Spectral dependence of plasmon-enhanced fluorescence in a hollow nanotriangle assembled by DNA origami: towards plasmon assisted energy transfer

Nanoscale. 2018 Sep 13;10(35):16568-16573. doi: 10.1039/c8nr04426k.

Abstract

The precise positioning of plasmonic nanoscale objects and organic molecules can significantly boost our ability to fabricate hybrid nanoarchitectures with specific target functionalities. In this work, we used a DNA origami structure to precisely localize three different fluorescent dyes close to the tips of hollow gold nanotriangles. A spectral dependence of plasmon-enhanced fluorescence is evidenced through co-localized AFM and fluorescence measurements. The experimental results match well with explanatory FDTD simulations. Our findings open the way to the bottom-up fabrication of plasmonic routers operating through plasmon energy transfer. They will allow one to actively control the direction of light propagation.

MeSH terms

  • DNA / chemistry*
  • Energy Transfer*
  • Fluorescence
  • Gold
  • Metal Nanoparticles*
  • Surface Plasmon Resonance*

Substances

  • Gold
  • DNA