Hydrogen-terminated detonation nanodiamond:impedance spectroscopy and thermal stability studies

Su, She, Li, Jiangling, Kundrát, Vojtěch, Abbot, Andrew M. and Ye, Haitao (2013). Hydrogen-terminated detonation nanodiamond:impedance spectroscopy and thermal stability studies. Journal of Applied Physics, 113 (2),

Abstract

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.

Publication DOI: https://doi.org/10.1063/1.4773830
Divisions: Engineering & Applied Sciences > Electrical, Electronic & Power Engineering
Aston University (General)
Additional Information: © 2013 American Institute of Physics. Funding: EPSRC (EP/H034269/1).
Full Text Link: http://scitatio ... .1063/1.4773830
Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
Published Date: 2013-01-14
Authors: Su, She
Li, Jiangling
Kundrát, Vojtěch
Abbot, Andrew M.
Ye, Haitao ( 0000-0002-4005-4922)

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