Proceedings ArticleDOI
CO Gas-Sensing at Low Temperature using CuO Thin Films
Sumita Choudhary,Ajay Agarwal,Arnab Hazra,Subhashis Gangopadhyay +3 more
- Vol. 2019, pp 1-4
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TLDR
In this paper, the authors focused on CO gas sensing behaviors of cupric oxide (CuO) nanostructures at relatively lower operating temperature (150°C) and showed significant sensitivity for 25 ppm CO gas with fast response and recovery times.Abstract:
Carbon monoxide (CO) is known as a silent killer, as breathing in CO gas ambient for long periods with a concentration above the tolerance limit can cause severe health hazards and even death. CO concentration as low as 30 ppm (parts per million) inhaling for few hours can significantly affects the human health. This work focuses on CO gas sensing behaviors of cupric oxide (CuO) nanostructures at relatively lower operating temperature (150°C). The sensors show significant sensitivity for 25 ppm CO gas with fast response and recovery times as well as good reproducibility. Firstly, thin copper films are vacuum deposited on glass substrates at room temperature. Afterwards, these films are thermally oxidized in air, using simple thermal oxidation technique. CO sensing properties of CuO thin film are evaluated for different operating temperatures (150-250°C) and concentrations. The CuO nanostructure shows the maximum CO sensitivity for an operating temperature of 230°C. However, CO response increases with the CO concentration, which is finally saturates for a particular operating temperature.read more
Citations
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Journal ArticleDOI
Comparative study on surface states and CO gas sensing characteristics of CuO thin films synthesised by vacuum evaporation and sputtering processes
Debashrita Mahana,Debashrita Mahana,Amit Kumar Mauraya,Amit Kumar Mauraya,Prabir Pal,Prabir Pal,Preetam Singh,Preetam Singh,Senthil Kumar Muthusamy,Senthil Kumar Muthusamy +9 more
TL;DR: In this article, single-phase polycrystalline CuO thin films with monoclinic crystalline structure and porous granular surface morphology are obtained by thermal oxidation of Cu films at 400°C for 5h, as characterized by x-ray diffraction and scanning electron microscopy.
Journal ArticleDOI
Gas sensing behavior of Cu2O and CuO/Cu2O composite nanowires synthesized by template-assisted electrodeposition
TL;DR: In this paper, the authors presented conductometric gas sensors based on Cu2O and CuO/Cu2O composite nanowires investigated towards few VOCs and CO gases.
References
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Journal ArticleDOI
Preparation and Electrochemical Performance of Polycrystalline and Single Crystalline CuO Nanorods as Anode Materials for Li Ion Battery
TL;DR: In this article, a simple and efficient approach is developed for the synthesis of copper oxide nanorods with different morphology and crystallographic structure, and the correlation between the structural features of the nanorod and their electrode performance is discussed in detail.
Journal ArticleDOI
The effects of thickness and operation temperature on ZnO:Al thin film CO gas sensor
TL;DR: In this article, the dependence of the thin film thickness on CO gas sensing properties was investigated, where the film thickness was varied by controlling the deposition time, and the structure of the deposited ZnO:Al films was determined by X-ray diffraction, scanning electron microscopy and atomic force microscopy.
Journal ArticleDOI
Gas sensors based on one dimensional nanostructured metal-oxides: a review.
TL;DR: This article reviews and evaluates the performance of 1-D nanostructured metal-oxide gas sensors based on ZnO, SnO 2, TiO2, In2O3, WOx, AgVO3, CdO, MoO 3, CuO, TeO2 and Fe2O2.
Journal ArticleDOI
Influence of humidity on CO sensing with p-type CuO thick film gas sensors
Michael Hübner,Cristian E. Simion,A. Tomescu-Stanoiu,Suman Pokhrel,Nicolae Bârsan,Udo Weimar +5 more
TL;DR: In this article, a model for the detection of CO in the presence of humidity is proposed for thick porous film gas sensors based on p-type CuO, which is investigated by means of simultaneous DC electrical resistance and work function changes measurements combined with appropriate modeling of conduction in the polycrystalline sensing film.
Journal ArticleDOI
Nano-crystalline Cu-doped ZnO thin film gas sensor for CO
TL;DR: In this paper, a Cu-doped ZnO (CZO) film was prepared on a glass substrate by co-sputtering using znO and Cu targets, which possessed a columnar structure consisting of small crystals with an average grain size of around 5 nm.
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