Silver Ions’ Dispersion from Alloys Benefits Optical Sensors, Other Applications

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.