Poly(amino acid)-facilitated electrochemical growth of metal nanoparticles

Karthik Venkatachalam, Vasilis G. Gavalas, Shifen Xu, Ame C. De Leon, Dibakar Bhattacharyya, Leonidas G. Bachas

Research output: Contribution to journalArticle

6 Scopus citations

Abstract

Poly(amino acids) are natural chelating agents for various metal ions. Zinc ions were encapsulated in situ in a conductive polypyrrole film using polyglutamic acid as a localized complexing agent within the film. The subsequent electrochemical reduction of the metal ions to zero-valent metal leads to the formation of the nanoparticles. The electrochemical approach demonstrated in this report provides facile regeneration of the particles and also prevents aggregation of nanoparticles in the conductive polymeric film. The correlation of the amount of zinc with the thickness of the film indicates that the zinc resides largely in the outer layer of the film. TEM and EDS data show that the nanoparticles formed are composed of zinc and are 18 ± 7 nm in diameter. The nanoparticle/polymer composite was used to reduce halogenated organics, indicating its potential usefulness in remediation applications.

Original languageEnglish (US)
Pages (from-to)2408-2412
Number of pages5
JournalJournal of Nanoscience and Nanotechnology
Volume6
Issue number8
DOIs
StatePublished - Aug 1 2006
Externally publishedYes

Keywords

  • Dechlorination
  • Doped Polypyrrole Films
  • Electrochemical Growth
  • Halogenated Organics
  • Poly(amino acid)
  • Zinc Nanoparticles

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Biomedical Engineering
  • Materials Science(all)
  • Condensed Matter Physics

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