Spatially and temporally reconfigurable assembly of colloidal crystals
Spatially and temporally reconfigurable assembly of colloidal crystals
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DOI：
10.1038/ncomms4676
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发表时间：
2014-04-01
影响因子：
16.6
通讯作者：
Solomon, Michael J.
中科院分区：
文献类型：
--
作者：
Kim, Youngri;Shah, Aayush A.;Solomon, Michael J.
胶体晶体的自组装对于制备具有功能性光学、机械和导电性能的材料具有重要意义。然而，自组装方法受到其缓慢动力学和缺乏空间和时间结构控制的限制。模板化和定向组装等改进措施部分解决了这个问题，尽管是通过引入模板或电极等固定表面特征。一种无模板的方法来重新配置胶体晶体同时在三维空间和时间将更好地调整工作胶体组装材料的应用。在这里，我们报告了一种光诱导组装方法，该方法产生充满胶体晶体或完全没有胶体的区域。的效果的起源被认为是电泳的胶体产生的光化学在铟锡氧化物涂层基板。简单的光学操作应用于重新配置这些组件和耗尽区。因此，该方法代表了一种新的无模板，可重构的三维光刻。
The self-assembly of colloidal crystals is important to the production of materials with functional optical, mechanical and conductive properties. Yet, self-assembly methods are limited by their slow kinetics and lack of structural control in space and time. Refinements such as templating and directed assembly partially address the problem, albeit by introducing fixed surface features such as templates or electrodes. A template-free method to reconfigure colloidal crystals simultaneously in three-dimensional space and time would better align work in colloidal assembly with materials applications. Here, we report a photo-induced assembly method that yields regions either filled with colloidal crystals or completely devoid of colloids. The origin of the effect is found to be electrophoresis of colloids generated by photochemistry at an indium tin oxide-coated substrate. Simple optical manipulations are applied to reconfigure these assembly and depletion regions. Thus, the method represents a new kind of template-free, reconfigurable three-dimensional photolithography.