Electrical properties of aggregated detonation nanodiamonds
Electrical properties of aggregated detonation nanodiamonds
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DOI：
10.1063/1.2996026
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发表时间：
2008-09-29
影响因子：
4
通讯作者：
Jackman, Richard B.
中科院分区：
文献类型：
--
作者：
Bevilacqua, Mose;Patel, Sameer;Jackman, Richard B.
使用爆炸过程形成的纳米级金刚石是一类有趣的金刚石材料。商业供应的材料高度聚集，具有类似于5nm的金刚石晶体，形成具有微米尺寸的颗粒。以前的模型表明，非金刚石碳被纳入晶体之间，这将降低这种形式的金刚石的电气和化学有用性。然而，使用阻抗谱，我们已经表明，在低于350摄氏度的温度下，所研究的爆轰纳米金刚石的形式是接近理想的电介质，这意味着完全的sp（3）形式。在高于此温度下，金刚石晶体的表面可能支持一些非金刚石碳。(C)2008年美国物理学会。
Nanometer-scale diamonds formed using a detonation process are an interesting class of diamond materials. Commercially supplied material is highly aggregated with similar to 5 nm diamond crystals forming particles with micron sizes. Previous models have suggested that nondiamond carbon is incorporated between the crystals, which would reduce the electrical and chemical usefulness of this form of diamond. However, using impedance spectroscopy we have shown that at temperatures below 350 degrees C the form of detonation nanodiamond being studied is a near to ideal dielectric, implying a full sp(3) form. At temperatures above this the surfaces of the diamond crystals may support some nondiamond carbon. (C) 2008 American Institute of Physics.