Self-assembled multilayers of 4,4′-dimercaptobiphenyl formed by Cu(II)-catalyzed oxidation

Tina Louise Brower, Jayne C. Garno, Abraham Ulman, Gang-yu Liu, Chun Yan, Armin Gölzhäuser, Michael Grunze

Research output: Contribution to journalArticle

37 Citations (Scopus)

Abstract

Self-assembled multilayers were prepared by alternate deposition of 4,4′-dimercaptobiphenyl (DMBP) and copper(II) ions onto planar Au(111) substrates. The multilayers were characterized by ellipsometry, external reflectance Fourier transform infrared spectroscopy (ER-FTIR), X-ray photoelectron spectroscopy (XPS), and atomic force microscopy (AFM). Ellipsometry and ER-FTIR results show a linear relationship between the number of layers and the integral area of absorption characteristic of vibrational modes assigned to the biphenyl moieties. XPS data suggest that the copper is present in the +1 and +2 oxidation states in bulk material made by the reaction of DMBP and Cu(II) ions in solution, and only in the +1 state in multilayer films. XPS results also indicate a linear relationship between the number of DMBP layers and film thickness. AFM studies provided details about the surface morphology. In addition, thickness was measured precisely via nanoshaving and nanografting techniques. On the basis of the combination of these techniques, it is proposed that the DMBP multilayer system is formed by interlayer disulfide linkages.

Original languageEnglish (US)
Pages (from-to)6207-6216
Number of pages10
JournalLangmuir
Volume18
Issue number16
DOIs
StatePublished - Aug 6 2002
Externally publishedYes

Fingerprint

Multilayers
X ray photoelectron spectroscopy
Ellipsometry
photoelectron spectroscopy
Oxidation
oxidation
ellipsometry
Fourier transform infrared spectroscopy
Copper
Atomic force microscopy
infrared spectroscopy
atomic force microscopy
Ions
reflectance
copper
x rays
Multilayer films
disulfides
linkages
Disulfides

ASJC Scopus subject areas

  • Colloid and Surface Chemistry
  • Physical and Theoretical Chemistry

Cite this

Brower, T. L., Garno, J. C., Ulman, A., Liu, G., Yan, C., Gölzhäuser, A., & Grunze, M. (2002). Self-assembled multilayers of 4,4′-dimercaptobiphenyl formed by Cu(II)-catalyzed oxidation. Langmuir, 18(16), 6207-6216. https://doi.org/10.1021/la020084k

Self-assembled multilayers of 4,4′-dimercaptobiphenyl formed by Cu(II)-catalyzed oxidation. / Brower, Tina Louise; Garno, Jayne C.; Ulman, Abraham; Liu, Gang-yu; Yan, Chun; Gölzhäuser, Armin; Grunze, Michael.

In: Langmuir, Vol. 18, No. 16, 06.08.2002, p. 6207-6216.

Research output: Contribution to journalArticle

Brower, TL, Garno, JC, Ulman, A, Liu, G, Yan, C, Gölzhäuser, A & Grunze, M 2002, 'Self-assembled multilayers of 4,4′-dimercaptobiphenyl formed by Cu(II)-catalyzed oxidation', Langmuir, vol. 18, no. 16, pp. 6207-6216. https://doi.org/10.1021/la020084k
Brower, Tina Louise ; Garno, Jayne C. ; Ulman, Abraham ; Liu, Gang-yu ; Yan, Chun ; Gölzhäuser, Armin ; Grunze, Michael. / Self-assembled multilayers of 4,4′-dimercaptobiphenyl formed by Cu(II)-catalyzed oxidation. In: Langmuir. 2002 ; Vol. 18, No. 16. pp. 6207-6216.
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