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URN: urn:nbn:de:swb:90-583151

Distribution of Pd clusters on ultrathin, epitaxial TiOx films on Pt3Ti(111)

Breinlich, C.; Buchholz, M.; Moors, M.; Pertram, T.; Becker, C.; Wandelt, K.

Abstract:
Scanning tunnelling microscopy (STM) was used to investigate the nucleation and growth of palladium clusters on two different, ultrathin, epitaxial, titania films grown on a Pt$_{3}$Ti(111) surface. The first oxide phase, z'-TiO$_{χ}$, is anisotropic and consists of parallel stripes separated by trenches. Defects (i.e., oxygen vacancies) in this structure are confined to these trenches and act as nucleation sites. Therefore, the Pd clusters are mostly arranged in unidirectional rows along the trenches, creating a template effect. The second phase, w'-TiO$_{χ}$, exhibits a hexagonal, long range, (7 × 7)R21.8°, Moiré-type superstructure with fewer and shallower defects, making the template effect less discernible.


Zugehörige Institution(en) am KIT Institut für Funktionelle Grenzflächen (IFG)
Publikationstyp Zeitschriftenaufsatz
Jahr 2015
Sprache Englisch
Identifikator ISSN: 2190-4286
KITopen ID: 1000058315
Erschienen in Beilstein journal of nanotechnology
Band 6
Heft 1
Seiten 2007-2014
Bemerkung zur Veröffentlichung CC BY 2.0
Schlagworte cluster growth, palladium, platinum–titanium alloy, scanning tunnelling microscopy (STM), template, titanium oxide
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