Characteristics of polypyrrole electrodeposited onto roughened substrates composed of gold-silver bimetallic nanoparticles

Hsun Tsing Lee, Yu Chuan Liu, Li Huei Lin

研究成果: 雜誌貢獻文章同行評審

24 引文 斯高帕斯(Scopus)

摘要

In this work, the characteristics of polypyrrole (PPy) films electrodeposited onto an electrochemically roughened gold substrate with bimetallic silver and gold nanoparticles were first investigated. First, a silver substrate was roughened by a triangular-wave oxidation-reduction cycle (ORC) in an aqueous solution containing 0.1 M HCl. Subsequently, a gold substrate was roughened by a similar ORC treatment in this used solution. The results revealed that the surface of the roughened gold substrate demonstrated two different kinds of deposition domains because of the modification of silver nanoparticles. Encouragingly, some novel characteristics of PPy deposited onto this substrate were observed, in comparison with those on the roughened gold substrate without the modification of silver nanoparticles. They included a denser and more compact surface morphology, higher oxidation degree, increased conductivity, and improved surface-enhanced Raman scattering. Furthermore, the nucleation and growth mechanism for PPy electropolymerization on this silver-modified roughened gold substrate was distinguishable from that on the unmodified one.

原文英語
頁(從 - 到)2724-2731
頁數8
期刊Journal of Polymer Science, Part A: Polymer Chemistry
44
發行號8
DOIs
出版狀態已發佈 - 四月 15 2006
對外發佈

ASJC Scopus subject areas

  • 聚合物和塑料
  • 材料化學

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