EVALUATION OF THE GRAPHENE NANOSHEETS AS GAS SENSOR FOR NH3 VIA ELECTRICAL PROPERTIES-Reference-Cited by-同舟云学术

EVALUATION OF THE GRAPHENE NANOSHEETS AS GAS SENSOR FOR NH3 VIA ELECTRICAL PROPERTIES

Published:2020-07-20 Issue:10 Volume:27 Page:1950215
ISSN:0218-625X
Container-title:Surface Review and Letters
language:en
Short-container-title:Surf. Rev. Lett.

Author:

AHMED MUHANAD A.¹,MONIR HIND Q. MOHAMMAD¹,AL-KEISY AMAR²^ORCID

Affiliation:

1. Department of Electrical Technology, Technical Institute of Baghdad, Middle Technical University (MTU), Baghdad, Iraq

2. Nanotechnology and Advanced Materials Research Center, University of Technology, Baghdad, Iraq

Abstract

In this paper, graphene nanosheets were used to detect ammonia gas (NH[Formula: see text]. Graphene dispersion was drop cast on special ceramic substrate to fabricate the gas sensor. The measurements were based on measuring the resistance before and after the gas exposure. A considerable increase in the resistance after gas exposure was found. Resistance increased from 1.4[Formula: see text]k[Formula: see text] to 1.8[Formula: see text]k[Formula: see text] just in less than 3[Formula: see text]s. Recovery time is also determined at room temperature and it was 2[Formula: see text]h. The delay in recovery time was ascribed to the fact that desorption is slower than the adsorption. Response to ammonia gas is calculated and demonstrates a maximum response of 198.6% after about 5[Formula: see text]min.

Publisher

World Scientific Pub Co Pte Lt

Subject

Materials Chemistry,Surfaces, Coatings and Films,Surfaces and Interfaces,Condensed Matter Physics

Link

https://www.worldscientific.com/doi/pdf/10.1142/S0218625X19502159

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