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A study led by Rice University and the University of Duisburg-Essen in Germany used hyperspectral dark-field imaging microscopy to reveal the multistep mechanism that causes silver ions to dissipate from gold-silver alloy nanoparticles. Gold-silver alloys are catalysts that can be used to degrade environmental pollutants and, in antibacterial coatings, to kill bacteria on surfaces. In nanoparticle form, the alloys could be useful as optical sensors.
A problem is the tendency of the silver to release from the alloy nanoparticles. The international collaboration supports industry’s ability to fine-tune the nanoparticles for specific uses.
Researchers used gold-silver alloy nanoparticles with an excess of silver in an acidic…READ MORE