Effect of film thickness on gas sensing properties of sprayed WO3 thin films

2017 ◽  
Vol 41 (20) ◽  
pp. 11807-11816 ◽  
Author(s):  
Rhushikesh Godbole ◽  
V. P. Godbole ◽  
P. S. Alegaonkar ◽  
Sunita Bhagwat
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Electrical Properties ◽  
Film Thickness ◽  
Gas Sensing ◽  
Sensing Properties ◽  
Thin Film Sensors ◽  
Gas Sensing Properties ◽  
Property Performance ◽  
Wo3 Thin Films

This study correlates thicknesses, morphology, electrical properties with gas-sensing capability of WO3 thin-film sensors which contributes to understanding of property-performance relationship.

Effect of solution concentration on physicochemical and gas sensing properties of sprayed WO3 thin films

2015 ◽  
Vol 15 (2) ◽  
pp. 84-93 ◽  
Author(s):  
V.V. Ganbavle ◽  
S.V. Mohite ◽  
J.H. Kim ◽  
K.Y. Rajpure
Keyword(s):  
Thin Films ◽  
Gas Sensing ◽  
Solution Concentration ◽  
Sensing Properties ◽  
Gas Sensing Properties ◽  
Wo3 Thin Films

scholarly journals Sol–gel derived mesoporous Pt and Cr-doped WO3 thin films: the role played by mesoporosity and metal doping in enhancing the gas sensing properties

2011 ◽  
Vol 60 (3) ◽  
pp. 378-387 ◽  
Author(s):  
Massimiliano D’Arienzo ◽  
Maurizio Crippa ◽  
Paolo Gentile ◽  
Claudio Maria Mari ◽  
Stefano Polizzi ◽  
...  
Keyword(s):  
Thin Films ◽  
Gas Sensing ◽  
Sol Gel ◽  
Metal Doping ◽  
Sensing Properties ◽  
Gas Sensing Properties ◽  
Wo3 Thin Films

Evaluation of depletion layer width and gas-sensing properties of antimony-doped tin oxide thin film sensors

2015 ◽  
Vol 220 ◽  
pp. 1354-1360 ◽  
Author(s):  
Jianqiao Liu ◽  
Xuesong Liu ◽  
Zhaoxia Zhai ◽  
Guohua Jin ◽  
Qiuxuan Jiang ◽  
...  
Keyword(s):  
Thin Film ◽  
Tin Oxide ◽  
Gas Sensing ◽  
Depletion Layer ◽  
Oxide Thin Film ◽  
Layer Width ◽  
Sensing Properties ◽  
Depletion Layer Width ◽  
Thin Film Sensors ◽  
Gas Sensing Properties

Au/Pd Bimetallic Nanoparticles Decorated SnSe2 Thin Films for NO2 Detection

2021 ◽  
Vol 21 (9) ◽  
pp. 4916-4920
Author(s):  
Sanju Rani ◽  
Manoj Kumar ◽  
Yogesh Singh ◽  
Vidya Nand Singh
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Ambient Temperature ◽  
Surface Area ◽  
Gas Sensing ◽  
Sensing Properties ◽  
Toxic Gases ◽  
Gas Sensing Properties ◽  
Recovery Times ◽  
Response And Recovery

In order to have a check and balance of the toxic gases in the environment, various kinds of sensors are currently being researched upon. As many of the toxic gases are also inflammable, therefore, there is a constant search for materials which can detect the gases at lower temperatures. Also, it is important that the sensor is selective for a particular gas. To meet such requirements, nanos-tructured materials are extensively being explored for such gas sensing applications, due to their large effective surface area. And, in order to further improve the gas sensing properties, metal catalysts are deposited over such nanomaterials. The smaller sized nanoparticles show better catalytic activity due to its effective larger surface area per unit volume. Depositing bimetallic materials is thus advantageous, since it can reduce the size of nanoparticles produced. In this work, ~7 nm thick Au/Pd thin film was sputter-coated over SnSe2 nanostructured thin films. SnSe2 thin film were deposited by thermally evaporating SnSe2 powder. The materials were characterized for their structural, morphological and gas sensing properties. The ambient temperature response for 5 parts per million (ppm) NO2 gas was measured to be 117%, with the response and recovery times being 10 and 19 seconds, respectively. The performance of the sensor improved with increase in the gas concentration and for 10 ppm gas, the recorded response was 137%, with the corresponding response and recovery times being 9 and 8 seconds, respectively. The limit of detection was 655 parts per billion (ppb). The mechanism of ambient temperature high response and low response/recovery times have been discussed based on physisorption, charge transfer, Au/Pd decoration and SnSe–SnSe2 based p–n junction. In addition, an important aspect of this work worth pointing out is the deposition of a thin film consisting of nanostructured network using an industrially viable thermal evaporation method. Thus, this work opens a new dimension for 2D materials that can be used for selective gas detection at ambient temperature.

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