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Title: | Multi-Layered TiO2 Nanotubes Array-Based Highly Sensitive Room-Temperature Vapor Sensors |
Authors: | Hazra, Arnab |
Keywords: | EEE TiO $_{2}$ Nanotubes Multi-layered Room temperature sensing High sensitivity |
Issue Date: | Oct-2018 |
Publisher: | IEEE |
Abstract: | Single-, double-, and triple-layered TiO 2 nanotubes (NTs) array were synthesized by using a voltage pulse-assisted anodic oxidation technique. Morphological and structural evolution of different NTs have been studied by field-emission scanning electron microscopy and X-ray diffraction spectroscopy. “Au/TiO 2 NT layer(s)/Ti” types vertical structured sensors were fabricated and characterized at room temperature (300 K) toward multiple volatile organic compounds (VOCs) and high sensitivity was observed at low concentration (40-160 ppm) of VOCs. Response magnitude was increased with increase of number of layer(s) and found maximum of ~96% at 160 ppm of ethanol for triple-layered NTs. Efficient sensing was achieved for multi-layered TiO 2 NTs due to the benefits of 1) incremental effective surface area and 2) Schottky barrier effect at interlayer junctions. |
URI: | https://ieeexplore.ieee.org/document/8502936 http://dspace.bits-pilani.ac.in:8080/xmlui/handle/123456789/9647 |
Appears in Collections: | Department of Electrical and Electronics Engineering |
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