1.4.5 The Electronic Nose: The Effect of Metal Oxide Modifications to Well-Aligned ZnO Nanowire Arrays for Highly Sensitive and Selective Gas Detection
Year: 2012
Type: conference-paper
Abstract: To mimic biological olfactory receptor arrays, a three dimensional (3D) "electronic nose" was fabricated by using well-aligned ZnO nanowire arrays modified with different metal oxides.Metal oxide nanowire arrays share 3D structures similar to mammalian olfactory receptor arrays, with thousands of vertically aligned nanowires providing a high reception area which can significantly enhance the sensors' sensitivity.Meanwhile, with different material decorations, each array of nanowires can produce a distinguishable response for each separate analyte, which would provide a promising way to improve the selectivity.We have successfully fabricated gas sensors based on SnO 2 , In 2 O 3 , and WO 3 coatings which have discriminated five gases which are NO 2 , H 2 S, H 2 , NH 3 , and CO.The sensitivity to NO 2 and H 2 S has reached down to the ppb level.
Source: Proceedings IMCS 2012
Authors: Haigio Su, Jiajun Chen, Kai Wang, Alaoddin Ahmad Ayyad, Weilie Zhou
Institution: LSU New Orleans
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W862540486