Variation of the core atomic structure of thiolated (AuxAg1–                x)              312±55 nanoclusters with composition from aberration-corrected HAADF STEM

Nan Jian; Richard E. Palmer

doi:10.1021/jp5119103

Variation of the core atomic structure of thiolated (Au_xAg_{1– x}) _312±55 nanoclusters with composition from aberration-corrected HAADF STEM

Nan Jian, Richard E. Palmer

Physics and Astronomy

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20 Citations (Scopus)

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Abstract

We have investigated the atomic structure of thiol-protected (Au_xAg_{1– x})_312±55 clusters as a function of composition (x) by using aberration-corrected Scanning Transmission Electron Microscopy (STEM), in High Angle Annular Dark Field (HAADF) mode, combined with multislice electron scattering simulations of the STEM images. Three structural motifs are considered: icosahedral, fcc, and ino-decahedral. A combination of STEM intensity and diameter measurement is used to “fractionate” the deposited sample according to composition for atomic resolution imaging. We find that the structure depends critically on composition: the icosahedral structure dominates in Ag-rich clusters, while the fcc structure dominates in Au-rich clusters. The ino-decahedral structure was only observed in clusters with Au content greater than 30%.

Original language	English
Pages (from-to)	11114–11119
Journal	Journal of Physical Chemistry C
Volume	119
Issue number	20
Early online date	13 Mar 2015
DOIs	https://doi.org/10.1021/jp5119103
Publication status	Published - 21 May 2015

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10.1021/jp5119103

Jian_Palmer_Variation_core_atomic_Journal_Physical_Chemistry_C_2015
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http://pubs.acs.org/doi/abs/10.1021/jp5119103

Establish Career Fellowship Professor Richard Palmer - Super-Abundant Size-Selected Cluister Technology for Nanoscale Design of Functional Materials
Palmer, R. (Principal Investigator)
Engineering & Physical Science Research Council
1/01/13 → 28/02/17
Project: Research

Cite this

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title = "Variation of the core atomic structure of thiolated (AuxAg1– x) 312±55 nanoclusters with composition from aberration-corrected HAADF STEM",

abstract = "We have investigated the atomic structure of thiol-protected (AuxAg1– x)312±55 clusters as a function of composition (x) by using aberration-corrected Scanning Transmission Electron Microscopy (STEM), in High Angle Annular Dark Field (HAADF) mode, combined with multislice electron scattering simulations of the STEM images. Three structural motifs are considered: icosahedral, fcc, and ino-decahedral. A combination of STEM intensity and diameter measurement is used to “fractionate” the deposited sample according to composition for atomic resolution imaging. We find that the structure depends critically on composition: the icosahedral structure dominates in Ag-rich clusters, while the fcc structure dominates in Au-rich clusters. The ino-decahedral structure was only observed in clusters with Au content greater than 30%.",

author = "Nan Jian and Palmer, {Richard E.}",

year = "2015",

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AU - Palmer, Richard E.

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Y1 - 2015/5/21

N2 - We have investigated the atomic structure of thiol-protected (AuxAg1– x)312±55 clusters as a function of composition (x) by using aberration-corrected Scanning Transmission Electron Microscopy (STEM), in High Angle Annular Dark Field (HAADF) mode, combined with multislice electron scattering simulations of the STEM images. Three structural motifs are considered: icosahedral, fcc, and ino-decahedral. A combination of STEM intensity and diameter measurement is used to “fractionate” the deposited sample according to composition for atomic resolution imaging. We find that the structure depends critically on composition: the icosahedral structure dominates in Ag-rich clusters, while the fcc structure dominates in Au-rich clusters. The ino-decahedral structure was only observed in clusters with Au content greater than 30%.

AB - We have investigated the atomic structure of thiol-protected (AuxAg1– x)312±55 clusters as a function of composition (x) by using aberration-corrected Scanning Transmission Electron Microscopy (STEM), in High Angle Annular Dark Field (HAADF) mode, combined with multislice electron scattering simulations of the STEM images. Three structural motifs are considered: icosahedral, fcc, and ino-decahedral. A combination of STEM intensity and diameter measurement is used to “fractionate” the deposited sample according to composition for atomic resolution imaging. We find that the structure depends critically on composition: the icosahedral structure dominates in Ag-rich clusters, while the fcc structure dominates in Au-rich clusters. The ino-decahedral structure was only observed in clusters with Au content greater than 30%.

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ER -

Variation of the core atomic structure of thiolated (AuxAg1– x) 312±55 nanoclusters with composition from aberration-corrected HAADF STEM

Abstract

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Establish Career Fellowship Professor Richard Palmer - Super-Abundant Size-Selected Cluister Technology for Nanoscale Design of Functional Materials

Cite this

Variation of the core atomic structure of thiolated (Au_xAg_{1– x}) _312±55 nanoclusters with composition from aberration-corrected HAADF STEM