Dual-stimuli responsive photonic barcodes based on perovskite quantum dots encapsulated in whispering-gallery-mode microspheres  

作　　者：Baoyuan Xu Shuo Yang Xingwei Feng Tongjin Zhang Zhenhua Gao Yong Sheng Zhao 

机构地区：[1]School of Materials Science&Engineering,Qilu University of Technology(Shandong Academy of Sciences),3501 Daxue Road,Changqing District,Jinan,250353,Shandong Province,China [2]Key Laboratory of Photochemistry,Institute of Chemistry,Chinese Academy of Sciences,Beijing,100190,China

出　　处：《Journal of Materiomics》2023年第3期423-430,共8页无机材料学学报（英文）

基　　金：supported financially by the Ministry of Science and Technology of China(2017YFA0204502);the National Natural Science Foundation of China(NSFC)(22275104,21905145);the project ZR2021YQ06 supported by Shandong Provincial Natural Science Foundation;Scientific Research Foundation in Qilu University of Technology(Shandong Academy of Sciences)(2022PY013).

摘　　要：Micro/nanoscale photonic barcodes hold great potential for broad applications in items tracking,mul-tiplexed bioassays and anti-counterfeiting.The ever-increasing demand in advanced anti-counterfeiting applications calls for micro/nanoscale barcodes with accurate recognition,large encoding capacity and high security level.Here,we proposed a strategy to construct the dual-stimuli responsive photonic barcodes based on the perovskite quantum dots(PQDs)doped polymer whispering-gallery-mode(WGM)microcavities via swelling-deswelling method.Benefiting from the well-defined spherical microcavities,the photoluminescence(PL)spectra of as-prepared composites exhibit a series of sharp peaks characteristics resulting from the effective WGM modulation,which constitutes the fingerprint of a specific resonator and thus allows a definition of photonic barcodes.On this basis,we achieved responsive photonic barcodes based on the volatile polar-solvent-controlled luminescence in the mi-crospheres benefitting from the space-confined microcavities and the ionic feature of the PQDs.More-over,the light-controlled photonic barcodes have further been acquired through reversibly regulating the inactivation and activation of the energy transfer(ET)process between the PQDs and photochromic dyes.The well-established protocols of PQDs@WGM enable the development of distinct responsive barcodes with multi-responsive features,which will pave an avenue to new types of flexible WGM-based components for optical data recording and security labels.

关 键 词：Responsive photonic barcodes Perovskite quantum dots Whispering-gallery-mode microsphere ANTI-COUNTERFEITING 

分 类 号：TB34[一般工业技术—材料科学与工程]