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Transparent security due to printed electronics

Researcher Evgeniia Gilshtein and her team (Sami Bolat, Galo Torres Sevilla and David Stalder) developed an invisible security lock: Invisible circuits are printed on a transparent material, e.g. a foil or glass, with help of conductive ink. The printed sensors can be connected to a door lock via an access code.
http://www.empa.ch/web/s604/transparent-security
Thin Films and Photovoltaics Lab: http://www.empa.ch/web/s207
http://www.empa.ch/web/s604/printed-transistors-eq68

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