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The uniqueness of physical and chemical natures of graphene: Their coherence and conflicts
Author(s) -
Sheka Elena F.
Publication year - 2014
Publication title -
international journal of quantum chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.484
H-Index - 105
eISSN - 1097-461X
pISSN - 0020-7608
DOI - 10.1002/qua.24673
Subject(s) - graphene , chemical physics , valence electron , materials science , valence (chemistry) , electron , physics , nanotechnology , condensed matter physics , quantum mechanics
Molecular‐crystalline duality of graphene ensures a tight alliance of its physical and chemical natures, each of which is unique in its own way. The article examines the physical‐chemical harmony and/or confrontation in terms of the molecular theory of graphene. Chemistry that is consistent with graphene physics expectations involves: small mass of carbon atoms, which provides a lightweight material; sp 2 configuration of the atoms valence electrons, ensuring a flat two‐dimensional structure of condensed benzenoid units; high strength of CC valence bonds responsible for exclusive mechanical strength. Chemistry that is in conflict with graphene physics expectations covers: radical character of graphene material; collective character of electronic system of graphene, preventing from localization of its response on any external impact; the molecular nature and topochemical character of graphene mechanics; the molecular nature of graphene magnetism. Each of the properties is a direct consequence of the odd electron correlation, on one hand, and ensures a high instability of graphene material, on the other. Electron correlation inhibition by deposition of graphene monolayers on substrates is seen as a promising way to solve the problem. © 2014 Wiley Periodicals, Inc.