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Hybrid Gas Sensing and Transport Properties of Few-Walled CNTs Decorated with Discrete SnO2 Nanoparticles

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CVD grown, few walled carbon nanotubes (FWCNTs) were quasi decorated with SnO2 nanoparticles (FWCNTs-SnO2) and its gas sensing properties were analyzed with ammonia and ethanol. At room temperature FWCNTs-SnO2 show enhanced ‘p type’ gas sensing response than FWCNTs. Activation of SnO2 at high temperatures led to systematic changes in the sensing behavior towards ‘n type’ response. Temperature dependent transport behavior was found to be a one dimensional variable range hopping mechanism (1D-VRH) for the FWCNTs and a 3D-VRH mechanism for the FWCNTs-SnO2. These temperature dependent gas transport and sensing properties elucidate the hybrid nature of the nanocomposite with novel characteristics. This also implies its importance as a potential gas sensor material.
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Document Type: Research Article

Publication date: January 1, 2016

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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