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Author Notes:

*E-mail: zhang_wei@iapcm.ac.cn., *E-mail: dingbq@nanoctr.cn., *E-mail: yonggang.ke@emory.edu.

Author Contributions: P. Zhan, P. K. Dutta, and P. Wang contributed equally.

The authors declare no competing financial interest.

Subject:

Research Funding:

This work is supported by a Wallace H. Coulter Department of Biomedical Engineering Faculty Startup Grant and a Winship Cancer Institute Billi and Bernie Marcus Research Award to Y.K.

B.D. acknowledges the support from National Natural Science Foundation of China (21573051, 91127021, 21273052), the National Basic Research Programs of China (2016YFA0201601), the Beijing Natural Science Foundation (L140008), Beijing Municipal Science & Technology Commission (Z161100000116036), and CAS Interdisciplinary Innovation Team.

W.Z. acknowledges the support from National Natural Science Foundation of China (11174042, 11374039) and National Basic Research Program of China (973 Program) (2011CB922204, 2013CB632805).

P.Y. acknowledges support from National Institutes of Health (1R01EB018659).

Keywords:

  • Science & Technology
  • Physical Sciences
  • Technology
  • Chemistry, Multidisciplinary
  • Chemistry, Physical
  • Nanoscience & Nanotechnology
  • Materials Science, Multidisciplinary
  • Chemistry
  • Science & Technology - Other Topics
  • Materials Science
  • DNA origami
  • DNA nanotechnology
  • plasmonic nanostructure
  • gold nanorod
  • dark-field scattering spectroscopy
  • METAMATERIALS
  • NANOSCALE
  • ARCHITECTURES
  • CHIRALITY
  • DISCRETE
  • ARRAYS
  • PAINT

Reconfigurable Three-Dimensional Gold Nanorod Plasmonic Nanostructures Organized on DNA Origami Tripod

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Journal Title:

ACS Nano

Volume:

Volume 11, Number 2

Publisher:

, Pages 1172-1179

Type of Work:

Article | Post-print: After Peer Review

Abstract:

Distinct electromagnetic properties can emerge from the three-dimensional (3D) configuration of a plasmonic nanostructure. Furthermore, the reconfiguration of a dynamic plasmonic nanostructure, driven by physical or chemical stimuli, may generate a tailored plasmonic response. In this work, we constructed a 3D reconfigurable plasmonic nanostructure with controllable, reversible conformational transformation using bottom-up DNA self-assembly. Three gold nanorods (AuNRs) were positioned onto a reconfigurable DNA origami tripod. The internanorod angle and distance were precisely tuned through operating the origami tripod by toehold-mediated strand displacement. The transduction of conformational change manifested into a controlled shift of the plasmonic resonance peak, which was studied by dark-field microscopy, and agrees well with electrodynamic calculations. This new 3D plasmonic nanostructure not only provides a method to study the plasmonic resonance of AuNRs at prescribed 3D conformations but also demonstrates that DNA origami can serve as a general self-assembly platform for constructing various 3D reconfigurable plasmonic nanostructures with customized optical properties.

Copyright information:

© 2017 American Chemical Society.

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