CEMES - Centre National de la Recherche Scientifique


The CEMES laboratory (http://www.cemes.fr/) is one of the main CNRS research institutes which has a long-standing experience in electron microscopy, pioneering several developments in instrumentation: high voltage TEM (first European 1.5 MV and 3 MV TEM), first in-column omega energy filter, many original stages dedicated to in situ TEM experiments, and lately a new CCD detector for imaging and spectra.


In 2004, CEMES has considerably extended its scope both in research interests and accompanying facilities installing a Cs corrected 200 kV TECNAI-F20 microscope, fitted with rotatable electrostatic biprism and a post-column energy filter. This exceptional TEM offers considerable improvement in terms of achievable resolution and reliability of TEM images. The improvement in the CEMES TEM facilities is combined to the development of expertise in the different techniques: HREM, EELS, CBED, in-situ and more recently in Holography. As example, an original method for quantitative image analysis of HRTEM micrographs, namely the Geometrical Phase Analysis, allowing mapping strain fields at the nanometre scale was developed. Toulouse is also expert in EELS experiments and their exploitation by either deriving the local dielectric function from low-loss experiments or by associating core-loss experiment results (particularly ELNES region) with ab-initio calculation for solving local electronic structure. Toulouse continues designing and manufacturing advanced stages for in situ experiments and has developed holography capability for mapping electric and magnetic fields.


The CEMES commitments are both fundamental and applied: understand model and control phenomena from atomic scale to macroscopic / bulk materials in relation with the major present industrial domains (aeronautics, electronics, magnetism, chemistry). The CEMES is strongly engaged towards new frontiers in science and technology such as new materials devices and molecular machines in the realm of nanosciences, nano-materials and nanotechnologies. These fascinating areas point out the possibilities offered by structuring matter atom by atom, reaching more efficient materials or establishing the future of nano-machines



"La Boule" in which a 1.2 MV TEM was built in 1958
The laboratory now houses a Cs corrected electron microscope, the SACTEM-Toulouse