24 datasets found

National audience

Malgré leur empreinte géographique limitée (3% de la surface terrestre), les tourbières à sphaignes de l'hémisphère Nord renferment 1/3 du stock de carbone (C) des...

National audience

Les impulsions femtosecondes ont trouvé un large panel d'applications dans des domaines variés comme la spectroscopie, le traitement des matériaux ou l'imagerie...

The characterization of the surface of planetary objects, through space observations, gives key clues to the past and present geological, geochemical and climate...

Trois parcelles ont été sélectionnées pour étudier le tassement des sols podzolico vermelho amarelo sous culture de canne à sucre. L'une est une culture de canne à...

Methods to monitor and quantify the chemical reactivity of surfaces at micrometer scale are developed in an optical label-free detector owing to changes in refractive...

International audience

Ce document reprend la structure de mon dossier de candidature au CNRS avec une réflexion sur le contexte et les enjeux de mes recherches suivi d'un aperçu rapide de...

The knowledge of materials used in art works helps for their conservation. Optical coherence tomography (OCT) is a technique that was first developed for imaging in...

We present a new technique that combines off-axis Digital Holography and Dark Field Microscopy to track in three dimensions gold nanoparticles diffusing in a fluid or...

This thesis aims at improving the efficiency of conventional optical tweezers (cOT). They allow to manipulate objects with dimension from a few tens of nanometer to a...

Magneto-rheological fluids are dispersions of magnetic micro-particles in a non-magnetic carrier fluid. Their characteristics vary upon the application of a magnetic...

This thesis is part of the durability of PEMFC and is particularly interested in the degradation of electrocatalysts of type Pt / C that are used within their...

Dans le domaine des nanotechnologies, de nombreux dispositifs incorporant des nano-objets sont développés. Les différents procédés de fabrication sont en général...

International audience

During this PhD thesis, two original microscopes combining an innovative contrast related to THz frequencies (from 0,1 to 10 THz) with the super-resolvent techniques...

International audience

International audience

Road bitumen undergoes, during its service life, an ageing process that leads to a material's hardening. But, when a polymer modified bitumen (PmB) has been used, what...