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Covalently attached antimicrobial surfaces using BODIPY: improving efficiency and effectiveness

Authors
  • Peveler, WJ
  • Noimark, S
  • Al-Azawi, H
  • Hwang, GB
  • Crick, CR
  • Allan, E
  • Edel, JB
  • Ivanov, AP
  • MacRobert, AJ
  • Parkin, IP
Publication Date
Dec 06, 2017
Identifiers
DOI: 10.1021/acsami.7b13273
OAI: oai:spiral.imperial.ac.uk:10044/1/63991
Source
Spiral - Imperial College Digital Repository
Keywords
License
Unknown

Abstract

The development of photoactivated antimicrobial surfaces that kill pathogens through the production of singlet oxygen has proved very effective in recent years, with applications in medical devices and hospital touch surfaces, to improve patient safety and well being. However, many of these surfaces require a swell-encapsulation-shrink strategy to incorporate the photoactive agents in a polymer matrix, and this is resource intensive, given that only the surface fraction of the agent is active against bacteria. Furthermore, there is a risk that the agent will leach from the polymer and thus raises issues of biocompatibility and patient safety. Here, we describe a more efficient method of fabricating a silicone material with a covalently attached monolayer of photoactivating agent that uses heavy-atom triplet sensitization for improved singlet oxygen generation and corresponding antimicrobial activity. We use boron-dipyrromethane with a reactive end group and incorporated Br atoms, covalently attached to poly(dimethylsiloxane). We demonstrate the efficacy of this material in producing singlet oxygen and killing Staphylococcus aureus and suggest how it might be easily modifiable for future antimicrobial surface development.

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