Researchers
have discovered that bimetallic nanoparticles containing gold and platinum act
as antimicrobial agents and are effective against a range of bacteria including
E.coli, Salmonella Choleraesius and Pseudomonas Aeruginosa. Pure gold or pure platinum nanoparticles were
not antibiotic at all. Investigations
suggested two mechanisms in operation: disruption of the cell
membranes and increased intracellular ATP.
The nanoparticles were not toxic to mammalian cells in vitro.
Tuning
the Composition of AuPt Bimetallic Nanoparticles for Antibacterial Applications,
Y. Zhao et al, Angewandte Chemie International Edition, DOI:
10.1002/anie.201401035
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