Faits marquants 2011

Décembre 2011

06 décembre 2011
Contact: Fernando González-Posada
Semiconductor nanowires have become the building blocks for the fabrication of a new generation of photonic components. In this context, the CEA-CNRS joint group NPSC fabricates high crystalline quality GaN nanowires.
03 décembre 2011
Modeling strongly correlated systems is a very delicate task. For instance, the theory for the phonon spectrum of uranium has only been available since 2008.
02 décembre 2011
Contact: Peter Reiss
In collaboration with Leti, we have successfully transferred fluorescent semiconductor nanocrystals into aqueous medium without degrading their colloidal stability nor their fluorescence efficiency.

Novembre 2011

05 novembre 2011
Two-phase thermal links can transfer high power over long distances with an attractive efficiency/mass ratio. At cryogenic temperatures, a priming system is needed to reach the operating temperature.
03 novembre 2011
Contact: Van Dai Nguyen
Magnetic imaging techniques can be used to observe magnetic walls. We have shown that this can also be achieved by measuring electrical resistance. This is done based on the collective vibrations of the magnetic moments (magnons).

Octobre 2011

20 octobre 2011
Some of the secrets of fuel cell electrodes have been uncovered thanks to large facilities: microstructure and transport properties have recently been studied by neutron scattering in the in the context of a joint Nissan and CEA work project.
17 octobre 2011
Contact : Yoann ROUPIOZ
Yoann Roupioz (CR1 CNRS, SPrAM) a reçu un des quatre prix décernés en 2011 par la société japonaise HORIBA.
04 octobre 2011
The distribution of cold power in cryogenic systems is becoming increasingly important, in particular because of the replacement of cryogen baths by mechanical cryocoolers which are local cold sources. Two-phase systems (heat pipes) are good candidates to address this new problem.
02 octobre 2011
Contact : Arnaud BUHOT
Deux étudiants du SPrAM, Feriel Mélaïne et Robin Pinilla, font partie de l'équipe mixte UJF/Grenoble-INP qui s'est qualifiée pour la finale mondiale de la compétition iGEM à Boston (USA) les 5-7 novembre prochains.
02 octobre 2011
Contact: Gilles Gaudin
Spintec researchers, in collaboration with the Catalan Institute of Nanotechnology and the Autonomous University of Barcelona have developed a new technique to write information in a magnetic memory cell in a more stable manner and at a lower energy cost.

Septembre 2011

23 septembre 2011
Ce résultat fait la couverture de Phys. Rev Lett. 107 (13). L'article signé par S. Raymond et al.
08 septembre 2011
In the same way that the invention of the transistor revolutionized electronics, the development of ultrafast all-optical switches is a major stake for very high rate information processing, for instance for very high rate telecommunications.
05 septembre 2011
In a molecule bearing several unpaired local spins, one of the pertinent parameters that govern its magnetic properties is the magnetic exchange interaction constant J that describes the way spins “talk to each other” through the atoms connecting them (bridges).
01 septembre 2011
JT-60SA is the future tokamak of the Japan Atomic Energy Agency (JAEA). Superconductive magnets will be used to confine the plasma. The fusion reactor is jointly constructed through the Broader Approach Agreement involving Europe and Japan and it shall be in operation in 2016.

Août 2011

23 août 2011
Le numéro de septembre des C.R. Physique propose un dossier intitulé Nanosciences et nanotechnologies:espérances et inquiétudes coordonné par J. Villain et L. Laurent.

Juillet 2011

01 juillet 2011
Le numéro de juin-août des C.R. Physique est consacré à la supraconductivité des systèmes fortement corrélés.

Juin 2011

04 juin 2011
An ambitious instrumental project has just succeeded in the LEMOH laboratory, providing a way for developing mesoscopic devices within an atomic force microscope (AFM), by evaporation through a mask, in combined mode with imaging.
01 juin 2011
Pulsed ESR (electron spin resonance) is a method of magnetic resonance where magnetic moments associated with electronic spins are detected and analyzed.

Mai 2011

09 mai 2011
Evan SPADAFORA, en thèse au SPrAM/LEMOH, a reçu un "Graduate student research award" lors de l'E-MRS spring Meeting qui s'est tenu à Nice du 9 au 13 mai 2011.
05 mai 2011
Jean-Philippe Attané est Maître de Conférences UJF à l’UFR PHITEM. Il mène ses activités de recherche au sein du laboratoire Nanostructure et Magnétisme (SP2M/NM).
05 mai 2011
Contact: Joël Eymery
The CEA-CNRS-UJF joint “nanophysics and semiconductors” group studies the vapor phase growth of GaN-based nanostructures, including InGaN heterostructures. By understanding the growth mechanisms, we can obtain original structures such as wires or pyramids.
04 mai 2011
Based on numerical simulations, we have reached a new step in our understanding of the mechanisms that drive the growth of carbon nanotubes.   One of the most commonly used methods for synthesizing carbon nanotubes is chemical vapor deposition (CVD).
03 mai 2011
Contact: Lionel Duband
Gaze at the Eagle Nebula, close to the centre of our Galaxy. Star forming regions can be spotted in this picture (centre and left portion). According to astrophysicists, hundreds of stars are born here.

Avril 2011

05 avril 2011
Contact: Xavier Jehl
We have designed and fabricated the first electron pump using silicon on insulator (SOI) in a standard microelectronics technology. These devices could be used as electrical current standards.
02 avril 2011
Contact: Éric Gautier
At Spintec, in collaboration with the Laboratory of Advanced Microscopy of SP2M, we have developed a sample preparation technique for electron holography imaging.
02 avril 2011
Contact: Daniel Communal
In collaboration with SPrAM, SBT has developed a temperature sensor based on fluorescent nanocrystals and optical fiber for temperature measurements in the range 4-40 K.   This type of sensor is based on the fluorescence decay of nanocrystals. The decay time, i.e.

Mars 2011

04 mars 2011
Semiconductor quantum dots have potential applications, in particular in the field of quantum cryptography. The precise determination of the emission properties of these emitters is thus an important stake.
03 mars 2011
The impact of nanoparticles on health is a burning question for the general public. Teams from the SCIB and IRAMIS/SPAM have studied the damage caused to cultured human cells by nanoparticles of titanium dioxide, used in sunscreens and in paints.
01 mars 2011
Contact: Gérard Gebel
A fuel cell generates electricity, heat and water. Water distribution strongly impacts the performance of the battery: the how and why deserves attention! Researchers at Inac and Liten had already put an operating fuel cell in a neutron beam. Now they have placed the system in an X-ray beam at ESRF.

Février 2011

04 février 2011
Contact: Abhinav Jain
Ferromagnetic semiconductors are very attractive for spintronics: the spin polarization of carriers is strong and the magnetic properties can be controlled with an electric field.
02 février 2011
Contact: Manuel Houzet
The maximum supercurrent (I.e. the dissipationless current) that can flow through a Josephson junction made of two superconductors separated by ferromagnetic material, strongly decreases with the thickness of this latter material.
01 février 2011
Were you aware that atomic disorder in a metal could result in a quantum transition to an insulating state? Then, what about it when the metal is also a superconductor? Spatially resolved tunneling spectroscopy has revealed the spectral signature of this transition in this paradoxical context.


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