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Jan 10, 2019
L’avènement des lasers femtosecondes (1fs = 10-18s) de puissance avec la technique "Chirped Pulse Amplification" (CPA) [1] permet aujourd’hui de délivrer des intensités lumineuses gigantesques (> 1021 W.cm-2) associées à des champs électriques ultra-intenses de l’ordre de 1013 V.m-1.
Jul 18, 2011
( Version française) Stress corrosion - combined action of mechanical stress and corrosion by water from the surrounding atmosphere - is often the cause of crack propagation in glasses. A study by neutron reflectivity at the Laboratoire Léon Brillouin (IRAMIS / LLB) of samples of silica glass fractured under an atmosphere of heavy water (D2O) shows a high penetration of water into the glass.
Feb 15, 2011
Jérôme Polesel Maris, José Moran Meza, Christophe Lubin, François Thoyer, Jacques Cousty
Les chercheurs du SPCSI viennent de mettre au point un nouveau microscope à sonde locale permettant la caractérisation fine des couplages mécano-électriques d’édifices moléculaires. Cet appareil, combinaison d'un STM et d'un AFM, est basé sur un capteur intégré piézoélectrique maintenu en oscillation à sa fréquence de résonance.
Nov 24, 2010
C. Hrelescu, T. K. Sau, A. L. Rogach, F. Jäckel, G. Laurent, L. Douillard et F. Charra
In optics, the possibility to confine light below its natural wavelength is hampered by the longstanding barrier of the diffraction limit. Surface plasmons are electromagnetic surface waves coupled to free electrons at metal dielectric interfaces. They offer a unique opportunity for scaling down photonic devices to the nanometre range.
Dec 04, 2009
Scientists at the "Laboratoire de chimie et biologie des métaux" (CEA-CNRS-Université J.
Nov 16, 2009
O.Bezencenet, A.Barbier, D.Bonamy, R.Belkhou (SOLEIL), P.Ohresser (SOLEIL)
With the advent of spin electronics (spintronics), it became particularly important to visualize and understand how magnetic domains form in magnetic structures. This is particularly tricky for antiferromagnetic layers, which show no macroscopic magnetization and therefore interact weakly with probes. Antiferromagnetic layers are essential elements in magnetic heterostructures where they are used to pin the magnetization of adjacent layers via magnetic exchange coupling.
Mar 23, 2009
J. Charlier, A. Ghorbal, F. Grisotto, S. Palacin
The development and implementation of micro- and bio-electronic devices often need the deposition of layers of organic substances on conductive or semiconducting surfaces. In that aim, surface chemical reactions (or grafting) are very effective. The miniaturization of electronic components requires the realization of a very localized grafting, at the micron and even sub-micron scale.
Jul 15, 2008
D. Bonamy and L. Ponson (SPCSI), D. Santucci (Fysik Institutt Oslo)
Fracture is a phenomenon of everyday life: it is observable at all scales of condensed matter, from the atomic scale (in nanostructures) to the scale of our planet marked by fractures in the continental plates. But, can we find a unifying model to describe the phenomenon? The dynamics of fracture is complex.
Mar 11, 2008
Ludovic Douillard1, Fabrice Charra1, Zbigniew Korczak1, Renaud Bachelot2, Sergei Kostcheev2, Gilles Lerondel2, Pierre-Michel Adam2 and Pascal Royer2 1CEA-Saclay, DSM/IRAMIS/SPCSI Service de Physique et Chimie des Surfaces et Interfaces,2Laboratoire de Nanotechnologie et d’Instrumentation Optique, ICD CNRS FRE 2848, Université de Technologie de Troyes
Sep 21, 2007
Vincent Mévellec, Sébastien Roussel, Guy Deniau, Serge Palacin
Polymer grafting on surfaces conducting electricity is one major topic of the activities of the "Laboratoire de Chimie des Surfaces et Interfaces (LCSI)" directed by Serge Palacin. Many patents deposited on the electro-grafting (eG©) process contributed to the creation 5 years ago of the first start-up resulting from the Science of Matter Division (CEA/DSM): Alchimer.
Mar 14, 2007
From R. Feynman's idea at the origin of nanotechnologies “There's plenty of room at the bottom”, emerged a new discipline: “physics of surfaces”. After the emergence of the near-field microscopies, this topic remains alive today with the current developments of new techniques of electronic imagery.
Apr 11, 2006
Ludovic Douillard et Fabrice Charra, DRECAM/SPCSI/Groupe Nanophotonique
A reduction of the size of a metallic object results in significant changes in its physical properties and in particular its response to an optical excitation. Noticeably, for objects of sizes significantly smaller than the incident wavelength, resonances in the absorption spectrum appear. These, called plasmon resonance, correspond to a process of collective oscillation of the electrons, as described by Mie at the beginning of the 20th century [Mie 1908].

 

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