In this paper, we investigated the effect of hydrogen termination on the electrical properties and impedance spectra of detonation nanodiamond. The impedance spectra revealed that the hydrogen-termination process increases the electrical conductivity by four orders of magnitude at room temperature. An equivalent circuit has been proposed to correlate with the conduction mechanism. Arrhenius plot showed that there were two different activation energy levels located at 0.089 eV and 0.63 eV between 50 °C and 400 °C. The possible physical mechanism corresponding to these activation energy levels has been discussed. Hydrogen-terminated detonation nanodiamond has been further annealed at different temperatures prior to FTIR and XPS measurements in order to understand their thermal stability. The results demonstrated that the surface oxidization occurred between 100 °C and 150 °C. However, the C–H bonds could partially survive when the temperature reaches 400 °C in air.
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14 January 2013
Research Article|
January 10 2013
Hydrogen-terminated detonation nanodiamond: Impedance spectroscopy and thermal stability studies
Shi Su;
Shi Su
Nanoscience Research Group, Department of Electrical, Electronic and Power Engineering, School of Engineering and Applied Science,
Aston University
, Birmingham B4 7ET, United Kingdom
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Jiangling Li;
Jiangling Li
Nanoscience Research Group, Department of Electrical, Electronic and Power Engineering, School of Engineering and Applied Science,
Aston University
, Birmingham B4 7ET, United Kingdom
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Vojtěch Kundrát;
Vojtěch Kundrát
Nanoscience Research Group, Department of Electrical, Electronic and Power Engineering, School of Engineering and Applied Science,
Aston University
, Birmingham B4 7ET, United Kingdom
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Andrew M. Abbot;
Andrew M. Abbot
Nanoscience Research Group, Department of Electrical, Electronic and Power Engineering, School of Engineering and Applied Science,
Aston University
, Birmingham B4 7ET, United Kingdom
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a)
Author to whom correspondence should be addressed. Electronic mail: h.ye@aston.ac.uk.
J. Appl. Phys. 113, 023707 (2013)
Article history
Received:
October 13 2012
Accepted:
December 05 2012
Citation
Shi Su, Jiangling Li, Vojtěch Kundrát, Andrew M. Abbot, Haitao Ye; Hydrogen-terminated detonation nanodiamond: Impedance spectroscopy and thermal stability studies. J. Appl. Phys. 14 January 2013; 113 (2): 023707. https://doi.org/10.1063/1.4773830
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