Volume 92 Issue 16 | p. 31 | Concentrates
Issue Date: April 21, 2014

Tiny Tags To Fight Fakes

Microparticles that can be read with a smartphone could indicate whether goods are genuine
Department: Science & Technology
News Channels: Materials SCENE
Keywords: microparticle tag, counterfeit, stop-flow lithography, rare earth elements

Pharmaceuticals, electronics, and currency all have this in common: Counterfeiters make their ill-gotten gains by faking them. Patrick S. Doyle and coworkers at MIT have come up with a way to thwart counterfeiters by creating microparticle tags that could help verify the authenticity of goods (Nat. Mater. 2014, DOI: 10.1038/nmat3938). Each tag is about 200 μm long and made of colored stripes that . . .

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