Physics – Condensed Matter – Materials Science
Scientific paper
2011-06-04
Physics
Condensed Matter
Materials Science
Scientific paper
The current paper opens a series of papers that are aimed at the determination of barriers that govern the covalent coupling between partners of C60-based composites consisting of two or more fullerenes C60 (C60 dimer and oligomers) (Part 1), C60 and single-walled carbon nanotube ([C60+(4,4)] carbon nanobud) (Part 2), and C60 and graphene ([C60+(5,5)] and [C60+(9,8)] graphene nanobuds) (Part 3). C60 dimers and oligomers are considered in the current paper. The formation of composites is considered from the basic points related to the regioselective chemical reactivity of the fullerene molecule atoms. The dissonance between the predicted trimer and tetramer structures and experimental observations is suggested to evidence the topological nature of the C60 oligomerization. The barrier that governs the oligomer formation is determined in terms of the coupling energy and is expanded over two contributions that present the total energy of deformation of the composites' components and the energy of covalent coupling . The computations were performed by using the AM1 semiempirical version of unrestricted broken symmetry Hartree-Fock approach.
Shaymardanova Landysh Kh
Sheka Elena F.
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