Gigantic enhancement in response and reset time of ZnO UV nanosensor by utilizing Schottky contact and surface functionalization

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Title:	Gigantic enhancement in response and reset time of ZnO UV nanosensor by utilizing Schottky contact and surface functionalization
Author:	Zhou, Jun ; Gu, Yudong ; Hu, Youfan ; Mai, Wenjie ; Yeh, Ping-Hung ; Bao, Gang ; Sood, Ashok K. ; Polla, Dennis L. ; Wang, Z. L. (Zhong Lin)
Abstract:	UV response of ZnO nanowire nanosensor has been studied under ambient condition. By utilizing Schottky contact instead of Ohmic contact in device fabrication, the UV sensitivity of the nanosensor has been improved by four orders of magnitude, and the reset time has been drastically reduced from ~417 to ~0.8 s. By further surface functionalization with function polymers, the reset time has been reduced to ~20 ms even without correcting the electronic response of the measurement system. These results demonstrate an effective approach for building high response and fast reset UV detectors.
Description:	©2009 American Institute of Physics. The electronic version of this article is the complete one and can be found online at: http://link.aip.org/link/?APPLAB/94/191103/1 DOI: 10.1063/1.3133358
Type:	Article
URI:	http://hdl.handle.net/1853/30242
ISSN:	0003-6951
Citation:	Jun Zhou, Yudong Gu, Youfan Hu, Wenjie Mai, Ping-Hung Yeh, Gang Bao, Ashok K. Sood, Dennis L. Polla, and Zhong Lin Wang, "Gigantic enhancement in response and reset time of ZnO UV nanosensor by utilizing Schottky contact and surface functionalization," Applied Physics Letters 94 (2009) 191103
Date:	2009-05-11
Contributor:	Georgia Institute of Technology. School of Materials Science and Engineering Georgia Institute of Technology. Dept. of Biomedical Engineering Emory University. Dept. of Biomedical Engineering Magnolia Optical Technologies Peking University. Dept. of Advanced Materials and Nanotechnology United States. Defense Advanced Research Projects Agency
Publisher:	Georgia Institute of Technology American Institute of Physics

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Center for Nanoscience and Nanotechnology Publications [105]

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