The Michigan Engineer News Center

Counterfeit Breathalyzer

A photograph of a researcher blowing on a film of nanopillars to reveal them.

Terry Shyu, MSE PhD Student, demonstrates use of nanopillars that reveal hidden images via condensation of fluid on the structures in the NCRC. Shyu is part of Joseph B and Florence V Cejka Professor of Engineering Nick Kotov's research group that is using this form of nanostructure for the purpose of authenticating documents, currency, and so forth. Photo: Joseph Xu/Michigan Engineering Senior Producer, University of Michigan