TY - JOUR
T1 - Hydrogen-passivated detonation nanodiamond
T2 - an impedance spectroscopy study
AU - Su, Shi
AU - Li, Jiangling
AU - Kundrát, Vojtěch
AU - Abbot, Andrew M.
AU - Ye, Haitao
PY - 2012/4
Y1 - 2012/4
N2 - 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.
AB - 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.
KW - chemical vapor deposition
KW - electrical conductivity
KW - impedance spectroscopy
KW - nanocrystalline
UR - http://www.scopus.com/inward/record.url?scp=84858332995&partnerID=8YFLogxK
U2 - 10.1016/j.diamond.2011.10.014
DO - 10.1016/j.diamond.2011.10.014
M3 - Article
AN - SCOPUS:84858332995
SN - 0925-9635
VL - 24
SP - 49
EP - 53
JO - Diamond and Related Materials
JF - Diamond and Related Materials
ER -