Modification of alkaneselenolate monolayers by low-energy electrons

T. Weidner, A. Shaporenko, N. Ballav, Abraham Ulman, M. Zharnikov

Research output: Contribution to journalArticle

Abstract

The effect of low-energy (50 eV) electron irradiation on alkaneselenolate (AS) self-assembled monolayers (SAMs) was studied by synchrotron-based X-ray photoelectron spectroscopy and near-edge X-ray absorption fine structure spectroscopy. As a test system, SAMs of dodecaneselenolate (C12Se) were used, and an analogous dodecanethiolate (C12S) SAM was taken as a reference. Both the alkyl matrix and headgroup-substrate interface in AS SAMs were found to be affected by a variety of closely interrelated irradiation-induced processes, which mostly follow a pseudo first-order kinetics and level off at high irradiation doses. The crosssections of the most prominent processes were obtained and found to be in a range of 2-3 × 10 -16 cm 2. The values are very close to the parameters for analogous alkanethiolate (AT) SAMs, which exhibit similar behavior upon exposure to low-energy electron irradiation. At the same time, the saturation values of the fingerprint parameters for some irradiation-induced processes in AS SAMs appeared to be slightly smaller than the values for analogous AT films. This is explained by a stronger headgroup-substrate bond in the case of selenium.

Original languageEnglish (US)
Pages (from-to)1191-1198
Number of pages8
JournalJournal of Physical Chemistry C
Volume112
Issue number4
DOIs
StatePublished - Jan 31 2008

Fingerprint

Self assembled monolayers
Monolayers
electron irradiation
electron energy
irradiation
Electrons
Electron irradiation
Irradiation
selenium
synchrotrons
x rays
fine structure
photoelectron spectroscopy
X ray absorption near edge structure spectroscopy
saturation
dosage
energy
kinetics
Selenium
Substrates

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Electronic, Optical and Magnetic Materials
  • Surfaces, Coatings and Films
  • Energy(all)

Cite this

Modification of alkaneselenolate monolayers by low-energy electrons. / Weidner, T.; Shaporenko, A.; Ballav, N.; Ulman, Abraham; Zharnikov, M.

In: Journal of Physical Chemistry C, Vol. 112, No. 4, 31.01.2008, p. 1191-1198.

Research output: Contribution to journalArticle

Weidner, T, Shaporenko, A, Ballav, N, Ulman, A & Zharnikov, M 2008, 'Modification of alkaneselenolate monolayers by low-energy electrons', Journal of Physical Chemistry C, vol. 112, no. 4, pp. 1191-1198. https://doi.org/10.1021/jp077234q
Weidner, T. ; Shaporenko, A. ; Ballav, N. ; Ulman, Abraham ; Zharnikov, M. / Modification of alkaneselenolate monolayers by low-energy electrons. In: Journal of Physical Chemistry C. 2008 ; Vol. 112, No. 4. pp. 1191-1198.
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