Thesis
In situ and real time characterization of nanomaterials by plasma spectroscopy
Atomic and molecular physics
Radiation-matter interactions
The objective of this Phd is to develop an experimental device to perform in situ and real time elemental analysis of nanoparticles during their synthesis (by laser pyrolysis or flame spray pyrolysis). Laser-Induced Breakdown Spectroscopy (LIBS) will be used to identify the different elements present and to determine their stoichiometry.
Preliminary experiments conducted at LEDNA have shown the feasibility of such a project and in particular the acquisition of a LIBS spectrum of a single nanoparticle. Nevertheless, the experimental device must be developed and improved in order to obtain a better signal to noise ratio, to decrease the detection limit, to take into account the different effects on the spectrum (effect of nanoparticle size, complex composition or structure), to automatically identify and quantify the elements present.
In parallel, other information can be sought (via other optical techniques) such as the density of nanoparticles, the size or shape distribution.
Preliminary experiments conducted at LEDNA have shown the feasibility of such a project and in particular the acquisition of a LIBS spectrum of a single nanoparticle. Nevertheless, the experimental device must be developed and improved in order to obtain a better signal to noise ratio, to decrease the detection limit, to take into account the different effects on the spectrum (effect of nanoparticle size, complex composition or structure), to automatically identify and quantify the elements present.
In parallel, other information can be sought (via other optical techniques) such as the density of nanoparticles, the size or shape distribution.
SL-DRF-24-0388
Connaissance dans au moins l’un des domaines suivants: physico-chimie, nanomatériaux, spectroscopie atomique. L’absence de connaissances dans plusieurs de ces domaines pourra être complétée durant la thèse et n’est pas rédhibitoire.
October 1 2024
Paris-Saclay
Sciences Chimiques: Molécules, Matériaux, Instrumentation et Biosystèmes (2MIB)
Saclay
CEA
Direction de la Recherche Fondamentale
Institut rayonnement et matière de Saclay
Service Nanosciences et Innovation pour les Materiaux, la Biomédecine et l’Energie
Laboratoire Edifices Nanométriques