Modification and stability of aromatic self-assembled monolayers upon irradiation with energetic particles

P. Cyganik, E. Vandeweert, Z. Postawa, Z. Bastiaansen, F. Vervaecke, P. Lievens, R. E. Silverans, Nicholas Winograd

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

We have studied ion and electron irradiation of self-assembled monolayers (SAMs) of 2-(4′-methyl-biphenyl-4yl)-ethanethiol (BP2, CH 3-C 6H 4C 6H 4CH 2CH 2-SH), phenyl mercaptan (PEM, C 6H 5CH 2CH 2-SH), and 4′-methyl-biphenyl-4- thiol (BP0, CH 3-C 6H 4C 6H 4-SH) deposited on Au(111) substrates. Desorption of neutral particles from PEM/Au and BP2/Au was investigated using laser ionization in combination with mass spectrometry. The ion-induced damage of both BP2 and PEM SAMs is very efficient and interaction with a single ion leads to the modification of tens of molecules. This feature is the result of a desorption process caused by a chemical reaction initiated by an ion impact. Both for ions and electrons, experiments indicate that the possibility for scission of the Au-S bond strongly depends on the chemical nature of the SAM system. We attribute the possible origin of this effect to the orientation of the Au-S-C angle or adsorption sites of molecules. The analysis of electron-irradiated PEM/Au and BP2/Au, using ion-initiated laser probing, enabled measurements of the cross section for the electron-induced damage of the intact molecule or specific fragment. Analysis of electron-irradiated BP0/Au by using time-of-flight secondary ion mass spectrometry (TOF-SIMS) provides direct evidence for the quasi-polymerization process induced by electron irradiation.

Original languageEnglish (US)
Pages (from-to)5085-5094
Number of pages10
JournalJournal of Physical Chemistry B
Volume109
Issue number11
DOIs
StatePublished - Mar 24 2005

Fingerprint

Self assembled monolayers
energetic particles
Irradiation
Ions
irradiation
electron irradiation
thiols
Electron irradiation
Electrons
ions
electrons
Sulfhydryl Compounds
desorption
Molecules
methylidyne
damage
Desorption
molecules
ion impact
neutral particles

All Science Journal Classification (ASJC) codes

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Materials Chemistry

Cite this

Cyganik, P. ; Vandeweert, E. ; Postawa, Z. ; Bastiaansen, Z. ; Vervaecke, F. ; Lievens, P. ; Silverans, R. E. ; Winograd, Nicholas. / Modification and stability of aromatic self-assembled monolayers upon irradiation with energetic particles. In: Journal of Physical Chemistry B. 2005 ; Vol. 109, No. 11. pp. 5085-5094.
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Cyganik, P, Vandeweert, E, Postawa, Z, Bastiaansen, Z, Vervaecke, F, Lievens, P, Silverans, RE & Winograd, N 2005, 'Modification and stability of aromatic self-assembled monolayers upon irradiation with energetic particles', Journal of Physical Chemistry B, vol. 109, no. 11, pp. 5085-5094. https://doi.org/10.1021/jp0478209

Modification and stability of aromatic self-assembled monolayers upon irradiation with energetic particles. / Cyganik, P.; Vandeweert, E.; Postawa, Z.; Bastiaansen, Z.; Vervaecke, F.; Lievens, P.; Silverans, R. E.; Winograd, Nicholas.

In: Journal of Physical Chemistry B, Vol. 109, No. 11, 24.03.2005, p. 5085-5094.

Research output: Contribution to journalArticle

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AU - Cyganik, P.

AU - Vandeweert, E.

AU - Postawa, Z.

AU - Bastiaansen, Z.

AU - Vervaecke, F.

AU - Lievens, P.

AU - Silverans, R. E.

AU - Winograd, Nicholas

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N2 - We have studied ion and electron irradiation of self-assembled monolayers (SAMs) of 2-(4′-methyl-biphenyl-4yl)-ethanethiol (BP2, CH 3-C 6H 4C 6H 4CH 2CH 2-SH), phenyl mercaptan (PEM, C 6H 5CH 2CH 2-SH), and 4′-methyl-biphenyl-4- thiol (BP0, CH 3-C 6H 4C 6H 4-SH) deposited on Au(111) substrates. Desorption of neutral particles from PEM/Au and BP2/Au was investigated using laser ionization in combination with mass spectrometry. The ion-induced damage of both BP2 and PEM SAMs is very efficient and interaction with a single ion leads to the modification of tens of molecules. This feature is the result of a desorption process caused by a chemical reaction initiated by an ion impact. Both for ions and electrons, experiments indicate that the possibility for scission of the Au-S bond strongly depends on the chemical nature of the SAM system. We attribute the possible origin of this effect to the orientation of the Au-S-C angle or adsorption sites of molecules. The analysis of electron-irradiated PEM/Au and BP2/Au, using ion-initiated laser probing, enabled measurements of the cross section for the electron-induced damage of the intact molecule or specific fragment. Analysis of electron-irradiated BP0/Au by using time-of-flight secondary ion mass spectrometry (TOF-SIMS) provides direct evidence for the quasi-polymerization process induced by electron irradiation.

AB - We have studied ion and electron irradiation of self-assembled monolayers (SAMs) of 2-(4′-methyl-biphenyl-4yl)-ethanethiol (BP2, CH 3-C 6H 4C 6H 4CH 2CH 2-SH), phenyl mercaptan (PEM, C 6H 5CH 2CH 2-SH), and 4′-methyl-biphenyl-4- thiol (BP0, CH 3-C 6H 4C 6H 4-SH) deposited on Au(111) substrates. Desorption of neutral particles from PEM/Au and BP2/Au was investigated using laser ionization in combination with mass spectrometry. The ion-induced damage of both BP2 and PEM SAMs is very efficient and interaction with a single ion leads to the modification of tens of molecules. This feature is the result of a desorption process caused by a chemical reaction initiated by an ion impact. Both for ions and electrons, experiments indicate that the possibility for scission of the Au-S bond strongly depends on the chemical nature of the SAM system. We attribute the possible origin of this effect to the orientation of the Au-S-C angle or adsorption sites of molecules. The analysis of electron-irradiated PEM/Au and BP2/Au, using ion-initiated laser probing, enabled measurements of the cross section for the electron-induced damage of the intact molecule or specific fragment. Analysis of electron-irradiated BP0/Au by using time-of-flight secondary ion mass spectrometry (TOF-SIMS) provides direct evidence for the quasi-polymerization process induced by electron irradiation.

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Cyganik P, Vandeweert E, Postawa Z, Bastiaansen Z, Vervaecke F, Lievens P et al. Modification and stability of aromatic self-assembled monolayers upon irradiation with energetic particles. Journal of Physical Chemistry B. 2005 Mar 24;109(11):5085-5094. https://doi.org/10.1021/jp0478209