Authors
Xuan Zhou, Claire Deeb, Sergei Kostcheev, Gary P. Wiederrecht, Pierre-Michel Adam, Jérémie Béal, Jérôme Plain, David J.Gosztola, Johan Grand, Nordin Félidj, Huan Wang, Alexandre Vial, Renaud Bachelot,
Title
Selective Functionalization of the Nanogap of a Plasmonic Dimer
In
ACS Photonics
Volume
2
Issue
1
Pages
121–129
Year
2015
Publisher's URL
http://pubs.acs.org/doi/abs/10.1021/ph500331c
Indexed by
Abstract
We report a self-developing anisotropic gold/polymer hybrid nanosystem that precisely places dye molecules at the plasmonic hotspot of metal nanostructures for sensing and photonics applications. Unlike conventional molecule–particle configurations, the anisotropic hybrid nanosystem (AHN) introduces an anisotropic spatial distribution of dye-containing active medium. This allows us to precisely overlap the near-field spatial distribution with the active medium and rule out the contribution from the background molecules. This overlap effect selectively highlights the optical response of the molecules of interest, that is, molecules located at the hotspots. Our AHN consists of gold nanodimers whose gaps have been filled with methylene blue molecules. They have been studied by plasmon-enhanced Raman spectroscopy as a probing tool. The AHN opens new doors not only for fundamental studies and photonics applications of molecule–particle interactions, but also for molecular trapping methods at the nanoscale.
Affiliations
Offprint