X-rays are used to investigate the structural properties of solids, liquids or gels. Photons interact with electrons, and provide information about the fluctuations of electronic densities in heterogeneous matter. A typical experimental set-up is shown on Figure : a monochromatic beam of incident wave vector is selected and falls on the sample. The scattered intensity is collected as a function of the so-called scattering angle 2 teta.
The scattered intensity I(q) is the Fourier Transform of the correlation function of the electronic density.
Small angle scattering experiments are designed to measure I(q) at very small scattering vectors in order to investigate systems with characteristic sizes ranging from crystallographic distances (few Å) to colloidal sizes (up to few microns).
description of different experiment at LIONS :
Maj : 30/06/2016 (737)
Jun Han (PhD), Sergio Gomez (PhD, University of Vigo), Zeliha Cansu Canbek (running PhD), Fabien Hubert (PhD 2009), Benjamin Abécassis (PhD 2006), Fabienne Testard, Olivier Spalla
General objectives We aim at understanding the microscopic mechanisms controlling the formation of nanoparticles. Different types of NPs are studied in the LIONS and among them gold NPs have already been the subject of several achieved PhD (B. Abécassis and F. Hubert) and ... Lire la suite »