加密
材料科学
计算机科学
紫外线
紫外线
光化学
光电子学
化学
计算机安全
作者
Di Chen,Chujun Ni,Chen Yang,Ye Li,Xin Wen,Curtis W. Frank,Tao Xie,Hua Ren,Qian Zhao
标识
DOI:10.1002/adma.202209956
摘要
Encryption technologies are essential for information security and product anti-counterfeiting, but they are typically restricted to planar surfaces. Encryption on complex 3D objects offers great potential to further improve security. However, it is rarely achieved owing to the lack of encoding strategies for nonplanar surfaces. Here, an approach is reported to directly encrypt on a 3D-printed object employing orthogonal photochemistry. In this system, visible light photochemistry is used for 3D printing of a hydrogel, and ultraviolet light is subsequently employed to activate its geometrically complex surface through the dissociation of ortho-nitrobenzyl ester units in a spatioselective manner for information coding. This approach offers a new way for more reliable encryption, and the underlying orthogonal photochemistry can be extended toward functional modification of 3D-printed products beyond information protection.
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