Gold-thiolate cluster emission from SAMs under keV ion bombardment: Experiments and molecular dynamics simulations

B. Arezki; A. Delcorte; A. C. Chami; B. J. Garrison; P. Bertrand

doi:10.1016/S0168-583X(03)01457-5

Gold-thiolate cluster emission from SAMs under keV ion bombardment: Experiments and molecular dynamics simulations

B. Arezki
, A. Delcorte
, A. C. Chami
, B. J. Garrison
, P. Bertrand

Research output: Contribution to journal › Conference article › peer-review

18 Scopus citations

Abstract

In this contribution the emission of gold-molecule cluster ions from self-assembled monolayers (SAMs) of alkanethiols on gold is investigated using time-of-flight secondary ion mass spectrometry (ToF-SIMS). Layers of alkanethiols [CH₃(CH₂)_nSH] with various chain lengths (n=8, 12, 16) have been chosen because they form well-ordered molecular monolayers on gold. First, we compare and interpret the yields and energy spectra of gold-thiolate cluster ions, obtained for different thiol sizes. Our results show that the unimolecular dissociation of larger aggregates in the acceleration section of the spectrometer constitutes a significant formation channel for gold-molecule clusters. Second, we present preliminary results of molecular dynamics simulations performed in order to improve our understanding of the cluster emission processes. These calculations have been conducted using 8 keV projectiles and a long-range term in the hydrocarbon potential in order to account for the van der Waals forces between the thiol chains.

Original language	English (US)
Pages (from-to)	369-375
Number of pages	7
Journal	Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Volume	212
Issue number	1-4
DOIs	https://doi.org/10.1016/S0168-583X(03)01457-5
State	Published - Dec 2003
Event	Atomic Collisions in Solids - India, India Duration: Jan 19 2003 → Jan 24 2003

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics
Instrumentation

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10.1016/S0168-583X(03)01457-5

Cite this

@article{74362780008f4dcf800dbaa29eb65478,

title = "Gold-thiolate cluster emission from SAMs under keV ion bombardment: Experiments and molecular dynamics simulations",

abstract = "In this contribution the emission of gold-molecule cluster ions from self-assembled monolayers (SAMs) of alkanethiols on gold is investigated using time-of-flight secondary ion mass spectrometry (ToF-SIMS). Layers of alkanethiols [CH3(CH2)nSH] with various chain lengths (n=8, 12, 16) have been chosen because they form well-ordered molecular monolayers on gold. First, we compare and interpret the yields and energy spectra of gold-thiolate cluster ions, obtained for different thiol sizes. Our results show that the unimolecular dissociation of larger aggregates in the acceleration section of the spectrometer constitutes a significant formation channel for gold-molecule clusters. Second, we present preliminary results of molecular dynamics simulations performed in order to improve our understanding of the cluster emission processes. These calculations have been conducted using 8 keV projectiles and a long-range term in the hydrocarbon potential in order to account for the van der Waals forces between the thiol chains.",

author = "B. Arezki and A. Delcorte and Chami, \{A. C.\} and Garrison, \{B. J.\} and P. Bertrand",

note = "Funding Information: This work is supported by the PAI-IUAP P4/10 Research program on “Reduced Dimensionality Systems” of the Belgium Federal State. A.D. also acknowledges the Belgian Fonds National pour la Recherche Scientifique for financial support. The ToF-SIMS experiment was acquired with the support of the R {\'e} gion Wallonne and FRFC-Loterie Nationale of Belgium. ; Atomic Collisions in Solids ; Conference date: 19-01-2003 Through 24-01-2003",

year = "2003",

month = dec,

doi = "10.1016/S0168-583X(03)01457-5",

language = "English (US)",

volume = "212",

pages = "369--375",

journal = "Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms",

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Arezki, B, Delcorte, A, Chami, AC, Garrison, BJ & Bertrand, P 2003, 'Gold-thiolate cluster emission from SAMs under keV ion bombardment: Experiments and molecular dynamics simulations', Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms, vol. 212, no. 1-4, pp. 369-375. https://doi.org/10.1016/S0168-583X(03)01457-5

Gold-thiolate cluster emission from SAMs under keV ion bombardment: Experiments and molecular dynamics simulations. / Arezki, B.; Delcorte, A.; Chami, A. C. et al.
In: Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms, Vol. 212, No. 1-4, 12.2003, p. 369-375.

Research output: Contribution to journal › Conference article › peer-review

TY - JOUR

T1 - Gold-thiolate cluster emission from SAMs under keV ion bombardment

T2 - Atomic Collisions in Solids

AU - Arezki, B.

AU - Delcorte, A.

AU - Chami, A. C.

AU - Garrison, B. J.

AU - Bertrand, P.

N1 - Funding Information: This work is supported by the PAI-IUAP P4/10 Research program on “Reduced Dimensionality Systems” of the Belgium Federal State. A.D. also acknowledges the Belgian Fonds National pour la Recherche Scientifique for financial support. The ToF-SIMS experiment was acquired with the support of the R é gion Wallonne and FRFC-Loterie Nationale of Belgium.

PY - 2003/12

Y1 - 2003/12

N2 - In this contribution the emission of gold-molecule cluster ions from self-assembled monolayers (SAMs) of alkanethiols on gold is investigated using time-of-flight secondary ion mass spectrometry (ToF-SIMS). Layers of alkanethiols [CH3(CH2)nSH] with various chain lengths (n=8, 12, 16) have been chosen because they form well-ordered molecular monolayers on gold. First, we compare and interpret the yields and energy spectra of gold-thiolate cluster ions, obtained for different thiol sizes. Our results show that the unimolecular dissociation of larger aggregates in the acceleration section of the spectrometer constitutes a significant formation channel for gold-molecule clusters. Second, we present preliminary results of molecular dynamics simulations performed in order to improve our understanding of the cluster emission processes. These calculations have been conducted using 8 keV projectiles and a long-range term in the hydrocarbon potential in order to account for the van der Waals forces between the thiol chains.

AB - In this contribution the emission of gold-molecule cluster ions from self-assembled monolayers (SAMs) of alkanethiols on gold is investigated using time-of-flight secondary ion mass spectrometry (ToF-SIMS). Layers of alkanethiols [CH3(CH2)nSH] with various chain lengths (n=8, 12, 16) have been chosen because they form well-ordered molecular monolayers on gold. First, we compare and interpret the yields and energy spectra of gold-thiolate cluster ions, obtained for different thiol sizes. Our results show that the unimolecular dissociation of larger aggregates in the acceleration section of the spectrometer constitutes a significant formation channel for gold-molecule clusters. Second, we present preliminary results of molecular dynamics simulations performed in order to improve our understanding of the cluster emission processes. These calculations have been conducted using 8 keV projectiles and a long-range term in the hydrocarbon potential in order to account for the van der Waals forces between the thiol chains.

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U2 - 10.1016/S0168-583X(03)01457-5

DO - 10.1016/S0168-583X(03)01457-5

M3 - Conference article

AN - SCOPUS:0242332343

SN - 0168-583X

VL - 212

SP - 369

EP - 375

JO - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms

JF - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms

IS - 1-4

Y2 - 19 January 2003 through 24 January 2003

ER -

Gold-thiolate cluster emission from SAMs under keV ion bombardment: Experiments and molecular dynamics simulations

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