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Structure and electronic properties of gold adsorbed on Ti(0 0 0 1)

✍ Scribed by N. Tsud; F. Šutara; I. Matolínová; K. Veltruská; V. Dudr; V. Cháb; K.C. Prince; V. Matolín

Publisher: Elsevier Science
Year: 2006
Tongue: English
Weight: 172 KB
Volume: 252
Category: Article
ISSN: 0169-4332
DOI: 10.1016/j.apsusc.2006.01.006

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✦ Synopsis

The Au/Ti(0 0 0 1) adsorption system was studied by low energy electron diffraction (LEED) and photoemission spectroscopy with synchrotron radiation after step-wise Au evaporation onto the Ti(0 0 0 1) surface. For adsorption of Au at 300 K, no additional superstructures were observed and the (1 Â 1) pattern of the clean surface simply became diffuse. Annealing of gold layers more than 1 ML thick resulted in the formation of an ordered Au-Ti surface alloy. Depending on the temperature and annealing time, three surface reconstructions were observed by LEED: (H3 Â H3) R308, (2 Â 2) and a one-dimensional incommensurate (H3 Â H3) rectangular pattern. The Au 4f core level and valence band photoemission spectra provided evidence of a strong chemical interaction between gold and titanium. The data indicated formation of an intermetallic interface and associated valence orbital hybridization, together with diffusion of gold into the bulk. Au core-level shifts were found to be dependent on the surface alloy stoichiometry.

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Structure and electronic properties of gold adsorbed on Ti(0&#xa0;0&#xa0;0&#xa0;1)

✦ Synopsis

Structure and electronic properties of gold adsorbed on Ti(0 0 0 1)