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Abstract
The study of interaction of atomic hydrogen with quasi-monocrystalline pyrolytic graphite (QMPG) by means of temperature programmed thermal desorption (TPD), scanning tunnel microscopy (STM) and atomic force microscopy (AFM) revealed pronounced effects of atomic hydrogen sorption on the surface morphology. The initially flat graphite surface with well-ordered atomic structure was changed after sorption of hydrogen atoms into a rough one with "bumps" up to 5 nm in height and 100 nm in diameter. After thermal release of hydrogen the surface became again atomically flat with etch-pits 1–2 layers in depth. It is suggested that the sorbed atomic hydrogen is stored between graphene layers as H2 molecules.
Published Version
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