| Literature DB >> 26681838 |
Ting Xie1, Nichole Sullivan2, Kristen Steffens3, Baomei Wen4, Guannan Liu1, Ratan Debnath4, Albert Davydov3, Romel Gomez5, Abhishek Motayed6.
Abstract
TiO2 thin film based, chemiresistive sensors for NO2 gas which operate at room temperature under ultraviolet (UV) illumination have been demonstrated in this work. The rf-sputter deposited and post-annealed TiO2 thin films have been characterized by atomic force microscopy, X-ray photoelectron spectroscopy, and X-ray diffraction to obtain surface morphology, chemical state, and crystal structure, respectively. UV-vis absorption spectroscopy and Tauc plots show the optical properties of the TiO2 films. Under UV illumination, the NO2 sensing performance of the TiO2 films shows a reversible change in resistance at room-temperature. The observed change in electrical resistivity can be explained by the modulation of surface-adsorbed oxygen. This work is the first demonstration of a facile TiO2 sensor for NO2 analyte that operates at room-temperature under UV illumination.Entities:
Year: 2015 PMID： 26681838 PMCID： PMC4677394 DOI： 10.1016/j.jallcom.2015.09.021
Source DB: PubMed Journal: J Alloys Compd ISSN： 0925-8388 Impact factor: 5.316