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Gold nanoparticles for plasmonics

Leader : Sylvie Marguet

Participants: Henri Perez, Aurélie Habert,  Students: Jérôme Caron (Master2)

 

WEBsite of the EDNA group.

Plasmonics is a rapidly growing discipline at the interface of physics, chemistry and biology due to promising applications in key areas such as energy and health. Noble metal nanoparticles like gold and silver have the ability to concentrate high electromagnetic-field intensities at their surface into extremely small volumes. In hybrid metal-chromophore nanostructures, this nanoantenna effect may enhance a range of linear and nonlinear phenomena called plasmon-enhanced photochemistry. The main commercial applications of this effect are photovoltaic cells, IR-photodetectors, new sensors and new sources of light.

We use colloidal chemistry to synthesize gold nanoparticles of controlled shape (sphere, cube, rod, octahedron, star, triangle) and size (10-200 nm) and also wires and microplates (~1µm).

The main advantage of this method is to provide monodisperse solutions of gold nanoparticles with comparable properties. The control of the morphology provides a fine tuning of the plasmon resonance wavelength and of the local field enhancement factor. Compared to top-down materials, these particles of high crystalline quality offer better confinement of the electromagnetic field on their surface.

We uniformly disperse these particles on substrates over large areas (cm2) with a precise control of the surface density (max~600NPs/μm2). We investigate their spontaneous self-organization leading to the formation of 3D arrays. Silica-coated gold nanohybrids (core-shell Au@SiO2@chromophore) are synthetized using a thin silica layer of variable thickness for tuning their antenna properties.

Our research is performed in collaboration with several academic research labs expert in the different fields of plasmonics (see below) and corresponds to the main objectives of two CNRS networks (OR-Nano  and PMSE Molecular Plasmonics and Enhanced-Spectroscopies).

Plasmonics is a flagship of the Laboratory of Excellence Nano-Saclay.

 

 
Colloidal Chemistry Synthesis of Gold Nanoparticles and Spontaneous Self-organiz

Colloidal Chemistry Synthesis of Gold Nanoparticles and Spontaneous Self-organization

Ongoing collaborations:

  1. Renaud Bachelot, Jérôme Plain, LNIO, Troyes, France
  2. Fabrice Charra, Céline Fiorini-Debuisschert, Ludovic Douillard, SPCSI/LEPO, CEA Saclay.
  3. Eric Le Moal , Elizabeth Boer-Duchemin, Geneviève Comtet, Gérald Dujardin, ISMO, Orsay, France
  4. Olivier Soppera, Carole Ecoffet, Jean Pierre Malval, Fernand Wieder, IS2M, Mulhouse, France
  5. Michael Canva, Julien Moreau, IOGS, Palaiseau, France
 

Ongoing Grants:

DIM Nano-K “COSSMET”, 2 years, [sept.2013--sept.2015], with coll. 3 - Leader: E. Le Moal

ANR “HAPPLE” 4 years, [janv.2013--déc.2016], with coll. 1,2,4 -Leader: R. Bachelot

 

Publications:

- “An Electrically Excited Nanoscale Light Source with Active Angular Control of the Emitted Light”
E. Le Moal, S. Marguet, B. Rogez, S. Mukherjee, P. Dos Santos, E. Boer-Duchemin, G. Comtet, G. Dujardin, Nano Letters, 13, 4198, (2013).

Communiqué CNRS (novembre 2013).

- “Spatial Confinement of Electromagnetic Hot and Cold Spots in Gold Nanocubes”
M. Haggui, M. Dridi, J. Plain, S. Marguet, H. Perez, G. C. Schatz, G. P. Wiederrecht, S. K. Gray, R. Bachelot,  ACS Nano, 6, 1299 (2012).

Communiqué CEA (mars 2012).

- “Realization of hybrid systems coupling molecules and gold nanoparticles towards fluorescence enhancement” Y. El Harfouch, K. Liu, F. Charra, S. Marguet, H. Perez, C. Fiorini-Debuisschert, In Proceedings  of SPIE Photonics Europe, Nanophotonics IV, (2012) Vol. 84

- “Mapping the Electromagnetic Near-Field Enhancements of Gold Nanocubes”,
C. Deeb, X. Zhou, R. Miller, S. K.  Gray, S. Marguet, J. Plain, G. P. Wiederrecht, R. Bachelot, Journal of Physical Chemistry C, 116, 24734 (2012).