Spontaneous Organization of Carboxylic Acid Monolayer Films in Ultrahigh Vacuum. Kinetic Constraints to Assembly via Gas-Phase Adsorption

Lawrence H. Dubois, Bernard R. Zegarski, Ralph G. Nuzzo

Research output: Contribution to journalArticlepeer-review

Abstract

The organization and bonding of vapor-phase-deposited, monomolecular C1-C4 and C6 n-carboxylic acid films supported on a Cu(100) surface are described. It is shown that, contrary to adsorption from solution, closest-packed monolayers of the n-carboxylic acids are not readily obtained due to the existence of a severe kinetic barrier (presumably largely steric in origin) to their formation. For all the acids studied, at least two discrete bonding states have been identified: (1) a symmetrically bonded, low-converage state and (2) a high-coverage state showing significant tilting of the carboxyl head group with respect to the plane of the surface. The implications of these results as regards molecular self-assembly are discussed.

Original languageEnglish (US)
Pages (from-to)412-417
Number of pages6
JournalLangmuir
Volume2
Issue number4
DOIs
StatePublished - Jan 1 1986
Externally publishedYes

ASJC Scopus subject areas

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

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