In this work, we discuss the effect of low energy Ar + ion bombardment on highly oriented pyrolytic graphite (HOPG). The evolution of the G and D peak intensities are analyzed as a function of ion dose, as well as the evolution of a broad density‐of‐states (DOS)‐like background. For low ion doses, a small D band is observed. It increases and finally gives place to the broad DOS‐like feature. The I D / I G analysis clearly shows three distinct regimes. No frequency shifts are observed, indicating sp 2 bondings are mostly preserved. Comparison between preliminary work on single‐layer graphene and HOPG shows the effect observed in HOPG is limited to the top surface.
No takes yet. Share an insight, caveat, or question.
Jório et al. (2009) studied this question.