Ovidiu Ersen

Fellowship 2015

ARCHIVE

Professor Ovidiu Ersen is a faculty member of the physics and engineering department at the Strasbourg University, UNISTRA. Since 2014, he belongs, as a junior member, to the “Institut Universitaire de France” that distinguishes excellence in research. He received his education degrees, first at the University of Cluj-Napoca, Romania, and then at the Strasbourg University were he passed a master and a PhD thesis in physics and materials science. As an Assistant Professor, he joined the Institute for Physics and Chemistry of Materials in Strasbourg (IPCMS) in 2003 with the aim of creating a research team dedicated to the study of nanomaterials at the nanoscale using electron microscopy. By combining electron tomography with electron energy loss spectroscopy he pioneered chemical analysis at the nanoscale. His present scientific interest goes along two lines: studying nanomaterials and nano-structures under realistic thermodynamical conditions, developing new 3D-imaging technics allowing quantitative analyses.

Dynamical electron tomography at the atomic scale,

USIAS Fellows : Ovidiu Ersen and John Miao
Post-doc: Georgian Melinte

The development of applications based on nanomaterials calls for ever-more efficient characterization tools. This project aims at gaining the ability to follow, at the atomic scale, the “in situ” evolution of nanoparticles placed under realistic environments. A strong collaboration between the 3D-TEM group of IPCMS and Coherent Imaging Group at UCLA will be able to reach this goal, combining the Strasbourg expertise in the field of in situ environmental microscopy and electron tomography with UCLA's expertise in the field of tomographic studies at the atomic scale. In order to follow the time evolution of a nanoparticle placed under reactive conditions needs, for instance, to dramatically decrease the recording duration of the images series and to align these images with a atomic precision. This will be achieved through the combined effort of the two groups in Strasbourg and Los Angeles to implement specific recording and reconstruction procedures. We plan to study the evolution of single metallic or core-shell nanoparticles dedicated to potential plasmonic applications as model materials.