| | | | | | | webmail : intra-extra| Accès VPN| Accès IST| Contact | Français

Projets 2013

29-10-2013
Optical Control of the Motion and Organization of Nanoparticles

Funding: ANR Blanc - Sciences de l'information, de la matière et de l'ingénierie : Nanosciences


December 2010 - December 2014 (closed)

 

Partners:

 

PhD student at CEA:

29-10-2013
Hybrid Anisotropic Plasmon-Photonics for Light Emission

Funding: ANR Blanc - Sciences de l'information, de la matière et de l'ingénierie : Nanosciences


January 2013 - December 2016

 

Partners:

  • LNIO Institut Charles Delaunay, Université de Technologie de Troyes (Renaud Bachelot, coordinator)
  • Laboratoire de nanophotonique, CEA / Saclay (Fabrice Charra)
  • Laboratoire Francis Perrin, CEA / CNRS Saclay (Sylvie Marguet)
  • Institut de science des matériaux de mulhouse, CNRS (Olivier Soppera)

 

PhD student at CEA:

29-10-2013
A multifunctional platform for long range ordered nanocrystal networks fabrication

Funding: ANR Blanc - Sciences de l'information, de la matière et de l'ingénierie : Nanosciences


March 2012 - July 2015

 

Partners :

 

 

29-10-2013
Supramolecular Architectures on Metal for Plasmonic Luminescence Enhancement

Funding:

ANR Blanc - Sciences de l'information, de la matière et de l'ingénierie : Nanosciences

Triangle de la Physique - PhD co-funding 2014


January 2014 - June 2017

 

Partners :

PhD Student, CEA and Triangle de la Physique :

  • Sylvain Le Liepvre, Molecular self-assembly for plasmon stimulated emission, Ecole Doctorale Ondes et Matière, EDOM
29-10-2013
Nano-object optical manipulation

NanoSaclay LabEx - Fragship Nanophotonics : nano-objects for energy control 


2012 - 2014

 

Partners :

  • Laboratoire de nanophotonique, CEA / saclay (Fabrice Charra, coordinator)
  • Equipe Nanosciences Moléculairss, ISMO U. Paris-Sud (Gérald Dujardin, board member)
  • Laboratoire Photonique et Nanostructures, CNRS Marcoussis (Robert Kuszelewicz, board member)
  • Laboratoire de photophysique et photochimie supramoléculaires et macromoléculaires, ENS Cachan (Keitaro Nakatani, board member, Anne Débarre)
  • Laboratoire PMC, Cnrs - Ecole Polytechnique (Jacques Peretti)
  • Laboratoire de Chimie Inorganique, ICMMO U. Paris Sud (Anne Bleuzen)
  • groupe Nanophotonique et Electromagnétisme, Laboratoire Charles Fabry, IOGS (Jean-Jacques Greffet)
  • Groupe Edifices Nanométriques, CEA / Saclay (Cécile Reynaud)
  • Laboratoire de Chimie des Surfaces et Interfaces, CEA / Saclay (Serge Palacin)
29-10-2013
Core-shell fluorescent and plasmonic nanoparticles using microemulsion assisted photoreduction technique

Project funded through the CEA (France) - IFA (Romania) agreement


October 2012 - September 2014

 

Partners :

  • Laboratoire de nanophotonique, CEA / saclay (Fabrice Charra)
  • Center for Surface Science and NanoTechnology, Univ. Politehnica Bucarest (Maria Mihaly)
29-10-2013
Active probes for High Resolution Near Field Microscopy

Funding: ANR P2N - Programme Nanotechnologies et Nanosystèmes


December 2013 - May 2017

 

Partners :

 

PhD student at CEA :

 

Access to shared documents (project partners only)

29-10-2013
Laboratoire de Nanophotonique
 
 
Active ANR projects:
 
SMAL'LEDSingle Molecule Architectures as Lowest-scale Light Emitting Devices
 

Completed ANR projects:

NANOCRISNET : A multifunctional platform for long range ordered nanocrystal networks fabrication

HAPPLE : Hybrid Anisotropic Plasmon-Photonics for Light Emission
 
SAMPLE : Supramolecular Architectures on Metal for Plasmonic Luminescence Enhancement
 
SAMIRÉ : Active probes for High Resolution Near Field Microscopy
 
COME-ON : Optical Control of the Motion and Organization of Nanoparticles
 
 
29-01-2013
Chemical switching of surface ferroelectric topology

« Back to the Group page « Back to the Contracts page

Project overview

The fundamental property of ferroelectric (FE) materials is their electrically switchable spontaneous polarization below the Curie temperature. However, the direction of the polarization in FE thin films is not only the result of an external electrical potential difference since it usually results from the minimization of the electrostatic energy in the whole sample. The polarization charge at the surface can be screened through a variety of mechanisms including extrinsic screening by adsorbate species, intrinsic screening by defects or free charge carriers in for example adjacent electrodes, surface and near surface structural changes (rumpling, relaxation and reconstruction) and by domain ordering which reduces the energy of the system by screening the depolarizing field through ordering of the FE domains with anti-parallel polarization.

  • The chemical potential can also switch the polarization.
  • Conversely, the polarization can influence surface chemical reactions.

It has been suggested that oxygen vacancies stabilize negative polarization, i.e. polarization pointing inwards. The topology of the surface FE order is therefore a complex interaction of the chemical and electronic environment.

In this project, photoelectron spectroscopy with energy, wave-vector and spatial resolution will be used to study the electronic and chemical structure of the FE topology and the mechanisms responsible for chemically induced switching. Surface composition by high resolution XPS and band structure determination by ARUPS will be compared with theory. Structural determination will include electron diffraction (LEED, RHEED) and X-ray photoelectron diffraction (XPD), while the surface morphology, FE topology and chemistry will be assessed by scanning probe microscopy (SPM) techniques and by low energy electron microscopy (LEEM) and photoelectron emission microscopy (real and reciprocal space PEEM). The project will advance understanding of the electronic, structural, and compositional origins of chemical switching of polarization. It will explore the chemical potential-temperature phase diagrams through the use of atomic oxygen and vicinal surfaces. Finally, it will furnish an understanding of the switching chemistry vital to a wide range of applications such as ferroelectric enhanced catalysis and photolysis, chemical sensing, screening mechanisms in oxide based electronics.

Information

Funding

  • Project ANR Blanc International II - Edition 2012 - France/Roumanie

Coordination

Specifications

  • Funding amount : 332 837 euros
  • Project duration : 36 mois

Related Open Positions

 

Retour en haut