Research ArticleAPPLIED SCIENCES AND ENGINEERING

Selective control of reconfigurable chiral plasmonic metamolecules

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Science Advances  21 Apr 2017:
Vol. 3, no. 4, e1602803
DOI: 10.1126/sciadv.1602803

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Abstract

Selective configuration control of plasmonic nanostructures using either top-down or bottom-up approaches has remained challenging in the field of active plasmonics. We demonstrate the realization of DNA-assembled reconfigurable plasmonic metamolecules, which can respond to a wide range of pH changes in a programmable manner. This programmability allows for selective reconfiguration of different plasmonic metamolecule species coexisting in solution through simple pH tuning. This approach enables discrimination of chiral plasmonic quasi-enantiomers and arbitrary tuning of chiroptical effects with unprecedented degrees of freedom. Our work outlines a new blueprint for implementation of advanced active plasmonic systems, in which individual structural species can be programmed to perform multiple tasks and functions in response to independent external stimuli.

Keywords
  • DNA nanotechnology
  • Self assembly
  • active plasmonics
  • Circular Dichroism
  • enantioselectivity

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