Stochastic analysis of movements on surfaces: The case of C60 on Au(111)

被引：9

作者：

Saendig, Nadja ^{[1
]}

Bakalis, Evangelos ^{[1
]}

Zerbetto, Francesco ^{[1
]}

机构：

[1] Univ Bologna, Dipartimento Chim G Ciamician, I-40126 Bologna, Italy

来源：

CHEMICAL PHYSICS LETTERS | 2015年 / 633卷

关键词：

STRONG ANOMALOUS DIFFUSION; ENERGY MINIMIZATION; MOLECULAR-MECHANICS; MEMBRANE SURFACES; GOLD SURFACE; LEVY FLIGHTS; RANDOM-WALKS; DYNAMICS; ORIGIN; SUBDIFFUSION;

D O I：

10.1016/j.cplett.2015.05.042

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Molecular dynamics simulations of C-60 on Au(1 1 1) reveal that the molecular diffusion consists of random sequences of stick, slide, and stick and slip periods. Stochastic analysis of forty trajectories shows that initially C-60 follows a superdiffusive-sub-ballistic-like motion, which then turns into super-diffusive. Individual trajectories present a variety of diffusive motions that even include subdiffusion. The analysis of the displacement moments indicates Fractional Brownian motion (FBM), as underlying stochastic mechanism, a finding further supported by the analysis of the velocity correlation function. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：163 / 168

页数：6

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