Microstructure of precipitated Au nanoclusters in TiO 2

C. M. Wang, V. Shutthanandan, Y. Zhang, D. R. Baer, L. E. Thomas, S. Thevuthasan

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

1 Citation (Scopus)

Abstract

Gold nanoclusters dispersed in single crystal TiO 2 (110) have been formed by 2MeV Au 2+ implantation to an ion fluence of 1×10 17 cm -2 at 300 K and 975 K followed by annealing at 1275 K for 10 hours. The morphological features, size and crystallographic orientation of the Au nanoclusters with respect to the TiO 2 matrix have been investigated using conventional transmission electron microscopy and electron diffractions. In particular, the interface structure between the Au nanoclusters and TiO 2 was investigated. Atomic structural model of interface between Au and TiO 2 was established based on high-resolution transmission electron microscopy (HRTEM) imaging and HRTEM image simulations. Two types of orientation relationship can be identified, Au<110>//TiO 2[001] and Au{111}//TiO 2(200), and Au<110>//TiO 2[001] and Au{111}//TiO 2(110). Au clusters are faceted along Au{112}and Au{ 111} or Au {220} and Au{002} planes. The precipitated Au clusters show extensive (111) twins. These orientation relationships are the same for Au clusters grown on TiO 2(110) surface, indicating that lowering interfacial energy to be a governing factor for setting the orientation relationship.

Original languageEnglish
Title of host publicationMaterials Research Society Symposium - Proceedings
EditorsS. Komarneni, J.C. Parker, J.J. Watkins
Pages249-253
Number of pages5
Volume788
Publication statusPublished - 2003
Externally publishedYes
EventContinuous Nanophase and Nanostructured Materials - Boston, MA., United States
Duration: 1 Dec 20035 Dec 2003

Other

OtherContinuous Nanophase and Nanostructured Materials
CountryUnited States
CityBoston, MA.
Period1/12/035/12/03

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ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials

Cite this

Wang, C. M., Shutthanandan, V., Zhang, Y., Baer, D. R., Thomas, L. E., & Thevuthasan, S. (2003). Microstructure of precipitated Au nanoclusters in TiO 2 In S. Komarneni, J. C. Parker, & J. J. Watkins (Eds.), Materials Research Society Symposium - Proceedings (Vol. 788, pp. 249-253)