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Effect of oxygen and nitrogen functionalization on the physical and electronic structure of graphene 被引量:3
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作者 Alexander J. Marsden Peter Brommer +9 位作者 James J. Mudd M. Adam Dyson Robert Cook Maria Asensio Jose Avila Ana Levy Jeremy Sloan David Quigley Gavin R. Bell Neil R. Wilson 《Nano Research》 SCIE EI CAS CSCD 2015年第8期2620-2635,共16页
Covalent functionalization of graphene offers opportunities for tailoring its properties and is an unavoidable consequence of some graphene synthesis techniques. However, the changes induced by the functionalization a... Covalent functionalization of graphene offers opportunities for tailoring its properties and is an unavoidable consequence of some graphene synthesis techniques. However, the changes induced by the functionalization are not well understood. By using atomic sources to control the extent of the oxygen and nitrogen functionalization, we studied the evolution in the structure and properties at the atomic scale. Atomic oxygen reversibly introduces epoxide groups whilst, under similar conditions, atomic nitrogen irreversibly creates diverse functionalities including substitutional, pyridinic, and pyrrolic nitrogen. Atomic oxygen leaves the Fermi energy at the Dirac point (i.e., undoped), whilst atomic nitrogen results in a net n-doping; however, the experimental results are consistent with the dominant electronic effect for both being a transition from delocalized to localized states, and hence the loss of the signature electronic structure of graphene. 展开更多
关键词 GRAPHENE FUNCTIONALIZATION chemical vapor deposition density functional theory
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