期刊
MATERIALS RESEARCH BULLETIN
卷 56, 期 -, 页码 80-85出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.materresbull.2014.04.014
关键词
Nanostructures; Optical materials; Crystal growth; X-ray diffraction
资金
- National Natural Science Foundation of China [51042010]
- Natural Science Key Project Foundation of Shaanxi Province, China [2013JZ018]
A layer-structure gallium nitride (GaN) nanowires, grown on Pt-coated n-type Si (111) substrate, have been synthesized using chemical vapor deposition (CVD). The results show: (1) SEM indicates that the geometry structure is layer-structure. HRTEM indicates that GaN nanowire's preferential growth direction is along [0 0 1] direction. (2) The room temperature PL emission spectrum of the layer-structure GaN nanowires has a peak at 375 nm, which proves that GaN nanowires have potential application in light-emitting nano-devices. (3) Field-emission measurements show that the layer-structure GaN nanowires film has a low turn-on field of 4.39 V/mu m (at room temperature), which is sufficient for electron emission devices, field emission displays and vacuum nano-electronic devices. The growth mechanism for GaN nanowires has also been discussed briefly. (C) 2014 Elsevier Ltd. All rights reserved.
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