Functional gold nanoparticles as photothermal agents for selective-killing of pathogenic bacteria

Wei Chieh Huang, Pei Jane Tsai, Yu-Chie Chen*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

159 Scopus citations

Abstract

Aims: Our aim was to demonstrate that functional gold nanoparticles can be used as photothermal agents for the selective killing of pathogenic bacteria. Materials & methods: Gold nanoparticles with polygonal shapes, capable of absorbing near infrared (NIR) light, were generated through a photochemical reaction. Vancomycin, which can bind with the terminal D-Ala-D-Ala moieties of the peptide units of pathogen cell walls, was immobilized on the surface of the gold nanoparticles. The vancomycin-bound gold nanoparticles were used as the photothermal agents for the inhibition of pathogenic bacteria growth, under irradiation of NIR light (808 nm). Results & discussion: We have demonstrated that vancomycin-bound gold nanoparticles are capable of selective-binding onto the cell walls of pathogenic bacteria. A large portion (>99%) of bacteria targeted by the gold nanop/articles was destroyed under illumination by NIR light within 5 min owing to suffering from heating. Conclusions: This photothermal approach is effective for the inhibition of pathogenic bacteria cell growth, includind Gram-positive bacteria, Gram-negative bacteria and antibiotic-resistant bacteria.

Original languageEnglish
Pages (from-to)777-787
Number of pages11
JournalNanomedicine
Volume2
Issue number6
DOIs
StatePublished - 1 Dec 2007

Keywords

  • Antibiotic-resistant
  • Bacteria
  • Gold nanoparticles
  • Hyperthermia
  • Near infrared
  • Photothermal

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