AC behavior of intrinsic nanocrystalline diamond films

被引：3

作者：

Giorgi, L.

Giorgi, R.

Gianoglio, S.

Lisi, N.

Feliciangeli, M. C.

Rossi, M. C.

Conte, G.

机构：

[1] Univ Roma Tre, Dept Elect Engn, I-00146 Rome, Italy

[2] ENEA, CR Casaccia, I-00060 Rome, Italy

来源：

关键词：

AC measurements; grain boundary; admittance spectroscopy; nanocrystalline diamond;

D O I：

10.1016/j.diamond.2006.12.026

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Nanocrystalline diamond was prepared by hot filament assisted chemical vapor deposition technique. The nanometer sized dimension of diamond grains was determined by X-ray line broadening. AC electrical response of deposits, constituted by well formed diamond grains, was studied by admittance spectroscopy at different temperatures. Grain boundary and grain surface were considered different regions able to influence differently the frequency dependent AC response. Observed variations in admittance spectra were attributed to a modification of the grain surface response as frequency and temperature rise. A semiconductor to metal-like transition was evidenced in admittance spectra increasing the frequency of applied signal at lower temperatures. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：935 / 939

页数：5

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