Stability of crystal facets in gold nanorods

Hadas Katz-Boon, Michael Walsh, Christian Dwyer, Paul Mulvaney, Alison M. Funston, Joanne Etheridge

Research output: Contribution to journalArticleResearchpeer-review

Abstract

Metal nanocrystals can be grown in a variety of
shapes through the modification of surface facet energies via
surfactants. However, the surface facets are only a few atoms
wide, making it extremely challenging to measure their
geometries and energies. Here, we locate and count atoms in
Au nanorods at successive time intervals using quantitative
scanning transmission electron microscopy. This enables us to
determine the atomic-level geometry and the relative stability
of the facets and to expound their relationship to the overall
three-dimensional nanocrystal shape and size. We reveal
coexisting high- and low-index facets with comparable stability
and dimensions and find the geometry of the nanorods is
remarkably stable, despite significant atom movements. This information provides unique insights into the mechanisms that
govern growth kinetics and nanocrystal morphology.
Original languageEnglish
Pages (from-to)1635 - 1641
Number of pages7
JournalNano Letters
Volume15
Issue number3
DOIs
Publication statusPublished - 2015

Cite this

Katz-Boon, Hadas ; Walsh, Michael ; Dwyer, Christian ; Mulvaney, Paul ; Funston, Alison M. ; Etheridge, Joanne. / Stability of crystal facets in gold nanorods. In: Nano Letters. 2015 ; Vol. 15, No. 3. pp. 1635 - 1641.
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abstract = "Metal nanocrystals can be grown in a variety ofshapes through the modification of surface facet energies viasurfactants. However, the surface facets are only a few atomswide, making it extremely challenging to measure theirgeometries and energies. Here, we locate and count atoms inAu nanorods at successive time intervals using quantitativescanning transmission electron microscopy. This enables us todetermine the atomic-level geometry and the relative stabilityof the facets and to expound their relationship to the overallthree-dimensional nanocrystal shape and size. We revealcoexisting high- and low-index facets with comparable stabilityand dimensions and find the geometry of the nanorods isremarkably stable, despite significant atom movements. This information provides unique insights into the mechanisms thatgovern growth kinetics and nanocrystal morphology.",
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Katz-Boon, H, Walsh, M, Dwyer, C, Mulvaney, P, Funston, AM & Etheridge, J 2015, 'Stability of crystal facets in gold nanorods', Nano Letters, vol. 15, no. 3, pp. 1635 - 1641. https://doi.org/10.1021/acs.nanolett.5b00124

Stability of crystal facets in gold nanorods. / Katz-Boon, Hadas; Walsh, Michael ; Dwyer, Christian; Mulvaney, Paul ; Funston, Alison M.; Etheridge, Joanne.

In: Nano Letters, Vol. 15, No. 3, 2015, p. 1635 - 1641.

Research output: Contribution to journalArticleResearchpeer-review

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T1 - Stability of crystal facets in gold nanorods

AU - Katz-Boon, Hadas

AU - Walsh, Michael

AU - Dwyer, Christian

AU - Mulvaney, Paul

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AU - Etheridge, Joanne

PY - 2015

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AB - Metal nanocrystals can be grown in a variety ofshapes through the modification of surface facet energies viasurfactants. However, the surface facets are only a few atomswide, making it extremely challenging to measure theirgeometries and energies. Here, we locate and count atoms inAu nanorods at successive time intervals using quantitativescanning transmission electron microscopy. This enables us todetermine the atomic-level geometry and the relative stabilityof the facets and to expound their relationship to the overallthree-dimensional nanocrystal shape and size. We revealcoexisting high- and low-index facets with comparable stabilityand dimensions and find the geometry of the nanorods isremarkably stable, despite significant atom movements. This information provides unique insights into the mechanisms thatgovern growth kinetics and nanocrystal morphology.

UR - http://pubs.acs.org/doi/pdf/10.1021/acs.nanolett.5b00124

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JF - Nano Letters

SN - 1530-6984

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