This article is cited in 5 papers

CONDENSED MATTER

Structure and stability of two-dimensional systems of C₂₀ fullerenes

I. V. Davydov, A. I. Podlivaev, L. A. Openov

Moscow Engineering Physics Institute (State University), Kashirskoe sh. 31, Moscow, 115409, Russia

Abstract: Two-dimensional systems of C₂₀ fullerenes connected to each other by strong covalent bonds have been investigated. Several isomers differing in the type of intercluster bonds have been revealed. The lifetimes τ of the (C₂₀) _{M × M} complexes with M = 2 and 3 at T = 1800–3300 K have been directly calculated using the molecular dynamics method. It has been shown that these complexes lose their periodic cluster structure due usually to the coalescence of two or several neighboring C₂₀ fullerenes. The activation energy of this process determined by analyzing the τ(T) dependence appears to be E _a ≈ 2.5 eV in agreement with the calculations of the heights of the potential barriers preventing the coalescence. At high temperatures T > 2400 K, the decay of C₂₀ fullerenes entering into the complex is possible.

PACS: 36.40.Qv, 61.48.+c, 71.15.Pd

Received: 06.02.2008
Revised: 06.03.2008

 English version: Journal of Experimental and Theoretical Physics Letters, 2008, 87:7, 385–389

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