A new measurable NMR parameter to probe subdiffusion processes in complex systems

by Dr Marco Palombo (NeuroSpin, I2BM, Commissariat à l’Énergie Atomique, CNRS, Gif-sur-Yvette, France)

Thursday 27 Mar 2014, 16:00 → 17:00 Europe/Rome

Aula Rasetti (Dipartimento di Fisica - ed. G. Marconi)

Nowadays Nuclear Magnetic Resonance diffusion (dNMR) measurements of water molecules in heterogeneous systems have broad applications in material science, biophysics and medicine. Recently, according to the continuous time random walk framework, we have introduced a new dNMR measurable parameter, a , quantifying the subdiffusion regime in heterogeneous, porous and complex systems. By using Molecular Dynamics and 3D Monte Carlo simulations together with experimental results obtained in materials and biological tissues, we have demonstrated that a provides a quantitative characterization of structural disorder and structural transition in heterogeneous systems. Moreover a quantifies the fractal dimension of the diffusion process in fractal-like systems due to its characteristic to be a multi-scale probe.