HREELS study of alkanethiol passivated gold clusters on graphite

Y. Chen; R.E. Palmer; J.P. Wilcoxon

doi:10.1016/S0039-6028(00)00247-8

HREELS study of alkanethiol passivated gold clusters on graphite

Y. Chen, R.E. Palmer, J.P. Wilcoxon

Physics

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

8 Citations (Scopus)

Abstract

Passivated metal (e.g. gold) nanoclusters consist of a metal particle core surrounded by a ligand coat. We have investigated films of gold particles passivated with alkanethiol (C8H17S) ligands deposited from solution onto a graphite surface using high-resolution electron energy loss spectroscopy (HREELS). Vibrational modes of the CH, groups of the ligands are observed, together with their overtones. Incident energy dependent measurements show an enhancement in intensity of these vibrational modes at a specific energy, similar to 10 eV, consistent with a negative ion resonance state. This observation is compared with previous studies of self-assembled monolayers of thiols on the Au (111) surface.

Original language	English
Pages (from-to)	963-967
Number of pages	5
Journal	Surface Science
Volume	454-456
DOIs	https://doi.org/10.1016/S0039-6028(00)00247-8
Publication status	Published - 20 May 2000

Keywords

clusters
electron energy loss spectroscopy (EELS)
self-assembly
self-assembled monolayers
electron scattering
nanocrystals
molecules
dynamics
impact
films

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10.1016/S0039-6028(00)00247-8

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title = "HREELS study of alkanethiol passivated gold clusters on graphite",

abstract = "Passivated metal (e.g. gold) nanoclusters consist of a metal particle core surrounded by a ligand coat. We have investigated films of gold particles passivated with alkanethiol (C8H17S) ligands deposited from solution onto a graphite surface using high-resolution electron energy loss spectroscopy (HREELS). Vibrational modes of the CH, groups of the ligands are observed, together with their overtones. Incident energy dependent measurements show an enhancement in intensity of these vibrational modes at a specific energy, similar to 10 eV, consistent with a negative ion resonance state. This observation is compared with previous studies of self-assembled monolayers of thiols on the Au (111) surface.",

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author = "Y. Chen and R.E. Palmer and J.P. Wilcoxon",

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doi = "10.1016/S0039-6028(00)00247-8",

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T1 - HREELS study of alkanethiol passivated gold clusters on graphite

AU - Chen, Y.

AU - Palmer, R.E.

AU - Wilcoxon, J.P.

PY - 2000/5/20

Y1 - 2000/5/20

N2 - Passivated metal (e.g. gold) nanoclusters consist of a metal particle core surrounded by a ligand coat. We have investigated films of gold particles passivated with alkanethiol (C8H17S) ligands deposited from solution onto a graphite surface using high-resolution electron energy loss spectroscopy (HREELS). Vibrational modes of the CH, groups of the ligands are observed, together with their overtones. Incident energy dependent measurements show an enhancement in intensity of these vibrational modes at a specific energy, similar to 10 eV, consistent with a negative ion resonance state. This observation is compared with previous studies of self-assembled monolayers of thiols on the Au (111) surface.

AB - Passivated metal (e.g. gold) nanoclusters consist of a metal particle core surrounded by a ligand coat. We have investigated films of gold particles passivated with alkanethiol (C8H17S) ligands deposited from solution onto a graphite surface using high-resolution electron energy loss spectroscopy (HREELS). Vibrational modes of the CH, groups of the ligands are observed, together with their overtones. Incident energy dependent measurements show an enhancement in intensity of these vibrational modes at a specific energy, similar to 10 eV, consistent with a negative ion resonance state. This observation is compared with previous studies of self-assembled monolayers of thiols on the Au (111) surface.

KW - clusters

KW - electron energy loss spectroscopy (EELS)

KW - self-assembly

KW - self-assembled monolayers

KW - electron scattering

KW - nanocrystals

KW - molecules

KW - dynamics

KW - impact

KW - films

U2 - 10.1016/S0039-6028(00)00247-8

DO - 10.1016/S0039-6028(00)00247-8

M3 - Article

SN - 0039-6028

VL - 454-456

SP - 963

EP - 967

JO - Surface Science

JF - Surface Science

ER -

HREELS study of alkanethiol passivated gold clusters on graphite

Abstract

Keywords

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