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- W2081128494 abstract "In this paper, sol-gel derived undoped p-type nanotitania thin films particularly aimed to detect low ppm (5-100 ppm) methanol at low temperature (75-150°C) is reported. Anantase TiO <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>2</sub> thin film was deposited by sol-gel technique and p-type conductivity of the film was confirmed by Hall measurement. Nanocrystalline structure (12-15 nm) of the TiO <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>2</sub> film was confirmed by X-ray diffraction study and field emission scanning electron microscopy, respectively. Photoluminance spectroscopy and X-ray photoelectron spectroscopy were employed to characterize the defect structure. Methanol sensor study was carried for detecting the concentration range of 5 to 100 ppm in the temperature range of 75 to 150°C. Highly promising sensing performance was observed at an optimum operating temperature of only 100°C with 102% response magnitude (in 100 ppm methanol) and appreciably fast response and recovery time (~18 and ~21 s, respectively). The possible mechanism behind the origin of p-type conductivity has been correlated with the defect distribution model. Detailed sensing mechanism of the p-nano-titania has been explained using Schottky barrier model." @default.
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- W2081128494 date "2015-01-01" @default.
- W2081128494 modified "2023-10-16" @default.
- W2081128494 title "Low Temperature Methanol Sensing by p-Type Nano-titania: Correlation with Defects States and Schottky Barrier Model" @default.
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- W2081128494 doi "https://doi.org/10.1109/tnano.2014.2376633" @default.
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