Spatial and Directional Control over Self-Assembly Using Catalytic Micropatterned Surfaces
Spatial and Directional Control over Self-Assembly Using Catalytic Micropatterned Surfaces
复制标题
DOI：
10.1002/anie.201310776
复制
发表时间：
2014-04-14
影响因子：
16.6
通讯作者：
van Esch, Jan H.
中科院分区：
文献类型：
--
作者：
Olive, Alexandre G. L.;Abdullah, Nor Hakimin;van Esch, Jan H.
催化剂辅助的自组装在自然界中广泛存在，以实现对结构形成的空间控制。本文报道的是在催化表面上形成水凝胶微图案。胶凝剂前体在催化位点上反应以形成可以自组装成纳米纤维的结构单元。所得到的结构优先在催化剂存在的地方生长。不仅实现了第一级组织，允许构建水凝胶微图案，而且在纤维之间观察到第二级组织。实际上，纤维以其主轴垂直于基底生长。这一特点与合成系统的独特纤维形成机制直接相关。在固-液界面处的有限空间中将构建块添加到纤维中。
Catalyst-assisted self-assembly is widespread in nature to achieve spatial control over structure formation. Reported herein is the formation of hydrogel micropatterns on catalytic surfaces. Gelator precursors react on catalytic sites to form building blocks which can self-assemble into nanofibers. The resulting structures preferentially grow where the catalyst is present. Not only is a first level of organization, allowing the construction of hydrogel micropatterns, achieved but a second level of organization is observed among fibers. Indeed, fibers grow with their main axis perpendicular to the substrate. This feature is directly linked to a unique mechanism of fiber formation for a synthetic system. Building blocks are added to fibers in a confined space at the solid-liquid interface.