Creation of nanodiamonds by single impacts of highly charged ions upon graphite

Meguro, T.; Hida, A.; Suzuki, M.; Koguchi, Y.; Takai, H.; Yamamoto, Y.; Maeda, K.; Aoyagi, Y.
December 2001
Applied Physics Letters;12/3/2001, Vol. 79 Issue 23, p3866
Academic Journal
The local modification of the electronic states of highly oriented pyrolytic graphite (HOPG) surfaces using highly charged ion (HCI) irradiation has been demonstrated as a promising technique in the design of nanoscale materials. The high potential energy of HCI and subsequent surface treatment by either electron injection from a scanning tunneling microscopy (STM) tip or by He–Cd laser irradiation provide a localized transition from sp[sup 2] to sp[sup 3] hybridization in HOPG, resulting in the formation of nanoscale diamond-like structures (nanodiamond). It is of interest that a single impact of HCI creates one nanodiamond structure without inducing any defects in the area surrounding the impact region, suggesting potential applications of HCI in nanoscale material processing. © 2001 American Institute of Physics.


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