Show simple item record LUPAN, Oleg CHOW, Lee CHAI, Guangyu 2020-06-01T10:59:55Z 2020-06-01T10:59:55Z 2009
dc.identifier.citation LUPAN, Oleg, CHOW, Lee, CHAI, Guangyu. A single ZnO tetrapod-based sensor. In: Sensors and Actuators. B: Chemical, 2009, V. 141, Iss. 2, pp. 511-517. ISSN 0925-4005. en_US
dc.identifier.issn 0925-4005
dc.description Access full text - en_US
dc.description.abstract Transferable ZnO tetrapods were grown by an aqueous solution method. An individual ZnO tetrapod-based sensor was fabricated by in situ lift-out technique and its ultraviolet (UV) and gas sensing properties were investigated. This single tetrapod-based device responds to the UV light rapidly and showed a recovery time of about 23s. The sensitivity of a single ZnO tetrapod sensor to oxygen concentration was also investigated. We found that when UV illumination is switched off, the oxygen chemisorption process will dominate and assists photoconductivity relaxation. Thus relaxation dynamics is strongly affected by the ambient O2 partial pressure as described. We also studied the response of ZnO tetrapod-based sensor in various gas environments, such as 100ppm H2, CO, i-butane, CH4, CO2, and SO2 at room temperature. It is noted that ZnO tetrapod sensor is much more sensitive to H2, i-butane and CO. It is demonstrated that a ZnO tetrapod exposed to both UV light and hydrogen can provide a unique integrated multiterminal architecture for novel electronic device configurations. en_US
dc.language.iso en en_US
dc.publisher ELSEVIER en_US
dc.rights Attribution-NonCommercial-NoDerivs 3.0 United States *
dc.rights.uri *
dc.subject nanorods en_US
dc.subject tetrapods en_US
dc.subject UV sensors en_US
dc.subject gas sensors en_US
dc.subject zinc oxide en_US
dc.title A single ZnO tetrapod-based sensor en_US
dc.type Article en_US

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