Bactericidal effects of plasma-modified surface chemistry of silicon nanograss

Kola Ostrikov, Melanie MacGregor-Ramiasa, Alex Cavallaro, Kostya Ostriko, Krasimir Vasilev

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)

Abstract

The surface chemistry and topography of biomaterials regulate the adhesion and growth of microorganisms in ways that are still poorly understood. Silicon nanograss structures prepared via inductively coupled plasma etching were coated with plasma deposited nanometer-thin polymeric films to produce substrates with controlled topography and defined surface chemistry. The influence of surface properties on Staphylococcus aureus proliferation is demonstrated and explained in terms of nanograss substrate wetting behaviour. With the combination of the nanograss topography; hydrophilic plasma polymer coatings enhanced antimicrobial activity while hydrophobic coatings reduced it. This study advances the understanding of the effects of surface wettability on the bactericidal properties of reactive nano-engineered surfaces.

Original languageEnglish
Article number304001
Number of pages9
JournalJournal of Physics D: Applied Physics
Volume49
Issue number30
DOIs
Publication statusPublished - 5 Jul 2016
Externally publishedYes

Keywords

  • antibacterial surfaces
  • bacteria
  • nanograss
  • nanotopography
  • plasma

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