Issue 10, 2008
From the journal:

Journal of Materials Chemistry

Colorful humidity sensitive photonic crystal hydrogel†

Entao Tian,ab   Jingxia Wang,*c   Yongmei Zheng,d   Yanlin Song,*ac   Lei Jianga  and  Daoben Zhua  

* Corresponding authors

a Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, P. R. China

b Graduate University of the Chinese Academy of Sciences, P. R. China

c Laboratory of New Materials, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, P. R. China
E-mail: wangzhang@iccas.ac.cn, ylsong@iccas.ac.cn

d Laboratory for NanoMedicine and NanoBiotechnology, National Center for NanoScience and Technology, Beijing 100080, P. R. China

Abstract

A colorful humidity sensitive photonic crystal (PC) hydrogel was facilely fabricated by infiltrating acrylamide (AAm) solution into a P(St–MMA–AA) PC template and subsequently photo-polymerizing. The color of the samples was sensitive to humidity; it could reversibly vary from transparent to violet, blue, cyan, green and red under various humidity conditions, covering the whole visible range. This could be attributed to the humidity sensitivity of the sample's stopband, with a maximum change of 240 nm resulting from the varying humidity. Furthermore, the color response showed good stability under cyclic humidity experiments. As-prepared PAAm–P(St–MMA–AA) PC hydrogel successfully combined the humidity sensitivity of PAAm and structure color of the PC template, which suggested a promising composite material as an economical alternative to traditional humidity sensors, and also provided a new insight into the design and development of novel composite functional materials based on a PC template.

Graphical abstract: Colorful humidity sensitive photonic crystal hydrogel

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Article information

DOI
https://doi.org/10.1039/B717368G
Article type
Paper
Submitted
09 Nov 2007
Accepted
02 Jan 2008
First published
25 Jan 2008

J. Mater. Chem., 2008,18, 1116-1122

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Colorful humidity sensitive photonic crystal hydrogel

E. Tian, J. Wang, Y. Zheng, Y. Song, L. Jiang and D. Zhu, J. Mater. Chem., 2008, 18, 1116 DOI: 10.1039/B717368G

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