標題: Fabrication of cone-shaped CNF/SiC-coated Si-nanocone composite structures and their excellent field emission performance
作者: Teng, I-Ju
Hsu, Hui-Lin
Jian, Sheng-Rui
Kuo, Cheng-Tzu
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
公開日期: 2012
摘要: Novel cone-shaped carbon nanofiber (CNF)/silicon carbide (SiC)-coated Si-nanocone (Si-NC) composite structures with excellent field emission (FE) performance have been fabricated by a simple microwave plasma chemical vapour deposition process. Transmission electron microscopy analyses reveal that the newly developed cone-shaped composite structures are composed of bamboo-like herringbone CNFs grown vertically on the tips of conical SiC layers with a flat-top Si cone embedded underneath. For this CNF/SiC-coated Si-NC composite array, a ultra-low threshold field of 0.32 V mu m(-1) (at 10 mA cm(-2)), a large emission current density of 668 mA cm(-2) at 1.05 V mu m(-1), and a field enhancement factor as high as similar to 48 349 are obtained. In addition, the FE lifetime test performed at a large emission current density of 200 mA cm(-2) under an applied field of 1 V mu m(-1) shows no discernible decay during a period of over 260 minutes. We deduce that this superior FE performance can be attributed to the specific bamboo-like herringbone CNFs with numerous open graphitic edges and a faceted top end, and the conical base SiC/ Si structures with sufficient adhesion to the substrate surface. Such a novel structure with promising emission characteristics makes it a potential material for electron field emitters.
URI: http://hdl.handle.net/11536/20706
http://dx.doi.org/10.1039/c2nr31511d
ISSN: 2040-3364
DOI: 10.1039/c2nr31511d
期刊: NANOSCALE
Volume: 4
Issue: 23
起始頁: 7362
結束頁: 7368
顯示於類別:期刊論文


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  1. 000310978900012.pdf