Volume 94 Issue 5 | p. 28 | Concentrates
Issue Date: February 1, 2016

Invisible Ink Gets More Secure

Materials Science: New graphitic carbon nitride quantum dot ink remains out of sight unless exposed to a chemical decryption reagent
Department: Science & Technology
News Channels: Materials SCENE, Nano SCENE
Keywords: invisible ink, anti-counterfeiting, quantum dots

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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