Thermo-induced electromagnetic coupling in gold/polymer hybrid plasmonic structures probed by surface enhanced Raman scattering

H. Gehan; L. Dos Santos; S. Lau; G. Charron; J. Grand; J. Aubard; C. Mangeney; N. Felidj

doi:10.1117/12.893678

20 September 2011 Thermo-induced electromagnetic coupling in gold/polymer hybrid plasmonic structures probed by surface enhanced Raman scattering

H. Gehan, L. Dos Santos, S. Lau, G. Charron, J. Grand, J. Aubard, C. Mangeney, N. Felidj

Author Affiliations +

Proceedings Volume 8096, Plasmonics: Metallic Nanostructures and Their Optical Properties IX; 80961N (2011) https://doi.org/10.1117/12.893678
Event: SPIE NanoScience + Engineering, 2011, San Diego, California, United States

Abstract

This work describes the design of a new plasmonic device made of gold nanoparticles separated from a gold film through a thermoresponsive polymer layer. This organic polymer responds to temperature variations by conformational changes (with a characteristic temperature called the lower critical solution temperature, LCST) and is therefore able to vary the distance between the gold nanoparticles and the gold film. The optical properties of these stimulable substrates were probed by Surface Enhanced Raman Scattering spectroscopy (SERS) using methylene blue (MB) as a molecular probe. We show that an increase of the external temperature reversibly induces a significant enhancement of the MB SERS signal. This was attributed to a stronger interaction between the gold nanoparticles and the gold substrate. The temperature-responsive plasmonic devices developed in this work thus provide a dynamic SERS platform, with thermally switchable electromagnetic coupling between the gold nanoparticles and the gold surface.

Citation Download Citation

H. Gehan, L. Dos Santos, S. Lau, G. Charron, J. Grand, J. Aubard, C. Mangeney, and N. Felidj "Thermo-induced electromagnetic coupling in gold/polymer hybrid plasmonic structures probed by surface enhanced Raman scattering", Proc. SPIE 8096, Plasmonics: Metallic Nanostructures and Their Optical Properties IX, 80961N (20 September 2011); https://doi.org/10.1117/12.893678

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KEYWORDS

Gold

Nanoparticles

Polymers

Molecules

Plasmonics

Raman spectroscopy

Surface enhanced Raman spectroscopy

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