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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Comparative study of gas sensor performance of SnO2 nanowires and their hierarchical nanostructures
TL;DR: In this article, a hierarchical SnO2 nanowires (NWs) were synthesized by two different thermal evaporation processes and hierarchical nanostructures were prepared through a combination of the two processes without reseeding of Au catalyst.
Journal ArticleDOI
Ultrasensitive NO2 Sensor Based on Ohmic Metal–Semiconductor Interfaces of Electrolytically Exfoliated Graphene/Flame-Spray-Made SnO2 Nanoparticles Composite Operating at Low Temperatures
Nantikan Tammanoon,Anurat Wisitsoraat,Chakrit Sriprachuabwong,Ditsayut Phokharatkul,Adisorn Tuantranont,Sukon Phanichphant,Chaikarn Liewhiran +6 more
TL;DR: The electrolytically exfoliated graphene-loaded FSP-made SnO2 sensor is a highly promising candidate for fast, sensitive, and selective detection of NO2 at low operating temperatures.
Journal ArticleDOI
Influence of Texture Coefficient on Surface Morphology and Sensing Properties of W-Doped Nanocrystalline Tin Oxide Thin Films
TL;DR: The gas sensing results indicate that, as compared to pure SnO2, 1 wt % W-doping improves sensitivity along with better response and recovery time toward NO2 gas at operating temperatures of ∼225 °C.
Journal ArticleDOI
Facile synthesis and gas sensing properties of tubular hierarchical ZnO self-assembled by porous nanosheets
TL;DR: In this article, a three-dimensional hierarchical porous ZnO with tubular structure has been prepared by calcining a tubular hierarchical hydrozincite precursor, which was obtained through in situ growth of nanosheets on an as-synthesized template of zinc complex nanotubes at room temperature.
Journal ArticleDOI
Surface Morphology-Dependent Room-Temperature LaFeO3 Nanostructure Thin Films as Selective NO2 Gas Sensor Prepared by Radio Frequency Magnetron Sputtering
TL;DR: The gas-sensing measurements demonstrate that the LaFeO3 sensing material is an outstanding candidate for NO2 detection, attributed to their porous structure, surface morphology, numerous surface active sites, and the oxygen vacancies.
References
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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.