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
Dynamic monitoring of thermally assisted assembly of colloidal crystals
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论文类型:期刊论文
发表时间:2017-07-01
发表刊物:JOURNAL OF MATERIALS SCIENCE
收录刊物:SCIE、EI、Scopus
卷号:52
期号:13
页面范围:7883-7892
ISSN号:0022-2461
摘要:The dynamic monitor is considerably valuable to thoroughly understand the self-assembly process and is beneficial for the effective control of ordered colloidal crystal. In this study, the three-dimensional ordered colloidal crystals are fabricated through thermally assisted self-assembly, which are in situ monitored by fiber-optic spectrometer and micro-digital technology. The assembly process occurs layer by layer from top to bottom. The evaporated water-dragged microspheres assemble into the final close-packing face-centered cubic arrangement. During self-assembly, water between microspheres is gradually replaced by air, resulting in the change of effective refractive index, as well as evident color change and blue shifting of wavelength peaks. The effect of self-assembly temperature (60, 70, 80, and 90 A degrees C) and polystyrene microspheres concentration (4, 6, 8, and 10 wt%) are both investigated on the basis of dynamic monitoring of the thermally assisted assembly of colloidal crystal structural color. As confirmed, the emulsion of 10% mass fraction self-assembled at 70 A degrees C can obtain a superior color film structure.