کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5366328 | 1388347 | 2006 | 4 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Structure and electronic properties of gold adsorbed on Ti(0 0 0 1) Structure and electronic properties of gold adsorbed on Ti(0 0 0 1)](/preview/png/5366328.png)
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 Ã 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: (â3 Ã â3) R30°, (2 Ã 2) and a one-dimensional incommensurate (â3 Ã â3) 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.
Journal: Applied Surface Science - Volume 252, Issue 15, 30 May 2006, Pages 5428-5431