Microwave properties of nanodiamond particles
Microwave properties of nanodiamond particles
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DOI：
10.1063/1.4809823
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发表时间：
2013-06-17
影响因子：
4
通讯作者：
Williams, Oliver A.
中科院分区：
文献类型：
--
作者：
Slocombe, Daniel;Porch, Adrian;Williams, Oliver A.
纳米金刚石粉末的介电性能，其特征在于在微波频率使用腔微扰技术，并与紫外拉曼光谱的结果进行了比较。纳米金刚石样品中的表面sp（2）杂交通过随后的氧化和氢化而变化。介电极化和损耗随着sp（2）杂化的增加而增加。通过微波腔技术获得的对表面结合sp（2）碳的灵敏度远远超过可比技术（例如拉曼光谱），并且在实践中更加方便，从而使其本身适合于通过外部影响（例如温度和化学官能化）对这种粉末进行实时改性的研究。(C)2013 AIP Publishing LLC.
The dielectric properties of nanodiamond powders were characterised at microwave frequencies using a cavity perturbation technique, and results were compared with UV Raman spectroscopy. Surface sp(2) hybridisation in the nanodiamond samples was varied by subsequent oxygenation and hydrogenation. Dielectric polarisation and loss increased as the sp(2) hybridisation was increased. The sensitivity to surface bound sp(2) carbon obtained by the microwave cavity technique far exceeds that of comparable techniques (such as Raman spectroscopy) and is much more convenient in practice, lending itself to studies of real-time modification of such powders by external influences (such as temperature and chemical functionalisation). (C) 2013 AIP Publishing LLC.