Orthogonal Photochemistry toward Direct Encryption of a 3D‐Printed Hydrogel

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Abstract

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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Most cited references 32

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Author and article information

Contributors

Di Chen: (View ORCID Profile)

Tao Xie: (View ORCID Profile)

Hua Ren: (View ORCID Profile)

Qian Zhao: (View ORCID Profile)

Journal

Title: Advanced Materials

Abbreviated Title: Advanced Materials

Publisher: Wiley

ISSN (Print): 0935-9648

ISSN (Electronic): 1521-4095

Publication date Created: April 2023

Publication date (Electronic): February 28 2023

Publication date (Print): April 2023

Volume: 35

Issue: 14

Affiliations

[1 ] Ningbo Research Institute Zhejiang University Ningbo 315100 China

[2 ] State Key Laboratory of Chemical Engineering College of Chemical and Biological Engineering Zhejiang University Hangzhou 310027 China

[3 ] Department of Chemical Engineering Stanford University Stanford CA 94305 USA

Article

DOI: 10.1002/adma.202209956

SO-VID: bcde8c61-339f-45dd-9f2d-dc466ea5c69a

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http://onlinelibrary.wiley.com/termsAndConditions#vor

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