Molecular-Level Control Over Surface Order in Self-Assembled Monolayer Films of Organic Thiols on Gold.

Abstract

Long-chain omega-hydroxyalkanethiols (HS(CH2)nOH) coordinate to gold surfaces through the sulphur atom and produce ordered, hydrophilic monolayers in which the hydroxyl groups are exposed at the outer surface. Coadsorption of two omega-hydroxyalkanethiols of different chain lengths, n, results in formation of a monolayer having a disordered surface region that is markedly less hydrophilic than the homogeneous, hydroxylic surface formed from either pure compound. By controlling the composition of the monolayer, it is also possible to control simultaneously the degree of order in the surface and its hydrophilicity. In the monolayers containing a mixture of alkanethiol components, these components apparently do not phase-segregate into macroscopic islands, but are dispersed on a molecular scale. Keywords: Gold, Wettability, Ellipsometry, Self assembly, Films.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1988
Accession Number
ADA192977

Entities

People

  • Colin D. Bain
  • George M. Whitesides

Organizations

  • Harvard University

Tags

Communities of Interest

  • Advanced Electronics
  • Air Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Abstracts
  • Chemistry
  • Engineering
  • Films
  • Hydrophilic Properties
  • Hydrophobic Properties
  • Infrared Spectra
  • Materials
  • Materials Science
  • Military Research
  • Molecular Electronics
  • Monomolecular Films
  • Phase
  • Physical Properties
  • Self Assembled Monolayers
  • Spectra
  • Universities

Fields of Study

  • Chemistry

Readers

  • Electrochemical Surface Science
  • Polymer Science and Technology
  • Thin Film Deposition Science.