Jerome Wenger NanoBioPhotonics

I just gave a master's level class on biophotonic applications of plasmons, so I'm pleased to share a few images taken from the web.

NanoBioPlasmonics: outline
1- Surface plasmon concepts
2- Surface Plasmon Resonance sensors SPR
3- Surface enhanced Raman scattering sensors SERS
4- Surface enhanced fluorescence sensors
5- Biomedical application to cancer treatment
6- Plasmonic trapping

The workshop on FCS and related methods was held during October 12th-16th at Cargese (Corsica).

Thanks to all 68 attendees for making it an active workshop.

Pictures and final abstract book are available through the website www.fresnel.fr/FCS

The summer school on plasmonics (SSOP 2009) was held during September 13th-17th on Porquerolles Island.

Thanks to all 123 participants for having made this school a very stimulating scientific event.

The lectures given there are now posted on the SSOP website.

Our latest paper was released on the July 28 issue of ACS Nano.

A nanoscale layer of chromium or titanium is commonly used in plasmonic nanoantennas to firmly adhere a gold film to a glass substrate, yet the influence of this layer on the antenna performance is often ignored. As a result, the need for the use of potentially better materials is not widely recognized.

Using a single nanoaperture milled in a gold film with 120 nm diameter as a nanobench for these investigations, we present the first experimental report of the strong dependence of the plasmonic enhancement of single-molecule fluorescence on the nature of the adhesion layer. By combining fluorescence correlation spectroscopy and fluorescence lifetime measurements, we show that this structure is very sensitive to the properties of the adhesion layer, and we detail the respective contributions of excitation and emission gains to the observed enhanced fluorescence.

Any increase in the absorption losses due to the adhesion layer permittivity or thickness is shown to lower the gains in both excitation and emission, which we relate to a damping of the energy coupling at the nanoaperture.

With this nanobench, we demonstrate the largest enhancement factor reported to date (25×) by using a TiO₂ adhesion layer. The experimental data are supported by numerical simulations and argue for a careful consideration of the adhesion layer while designing nanoantennas for high-efficiency single-molecule analysis.

The editorial staff at ACS Nano choose to write a short niews & views on this paper, "Plasmonic Nanoantennas: Tuning in on the Adhesion Layer", see the link here.

Reprints can be ordered via my group's website Mosaic.

[Edit] So just posting again was enough to remove these nasty ads floating around on my blog.

Sorry for that inconvenience, and also for not posting during a while. I was quite busy with some kind of scientific Euromillion for young researchers