Ab-initio modelling for gas sensor device: based on Y-doped SnS2 monolayer

In this paper, star-fruit-shaped CuO microstructures were hydrothermally synthesized and subsequently characterized through different techniques to understand morphological, compositional, structural, crystal, optical and vibrational properties. The formation of star-fruit-shaped structures along with some polygonal and spherical nanostructures was confirmed by FESEM analysis. XRD data and Raman spectrum confirmed the monoclinic tenorite crystalline phase of the CuO with crystal size 17.61 nm. Star-fruit-shaped CuO microstructures were examined for ethanol gas sensing behavior at various operating temperatures and concentrations. The gas response of 135% was observed at the optimal temperature of 225 °C. Due to excellent selectivity, stability and re-usability, the as-fabricated sensor based on star-fruit-shaped CuO micro-structures may be explored for future toxic gas sensor applications.

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A Novel Type Room Temperature Surface Photovoltage Gas Sensor Device

10.20944/preprints201807.0572.v1 ◽

2018 ◽

Author(s):

Monika Kwoka ◽

Michal A. Borysiewicz ◽

Pawel Tomkiewicz ◽

Anna Piotrowska ◽

Jacek Szuber

Keyword(s):

Gas Sensor ◽

Room Temperature ◽

Gas Sensing ◽

Signal To Noise Ratio ◽

High Sensitivity ◽

Fast Response ◽

Surface Photovoltage ◽

Kelvin Probe ◽

Sensor Device ◽

Developed Surface

In this paper a novel type of a highly sensitive gas sensor device based on the surface photovoltage effect is described. The developed surface photovoltage gas sensor is based on a reverse Kelvin probe approach. As the active gas sensing electrode the porous ZnO nanostructured thin films are used deposited by the direct current (DC) reactive magnetron sputtering method exhibiting the nanocoral surface morphology combined with an evident surface nonstoichiometry related to the unintentional surface carbon and water vapor contaminations. Among others, the demonstrated SPV gas sensor device exhibits a high sensitivity of 1 ppm to NO2 with a signal to noise ratio of about 50 and a fast response time of several seconds under the room temperature conditions.

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An ab initio study of sensing applications of MoB2 monolayer: a potential gas sensor

Physical Chemistry Chemical Physics ◽

10.1039/c8cp07038e ◽

2019 ◽

Vol 21 (8) ◽

pp. 4633-4640 ◽

Cited By ~ 14

Author(s):

Amreen Bano ◽

Jyoti Krishna ◽

Devendra K. Pandey ◽

N. K. Gaur

Keyword(s):

Ab Initio ◽

Gas Sensor ◽

Recovery Time ◽

Ab Initio Study ◽

Fast Recovery ◽

Sensing Applications

Theoretically studied MoB2 monolayer detects NO2 gas with fast recovery time.

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A review on the sensing performances for three different ternary hybrid (Pd/RGO/TiO2-NTs, Pd/RGO/MnO2-NFs and Pd/RGO/WO3-NFs) gas sensor device structures

CSI Transactions on ICT ◽

10.1007/s40012-020-00299-z ◽

2020 ◽

Vol 8 (2) ◽

pp. 117-122

Author(s):

Sanghamitra Ghosal ◽

Partha Bhattacharyya

Keyword(s):

Gas Sensor ◽

Sensor Device ◽

Device Structures ◽

Tio2 Nts

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A Robust Fiber Bragg Grating Hydrogen Gas Sensor Using Platinum-Supported Silica Catalyst Film

Journal of Sensors ◽

10.1155/2018/5810985 ◽

2018 ◽

Vol 2018 ◽

pp. 1-8 ◽

Cited By ~ 3

Author(s):

Marina Kurohiji ◽

Seiji Ichiriyama ◽

Naoki Yamasaku ◽

Shinji Okazaki ◽

Naoya Kasai ◽

...

Keyword(s):

Fiber Bragg Grating ◽

Gas Sensor ◽

Temperature Change ◽

Catalytic Combustion ◽

Room Temperature ◽

Precursor Solution ◽

Hydrogen Gas ◽

Combustion Heat ◽

Catalyst Film ◽

Sensor Device

A robust fiber Bragg grating (FBG) hydrogen gas sensor for reliable multipoint-leakage monitoring has been developed. The sensing mechanism is based on shifts of center wavelength of the reflection spectra due to temperature change caused by catalytic combustion heat. The sensitive film which consists of platinum-supported silica (Pt/SiO2) catalyst film was obtained using sol-gel method. The precursor solution was composed of hexachloroplatinic acid and commercially available silica precursor solution. The atom ratio of Si : Pt was fixed at 13 : 1. A small amount of this solution was dropped on the substrate and dried at room temperature. After that, the film was calcined at 500°C in air. These procedures were repeated and therefore thick hydrogen-sensitive films were obtained. The catalytic film obtained by 20-time coating on quartz glass substrate showed a temperature change 75 K upon exposure to 3 vol.% H2. For realizing robust sensor device, this catalytic film was deposited and FBG portion was directly fixed on titanium substrate. The sensor device showed good performances enough to detect hydrogen gas in the concentration range below lower explosion limit at room temperature. The enhancement of the sensitivity was attributed to not only catalytic combustion heat but also related thermal strain.

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