Immobilization of silver nanoparticles on electropolymerized polydopamine films for metal implant applications

Amin GhavamiNejad, Ludwig Erik Aguilar, Rohan B. Ambade, Soo Hyoung Lee, Chan Hee Park, Cheol Sang Kim*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

55 Scopus citations


Polydopamine can be formed and deposited on the surface of titanium substrates either by classical dip coating (d-pdopa) or by electropolymerization (e-pdopa), which has been recently developed. In contrast to the classical approach, dopamine electropolymerization leads to the formation of continuous, smooth films on the surface of the substrate. We further studied the applicability of the polydopamine films by examining their ability to spontaneously reduce silver ions into metal nanoparticles. A simple bacterial inhibition test was conducted with Escherichia coli and Staphylococcus aureus bacteria to examine the differences in the antibacterial efficiency of both e-pdopa and d-pdopa films coated with silver nanoparticles. The e-pdopa samples contained clearer inhibition zones than the d-pdopa samples, which is indicative of the silver nanoparticles being immobilized on e-pdopa film in a more efficient manner for the antimicrobial functionalization of metal implants.

Original languageEnglish (US)
Pages (from-to)5-8
Number of pages4
JournalColloids and Interface Science Communications
StatePublished - May 1 2015


  • Dip-coating
  • Electropolymerization
  • Metal implants
  • Polydopamine
  • Silver nanoparticles
  • Surface roughness

ASJC Scopus subject areas

  • Biotechnology
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Colloid and Surface Chemistry
  • Materials Chemistry


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