The influence of ammonia on the electrical properties of detonation nanodiamond
The influence of ammonia on the electrical properties of detonation nanodiamond
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DOI：
10.1063/1.3272912
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发表时间：
2009-12
影响因子：
3.2
通讯作者：
M. Bevilacqua;A. Chaudhary;R. Jackman
中科院分区：
文献类型：
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作者：
M. Bevilacqua;A. Chaudhary;R. Jackman
爆炸纳米金刚石 (DND) 是一类有趣的传感应用材料，但目前对其电特性知之甚少。在这里，通过阻抗谱对聚集的 DND 进行了探索，发现其具有接近理想的介电特性，考虑到其纳米结构，这一点很有趣。当暴露于氨时，材料中会出现两条高导电通路：这些似乎与晶界和晶粒内部过程有关，后者可能是由于表面转移掺杂所致。鉴于温度适度升高，该过程是可逆的，这表明 DND 可以为氨传感应用提供固态电气平台。
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.