Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/34323
Title: Optical and sensor properties of ZnO nanostructure grown by thermal oxidation in dry or wet nitrogen
Authors: Xu, CH
Lui, HF
Surya, C 
Keywords: Ethanol
Gas sensor
Oxidation
Photoluminescence
Recovery
ZnO nanowire
Issue Date: 2012
Publisher: Springer
Source: Journal of electroceramics, 2012, v. 28, no. 1, p. 27-33 How to cite?
Journal: Journal of electroceramics 
Abstract: Zn films on glass were oxidized at 390°C in dry or wet N 2. As-prepared ZnO oxides were characterized by a scanning electron microscope (SEM), an X-ray diffractometer (XRD), a transmission electron microscope (TEN) and photoluminescence (PL) measurements. Gold electrodes were deposited on ZnO films to obtain ZnO gas sensors, which were characterized by exposure to ethanol at room temperature. The results show that the specimen oxidized in dry N 2 exhibits a sharp PL peak at 380 nm whereas that oxidized in wet N 2 exhibits a broad peak at 490 nm. The sensors demonstrate significant sensitivity to ethanol vapor at room temperature with a detection limit of 200 ppm for the sensor with ZnO oxidized in wet N 2. Recovery for the sensor with ZnO oxidized in wet N 2 can be achieved by illumination with natural light. However, for the sensor with ZnO oxidized in dry N 2, ultraviolet (UV) radiation is needed for recovery.
URI: http://hdl.handle.net/10397/34323
ISSN: 1385-3449
EISSN: 1573-8663
DOI: 10.1007/s10832-011-9674-3
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