Mass Spectrometry and Dynamics of Gold Adatoms Observed on the Surface of Size-Selected Au Nanoclusters.

Zhiwei Wang; Richard Palmer

doi:10.1021/nl2037112

Mass Spectrometry and Dynamics of Gold Adatoms Observed on the Surface of Size-Selected Au Nanoclusters.

Zhiwei Wang, Richard Palmer

Physics and Astronomy

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45 Citations (Scopus)

Abstract

We report the imaging, mass spectrum, and dynamical behavior of adatoms and small clusters observed on the surface facets of size-selected, truncated octahedral gold clusters, Au(N) (N = 923 ± 23), via aberration-corrected scanning transmission electron microscopy. Our quantitative atom counting measurements show that most (∼70%) of the species on the surface are single Au adatoms. Such species are now proposed as key elements of the atomic structure of both monolayer-protected nanoclusters (nanoparticles) and self-assembled monolayers and may also play a role in gold nanocatalysis. The adatoms are found on both {100} and {111} facets with similar probabilities.

Original language	English
Pages (from-to)	91-95
Journal	Nano Letters
Volume	12
Issue number	1
DOIs	https://doi.org/10.1021/nl2037112
Publication status	Published - 8 Dec 2011

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10.1021/nl2037112

Towards an Atomic-scale understanding of the 3D Structures of size-selected Clusters on Surfaces
Li, Z. (Principal Investigator), Johnston, R. (Co-Investigator) & Palmer, R. (Co-Investigator)
Engineering & Physical Science Research Council
1/02/10 → 17/01/14
Project: Research Councils

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abstract = "We report the imaging, mass spectrum, and dynamical behavior of adatoms and small clusters observed on the surface facets of size-selected, truncated octahedral gold clusters, Au(N) (N = 923 ± 23), via aberration-corrected scanning transmission electron microscopy. Our quantitative atom counting measurements show that most (∼70%) of the species on the surface are single Au adatoms. Such species are now proposed as key elements of the atomic structure of both monolayer-protected nanoclusters (nanoparticles) and self-assembled monolayers and may also play a role in gold nanocatalysis. The adatoms are found on both {100} and {111} facets with similar probabilities.",

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AB - We report the imaging, mass spectrum, and dynamical behavior of adatoms and small clusters observed on the surface facets of size-selected, truncated octahedral gold clusters, Au(N) (N = 923 ± 23), via aberration-corrected scanning transmission electron microscopy. Our quantitative atom counting measurements show that most (∼70%) of the species on the surface are single Au adatoms. Such species are now proposed as key elements of the atomic structure of both monolayer-protected nanoclusters (nanoparticles) and self-assembled monolayers and may also play a role in gold nanocatalysis. The adatoms are found on both {100} and {111} facets with similar probabilities.

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Mass Spectrometry and Dynamics of Gold Adatoms Observed on the Surface of Size-Selected Au Nanoclusters.

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Towards an Atomic-scale understanding of the 3D Structures of size-selected Clusters on Surfaces

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