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

Gavin R. Bell, Peter M. Dawson, Priyanka A. Pandey, Neil R. Wilson, Paul Mulheran

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Abstract

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.
Original languageEnglish
Article number012109
Number of pages8
JournalMaterials
Volume2
Issue number1
DOIs
Publication statusPublished - 24 Jan 2014

Keywords

  • thin film growth
  • gold
  • gold nano clusters
  • transmission electron microscopy

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    Bell, G. R., Dawson, P. M., Pandey, P. A., Wilson, N. R., & Mulheran, P. (2014). Size-dependent mobility of gold nano-clusters during growth on chemically modified graphene. Materials, 2(1), [012109]. https://doi.org/10.1063/1.4862696