Nanoscale structural characteristics and electron field emission properties of transition metal-fullerene compound TiC60 films
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摘要Transition-metal compound TiC60 thin films were grown by co-deposition from two separated sources of fullerene C-60 powder and titanium. Study of structural properties of the films, by Raman spectroscopy, atomic force microscopy, and scanning tunneling spectroscopy reveals that the films have a deformed C-60 structure with certain amount of sp(3) bonds and a rough surface with a large number of nanoclusters. z-V tunnelling spectroscopic measurements suggest that several charge transport mechanisms are involved in as the tip penetrates into the thin film. Conventional field electron emission (FEE) measurements show a high emission current density of 10 mA/cm(2) and a low turn-on field less than 8 V/mum, with the field enhancement factors being 659 and 1947 for low-field region and high-field region, respectively. By exploiting STM tunneling spectroscopy, local FEE on nanometer scale has also been characterized in comparison with the conventional FEE. The respective field enhancement factors are estimated to be 99-355 for a gap varying from 36 to 6 nm. The enhanced FEE of TiC60 thin films can be ascribed to structural variation of C-60 in the films and the electrical conducting paths formed by titanium nanocrystallites embedded in C-60 matrix. (C) 2004 Elsevier Ltd. All rights reserved.
著者Chen J, Xu JB, Xue K, An J, Ke N, Cao W, Xia HB, Shi J, Tian DC
期刊名稱Microelectronics Reliability
出版年份2005
月份1
日期1
卷號45
期次1
出版社PERGAMON-ELSEVIER SCIENCE LTD
頁次137 - 142
國際標準期刊號0026-2714
語言英式英語
Web of Science 學科類別Engineering; Engineering, Electrical & Electronic; ENGINEERING, ELECTRICAL & ELECTRONIC; Nanoscience & Nanotechnology; NANOSCIENCE & NANOTECHNOLOGY; Physics; Physics, Applied; PHYSICS, APPLIED; Science & Technology - Other Topics

上次更新時間 2020-30-11 於 01:05