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arXiv · 1509.00203

Novel single phase vanadium dioxide nanostructured films for methane sensing near room temperature

A. K. Prasad·S. Amirthapandian·S. Dhara·S. Dash·N. Murali·A. K. Tyagi
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Abstract

Methane (CH_4) gas sensing properties of novel vanadium dioxide (VO_2) nanostructured films is reported for the first time. The single phase nanostructures are synthesized by pulsed dc-magnetron sputtering of V target followed by oxidation in O_2 atmosphere at 550 ^oC. The partial pressure of O_2 is controlled to obtain stoichiometric VO_2 with the samples showing rutile monoclinic crystalline symmetry and regions of rod shaped nano-architectures. These nanostructured films exhibit a reversible semiconductor to metal transition in the temperature range of 60-70 ^oC. Gas sensing experiments are carried out in the temperature span from 25 ^oC to 200 ^oC in presence of CH_4. These experiments reveal that the films respond very well at temperatures as low as 50 ^oC, in the semiconducting state.

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A. K. Prasad, S. Amirthapandian, S. Dhara, S. Dash, N. Murali, A. K. Tyagi. 2015-09-01. Novel single phase vanadium dioxide nanostructured films for methane sensing near room temperature. https://doi.org/10.1016/j.snb.2013.09.102

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