Microstructure of precipitated Au nanoclusters in single crystal MgO

C. M. Wang, S. Thevuthasan, V. Shutthanandan, A. Cavanagh, J. Walton, W. Jiang, W. J. Weber, L. E. Thomas, L. M. Wang, Jie Lian

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Gold nanoclusters dispersed in single crystal MgO were prepared by ion implantation and subsequent annealing at 1000 °C. The morphological feature, size, crystallographic orientation of the Au nanoclusters with respect to the MgO matrix, and the interface structure between the Au nanoclusters and MgO were investigated using transmission electron microscopy. During annealing, the Au clusters nucleate coherently in the MgO lattice, leading to an epitaxial orientation relationship of [010] MgO// [010] Au and (200) MgO//(200) Au that is maintained for all the Au clusters. A critical size for the coherent-semicoherent interface transition is observed to be in the range from ∼5 to 8 nm for Au clusters in MgO. Au clusters larger than this critical size exhibit faceting on the {001} planes. The precipitated Au also exhibits internal dislocations.

Original languageEnglish
Title of host publicationMaterials Research Society Symposium - Proceedings
EditorsJ. Piqueras, F.R. Zypman, D.A. Bonnell, A.P. Shreve
Pages305-309
Number of pages5
Volume738
Publication statusPublished - 2003
Externally publishedYes
EventSpatially Resolved Characterization of Local Phenomena in Materials and Nanostructures - Boston, MA, United States
Duration: 2 Dec 20026 Dec 2002

Other

OtherSpatially Resolved Characterization of Local Phenomena in Materials and Nanostructures
CountryUnited States
CityBoston, MA
Period2/12/026/12/02

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ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials

Cite this

Wang, C. M., Thevuthasan, S., Shutthanandan, V., Cavanagh, A., Walton, J., Jiang, W., Weber, W. J., Thomas, L. E., Wang, L. M., & Lian, J. (2003). Microstructure of precipitated Au nanoclusters in single crystal MgO. In J. Piqueras, F. R. Zypman, D. A. Bonnell, & A. P. Shreve (Eds.), Materials Research Society Symposium - Proceedings (Vol. 738, pp. 305-309)