a better performance than (F-SWCNTs). The F-SWCNTs gas sensor shows high sensitivity (36 %) at RT with response time 11 sec, whereas F-SWCNTs/Ag NPs gas sensor shows better sensitivity (150.5 %) at RT with response time 8 sec. The device shows a very reproducible sensor performance, with high repeatability, full recovery and efficient response. The improvement in the detection of some specific gases (NO2) using Ag-functionalized nanotubes is explained.
Appears in Collections:	Журнал нано- та електронної фізики (Journal of nano- and electronic physics)