A Novel Ultra-Sensitive Nitrogen Dioxide Sensor Based on Germanium Monosulfide Monolayer

Nitrogen dioxide (NO 2 ) is a representative toxic gas that plays a key role in variety of fields. Due to its extensive application, the demands for reliable sensors to detect NO 2 are extremely urgent. Here, we report the adsorption of N 2 , CO 2 , O 2 , and NO 2 molecules on the GeS monolayer from...

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Bibliographic Details
Published inIEEE electron device letters Vol. 38; no. 11; pp. 1590 - 1593
Main Authors Wang, Shao-Gang, Tan, Chun-Jian, Yang, Qun, Xu, Yi-Xin, Li, Shao-Lin, Chen, Xian-Ping
Format Journal Article
LanguageEnglish
Published IEEE 01.11.2017
Subjects
Adsorption
Atomic layer deposition
Charge transfer
First principles
Gas detectors
Gases
GeS monolayer
Ground penetrating radar
Molecular dynamics
NO₂ Sensor
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Summary:Nitrogen dioxide (NO 2 ) is a representative toxic gas that plays a key role in variety of fields. Due to its extensive application, the demands for reliable sensors to detect NO 2 are extremely urgent. Here, we report the adsorption of N 2 , CO 2 , O 2 , and NO 2 molecules on the GeS monolayer from atomic scale to device scale by first principles and molecular dynamics method. The results indicate that the GeS monolayer is sensitive to NO 2 molecules with moderate adsorption energy and pronounced charge transfer. Remarkably, the sorption quantity of the GeS monolayer for NO 2 is 708.707 mg/g under the 101.33 kPa, which is much higher than other molecules. Additionally, the I-V characteristic reveals that when the NO 2 molecule is adsorbed, the resistance of the GeS monolayer is nontrivially and distinctly changed. The extraordinary sensitivity and selectivity of the GeS monolayer for NO 2 molecules suggests the GeS monolayer is a potential sensing material for NO 2 gas.
ISSN:0741-3106
1558-0563
DOI:10.1109/LED.2017.2755060