Self-Assembled Monolayers of Alkanethiols on Gold: Monolayers Derived From Two Components with Alkane Chains of Different Lengths

Abstract

This paper describes the preparation and wetting properties of two-component self-assembled monolayers (SAMs) obtained by the competitive adsorption of one short-chain (HS(CH2)1OSh) and one long-chain (HS(CH2)21LG) alkanethiol onto gold from dilute ethanolic solutions. The four possible combinations of the tail groups CH3 and CH20H were investigated: Sh = CH3/Lg = CH20H, Sh = CH2OH/Lg = CH3, SH = CH2OH/Lg = CH2OH, and Sh = CH3/Lg = CH3. The compositions of these SAMs are not the same as the compositions of the solutions from which they were formed, and the relationship between these compositions suggests that the SAMs have partially phase separated. Contact angles with water and hexadecane, however, show that significant disorder still remains in the interfacial region.

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Document Details

Document Type
Technical Report
Publication Date
Jul 01, 1992
Accession Number
ADA254901

Entities

People

  • G. M. Whitesides
  • J. P. Folkers
  • P. E. Laibinis

Organizations

  • Harvard University

Tags

Communities of Interest

  • Biomedical

DTIC Thesaurus Topics

  • Adsorption
  • Alkanes
  • Chemical Compounds
  • Chemistry
  • Diseases And Disorders
  • Equations
  • Materials
  • Military Research
  • Molecular Dynamics
  • Monomolecular Films
  • Organic Chemistry
  • Organic Materials
  • Phase Separation
  • Self Assembled Monolayers
  • Self Assembly
  • Surface Tension
  • Universities

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  • Electrochemical Surface Science
  • Materials Science and Engineering.
  • Molecular and Cellular Biochemistry