Temporal dynamic photochromic materials for advanced anticounterfeiting

Tang, Wei; Liang, Ping; Wang, Xiaoxue; Zhang, Chen; Wang, Geng; Liang, Chen; Guan, Mingxiang

doi:10.1039/d3tc02830e

J. Mater. Chem. C

2023

DOI: 10.1039/d3tc02830e

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Temporal dynamic photochromic materials for advanced anticounterfeiting

Wei Tang,

Ping Liang,

Xiaoxue Wang

et al.

Abstract: The intriguing optical phenomena of photochromism and photoluminescence, when integrated into a solitary material, can offer innovative applications in optical memory devices and multimode anti-counterfeiting.

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2024

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Cited by 8 publications

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High‐Capacity Photochromic Rotary Encoder for Information Encryption and Storage

Li,

Liu,

Shao

et al. 2024

Adv Funct Materials

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Photochromic materials are widely used in optical data storage, data encryption, and anti‐counterfeiting because of their ability to be written, erased, and read repeatedly. However, conventional information encryption and storage capabilities based on a “matrix” pattern in a 2D plane are limited to fewer storage dimensions, making information less secure. Here, a new concept of expanding the storage dimensions is presented by manipulating the rotation angle in 2D photochromic encoding disks based on the principle of the absolute encoder. For this purpose, a novel photochromic material, NaNbO3:xEu3+ is developed, with highly efficient red emission, a large luminescence switching contrast, and antithermal quenching behavior. The designed photochromic rotary encoder made with the NaNbO3‐based material exhibits higher‐level data encryption than that of conventional encoders and unlimited storage capability. This study presents exciting opportunities for information storage and encryption using luminescent photochromic materials.

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High‐Capacity Photochromic Rotary Encoder for Information Encryption and Storage

Li,

Liu,

Shao

et al. 2024

Adv Funct Materials

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A 20‐Year Review of Inorganic Photochromic Materials: Design Consideration, Synthesis Methods, Classifications, Optical Properties, Mechanism Models, and Emerging Applications

Li,

Zheng,

et al. 2024

Laser & Photonics Reviews

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Inorganic photochromic materials (i.e., in‐PCMs) are developed as a research hot point in the lighting field due to their excellent optical characteristics, impressive body color modulation, etc. The aim of this work is to make a review on the developments of multi‐metals in‐PCMs (i.e., min‐PCMs) in the past 20 years. The review is structured based on the reversible coloration, crystal hosts, doped ions, PC properties, and mechanism of min‐PCMs and their applications. The synthesis methods of min‐PCMs are reviewed first and then the min‐PCMs are classified according to the types of the doped ions (i.e., single rare‐earth (i.e., RE) ion, multi RE ions, non‐RE ions, and/or the coupled arrangement of these ions). Meanwhile, the min‐PCMs co‐doped with RE and non‐RE ions, together with RE‐ and/or non‐RE‐doped and co‐doped dual crystal matrix, are also disclosed. In the 4th section, we underline the PC mechanisms and show the perspectives on how to produce the PC and obtain the related min‐PCMs. After that, diverse emerging applications of min‐PCMs are summarized, which include optical storage, anti‐counterfeiting, bio‐imaging, light detection, temperature sensing, photocatalysis, and smart windows. In the end, we conclude this review and forecast the promising opportunities and potential challenges of min‐PCMs in the future.

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Development of gum Arabic/chitosan-infiltrated photoluminescent wooden smart window with multifunctional properties

Al-Qahtani,

Al-Senani

2024

Carbohydrate Polymers

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Temporal dynamic photochromic materials for advanced anticounterfeiting

Abstract: The intriguing optical phenomena of photochromism and photoluminescence, when integrated into a solitary material, can offer innovative applications in optical memory devices and multimode anti-counterfeiting.

Cited by 8 publications

References 52 publications

High‐Capacity Photochromic Rotary Encoder for Information Encryption and Storage

High‐Capacity Photochromic Rotary Encoder for Information Encryption and Storage

A 20‐Year Review of Inorganic Photochromic Materials: Design Consideration, Synthesis Methods, Classifications, Optical Properties, Mechanism Models, and Emerging Applications

Development of gum Arabic/chitosan-infiltrated photoluminescent wooden smart window with multifunctional properties

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