Encoding Complex Wettability Patterns in Chemically Functionalized 3D Photonic Crystals
Encoding Complex Wettability Patterns in Chemically Functionalized 3D Photonic Crystals
复制标题
DOI：
10.1021/ja2053013
复制
发表时间：
2011-08-17
影响因子：
15
通讯作者：
Aizenberg, Joanna
中科院分区：
文献类型：
--
作者：
Burgess, Ian B.;Mishchenko, Lidiya;Aizenberg, Joanna
从数据加密到环境传感器再到设备制造模板，许多现代技术都依赖于在单一材料平台上编码复杂的化学信息。在这里，我们开发了一种在三维（3D）多孔结构的内表面上绘制多种化学功能的技术。使用高度有序的三维光子晶体作为区域功能化的多孔载体，我们生成了复杂的润湿性模式。将样品浸泡在特定的流体中，会引起其局部浸润，并以由表面化学决定的独特空间模式消失鲜艳的颜色。我们使用这个平台来说明多层消息加密，通过特定的溶剂选择性解码。由于作为载体的反蛋白石光子晶体具有高度对称的几何结构，在很宽的流体表面张力范围内观察到显著的润湿选择性。这些特性与易于检测的光学响应相结合，表明这种系统也可以作为基于润湿性的液体的比色指示器。
Much of modern technology-from data encryption to environmental sensors to templates for device fabrication-relies on encoding complex chemical information in a single material platform. Here we develop a technique for patterning multiple chemical functionalities throughout the inner surfaces of three-dimensional (3D) porous structures. Using a highly ordered 3D photonic crystal as a regionally functionalized porous carrier, we generate complex wettability patterns. Immersion of the sample in a particular fluid induces its localized infiltration and disappearance of the bright color in a unique spatial pattern dictated by the surface chemistry. We use this platform to illustrate multilevel message encryption, with selective decoding by specific solvents. Due to the highly symmetric geometry of inverse opal photonic crystals used as carriers, a remarkable selectivity of wetting is observed over a very broad range of fluids' surface tensions. These properties, combined with the easily detectable optical response, suggest that such a system could also find use as a colorimetric indicator for liquids based on wettability.