Field electron emission from bunchy flake-like nano-carbon films

• 来源期刊: 中国物理B（英文版）
• 关键词: bunchy flake-like nano-graphite crystallites films chemical vapour deposition electron field emission
• 年，卷（期）: 2009,（5）
• 页码范围: 2078-2081
• 页数: 4页
• 语种: 英文

摘要

This paper reports that bunchy flake-like nano-graphite crystallite films (BNGCFs) were deposited on Si substrates by using the microwave chemical vapour deposition technique. FtLrthermore the BNGCFs were characterized by x-ray diffraction spectra, scanning electron microscopy, Raman spectra and field emission (FE) Ⅰ-Ⅴ measurements, and a lowest turn-on field of 1.5 V/μm, and a high average emission current density of 30 mA/cm2 at a macroscopic electric field of 8.0 V/μm were obtained. The J-E data did not follow the original Fowler-Nordheim (F-N) relation since they were not well represented in the F-N plot by a straight line. A model considering the F-N mechanism, and the statistic effects of FE tip structures has been applied successfully to explain all the FE data observed for E < 8.SV/μm.