AVS 56th International Symposium & Exhibition
    Surface Science Monday Sessions
       Session SS2-MoM

Invited Paper SS2-MoM3
Metal Oxide Surfaces: Defects, Dopants, and Reactivity

Monday, November 9, 2009, 9:00 am, Room N

Session: TiO2 Surfaces and Interfaces
Presenter: U. Diebold, Tulane University
Correspondent: Click to Email
Metal oxides are versatile materials and are used in a wide variety of technical fields. In many applications, surface properties play a critical role in device functioning. Our group is investigating the atomic-scale properties of metal oxide surfaces with Scanning Tunneling Microscopy (STM) and area-averaging surface spectroscopies. DFT calculations, conducted in collaboration with theoretical groups, are instrumental in data analysis and interpretation.

In the talk we report recent results on metal oxide materials that have industrial relevance but are rarely studied with surface science techniques. We find that on a TiO2 anatase (101) surface standard preparation procedures lead to subsurface rather than surface oxygen vacancies [1]. Adsorbed water shows an interesting short-range ordering that is governed by substrate-mediated repulsive/attractive interactions [2]. The surface structure of epitaxial films of Sn-doped In2O3 (ITO) is discussed [3].

[1] Y. He et al., Phys. Rev. Lett. 102, 106105 (2009).

[2] Y. He et al., Nature Mater. in press (2009).

[3] E. H. Morales et al., New Journal of Physics, 10 (2008) 125030