HREELS studies of gold nanoparticles with dialkyl sulphide ligands

Yu Chen; Richard Palmer; EJ Shelley; Jon Preece

doi:10.1016/S0039-6028(01)01934-3

HREELS studies of gold nanoparticles with dialkyl sulphide ligands

Yu Chen, Richard Palmer, EJ Shelley, Jon Preece

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Abstract

We have employed high resolution electron energy loss spectroscopy (HREELS) to study low energy electron impact on films of gold nanoparticles passivated with dialkyl sulphide (H21C10SC10H21). HREEL spectra obtained in UHV show energy loss peaks due to CHx and CC vibrational modes of the organic ligands together with a mode at 230 cm(-1) assigned to the Au-S stretch. Measurements as a function of impact energy reveal resonances in the intensities centred between 9 and 12 eV. Prolonged exposure of the film to an electron beam at 50 eV, with a dosage of approximately 360 muC cm(-2) causes significant changes in the HREEL spectra. consistent with cleavage of the Au-S bond. (C) 2002 Elsevier Science B.V. All rights reserved.

Original language	English
Pages (from-to)	208-213
Number of pages	6
Journal	Surface Science
Volume	502-503
DOIs	https://doi.org/10.1016/S0039-6028(01)01934-3
Publication status	Published - 10 Apr 2002

Keywords

electron bombardment
clusters
radiation damage
electron energy loss spectroscopy (EELS)
sulphides

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10.1016/S0039-6028(01)01934-3

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title = "HREELS studies of gold nanoparticles with dialkyl sulphide ligands",

abstract = "We have employed high resolution electron energy loss spectroscopy (HREELS) to study low energy electron impact on films of gold nanoparticles passivated with dialkyl sulphide (H21C10SC10H21). HREEL spectra obtained in UHV show energy loss peaks due to CHx and CC vibrational modes of the organic ligands together with a mode at 230 cm(-1) assigned to the Au-S stretch. Measurements as a function of impact energy reveal resonances in the intensities centred between 9 and 12 eV. Prolonged exposure of the film to an electron beam at 50 eV, with a dosage of approximately 360 muC cm(-2) causes significant changes in the HREEL spectra. consistent with cleavage of the Au-S bond. (C) 2002 Elsevier Science B.V. All rights reserved.",

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T1 - HREELS studies of gold nanoparticles with dialkyl sulphide ligands

AU - Chen, Yu

AU - Palmer, Richard

AU - Shelley, EJ

AU - Preece, Jon

PY - 2002/4/10

Y1 - 2002/4/10

N2 - We have employed high resolution electron energy loss spectroscopy (HREELS) to study low energy electron impact on films of gold nanoparticles passivated with dialkyl sulphide (H21C10SC10H21). HREEL spectra obtained in UHV show energy loss peaks due to CHx and CC vibrational modes of the organic ligands together with a mode at 230 cm(-1) assigned to the Au-S stretch. Measurements as a function of impact energy reveal resonances in the intensities centred between 9 and 12 eV. Prolonged exposure of the film to an electron beam at 50 eV, with a dosage of approximately 360 muC cm(-2) causes significant changes in the HREEL spectra. consistent with cleavage of the Au-S bond. (C) 2002 Elsevier Science B.V. All rights reserved.

AB - We have employed high resolution electron energy loss spectroscopy (HREELS) to study low energy electron impact on films of gold nanoparticles passivated with dialkyl sulphide (H21C10SC10H21). HREEL spectra obtained in UHV show energy loss peaks due to CHx and CC vibrational modes of the organic ligands together with a mode at 230 cm(-1) assigned to the Au-S stretch. Measurements as a function of impact energy reveal resonances in the intensities centred between 9 and 12 eV. Prolonged exposure of the film to an electron beam at 50 eV, with a dosage of approximately 360 muC cm(-2) causes significant changes in the HREEL spectra. consistent with cleavage of the Au-S bond. (C) 2002 Elsevier Science B.V. All rights reserved.

KW - electron bombardment

KW - clusters

KW - radiation damage

KW - electron energy loss spectroscopy (EELS)

KW - sulphides

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U2 - 10.1016/S0039-6028(01)01934-3

DO - 10.1016/S0039-6028(01)01934-3

M3 - Article

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EP - 213

JO - Surface Science

JF - Surface Science

ER -

HREELS studies of gold nanoparticles with dialkyl sulphide ligands

Abstract

Keywords

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