Deoxidation of graphene oxide nanosheets to extended graphenites by “unzipping” elimination

摘要: Low-temperature scanning tunneling microscopy on alkyl-surface-functionalized graphene oxide nanosheets reveals the formation of low-dimensional graphenite nanostructures with extended π-conjugation at deoxidation temperatures above 150°C. The elimination these alkyl chains from surface does not occur uniformly, but in distinctive patterns that correspond to an underlying network one-dimensional “tracks” and “dots.” Atomic-resolution imaging regions a defective honeycomb lattice characteristic single-layer graphenes. These structures percolate nanosheet even for moderate levels regraphenization basal plane. conjugation indicates regioselective rather than random oxygen atoms chains. resultant morphology allows bandlike transport charge carriers across sheets despite defects disorder. sub-...