標題: Field Emission Properties of Gold Nanoparticle-Decorated ZnO Nanopillars
作者: Chang, Yuan-Ming
Lin, Man-Ling
Lai, Tung-Yen
Lee, Hsin-Yi
Lin, Chih-Ming
Wu, Yew-Chung Sermon
Juang, Jenh-Yih
材料科學與工程學系
電子物理學系
Department of Materials Science and Engineering
Department of Electrophysics
關鍵字: ZnO nanopillars;vapor transport deposition;Au nanoparticles;field emission;turn-on field;current density
公開日期: 1-十二月-2012
摘要: The structural and optoelectronic properties of ZnO nanopillars (ZnO-NPs) grown on Si substrates by the vapor transport deposition method were investigated. In particular, by varying the deposition duration and hence the morphology of the vertically aligned ZnO-NPs, the resultant field emission characteristics were systematically compared. In addition to identifying the advantageous field emission properties exhibited in the pencil-like ZnO-NPs, we observed that by adhering Au nanoparticles on the surface of the ZnO-NPs the turn-on field and the maximum current density can be drastically improved from 3.15 V/mu m and 0.44 mA/cm(2) at 5 V/mu m for the best ZnO-NPs to 2.65 V/mu m and 2.11 mA/cm(2) at 5 V/mu m for Au/ZnO-NPs, respectively. The enhancement of field emission characteristics that resulted from Au-nanoparticle decoration is discussed on the basis of charge-transfer-induced band structure modifications.
URI: http://dx.doi.org/10.1021/am301848a
http://hdl.handle.net/11536/20923
ISSN: 1944-8244
DOI: 10.1021/am301848a
期刊: ACS APPLIED MATERIALS & INTERFACES
Volume: 4
Issue: 12
起始頁: 6675
結束頁: 6681
顯示於類別:期刊論文


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