2018年11月2日法国巴黎高等化学学院Bruno Viana教授 学术报告
Thermoluminescence, a tool for characterization of old and new functional materials
Thermoluminescence is an optical characterization technique used as a tool for the control of the age of master pieces at the Louvres museum in Paris (datation), or for dosimetry, but this optical technique can be very useful for the characterization of new materials for medical imaging. Indeed in medical imaging, the development of luminescent materials in various shapes (from single crystals to nanoparticles) requires perfect materials with high fluorescence intensity but also with careful control of the defects which can be well characterized by thermoluminescence.
Thermoluminescence allows the control of the defects/traps and their depths in functional materials. In scintillation, afterglow should be avoided in order to obtain clear and fast images in widely developed PET scan imaging and CT tomography (gamma rays and X-rays imaging respectively). The defects/traps must be carefully controlled to avoid room temperature detrapping and afterglow emission which alter the images. On the opposite case, there is a recent large interest for materials with persistent luminescence. New applications are envisioned with these persistent luminescence materials such as emergency signing, luminous painting, including new optical imaging modalities.
Bruno Viana graduated from the ENSCP in 1984 with a master degree and a PhD degree in Materials Science at UPMC, University P&M Curie, Paris in 1987. He was laureate as CNRS researcher in 1988 and became postdoctoral researcher at UCLA- Los Angeles USA in 1989 and at USC-Los Angeles USA in 1990 in Materials Science and Center for Laser Studies respectively. In 2003 he became Director of Research at the French Research council CNRS. In 2010-2013, he was at the head of the “Photonics Research Group” at the LCMCP Research laboratory. In 2014 he became responsible of the CNRS research network CMDO+ (http://cmdo.cnrs.fr/) and was 3 months invited professor at the University de Kyoto, Japan. Since 2015 he is invited professor one month/year at SCUT University China.
Dr Bruno VIANA is currently a Senior Scientist in the Material Sciences Department (IRCP Laboratory) at the Chimie-Paristech Institute working on the preparation and the characterization of Optical Materials for Photonics with a particular focus on crystals for scintillation and nanomaterials for bioimaging using persistent luminescence nanomaterials. Dr Viana is the authors of 25 patents, has published about 300 SCI-indexed scientific papers and several book chapters on materials for photonics. He has also organized and chaired many conferences, workshops and symposia. Direction/co-direction of 27 Ph-D thesis. His h-index is 56 (Google Scholar).