Institute of New Materials and Industrial Technologies , Wenzhou University , Wenzhou 325035 , People's Republic of China.
CAS Key Laboratory of Nano-Bio Interface, Suzhou Key Laboratory of Functional Molecular Imaging, Division of Nanobiomedicine and i-Lab , Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences , Suzhou 215123 , People's Republic of China.
ACS Nano. 2019 Dec 24;13(12):13702-13708. doi: 10.1021/acsnano.9b06734. Epub 2019 Sep 26.
Herein, we report self-assembled reconfigurable plasmonic diastereomers based on DNA nanotechnology. Up to three plasmonic chiral centers were organized by dynamic DNA origami platforms. Meanwhile, each chiral center could be individually controlled to switch between left-handed and right-handed states. Thus, complex and reconfigurable chiral plasmonic diastereomers with eight plasmonic stereoisomers were achieved, driven by programmed DNA reactions. With these plasmonic diastereomers, we demonstrated the existence of strong cross-talk near-field coupling among chiral centers, and the coupling of chiral centers could substantially contribute to the overall CD signals. Our work provides an important bottom-up approach for building complex and dynamic chiral plasmonics and for probing the interactions of plasmonic chiral centers.
在这里，我们报告了基于 DNA 纳米技术的自组装可重构手性等离激元。通过动态 DNA 折纸平台组织了多达三个手性等离激元中心。同时，每个手性中心都可以单独控制，在左手和右手状态之间切换。因此，通过编程 DNA 反应，实现了具有八个手性立体异构体的复杂可重构手性等离激元二聚体。通过这些等离激元二聚体，我们证明了手性中心之间存在强烈的近场耦合交叉相互作用，手性中心的耦合可以显著贡献于整体 CD 信号。我们的工作为构建复杂动态手性等离激元和探测等离激元手性中心的相互作用提供了一种重要的自下而上的方法。
