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

Yu Chuan Liu; Bing Joe Hwang

doi:10.1016/S0040-6090(99)00964-5

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 journal › Article › peer-review

43 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 language	English
Pages (from-to)	1-9
Number of pages	9
Journal	Thin Solid Films
Volume	360
Issue number	1-2
DOIs	https://doi.org/10.1016/S0040-6090(99)00964-5
Publication status	Published - Feb 1 2000
Externally published	Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Metals and Alloys
Materials Chemistry
Surfaces, Coatings and Films
Surfaces and Interfaces

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10.1016/S0040-6090(99)00964-5

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

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.",

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T1 - Enhancement of conductivity stability of polypyrrole films modified by valence copper and polyethylene oxide in an oxygen atmosphere

AU - Liu, Yu Chuan

AU - Hwang, Bing Joe

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N2 - 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.

AB - 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.

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

Abstract

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