Adsorption Study of Cysteine, N-Acetylcysteamine, Cysteinesulfinic Acid and Cysteic Acid on a Polycrystalline Gold Electrode

Abstract

Capacity against potential data for the adsorption of cysteine and other organosulfur compounds on polycrystalline gold are reported. Cysteine, N- acetylcysteamine and cysteinesulfinic acid form monolayers on gold through the thiol group, and significantly lower the interfacial capacity in the double layer region. On the other hand, cysteic acid forms multilayers under the same conditions. The surface excess of the compounds at full monolayer coverage has been estimated, and compared with the data for the adsorption of simple n- alkylthiols. It is argued that the packing of the cysteine and related compounds is more compact due to strong electrostatic interactions.

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Document Details

Document Type
Technical Report
Publication Date
Apr 15, 1993
Accession Number
ADA263127

Entities

People

  • Milan Fedurco
  • William Ronald Fawcett
  • Zofia Borkowska
  • Zuzana Kovacova

Organizations

  • University of California, Davis

Tags

Communities of Interest

  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Acquisition
  • Adsorbates
  • Adsorption
  • Amino Acids
  • Aqueous Solutions
  • Cells
  • Charge Density
  • Chemistry
  • Cysteine
  • Data Acquisition
  • Films
  • Measurement
  • Monomolecular Films
  • Packing Density
  • Resistance
  • Sulfur
  • Sulfur Compounds

Readers

  • Analytical Chemistry
  • Electrochemical Surface Science
  • Thin Film Deposition Science.