Issue Date: February 1, 2016
Invisible Ink Gets More Secure
Fluorescent inks that are visible only under ultraviolet light are useful for data security and anticounterfeiting but are limited in their usefulness because anybody with a UV lamp can visualize the text. A team based in China has overcome this constraint in several ways. Xinchen Wang and Liangqia Guo at Fuzhou University and colleagues have made a new invisible ink using graphitic carbon nitride quantum dots (Angew. Chem. Int. Ed. 2016, DOI: . . .
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