Nano-Silver Has A Golden Side

thatguy · Oct 4, 2015

http://www.iflscience.com/chemistry/nano-silver-has-golden-side

Particles of a handful of atoms from a single element sometimes reveal properties very different from macroscopic collections of the same element. Solutions of gold nanoparticles vary in color from deep red to bright pink to purple depending on particle size.
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Where silver nanoparticles with other numbers of atoms structure differently from gold, the behavior of [Ag25(SR)18] is so similar in structure to its well-studied gold equivalent that the authors argue it "offers the first model nanoparticle platform to investigate the centuries-old problem of understanding the fundamental differences between silver and gold in terms of nobility, catalytic activity, and optical property." The question is important because silver is so toxic, it is used for antibacterial coatings; whereas gold is so unreactive, it is biologically safe.
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Yay silver

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Nano-Silver Has A Golden Side

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