Self-Assembled Monolayer Films of C60 on Cysteamine-Modified Gold

W. Brett Caldwell, Kaimin Chen, Chad A. Mirkin*, Susan J. Babinec

*Corresponding author for this work

Research output: Contribution to journalLetterpeer-review

166 Scopus citations

Abstract

Self-assembled monolayer films (SAMs) of C60 on cysteamine-modified and cysteamine/ethanethiol-modified Au are reported. The monolayers were characterized via contact angle measurements, X-ray photoelectron spectroscopy, electrochemistry, and quartz crystal microbalance (QCM) measurements. C60 surface coverage (2.0 × 10−10 mol/cm2) for a film formed on pure cysteamine was determined by QCM measurements and compares remarkably well with monolayer coverage (1.9 × 10−10 mol/cm2) predicted by a model based on crystallographic data for C60- These experiments demonstrate the utility of the QCM in characterizing and monitoring the growth of fullerene SAMs. Ceo SAMs formed on pure cysteamine yield strikingly different electrochemical responses than those formed on prelayers consisting of varying ratios of ethanethiol and cysteamine and previously reported monolayers of C60 on (aminopropyl)silanized oxide surfaces. Although the C60 SAMs are stable under ambient conditions, the fullerenes may be desorbed from the surface through electrochemical reduction of the films for extended periods of time (>10 min).

Original languageEnglish (US)
Pages (from-to)1945-1947
Number of pages3
JournalLangmuir
Volume9
Issue number8
DOIs
StatePublished - Jan 1 1993

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry

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