The formation of Au nanoclusters in MgO using ion implantation and subsequent annealing has been investigated. Approximately 1200 and 1400 Au2? ions/nm2 were implanted in MgO(100) substrates at 300 and 975 K, respectively. Subsequent annealing in air for 10 hours at 1275 K promoted the formation of Au nanostructures in MgO. The sample implanted at 300 K showed severe radiation damage. In addition, two-dimensional platelet-like structures with possible composition of Au and MgO were formed during implantation in the sample that was implanted at 300 K. In contrast, Au implantation at 975 K promoted the nucleation of Au nanostructures during implantation. Subsequent annealing of both samples show three-dimensional clusters in MgO. However, the 975 K implanted sample shows clean high quality single crystal Au clusters that have an epitaxial relationship to MgO(100).
Revised: July 26, 2004 |
Published: May 1, 2004
Citation
Thevuthasan S., V. Shutthanandan, C.M. Wang, W.J. Weber, W. Jiang, A.S. Cavanagh, and J. Lian, et al. 2004.Ion-Beam Synthesis of Epitaxial Au Nanocrystals in MgO.Journal of Materials Research 19, no. 5:1311-1314.PNNL-SA-40583.