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- W2562270137 abstract "Selective detection of vapor species, specially belonging to the same group, is a major constraint for resistive sensor devices. In this paper, selective alcohol (methanol, ethanol and 2-propanol) detection of Pd/TiO 2 nanorod array/Ti (Metal-Insulator-Metal) device in capacitive mode was achieved by a resonant frequency tuning technique. The resonant frequency, for optimal sensing, is identified through the imaginary part of the impedance (−|Z|sinθ as a function of frequency) in air and in alcohols. This revealed a shifting in resonant frequency towards lower frequency regime upon exposure to alcohols. Moreover, the difference in the resonant frequencies (Δf) from one alcohol to another were found to be almost constant which facilitated the frequency selective sensing even for varying concentrations of target species (1 ppm, 50 ppm and 100 ppm in present case). Such frequency selective nature of the device possibly originated from different degree of polarization of different alcohol molecules at different frequencies which was duly correlated to the corresponding equivalent circuit model." @default.
- W2562270137 created "2017-01-06" @default.
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- W2562270137 date "2016-10-01" @default.
- W2562270137 modified "2023-09-23" @default.
- W2562270137 title "Resonant frequency tuning technique for selective detection of alcohols by TiO<inf>2</inf> nanorod based capacitive device" @default.
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- W2562270137 doi "https://doi.org/10.1109/nmdc.2016.7777080" @default.
- W2562270137 hasPublicationYear "2016" @default.
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