Abstract
We have investigated the low-energy (100 eV) D+ and H + ion irradiation effects on the structural and chemical properties of highly oriented pyrolytic graphite (HOPG). Structural disorder due to the ion irradiation was identified by the Raman spectroscopy, the D+ irradiation giving rise to greater structural disorder than the H+ irradiation. Only sp2 bonding was identified in the X-ray photoemission spectroscopy of the D+-irradiated HOPG, indicating no change in the surface chemical structure. The H+ irradiation, on the other hand, gave rise to sp3 bonding and π - π * transition, the sp3 bonding increasing with increasing irradiation dose. It is thus shown that the chemical properties of the HOPG surface may be sensitively modified by the low-energy H+ ion irradiation, but not by the low-energy D+ ion irradiation.
Original language | English |
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Article number | 214310 |
Journal | Journal of Applied Physics |
Volume | 114 |
Issue number | 21 |
DOIs | |
Publication status | Published - 2013 Dec 7 |
Bibliographical note
Funding Information:This work was supported by the National Research Foundation of Korea (Project No. 2013057555, 201234770, and NRF-2010-0027963). The measurements at the Korean Basic Science Institute (KBSI) are acknowledged.
ASJC Scopus subject areas
- General Physics and Astronomy