Elaborating nanoparticles with controlled size, shape and composition are key points for using them in advanced materials. They are considered as building blocks for new devices or as part of new hybrid materials for various applications. We develop elaboration strategies in order to get small sizes and a narrow size distribution.
Iron oxide 1) as the oxide core of nanosystems usable in nanomedicine and 2) as building blocks of nanodevices in spintronics.
Iron oxide nanoparticles are synthesized by two methods:
High quality iron oxide nanoparticles with narrow size distribution and average particle size between 2 nm up to 30 nm have been obtained, allowing subsequent investigations of their size-dependent structural and magnetic properties.
In IPCMS, the metallic nanoparticles studied are alloy nanoparticles for applications as high density magnetic recording media or catalysis.
They are prepared using sputtering or MBE as dewetting of plain films at high temperature. After a first step where particles were formed on amorphous or polycrystalline substrates, epitaxied nanoparticles are now prepared with MgO or NaCl substrates.
CoPt nanoparticles epitaxied on NaCl and observd using STEM-HAADF (left: bright field,right: (...)