Comparisons of Self-Assembled Monolayers on Silver and Gold: Mixed Monolayers Derived from HS(CH2)21X and HS(CH2)10Y (X, Y - CH3, CH2OH) Have Similar Properties

Abstract

This paper describes the preparation of self-assembled monolayers (SAMs) by adsorption of alkanethiols on evaporated silver, and compares these SAMs with analogous SAMs prepared on gold. The work concentrated on SAMs derived from mixtures of alkanethiols having long and short chains and terminating in hydrophobic and hydrophilic tails: HS(CH2) 10CH3, HS(CH2) 21CH3, HS(CH2)10CH2OH, and HS(CH2)21CH2OH. The thickness and the compositions of these SAMs were established by X ray photoelectron spectroscopy (XPS). As is observed with self- assembled alkanethiolate monolayers on gold, the composition of the monolayers parallels but does not equal the solution composition. Less pronounced differences are observed between compositions in solution and on the surface on silver than have previously been reported on gold. Rates of exchange of surface thiolates with thiols in solution are similar on silver and gold.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1991
Accession Number
ADA243487

Entities

People

  • George M. Whitesides
  • John P. Folkers
  • Marye A. Fox
  • Paul E. Laibinis

Organizations

  • Harvard University

Tags

Communities of Interest

  • Advanced Electronics
  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Adsorbates
  • Alkanes
  • Attenuation
  • Chemical Synthesis
  • Chemistry
  • Classification
  • Diffraction
  • Energy
  • Films
  • Hydrocarbons
  • Kinetic Energy
  • Measurement
  • Military Research
  • Self Assembled Monolayers
  • Spectra
  • Spectroscopy
  • X Rays

Fields of Study

  • Chemistry

Readers

  • Organic Chemistry
  • Thin Film Deposition Science.

Technology Areas

  • Microelectronics