Chemical Research in Chinese Universities ›› 2020, Vol. 36 ›› Issue (2): 296-300.doi: 10.1007/s40242-020-9078-5

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Reconfigurable Plasmonic Nanostructures Controlled by DNA Origami

LONG Qipeng, YU Hanyang, LI Zhe   

  1. Department of Biomedical Engineering, College of Engineering and Applied Sciences, Nanjing University, Nanjing 210093, P. R. China
  • Received:2019-12-02 Revised:2019-12-25 Online:2020-04-01 Published:2020-01-13
  • Contact: YU Hanyang, LI Zhe E-mail:zheli@nju.edu.cn;hanyangyu@nju.edu.cn
  • Supported by:
    Supported by the National Key Research and Development Program of China(No.2016YFA0502600) and the National Natural Science Foundation of China(Nos.21603100, 21708018).

Abstract: Precise surface functionalization and reconfigurable capability of nanomaterials are essential to construct complex nanostructures with specific functions. Here we show the assembly of a reconfigurable plasmonic nanostructure, which executes both conformational and plasmonic changes in response to DNA strands. In this work, different sized gold nanoparticles(AuNPs) were arranged site-specifically on the surface of a DNA origami clamp nanostructure. The opening and closing of the DNA origami clamp could be precisely controlled by a series of strand displacement reactions. Therefore, the patterns of these AuNPs could be switched between two different configurations. The observed plasmon band shift indicates the change of the plasmonic interactions among the assembled AuNPs. Our study achieves the construction of reconfigurable nanomaterials with tunable plasmonic interactions, and will enrich the toolbox of DNA-based functional nanomachinery.

Key words: DNA origami, Gold nanoparticle, Reconfigurable nanostructure, Plasmonic nanostructure