Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 222, Issue -, Pages 1257-1263Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2015.05.050
Keywords
CuO nanowires; Kelvin probe; Surface workfunction; Butanol sensing; Conductometric sensing; Electron affinity; P-type metal oxides
Funding
- European project ORAMA Oxide Materials Towards a Mature Post-silicon Electronics Era [NMP-2009-2.2.1]
- WIROX Oxide Nanostructures for Wireless Chemical Sensing
- PEOPLE MARIE CURIE ACTIONS
- International Research Staff Exchange Scheme
- European Community's 7th Framework Program [611887]
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We present a comparative study of gas sensing properties of p-type CuO nanowires, characterized by Kelvin Probe (KP) surface workfunction gas sensing and formal conductometric (chemoresistive) gas sensing schemes, with main emphasis on the detection performance of low concentrations of butanol. P-type CuO nanowires were prepared by thermal oxidation of Cu thin film in a controlled environment at oxidation temperatures of 300 degrees C and 400 degrees C. Structural characterizations of grown nanomaterials were carried out by X-ray diffraction, micro-Raman spectrophotometry and scanning electron microscopy (SEM). Butanol sensing responses recorded from both methods were compared and further analyzed to calculate approximate values of electron affinity variations. (C) 2015 Elsevier B.V. All rights reserved.
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