Au nanoparticles deposited on titania films, where two nanophases of different stoichiometry and defectivity are co-present, were imaged on the same spot by scanning tunneling microscopy. The observed sizes are rather dissimilar as a consequence of the different mobility of Au on the two surfaces. The role of the stoichiometry, which can influence the Au−substrate interaction, and of the defects, which can trap the metal atoms, is discussed on the basis of theoretical calculations of diffusion energy barriers on the two surfaces.

Mobility of Au on TiOx substrates with different stoichiometry and defectivity

SEDONA, FRANCESCO;SAMBI, MAURO;ARTIGLIA, LUCA;RIZZI, GIAN-ANDREA;GRANOZZI, GAETANO
2008

Abstract

Au nanoparticles deposited on titania films, where two nanophases of different stoichiometry and defectivity are co-present, were imaged on the same spot by scanning tunneling microscopy. The observed sizes are rather dissimilar as a consequence of the different mobility of Au on the two surfaces. The role of the stoichiometry, which can influence the Au−substrate interaction, and of the defects, which can trap the metal atoms, is discussed on the basis of theoretical calculations of diffusion energy barriers on the two surfaces.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11577/2458452
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