One-dimensional Au on TiO2

• Published in: Journal of physics. Condensed matter Vol. 19; no. 8; pp. 082202 - 082202 (8)
• Main Authors: Locatelli, A, Pabisiak, T, Pavlovska, A, Mentes, T O, Aballe, L, Kiejna, A, Bauer, E
• Format: Journal Article
• Language: English
• Published: Bristol IOP Publishing 28.02.2007; Institute of Physics
• Subjects: Condensed matter: structure, mechanical and thermal properties; Exact sciences and technology; Physics; Structure and morphology; thickness; Surfaces and interfaces; thin films and whiskers (structure and nonelectronic properties); Thin film structure and morphology; Photon stimulated desorption; Titanium oxides; Gold; Vacancies; Density functional method; X-ray spectra; LEED; Atomic structure
• ISSN: 0953-8984; 1361-648X
• DOI: 10.1088/0953-8984/19/8/082202

One-dimensional Au rows are produced on the TiO2(110) surface by controlled photon-stimulated desorption followed by Au deposition at 750 K. In the resulting (1 X 2) structure, O vacancies are replaced by Au atoms, as demonstrated by combined laterally resolved x-ray spectroscopy and micro-LEED (low-energy electron diffraction) measurements. The experimental results are confirmed by first-principles calculations, which indicate strong Au-Ti bonding and a very stable configuration of the Au rows. The calculations determine the detailed atomic structure of the Au rows, with an inter-row spacing of 13 A and an intra-row Au distance of 2.95 A.