Size-dependent mobility of gold nano-clusters during growth on chemically modified graphene | Zendy

Gavin R. Bell | Zendy; Peter Dawson | Zendy; Priyanka Pandey | Zendy; Neil R. Wilson | Zendy; Paul A. Mulheran | Zendy

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Size-dependent mobility of gold nano-clusters during growth on chemically modified graphene

Author(s) -

Gavin R. Bell,

Peter Dawson,

Priyanka Pandey,

Neil R. Wilson,

Paul A. Mulheran

Publication year - 2014

Publication title -

apl materials

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.571

H-Index - 60

ISSN - 2166-532X

DOI - 10.1063/1.4862696

Subject(s) - cluster (spacecraft) , materials science , graphene , chemical physics , diffusion , transmission electron microscopy , nano , surface diffusion , kinetic monte carlo , cluster size , nanotechnology , nanostructure , monte carlo method , condensed matter physics , adsorption , chemistry , electronic structure , physics , thermodynamics , composite material , statistics , mathematics , computer science , programming language

Gold nano-clusters were grown on chemically modified graphene by direct sputter deposition. Transmission electron microscopy of the nano-clusters on these electron-transparent substrates reveals an unusual bimodal island size distribution (ISD). A kinetic Monte Carlo model of growth incorporating a size-dependent cluster mobility rule uniquely reproduces the bimodal ISD, providing strong evidence for the mobility of large clusters during surface growth. The cluster mobility exponent of −5/3 is consistent with cluster motion via one-dimensional diffusion of gold atoms around the edges of the nano-clusters

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