Support effects on the nucleation, growth, and morphology of gold nano-clusters

B. K. Min; W. T. Wallace; D. W. Goodman

doi:10.1016/j.susc.2005.10.024

Support effects on the nucleation, growth, and morphology of gold nano-clusters

B. K. Min, W. T. Wallace, D. W. Goodman

Research output: Contribution to journal › Article › peer-review

68 Citations (Scopus)

Abstract

The nucleation, growth, and morphology of gold (Au) clusters on an irreducible oxide (SiO₂), highly reduced TiO_x (x ∼ 1), and less reduced TiO_x (x ∼ 2) were investigated by scanning tunneling microscopy (STM) with the goal of understanding the relationship between the nucleation, growth, and morphology of Au clusters and the reducibility of the oxide support. Au clusters show preferential nucleation and growth on a TiO_x surface compared to a SiO₂ surface. In addition, higher densities of Au clusters were found on highly reduced TiO _x, suggesting that reduced Ti sites play a role as an active site for the nucleation and growth of Au clusters.

Original language	English
Pages (from-to)	L7-L11
Journal	Surface Science
Volume	600
Issue number	2
DOIs	https://doi.org/10.1016/j.susc.2005.10.024
Publication status	Published - 2006 Jan 15
Externally published	Yes

Keywords

Catalysis
Defects
Metal clusters
Nucleation
Scanning tuneling microscopy

ASJC Scopus subject areas

Condensed Matter Physics
Surfaces and Interfaces
Surfaces, Coatings and Films
Materials Chemistry

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abstract = "The nucleation, growth, and morphology of gold (Au) clusters on an irreducible oxide (SiO2), highly reduced TiOx (x ∼ 1), and less reduced TiOx (x ∼ 2) were investigated by scanning tunneling microscopy (STM) with the goal of understanding the relationship between the nucleation, growth, and morphology of Au clusters and the reducibility of the oxide support. Au clusters show preferential nucleation and growth on a TiOx surface compared to a SiO2 surface. In addition, higher densities of Au clusters were found on highly reduced TiO x, suggesting that reduced Ti sites play a role as an active site for the nucleation and growth of Au clusters.",

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AU - Wallace, W. T.

AU - Goodman, D. W.

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AB - The nucleation, growth, and morphology of gold (Au) clusters on an irreducible oxide (SiO2), highly reduced TiOx (x ∼ 1), and less reduced TiOx (x ∼ 2) were investigated by scanning tunneling microscopy (STM) with the goal of understanding the relationship between the nucleation, growth, and morphology of Au clusters and the reducibility of the oxide support. Au clusters show preferential nucleation and growth on a TiOx surface compared to a SiO2 surface. In addition, higher densities of Au clusters were found on highly reduced TiO x, suggesting that reduced Ti sites play a role as an active site for the nucleation and growth of Au clusters.

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KW - Defects

KW - Metal clusters

KW - Nucleation

KW - Scanning tuneling microscopy

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