par Boon, Jean-Pierre 
;Lutsko, James
Référence Journal of statistical physics, 161, 6, page (1366-1378)
Publication Publié, 2015-12
;Lutsko, James Référence Journal of statistical physics, 161, 6, page (1366-1378)
Publication Publié, 2015-12
Article révisé par les pairs
| Résumé : | The nonlinear theory of anomalous diffusion is based on particle interactions giving an explicit microscopic description of diffusive processes leading to sub-, normal, or super-diffusion as a result of competitive effects between attractive and repulsive interactions. We present the explicit analytical solution to the nonlinear diffusion equation which we then use to compute the correlation function which is experimentally measured by correlation spectroscopy. The theoretical results are applicable in particular to the analysis of fluorescence correlation spectroscopy of marked molecules in biological systems. More specifically we consider the cases of fluorescently labeled lipids in the plasma membrane and of fluorescent apoferritin (a spherically shaped oligomer) in a crowded dextran solution and we find that the nonlinear correlation spectra reproduce very well the experimental data indicating sub-diffusive molecular motion. |
