Enhancement of conductivity stability of polypyrrole films modified by valence copper and polyethylene oxide in an oxygen atmosphere

Yu Chuan Liu, Bing Joe Hwang

Research output: Contribution to journalArticle

36 Citations (Scopus)

Abstract

The degradations of polypyrrole (PPy)-based films in conductivity are examined in an oxygen atmosphere for 50 days. The results reveal that polymerization potential, solvents used in polymerization, modification of PPy with valence Cu, and introduction of polyethylene oxide (PEO) into PPy influence the conductivities of PPy films and their corresponding stabilities significantly. Pure PPy, prepared in water at an over-oxidized potential, shows a serious decrease in conductivity. However, valence Cu-modified PPy and PEO-modified PPy, resulting in an electron transfer from Cu to N+ of PPy and a more compact, dense surface and hydrogen bonds forming, respectively, behave more stable. The changes of surface mean roughness before and after aging are quantitatively measured via atomic force microscopy (AFM) analysis. Meanwhile, SERS experiments provide a deeper insight into the aging mechanism of PPy in conductivity.

Original languageEnglish
Pages (from-to)1-9
Number of pages9
JournalThin Solid Films
Volume360
Issue number1-2
DOIs
Publication statusPublished - Feb 1 2000
Externally publishedYes

Fingerprint

Copper oxides
polypyrroles
Polypyrroles
copper oxides
Polyethylene oxides
polyethylenes
Oxygen
valence
atmospheres
conductivity
oxides
augmentation
oxygen
polymerization
Aging of materials
Polymerization
polypyrrole
Atomic force microscopy
Hydrogen bonds
electron transfer

ASJC Scopus subject areas

  • Surfaces, Coatings and Films
  • Condensed Matter Physics
  • Surfaces and Interfaces

Cite this

Enhancement of conductivity stability of polypyrrole films modified by valence copper and polyethylene oxide in an oxygen atmosphere. / Liu, Yu Chuan; Hwang, Bing Joe.

In: Thin Solid Films, Vol. 360, No. 1-2, 01.02.2000, p. 1-9.

Research output: Contribution to journalArticle

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