‘Roderick Davidson’
World’s smallest spirals could guard against identity theft
Jun. 8, 2015—Take gold spirals about the size of a dime…and shrink them down about six million times. The result is the world’s smallest continuous spirals: “nano-spirals” with unique optical properties that would be almost impossible to counterfeit if they were added to identity cards, currency and other important objects. Students and faculty at Vanderbilt University fabricated...