张淑芬

个人信息Personal Information

教授

博士生导师

硕士生导师

性别:女

毕业院校:大连理工大学

学位:博士

所在单位:化工学院

学科:应用化学. 精细化工. 有机化学

办公地点:大连市高新区凌工路2号西部校区化工楼E434房间

联系方式:0411-84986265

电子邮箱:zhangshf@dlut.edu.cn

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Porous organic/inorganic hybrid one-dimensional photonic crystals for rapid visual detection of organic solvents

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论文类型:期刊论文

发表时间:2018-03-21

发表刊物:JOURNAL OF MATERIALS CHEMISTRY C

收录刊物:SCIE、EI

卷号:6

期号:11

页面范围:2704-2711

ISSN号:2050-7526

摘要:Stimuli-responsive photonic crystals (PCs) recently have bloomed into a fast-growing research area arousing wide scientific enthusiasm. Here, we propose a kind of highly sensitive and simple liquid organic solvent-responsive one-dimensional photonic crystal (1DPC) sensor derived from porous poly(methyl methacrylate-acrylic acid-ethyleneglycol dimethacrylate)/titania (P(MMA-AA-EGDMA)/TiO2) with structural colors. These organic/inorganic hybrid 1DPCs with textural porosity are fabricated through layer-by-layer assembly based on spin-coating of a microemulsion of polymer nanoparticles and a suspension of TiO2 nanoparticles on silicon substrates. The larger refractive index contrast allows the desired reflectivity to be achieved with a few layers of the 1DPCs. Tunable optical properties of the 1DPC sensors are achieved by modulating the nanoparticle concentration, rotational speed, spin-coating times and stack number. The solvent tunability of the sensors is due to the dependence of the layer refractive index and thickness of the 1DPCs on solvents. Notably, owing to the porosity generated from the nanoparticle-based structure and the high sensitivity of the crosslinked polymer nanoparticles to organic solvents, the obtained 1DPCs present a rapid (within 2 s), obvious and distinguishable color change when immersed in different organic solvents, and the visual detection process shows good reversibility. In addition, the 1DPC sensors also show different responses to various concentrations of organic solvents in water, such as ethanol, methanol and acetone. The porous organic/inorganic hybrid 1DPCs offer high potential for the development of economical and visually detective solvent sensors with high performance.