Gas sensing characteristics of the FET-type gas sensor having inkjet-printed WS2 sensing layer

2019 ◽  
Vol 153 ◽  
pp. 27-32 ◽  
Author(s):  
Yujeong Jeong ◽  
Jongmin Shin ◽  
Yoonki Hong ◽  
Meile Wu ◽  
Seongbin Hong ◽  
...  
Keyword(s):  
Gas Sensor ◽  
Gas Sensing ◽  
Sensing Characteristics

Fabrication of a propanol gas sensor using p-type nickel oxide nanostructures: The effect of ramping rate towards luminescence and gas sensing characteristics

2020 ◽  
Vol 253 ◽  
pp. 123316 ◽  
Author(s):  
Teboho P. Mokoena ◽  
Kenneth T. Hillie ◽  
Hendrik C. Swart ◽  
Nompumelelo Leshabane ◽  
James Tshilongo ◽  
...  
Keyword(s):  
Nickel Oxide ◽  
Gas Sensor ◽  
Gas Sensing ◽  
Oxide Nanostructures ◽  
P Type ◽  
Sensing Characteristics ◽  
Type Nickel

A Formaldehyde Indoor Gas Sensor Based on Hierarchical α-Molybdenum Trioxide

2021 ◽  
Vol 16 (6) ◽  
pp. 987-992
Author(s):  
Yujun Zhu ◽  
Fan Zhang ◽  
Kaifang Wang ◽  
Yawen Zhang ◽  
Xiuzhi Gu ◽  
...  
Keyword(s):  
Gas Sensor ◽  
Indoor Air ◽  
Gas Sensing ◽  
Molybdenum Trioxide ◽  
Three Dimensional ◽  
Test Results ◽  
Hierarchical Microstructure ◽  
Formaldehyde Sensing ◽  
2D Nanosheets ◽  
Sensing Characteristics

The detection of indoor formaldehyde gas is important because of its highly toxic nature. Herein, the two-dimensional α-MoO3 nanosheets and three-dimensional α-MoO3 hierarchical flowers have been prepared by simple hydrothermal strategy and used as the formaldehyde sensing materials. Their microstructures, morphologies and gas sensing characteristics towards formaldehyde were studied. The test results exhibited that, at the optimal temperature of 250 °C, the sensor performances were enhanced due to the assembly of 2D nanosheets into 3D hierarchical structure. The improved properties were contributed to the formation of the hierarchical microstructure constructed by nanosheets. The hierarchical microstructure based gas sensor has significant potential in indoor air sensing application.

Enhancement of SO2 Gas Sensing Performance of Co3O4 Spinel by Cu Substitution

2020 ◽  
Vol 18 (2) ◽  
pp. 83-88
Author(s):  
P. N. Anantharamaiah ◽  
Sweta Giri
Keyword(s):  
Cobalt Oxide ◽  
Gas Sensor ◽  
Gas Sensing ◽  
Response Times ◽  
Poor Response ◽  
Potential Candidate ◽  
Potential Applicability ◽  
Co Precipitation ◽  
Gas Response ◽  
Sensing Characteristics

Single-phase spinel cobalt oxide (Co3O4) and copper-substituted cobalt oxide (Co2.8Cu0.2O4) nanomaterials were synthesized via a co-precipitation route. To explore the potential applicability of the Co3O4 and Co2.8Cu0.2O4 materials for gas sensor fabrication, their SO2 gas sensing characteristics were studied at three different temperatures using the gas concentration of 3 ppm. Unsubstituted Co3O4 sample exhibits poor response towards SO2 gas whereas the Cu-substituted sample showed superior gas sensing characteristics such as gas response, response time and recovery time at all three temperatures. Among the three studied temperatures, the maximum gas response of 7.5% was found at 200 °C with recovery and response times of 26 sec, indicating an optimal temperature. Our results demonstrate that the nanostructured Co2.8Cu0.2O4 material could be a potential candidate to design SO2 gas sensor for detection of low concentration gas.

scholarly journals 2-Methyl-2,4-pentanediol gas sensor properties of nano-SnO2 flat-type coplanar gas sensing arrays at low detection limit

2014 ◽  
Vol 32 (2) ◽  
pp. 181-187
Author(s):  
Chao Zhu ◽  
Kaijin Huang ◽  
Fangli Yuan ◽  
Changsheng Xie
Keyword(s):  
Gas Sensor ◽  
Gas Sensing ◽  
Sensor Arrays ◽  
Response Recovery ◽  
Screen Printing Technique ◽  
Flat Type ◽  
Sensor Properties ◽  
On Line ◽  
Sensing Characteristics ◽  
Gas Sensor Arrays

AbstractNano-SnO2 flat-type coplanar 2-Methyl-2,4-pentanediol (MPD) gas sensor arrays were fabricated by a screen-printing technique based on nano-SnO2 powders prepared by a hydrothermal method. The results show that the fabricated gas sensor arrays have good MPD gas sensing characteristics, such as good selectivity and response-recovery characteristics. Especially, they can be used for detecting the concentration of MPD gas as low as 1 ppm which is much lower than the legal concentration of 20 ppm or 25 ppm. The good sensing properties indicate that the SnO2 gas sensor arrays have great potential for on-line or portable monitoring of MPD gas in practical environments.

The Effect of Carbon Nanotube Dispersion on CO Gas Sensing Characteristics of Polyaniline Gas Sensor

2006 ◽  
Vol 6 (12) ◽  
pp. 3893-3896 ◽  
Author(s):  
Y. Wanna ◽  
N. Srisukhumbowornchai ◽  
A. Tuantranont ◽  
A. Wisitsoraat ◽  
N. Thavarungkul ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Gas Sensor ◽  
Gas Sensing ◽  
Carbon Nanotube Dispersion ◽  
Nanotube Dispersion ◽  
Sensing Characteristics ◽  
Co Gas

Material and Structural Engineering of Metal Oxides Aimed for Gas Sensor Applications

2014 ◽  
Vol 974 ◽  
pp. 76-85 ◽  
Author(s):  
Ghenadii Korotcenkov ◽  
B.K. Cho
Keyword(s):  
Metal Oxides ◽  
Gas Sensor ◽  
Gas Sensors ◽  
Noble Metals ◽  
Structural Engineering ◽  
Gas Sensing ◽  
Sensor Applications ◽  
Sensing Characteristics

In this review different aspects of material and structural engineering of metal oxides aimed for application in conductometric gas sensors (chemiresistors) were analyzed. Results, mainly obtained for SnO2and In2O3–based sensors during surface functionalizing by noble metals have been used for showing an opportunity of material and structural engineering of metal oxides to optimize gas sensing characteristics.

scholarly journals Studies of NO2 Gas-Sensing Characteristics of a Novel Room-Temperature Surface-Photovoltage Gas Sensor Device

Sensors ◽  
2020 ◽  
Vol 20 (2) ◽  
pp. 408 ◽  
Author(s):  
Monika Kwoka ◽  
Jacek Szuber
Keyword(s):  
Gas Sensor ◽  
Gas Flow ◽  
Room Temperature ◽  
Gas Sensing ◽  
Relative Concentration ◽  
Surface Photovoltage ◽  
Sensor Device ◽  
Gas Atmosphere ◽  
Sensing Characteristics ◽  
Temperature Surface

In this work the characteristics of a novel type of room temperature NO2 gas sensor device based on the surface photovoltage effect are described. It was shown that for our SPV gas sensor device, using porous sputtered ZnO nanostructured thin films as the active gas sensing electrode material, the basic gas sensor characteristics in a toxic NO2 gas atmosphere are strongly dependent on the target NO2 gas flow rate. Moreover, it was also confirmed that our SPV gas sensor device is able to detect the lowest NO2 relative concentration at the level of 125 ppb, with respect to the commonly assumed signal-to-noise (S/N) ratio, as for the commercial devices.

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