http://iramis.cea.fr/en/Phocea/Vie_des_labos/Ast/index.php Highlights du IRAMIS http://iramis.cea.fr/en/Phocea/Vie_des_labos/Ast/ast.php?t=actu&id_ast=1560 Fri, 19 Mar 2010 00:00:00 GMT Visualizing the motion of electrons in matter requires both a spatial resolution at the Angstrom scale and a temporal resolution at the attosecond scale (1 as = 10-18 s). Such an "ultra-fast camera" opening a path towards "viewing the electrons" is demonstrated: it allows imaging molecular orbitals using the ultra-short attosecond emission from this orbital in an intense laser field. In a close collaboration, scientists from IRAMIS-SPAM, LCPMR of the Univ. Paris 6 and from http://iramis.cea.fr/en/Phocea/Vie_des_labos/Ast/ast.php?t=actu&id_ast=1560 http://iramis.cea.fr/en/Phocea/Vie_des_labos/Ast/ast.php?t=actu&id_ast=1546 Mon, 01 Feb 2010 00:00:00 GMT Imogolites (OH)3Al2O3Si(OH) are natural minerals discovered in 1962 in Japanese volcanic soils. Their structure is similar to that of a carbon nanotube. They are made of a curved Gibbsite  sheet Al(OH)3  forming a nanotube of 2 nm in diameter. The tetrahedral silicon adsorbed inside the nanotube controls  its curvature. The diificulties to synthesized  large quantities of  this  mineral have indered the development of industrial applications. Recently a new http://iramis.cea.fr/en/Phocea/Vie_des_labos/Ast/ast.php?t=actu&id_ast=1546 http://iramis.cea.fr/en/Phocea/Vie_des_labos/Ast/ast.php?t=actu&id_ast=1522 Sun, 20 Dec 2009 00:00:00 GMT Superconducting pairing and electronic anomalies induced by the spin collective mode in high Tc cuprate superconductors Discovered in 1986, superconductivity at high critical temperature remains today one of the great questions in solid state physics and material studies. Several theoretical models are today in competition and regularly confronted with experimental results. Among possible theories, those involving the magnetism in the coupling interaction forming the superconducting electron http://iramis.cea.fr/en/Phocea/Vie_des_labos/Ast/ast.php?t=actu&id_ast=1522 http://iramis.cea.fr/en/Phocea/Vie_des_labos/Ast/ast.php?t=actu&id_ast=1530 Fri, 04 Dec 2009 00:00:00 GMT Scientists at the "Laboratoire de chimie et biologie des métaux" (CEA-CNRS-Université J. Fourier, CEA-Grenoble), "Laboratoire de chimie des surfaces et interfaces" (CEA-Saclay) and a team at the Laboratoire d'innovation pour les technologies des énergies nouvelles et les nanomatériaux" (CEA Grenoble) have combined nanoscience and bio-inspired chemistry to develop, for the 1st time, a paltinum free material capable of catalyzing both production of hydrogen and its use http://iramis.cea.fr/en/Phocea/Vie_des_labos/Ast/ast.php?t=actu&id_ast=1530 http://iramis.cea.fr/en/Phocea/Vie_des_labos/Ast/ast.php?t=actu&id_ast=1531 Tue, 17 Nov 2009 00:00:00 GMT Making still smaller and less power consuming digital memories for mobile electronics? Scientists from CNRS and University Paris Sud XI (Laboratory of Solid State Physics, CNRS / Univ. Paris-Sud 11 and Institut Néel) and CEA-IRAMIS come to demonstrate the feasibility, thanks to a new class, said multiferroic, of materials combining unusual electrical and magnetic properties. This text is a translation of the joint press release from CEA-CNRS-Univ. Paris XI In a http://iramis.cea.fr/en/Phocea/Vie_des_labos/Ast/ast.php?t=actu&id_ast=1531 http://iramis.cea.fr/en/Phocea/Vie_des_labos/Ast/ast.php?t=actu&id_ast=1526 Mon, 16 Nov 2009 00:00:00 GMT - J. Kermorvant, Laboratoire des Solides Irradiés & Unité Mixte CNRS-Thalès (Palaiseau)- C.J. van der Beek, Laboratoire des Solides Irradiés, Ecole Polytechnique- Collaboration J. Briatico, B. Marcilhac, J.C Mage, Unité Mixte CNRS-Thalès (Palaiseau), ANR Blanc grant 07-1-193024 "SURF"   The use of high temperature superconductors remains a critical challenge. For applications in telecommunications, it is shown here that Joule heating is http://iramis.cea.fr/en/Phocea/Vie_des_labos/Ast/ast.php?t=actu&id_ast=1526 http://iramis.cea.fr/en/Phocea/Vie_des_labos/Ast/ast.php?t=actu&id_ast=1524 Mon, 09 Nov 2009 00:00:00 GMT The mechanical properties of boron carbide at high pressure, explained from first principles. By theoretical methods based on the density functional theory (DFT and DFPT) [1] [2], the physical properties of boron carbide have been studied for different carbon concentrations and versus temperature and pressure. A type of defect is identified, whose appearance at high pressure and high temperature, can explain the poor mechanical strength upon impact of the material . These results point the way http://iramis.cea.fr/en/Phocea/Vie_des_labos/Ast/ast.php?t=actu&id_ast=1524 http://iramis.cea.fr/en/Phocea/Vie_des_labos/Ast/ast.php?t=actu&id_ast=1452 Wed, 30 Sep 2009 00:00:00 GMT After the realization in 2002 of one of the first solid state quantum bits (qubits), scientists from the Quantronique IRAMIS-SPEC research group have performed a further step towards the realization of  an elementary quantum processor: the accurate and non destructive readout of such a qubit. http://iramis.cea.fr/en/Phocea/Vie_des_labos/Ast/ast.php?t=actu&id_ast=1452 http://iramis.cea.fr/en/Phocea/Vie_des_labos/Ast/ast.php?t=actu&id_ast=1448 Tue, 29 Sep 2009 00:00:00 GMT A. Cassimi, D. Hennecart, J. Rangama, T. Been,  D. Lelièvre, J.-M. Ramillon,  -  CIMAP, CEA-CNRS, Caen,T. Muranaka CEA-IRFU SaclayA. Leredde, X. Fléchard, LPCH. Shiromaru, J. Matsumoto,  K.-I. Hayakawa Tokyo Metropolitan University By exploring matter with energetics ions, the charge distribution between the ionic fragments, informs us about the nature of atomic bonds. It has thus been observed that the charge induced by ionisation is more evenly http://iramis.cea.fr/en/Phocea/Vie_des_labos/Ast/ast.php?t=actu&id_ast=1448 http://iramis.cea.fr/en/Phocea/Vie_des_labos/Ast/ast.php?t=actu&id_ast=1447 Tue, 22 Sep 2009 00:00:00 GMT Amphiphilic molecules have a hydrophilic head and a hydrophobic chain. Under certain conditions, they can self-organize into hollow spherical hollow vesicles with a surfactant bilayer enclosing an aqueous core, the overall diameter ranging from a few tens of nanometers to several microns. By carefully choosing specific preparation conditions, the scientists of SIS2M have shown that extremely robust aggregates can be synthesized with an interesting potential for encapsulation. The vesicles are http://iramis.cea.fr/en/Phocea/Vie_des_labos/Ast/ast.php?t=actu&id_ast=1447