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

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.
Authors:
; ; ;  [1] ;  [2]
  1. Department of Physics, University of Warwick, Coventry CV4 7AL (United Kingdom)
  2. Department of Chemical and Process Engineering, University of Strathclyde, James Weir Building, 75 Montrose St., Glasgow G1 1XJ (United Kingdom)
Publication Date:
OSTI Identifier:
22269567
Resource Type:
Journal Article
Resource Relation:
Journal Name: APL Materials; Journal Volume: 2; Journal Issue: 1; Other Information: (c) 2014 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 77 NANOSCIENCE AND NANOTECHNOLOGY; DEPOSITION; DIFFUSION; ELECTRONS; GOLD; GRAPHENE; MOBILITY; MONTE CARLO METHOD; SPUTTERING; SUBSTRATES; SURFACES; TRANSMISSION ELECTRON MICROSCOPY