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Room Temperature Ethanol Sensing Properties of ZnO Nanorods Prepared using Electrospun Technique

Abstract

In recent years, designing of room temperature gas sensors has received a major attention from researchers considering their deployment for real time monitoring and power consumption. In this context, a novel and simple electrospun route has been proposed to control the growth of ZnO nanorods with definite planes for achieving enhanced room temperature response for ethanol vapor. The composite nanofibers (polyvinyl alcohol (PVA) – zinc oxide (ZnO)) transformed to hexagonal wurtzite structured ZnO nanorods with flat, sharp pencil and blunt end shaped morphologies. X-ray diffraction patterns revealed the formation of highly c-axis orientation with (002) (polar), and (100) (non-polar), and (101) (semi-polar) plane orientation towards flat and pencil tip ended ZnO nanorods respectively. The electrical parameters like carrier concentration, mobility, grain and grain boundary resistances and activation energy of the nanorods were measured and correlated with the room temperature (299 K) ethanol sensing performance of ZnO nanorods. The flat-end loosely populated nanorods showed higher sensing response of 26.4 for 500 ppm of ethanol and comparatively higher than previously reported response.

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Publication details

The article was received on 18 Aug 2017, accepted on 05 Sep 2017 and first published on 05 Sep 2017


Article type: Paper
DOI: 10.1039/C7TC03771F
Citation: J. Mater. Chem. C, 2017, Accepted Manuscript
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    Room Temperature Ethanol Sensing Properties of ZnO Nanorods Prepared using Electrospun Technique

    P. Shankar and J. B. B. Rayappan, J. Mater. Chem. C, 2017, Accepted Manuscript , DOI: 10.1039/C7TC03771F

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