Hydrogen-passivated detonation nanodiamond: an impedance spectroscopy study

Shi Su, Jiangling Li, Vojtěch Kundrát, Andrew M. Abbot, Haitao Ye*

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

Detonation nanodiamond (DND) is an attractive class of diamond material, which has a great potential to be used for a wide range of applications. In this paper, untreated DND was employed to perform hydrogen passivation process using microwave plasma enhanced chemical vapor deposition in order to investigate the influence of hydrogen-terminated surface on the DND's electrical properties. Impedance spectroscopy (IS) has been used to characterize the electrical properties of DND samples using a newly-developed measurement set-up. It is found that hydrogen-passivation process has increased the electrical conductivity of the DND by up to four orders of magnitude when compared with the untreated sample. An RC parallel equivalent circuit with a Warburg element has been proposed to model the DND's impedance characteristics.

Original languageEnglish
Pages (from-to)49-53
Number of pages5
JournalDiamond and Related Materials
Volume24
Early online date18 Nov 2011
DOIs
Publication statusPublished - Apr 2012

Keywords

  • chemical vapor deposition
  • electrical conductivity
  • impedance spectroscopy
  • nanocrystalline

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