Jean-Sébastien Micha

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We studied at the molecular level the interaction between neutral detergent Triton X-100 aqueous solution and a phospholipid Langmuir monolayer deposited on top using surface pressure measurement and grazing incidence X-ray diffraction (GIXD). Macroscopically, the detergent-phospholipid system follows the Gibbs law. However, GIXD shows that the detergent(More)
Aix-Marseille Université, CNRS, Université de Toulon, IM2NP UMR 7334, 13397 Marseille, France, CEA, INAC, SP2M/NRS, 17 rue des Martyrs, 38054 Grenoble, France, Max Plank Institute for Intelligent Systems, Heisenbergstrasse 3, 70569 Stuttgart, Germany, and Université Pierre et Marie Curie, CNRS, Institut des Nanosciences de Paris UMR7588, 4 place Jussieu,(More)
As the length scale of sample dimensions is reduced to the micron and sub-micron scales, the strength of various materials has been observed to increase with decreasing size, a fact commonly referred to as the 'sample size effect'. In this work, the influence of temperature on the sample size effect in copper is investigated using in situ microcompression(More)
The relevance of micro Laue diffraction tomography (m-LT) to investigate heterogeneous polycrystalline materials has been studied. For this purpose, a multiphase solid oxide fuel cell (SOFC) electrode composite made of yttriastabilized zirconia and nickel oxide phases, with grains of about a few micrometres in size, has been analyzed. In order to calibrate(More)
Cracking is observed when a UO2 single crystal is oxidised in air. Previous studies led to the hypothesis thatcracking occurs once a critical depth of U3O7 oxidised layer is reached. We present some μLaue X-Ray diffraction results, which evidence that the U3O7 layer, grown by topotaxy on UO2, is made of domains with different crystalline orientations. This(More)
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