Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA.
Anal Chem. 2012 Aug 7;84(15):6416-20. doi: 10.1021/ac300174m. Epub 2012 Jul 11.
We developed a novel two-dimensional (2-D) crystalline colloidal array photonic crystal sensing material for the visual detection of amphiphilic molecules in water. A close-packed polystyrene 2-D array monolayer was embedded in a poly(N-isopropylacrylamide) (PNIPAAm)-based hydrogel film. These 2-D photonic crystals placed on a mirror show intense diffraction that enables them to be used for visual determination of analytes. Binding of surfactant molecules attaches ions to the sensor that swells the PNIPAAm-based hydrogel. The resulting increase in particle spacing red shifts the 2-D diffracted light. Incorporation of more hydrophobic monomers increases the sensitivity to surfactants.
我们开发了一种新型二维（2-D）胶体晶体光子晶体传感材料，用于在水中可视化检测两亲分子。将紧密堆积的聚苯乙烯 2-D 阵列单层嵌入到基于聚（N-异丙基丙烯酰胺）（PNIPAAm）的水凝胶薄膜中。这些放置在镜子上的 2-D 光子晶体显示出强烈的衍射，使其可用于分析物的目视测定。表面活性剂分子的结合将离子附着到传感器上，从而使基于 PNIPAAm 的水凝胶溶胀。颗粒间距的这种增大导致二维衍射光的红移。更多疏水性单体的掺入增加了对表面活性剂的敏感性。
