title: Tunable Electromagnetic Coupling in Plasmonic Nanostructures Mediated by Thermoresponsive Polymer Brushes.
abstract: A smart and highly SERS-active plasmonic platform was designed by coupling regular arrays of nanotriangles to colloidal gold nanorods via a thermoresponsive polymer spacer (poly(N-isopropylacrylamide), PNIPAM). The substrates were prepared by combining a top-down and a bottom-up approach based on nanosphere lithography, surface-initiated controlled radical polymerization, and colloidal assembly. This multistep strategy provided regular hexagonal arrays of nanotriangles functionalized by polymer brushes and colloidal gold nanorods, confined exclusively on the nanotriangle surface. Interestingly, one could finely tune the gold nanorod impregnation on the polymer-coated nanostructures by adjusting the polymer layer thickness, leading to highly coupled plasmonic systems for intense SERS signal. Moreover, the thermoresponsive properties of the PNIPAM brushes could be wisely handled in order to monitor the SERS activity of the nanostructures coupled via this polymer spacer. The coupled hybrid plasmonic nanostructures designed in this work are therefore very promising smart platforms for the sensitive detection of analytes by SERS.
authors.affiliation: Sorbonne Paris Cité, ITODYS, UMR 7086, CNRS, Université Paris Diderot , 15 rue Jean Antoine de Baïf, 75205 Paris, Cedex 13, France.
authors.forename: Mai
authors.initials: M
authors.lastname: Nguyen
authors.affiliation: Laboratoire des Sciences des Procédés et des Matériaux, Université Paris13 , 93430 Villetaneuse, France.
authors.forename: Andrei
authors.initials: A
authors.lastname: Kanaev
authors.affiliation: Sorbonne Paris Cité, ITODYS, UMR 7086, CNRS, Université Paris Diderot , 15 rue Jean Antoine de Baïf, 75205 Paris, Cedex 13, France.
authors.forename: Xiaonan
authors.initials: X
authors.lastname: Sun
authors.affiliation: UPMC Univ Paris 06, CNRS-UMR 7588, Institut des NanoSciences de Paris, Sorbonne Universités , F-75005 Paris, France.
authors.forename: Emmanuelle
authors.initials: E
authors.lastname: Lacaze
authors.affiliation: Sorbonne Paris Cité, ITODYS, UMR 7086, CNRS, Université Paris Diderot , 15 rue Jean Antoine de Baïf, 75205 Paris, Cedex 13, France.
authors.forename: Stéphanie
authors.initials: S
authors.lastname: Lau-Truong
authors.affiliation: Sorbonne Paris Cité, ITODYS, UMR 7086, CNRS, Université Paris Diderot , 15 rue Jean Antoine de Baïf, 75205 Paris, Cedex 13, France.
authors.forename: Aazdine
authors.initials: A
authors.lastname: Lamouri
authors.affiliation: Sorbonne Paris Cité, ITODYS, UMR 7086, CNRS, Université Paris Diderot , 15 rue Jean Antoine de Baïf, 75205 Paris, Cedex 13, France.
authors.forename: Jean
authors.initials: J
authors.lastname: Aubard
authors.affiliation: Sorbonne Paris Cité, ITODYS, UMR 7086, CNRS, Université Paris Diderot , 15 rue Jean Antoine de Baïf, 75205 Paris, Cedex 13, France.
authors.forename: Nordin
authors.initials: N
authors.lastname: Felidj
authors.affiliation: Sorbonne Paris Cité, ITODYS, UMR 7086, CNRS, Université Paris Diderot , 15 rue Jean Antoine de Baïf, 75205 Paris, Cedex 13, France.
authors.forename: Claire
authors.initials: C
authors.lastname: Mangeney
mesh_terms: D000180:Acrylic Resins / Q000737:chemistry*; D055590:Electromagnetic Phenomena; D006046:Gold / Q000737:chemistry*; D008958:Models, Molecular; D008968:Molecular Conformation; D043942:Nanotubes / Q000737:chemistry*; D013059:Spectrum Analysis, Raman; D013499:Surface Properties; D013696:Temperature
chemical_list: D000180:Acrylic Resins; C052970:poly-N-isopropylacrylamide; D006046:Gold