Pr. Mona Treguer-Delapierre
Mona is a faculty member in Chemistry at U.Bordeaux. She has a PhD in Physical Chemsitry (1999) from the University of Orsay, France, where she worked in the group of J.Belloni. She did postodoctoral research with Dan Meisel at the Radiation Laboratory before joining the faculty in Bordeaux in 2000. She is the group leader of the ‘Chemistry of Nanomaterials’ group at the Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB). Co-author of over 100 scientific papers and 10 patents, M.Tréguer-Delapierre is expert is the colloidal synthesis of metal nanoparticles and assembly to control their optical properties. She pursues fundamental studies of coupled plasmonic systems as well as applications of plasmonics in optoelectronics, chemical sensing, photocatalysis, metamaterials.
Gold nanostructures made from patchy colloidal spheres
Highly symmetric plasmonic clusters of subwavelength-scale, in which the metal surfaces are separated by nanoscale gaps leads to interesting physics. They have remarkable optical properties that can result in the generation of optical magnetism. This amazing effect is of interest for the development of applications in a range of exciting new research fields : cloaking, imaging, and optical communications. For such applications, the morphology must be precisely controlled : a modification of the number of plasmonic nanoparticles or a variation of just a few nanometers in the gap distances between different nanoparticles within the clusters can affect the collective modes and resonances and would broaden or weaken the bulk optical response. In this talk, I will show that it is possible to achieve this control by combining multiple synthesis steps involving inorganic growth, polymerization, and metal deposition. This multi-step colloidal synthesis approach allows a high degree of control over morphology (with nearly 90% yield of the same morphology), high precision (nanometer-scale control over gap distance), and the ability to scale up the fabrication to bulk quantities.