Journal ArticleDOI
Highly sensitive SnO2 thin film NO2 gas sensor operating at low temperature
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TLDR
In this article, the structural and morphological properties of thin nano-crystalline SnO 2 and WO 3 -doped SnO2 films are investigated using XRD, TEM and AFM.Abstract:
Thin films of pure nano-crystalline SnO 2 and WO 3 -doped SnO 2 in different concentrations (3 wt.% and 5 wt.%) are deposited using sol–gel spin coating technique on glass substrates. The structural and morphological properties of these films are investigated using XRD, TEM and AFM. The sensitivity and selectivity of these films are tested to different reducing and oxidizing gases such as SO 2 , NH 3 , NO 2 and ethanol. A SnO 2 thin film with 5 wt.% WO 3 shows very high responses to NO 2 (four orders of magnitude in the value of ( R g − R a )/ R a ; R g and R a are the resistance in NO 2 and in air, respectively) and excellent selectivity for NO 2 gas at a low operating temperature of 150 °C. The effect of WO 3 on the sensing characteristics of these films towards NO 2 is discussed.read more
Citations
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Physical principle of enhancing the sensitivity of a metal oxide gas sensor using bulk acoustic waves
TL;DR: In this article, the physical principle of the BAW assisted gas sensor is investigated experimentally and theoretically, and the effects of sound pressure and acoustic streaming on the sensing process are directly verified.
Journal ArticleDOI
Bias dependent NO2 sensitivity of SnO2 thin films at room temperature
TL;DR: Amorphous granular SnO2 thin films were investigated from a standpoint of an NO2 gas sensor working at room temperature in this paper, which showed that the sensor response was highly dependent on bias voltage between the sensor electrodes.
Journal ArticleDOI
Simple fabrication method of silicon/tungsten oxide nanowires heterojunction for NO2 gas sensors
TL;DR: In this paper, a gas sensor based on n-type silicon/n-type suspended tungsten oxide nanowire (WOX NW) heterojunctions was fabricated by stress-induced method for WOX NW synthesis on Si MEMS structures.
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Assessment of fractal and multifractal features of sol-gel spin coated ZnO thin film surface
Koushik Ghosh,R.K. Pandey +1 more
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Nanostructured boron carbide (B4C): A bio-compatible and recyclable photo-catalyst for efficient wastewater treatment
Paviter Singh,Gurpreet Kaur,Kulwinder Singh,Manjot Kaur,Manjeet Kumar,Ramovatar Meena,Rajni Bala,Akshay Kumar +7 more
TL;DR: In this article, a photocatalytic study of biocompatible nanostructured Boron Carbide (B4C) for organic (Methylene blue, MB) as well as industrial (Synazol yellow, SY) dye was conducted.
References
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Book
Elements of X-ray diffraction
TL;DR: In this article, the authors present a chemical analysis of X-ray diffraction by Xray Spectrometry and phase-diagram Determination of single crystal structures and phase diagrams.
Journal ArticleDOI
New approaches for improving semiconductor gas sensors
TL;DR: In this paper, the authors demonstrated that the sensing characteristics of a semiconductor gas sensor using SnO2 can be improved by controlling fundamental factors which affect its receptor and transducer functions.
Journal ArticleDOI
Grain size effects on gas sensitivity of porous SnO2-based elements
TL;DR: In this paper, the effects of grain size on gas sensitivity were investigated by using porous sintered SnO2 elements fabricated with pure and impurity-doped SnO 2 elements.
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Chemical sensing with solid state devices
Marc J. Madou,S. Roy Morrison +1 more
TL;DR: Silicon Based Chemical Sensors as mentioned in this paper : Gas Sensors based on Semiconductor Powders are used for solid state chemical sensor applications, and they have been shown to be useful in many applications.