Self-healing responsive chiral photonic films for sensing and encoding

被引：60

作者：

Chen, Jiayao ^{[1
]}

Xu, Lirong ^{[1
]}

Lin, Xiaofeng ^{[1
]}

Chen, Ruilian ^{[1
]}

Yu, Di ^{[2
,3
]}

Hong, Wei ^{[1
]}

Zheng, Zhikun ^{[1
]}

Chen, Xudong ^{[1
]}

机构：

[1] Sun Yat Sen Univ, Guangdong Engn Technol Res Ctr High Performance O, Key Lab Polymer Composite & Funct Mat, Minist Educ China,Sch Chem, Guangzhou 510275, Guangdong, Peoples R China

[2] Guangdong Ind Polytech, Sch Automot Engn, Guangzhou 510300, Guangdong, Peoples R China

[3] South China Univ Technol, State Key Lab Pulp & Paper Engn, Guangzhou 510640, Guangdong, Peoples R China

来源：

JOURNAL OF MATERIALS CHEMISTRY C | 2018年 / 6卷 / 29期

基金：

中国国家自然科学基金;

关键词：

TUNABLE OPTICAL-PROPERTIES; MESOPOROUS SILICA FILMS; DYNAMIC BORONIC ESTER; CRYSTAL WAVE-GUIDES; NANOCRYSTALLINE CELLULOSE; ACTUATOR PROPERTIES; NEMATIC STRUCTURES; UP-CONVERSION; HYDROGELS; MICROSPHERES;

D O I：

10.1039/c8tc02666a

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this work, self-healing chiral photonic films (SCPFs) fabricated by the co-assembly of cellulose nanocrystals (CNCs) with a boronic ester crosslinked poly(vinyl alcohol)-polyacrylamide hydrogel is described. The reversible covalent bonds of boronic esters enable the self-healing of SCPFs, the convenient formation of patterns/stacked structures, and the incorporation of SCPFs onto rough and porous surfaces, addressing a universal method for constructing photonic structures on various substrates. The double layer structures of SCPFs with bulk hydrogels enable multidimensional sensing via dynamic reflectance spectroscopy. The unique dynamic reflectance spectral patterns, as well as regular changes in reflectance maxima and delay time, demonstrate a sensitive photonic sensor. As a result of the self-healing properties, the robust anti-counterfeiting layers formed by the SCPFs on paper-printed QR codes realize polarization-dependent recognitions by a smartphone. The approach allows the incorporation of chiral photonic crystals onto various substrates with high optical quality, providing flexibility to design chiral photonic structures for sensing and security applications.

引用

页码：7767 / 7775

页数：9

共 56 条

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