Bioinspired Perovskite Nanocrystals‐Integrated Photonic Crystal Microsphere Arrays for Information Security

Advanced Science

Feika Bian¹  Yuanjin Zhao¹  Yu Wang¹  Luoran Shang²  Lingyu Sun³  Hanxu Chen³  Li Wang³ 

[1] Department of Clinical Laboratory Institute of Translational Medicine The Affiliated Drum Tower Hospital of Nanjing University Medical School Nanjing 210008 China;Shanghai Xuhui Central Hospital Zhongshan‐Xuhui Hospital and the Shanghai Key Laboratory of Medical Epigenetics International Co‐laboratory of Medical Epigenetics and Metabolism (Ministry of Science and Technology Institutes of Biomedical Sciences) Fudan University Shanghai 200433 China;State Key Laboratory of Bioelectronics School of Biological Science and Medical Engineering Southeast University Nanjing 210096 China;

关键词: bioinspired;    hydrochromic;    information security;    perovskite nanocrystal;    photonic crystal;    structural color;   

DOI  :  10.1002/advs.202105278

来源: DOAJ

【 摘 要 】

Abstract Information security occupies an important position in the era of big data. Attempts to improve the security performance tend to impart them with more additional encryption strategies. Herein, inspired by the wettability feature of Stenocara beetle elytra and signal model of traffic light, a novel array of perovskite nanocrystals (PNs)‐integrated PhC microsphere for information security is presented. The photoluminescent PNs are encapsulated in angle‐independent PhC microspheres to impart them with binary optical signals as coding information. Through the multimask superposition approach, PNs‐integrated PhC microspheres with different codes are placed into fluorosilane‐treated PDMS substrate to form different arrays. These arrays could converge moisture on PhC microspheres in wet environment, which avoids the ions loss of the PNs and effectively prevented mutual contamination. In addition, the fluorescence of the PNs inside PhC microspheres could reversibly quench or recover in response to the environmental moisture. Based on these features, it is demonstrated that the PNs‐integrated PhC microsphere arrays could realize various information encryption modes, which indicate their excellent values in information security fields.

【 授权许可】

Unknown