DENG Penga，LI Ganga，MA Huirub，LUO Weia
(a.School of Materials Science and Engineering;b.School of Chemistry, Chemical Engineering and Life Science,Wuhan University of Technology，Wuhan 430070，China)
Abstract:The ionic strength response photonic crystal sensor was rapidly prepared by magnetic assembly and solution polymerization.The structure and properties of the sensors were analyzed by means of field emission scanning electron microscope (SEM),TG-DSC,FT-IR and optical fiber spectrometer.The response properties,response time and cyclic stability of the sensors in different ionic strength solutions were studied.The results show that the preparation time of the sensor is only 10 min,and the microstructure of the sensor is the chain structure with Fe3O4@PVP colloidal particles evenly distributed in the organogel.The gel Weight fraction is as high as 99.05%.In the solution with ion strength ranging from 0～1 000 mmol/L,the diffraction peak moves from 752 nm blue to 491 nm,and the color changes from dark red to blue gradually.The sensor can keep color fast for more than 2 months in the detection environment.When the thickness of the sensor is 60 m,the response time is 320 s.
Keywords:responsive photonic crystals;magnetic assembly;ionic strength;naked eye detection;responsive time
中图分类号：TB34 文献标志码：A
文章编号：1008-5548(2020)05-0028-05
DOI:10.13732/j.issn.1008-5548.2020.05.005
收稿日期： 2019-02-29，修回日期：2019-03-07，在线出版时间：2020-07-08 15:32。
基金项目：国家自然科学基金项目，编号 ：51573144；武汉理工大学研究生优秀学位论文培育项目，编号：2018-YS-007。
第一作者简介：邓鹏(1994—)，男，硕士研究生，研究方向为光子晶体结构变色材料。E-mail：1092370003@qq.com。
通信作者简介：罗巍(1987—)，男，博士，讲师，研究方向为光子晶体结构变色材料。E-mail：rowell@whut.edu.cn。
