Real-time molecular-level visualization of mass flow during patterned photopolymerization of liquid-crystalline monomers
Real-time molecular-level visualization of mass flow during patterned photopolymerization of liquid-crystalline monomers
复制标题
液晶单体图案化光聚合过程中质量流的实时分子级可视化
DOI：
10.1038/s41427-021-00292-1
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发表时间：
2021
期刊：
影响因子：
--
通讯作者：
M. Vacha
中科院分区：
文献类型：
--
作者：
K. Ueda;M. Aizawa;A. Shishido;M. Vacha
单粒子荧光成像用于监测液晶单体图案化光聚合过程中发生的动态过程。在光聚合过程中，通过结构化照明可以在亮区和暗区的边界处产生化学势的空间梯度，导致聚合物和单体的相互扩散。对来自以微小浓度掺杂到单体中的单量子点的荧光的分析使得能够可视化从光聚合进行到掩蔽的未聚合区域的照射区域的高度定向的流动。这种定向的质量流导致聚合物的流动诱导取向，随后通过聚合反应的完成而固定，导致聚合物膜的介观排列区域。
Single-particle fluorescence imaging is used to monitor dynamic processes that occur during patterned photopolymerization of liquid-crystalline monomers. A spatial gradient of chemical potential can be created at the border of bright and dark regions by structured illumination in the photopolymerization process, leading to mutual diffusion of polymers and monomers. Analysis of the fluorescence from single quantum dots doped into the monomers at minute concentrations enables visualization of highly directional flow from the illuminated region where the photopolymerization proceeds toward a masked unpolymerized region. This directional mass flow causes flow-induced orientation of the polymers that is subsequently fixed by completion of the polymerization reaction, resulting in a mesoscopic aligned area of the polymer film.