Unique electrical properties of nanostructured diamond cones

The preparation and electrical properties of diamond nanocones are reviewed, including a maskless etching pro- cess and mechanism of large-area diamond conical nanostructure arrays using a hot filament chemical vapor deposition （HFCVD） system with negatively biased substrates, and the field electron...

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Bibliographic Details
Published in:Chinese physics B 2013-09, Vol.22 (9), p.111-119
Main Author: 顾长志 王强 李俊杰 夏钶
Format: Article
Language:English
Subjects:
Arrays
Cones
Density
Diamonds
Electrical properties
Electron emission
Etching
Gas sensors
Nanostructure
圆锥体
场致电子发射
实验参数
气体传感器
热丝化学气相沉积
电学性质
纳米金刚石
蚀刻气体
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Description
Summary:The preparation and electrical properties of diamond nanocones are reviewed, including a maskless etching pro- cess and mechanism of large-area diamond conical nanostructure arrays using a hot filament chemical vapor deposition （HFCVD） system with negatively biased substrates, and the field electron emission, gas sensing, and quantum transport properties of a diamond nanocone array or an individual diamond nanocone. Optimal cone aspect ratio and array density are investigated, along with the relationships between the cone morphologies and experimental parameters, such as the CH4/H2 ratio of the etching gas, the bias current, and the gas pressure. The reviewed experiments demonstrate the possi- bility of using nanostructured diamond cones as a display device element, a point electron emission source, a gas sensor or a quantum device.
ISSN:1674-1056
2058-3834
1741-4199
DOI:10.1088/1674-1056/22/9/098107