The influence of ammonia on the electrical properties of detonation nanodiamond

被引：10

作者：

Bevilacqua, Mose

Chaudhary, Aysha

Jackman, Richard B. ^{[1
]}

机构：

[1] UCL, London Ctr Nanotechnol, London WC1H 0AH, England

来源：

JOURNAL OF APPLIED PHYSICS | 2009年 / 106卷 / 12期

基金：

英国工程与自然科学研究理事会;

关键词：

ammonia; chemical sensors; detonation; diamond; dielectric materials; doping; elemental semiconductors; grain boundaries; nanostructured materials; THIN-FILM DIAMOND; CVD DIAMOND; ELECTROCHEMICAL OXIDATION; GAS SENSOR; CARBON;

D O I：

10.1063/1.3272912

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Detonation nanodiamonds (DNDs) are an interesting class of materials for sensing applications, but little is currently understood about their electrical properties. Here, aggregated DNDs are explored with impedance spectroscopy and are found to offer near-to-ideal dielectric characteristics, which is intriguing given their nanostructure. When exposed to ammonia, two highly conductive pathways emerge through the material; these appear to be associated with grain boundary and grain interior processes, the latter potentially due to surface transfer doping. This process is reversible given modest temperature increases suggesting DNDs may offer a solid state electrical platform for ammonia sensing applications.

引用

页数：7

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