Modification of electrochemically roughened Au(111) by underpotentially deposited silver and its effect on the subsequent electrodeposition of polypyrrole

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Abstract

In this study, electrochemically roughened Au(111) is modified with underpotential deposition (UPD) silver for the first time. The formation of self-assembled monolayers of pyrrole monomers and subsequently further autopolymerization are found on the UPD-Ag-modified gold surfaces. The presence of UPD Ag improves the stability of polypyrrole (PPy) monolayers against desorption in a sonicating bath at elevated temperature. Furthermore, the nucleation and growth mechanism for PPy electropolymerized on UPD-Ag-modified Au is distinguishable from that on unmodified Au. The corresponding conductivity and the Raman intensity of PPy electropolymerized on UPD-Ag-modified Au increase by about 2-fold and 4-fold, respectively.

Original languageEnglish
Pages (from-to)6888-6893
Number of pages6
JournalLangmuir
Volume19
Issue number17
DOIs
Publication statusPublished - Aug 19 2003
Externally publishedYes

Fingerprint

polypyrroles
Polypyrroles
Silver
Electrodeposition
electrodeposition
silver
Pyrroles
Self assembled monolayers
pyrroles
Gold
baths
Monolayers
Desorption
Nucleation
monomers
Monomers
desorption
polypyrrole
nucleation
gold

ASJC Scopus subject areas

  • Colloid and Surface Chemistry
  • Physical and Theoretical Chemistry

Cite this

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title = "Modification of electrochemically roughened Au(111) by underpotentially deposited silver and its effect on the subsequent electrodeposition of polypyrrole",
abstract = "In this study, electrochemically roughened Au(111) is modified with underpotential deposition (UPD) silver for the first time. The formation of self-assembled monolayers of pyrrole monomers and subsequently further autopolymerization are found on the UPD-Ag-modified gold surfaces. The presence of UPD Ag improves the stability of polypyrrole (PPy) monolayers against desorption in a sonicating bath at elevated temperature. Furthermore, the nucleation and growth mechanism for PPy electropolymerized on UPD-Ag-modified Au is distinguishable from that on unmodified Au. The corresponding conductivity and the Raman intensity of PPy electropolymerized on UPD-Ag-modified Au increase by about 2-fold and 4-fold, respectively.",
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year = "2003",
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N2 - In this study, electrochemically roughened Au(111) is modified with underpotential deposition (UPD) silver for the first time. The formation of self-assembled monolayers of pyrrole monomers and subsequently further autopolymerization are found on the UPD-Ag-modified gold surfaces. The presence of UPD Ag improves the stability of polypyrrole (PPy) monolayers against desorption in a sonicating bath at elevated temperature. Furthermore, the nucleation and growth mechanism for PPy electropolymerized on UPD-Ag-modified Au is distinguishable from that on unmodified Au. The corresponding conductivity and the Raman intensity of PPy electropolymerized on UPD-Ag-modified Au increase by about 2-fold and 4-fold, respectively.

AB - In this study, electrochemically roughened Au(111) is modified with underpotential deposition (UPD) silver for the first time. The formation of self-assembled monolayers of pyrrole monomers and subsequently further autopolymerization are found on the UPD-Ag-modified gold surfaces. The presence of UPD Ag improves the stability of polypyrrole (PPy) monolayers against desorption in a sonicating bath at elevated temperature. Furthermore, the nucleation and growth mechanism for PPy electropolymerized on UPD-Ag-modified Au is distinguishable from that on unmodified Au. The corresponding conductivity and the Raman intensity of PPy electropolymerized on UPD-Ag-modified Au increase by about 2-fold and 4-fold, respectively.

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