基于DNA折纸超分子体系的自组装金属纳米结构及其光学性能研究

Metal Nanostructures Based on DNA Origami Supramolecular Systems and Their Optical Properties

DNA分子是生物体内主要的遗传物质,其通过碱基互补配对作用形成稳定的双螺旋结构.而碱基互补配对的特异性和强相互作用使DNA分子在制造纳米结构和材料方面也发挥着重要作用.在几种基于DNA分子构建纳米结构的方法中,DNA折纸术凭借其高产率、稳定性和构建复杂形状的优异能力,能够对数百纳米尺寸的复杂、任意形状的结构进行可编程的自组装,这是其他纳米制造技术难以达到的.在本文中,我们主要介绍了基于DNA折纸术的自组装金属纳米复合结构及其光学性能的研究进展.首先,介绍了DNA折纸结构设计和构建的基本原理.随后,综述了基于DNA折纸超分子体系构建的金属纳米复合结构在手性效应、表面增强拉曼散射效应和表面增强荧光效应中的最新应用进展.最后,对现有体系中需要解决的问题以及未来的发展方向进行了展望.

DNA molecule is the main genetic material in an organism,which forms a stable double helix structure through base-pairing interactions.Besides,DNA molecule also plays an important role in the fabrication of various nanostructures due to the precise molecular recognition.DNA origami technique possesses great advantages in the fabrication of complex,arbitrary structures with high yield and stability.The excellent ability of DNA origami in building complex shapes with programmability and addressability makes DNA origami a powerful tool to construct various nanostructures that are difficult to achieve with other fabrication techniques.In this review,we mainly introduced the recent progress of metal nanostructures fabricated by DNA origami supramolecular systems and their optical properties.First,we introduced the basic principles of the design and construction of DNA origami.Subsequently,we summarized the recent progress in the fabrication of metal nanostructures based on DNA origami supramolecular self-assemblies and also introduced the optical applications in chirality,surface-enhanced Raman scattering and surface-enhanced fluorescence.Finally,the challenges and the perspectives of this field were also discussed.