EQCM Studies of Film Growth, Redox Cycling, and Charge Trapping of n-Doped and p-Doped Poly(Thiophene).

Abstract

The electrochemical quartz crystal microbalance (EQCM) is used to monitor mass changes which accompany the growth, redox cycling, and charge trapping of thin films of poly(thiophene) (PT) at Au electrodes under potentiodynamic conditions. Mechanical conductance spectra of the EQCM/PT composite resonators reveal that the PT films behave as rigid layers, allowing use of the Sauerbrey equation for calculation of quantitative mass changes from the frequency changes recorded with the EQCM. Film growth by oxidation of 2,2'- bithiophene appears to proceed by production of soluble, short chain oligomers following oxidation, with precipitation a consequence of both reduction and increasing chain length.

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Document Details

Document Type
Technical Report
Publication Date
Apr 29, 1991
Accession Number
ADA235603

Entities

People

  • Daniel A. Buttry
  • Ricardo Borjas

Organizations

  • University of Wyoming

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Abstracts
  • Chemistry
  • Composite Materials
  • Electrodes
  • Equations
  • Films
  • Frequency
  • Materials
  • Measurement
  • Microbalances
  • Military Research
  • Monitoring
  • Polymeric Films
  • Quartz Crystal Microbalances
  • Spectra
  • Thin Films
  • Universities

Fields of Study

  • Materials science

Readers

  • Electrochemical Surface Science
  • Semiconductor Device Technology
  • Theoretical Analysis.