ARC Centre of Excellence for Transformative Meta Optical Systems (TMOS), Department of Electronic Materials Engineering, Research School of Physics, The Australian National University, Canberra, ACT 2600, Australia.
Research School of Chemistry, College of Science, The Australian National University, Canberra, ACT 2601, Australia.
Chem Rev. 2022 Oct 12;122(19):14990-15030. doi: 10.1021/acs.chemrev.1c00990. Epub 2022 May 10.
Optical metasurfaces are planar metamaterials that can mediate highly precise light-matter interactions. Because of their unique optical properties, both plasmonic and dielectric metasurfaces have found common use in sensing applications, enabling label-free, nondestructive, and miniaturized sensors with ultralow limits of detection. However, because bare metasurfaces inherently lack target specificity, their applications have driven the development of surface modification techniques that provide selectivity. Both chemical functionalization and physical texturing methodologies can modify and enhance metasurface properties by selectively capturing analytes at the surface and altering the transduction of light-matter interactions into optical signals. This review summarizes recent advances in material-specific surface functionalization and texturing as applied to representative optical metasurfaces. We also present an overview of the underlying chemistry driving functionalization and texturing processes, including detailed directions for their broad implementation. Overall, this review provides a concise and centralized guide for the modification of metasurfaces with a focus toward sensing applications.
光学超表面是一种可以介导高度精确的光物质相互作用的平面超材料。由于其独特的光学特性，等离子体和介电超表面都在传感应用中得到了广泛应用，实现了无标记、无损和小型化的传感器，具有超低的检测极限。然而，由于裸超表面本质上缺乏目标特异性，它们的应用推动了表面改性技术的发展，这些技术提供了选择性。化学功能化和物理形貌处理方法都可以通过选择性地在表面捕获分析物并改变光物质相互作用转化为光学信号的方式来修饰和增强超表面的性质。这篇综述总结了最近在材料特异性表面功能化和形貌处理方面的进展，这些进展应用于有代表性的光学超表面。我们还概述了驱动功能化和形貌处理过程的基础化学，包括其广泛实施的详细指导。总的来说，这篇综述提供了一个简洁集中的关于超表面修饰的指南，重点是传感应用。
