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

作者：Bell Gavin R^*; Dawson Peter M; Pandey Priyanka A; Wilson Neil R; Mulheran Paul A

来源：APL Materials, 2014, 2(1): 012109.

DOI：10.1063/1.4862696

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.

• 出版日期2014-1