01641nas a2200169   4500008004100000022001400041245008500055210006900140260000900209300001100218490000800229520104300237100002201280700002501302700003401327856011001361       2017                        eng d  a0021-960600aFickian yet non-Gaussian behaviour: A dominant role of the intermittent dynamics0 aFickian yet nonGaussian behaviour A dominant role of the intermi  cAPR   a1345040 v1463 a<p>We present a study of the dynamics of small solute particles in a solvent medium where the solute is much smaller in size, mimicking the diffusion of small particles in crowded environment. The solute exhibits Fickian diffusion arising from non-Gaussian Van Hove correlation function. Our study shows that there are at least two possible origins of this non-Gaussian behaviour: the decoupling of the solute-solvent dynamics and the intermittency in the solute motion, the latter playing a dominant role. In the former scenario when averaged over time long enough to explore different solvent environments, the dynamics recovers the Gaussian nature. In the case of intermittent dynamics the non-Gaussianity remains even after long averaging and the Gaussian behaviour is obtained at a much longer time. Our study further shows that only for an intermediate attractive solute-solvent interaction the dynamics of the solute is intermittent. The intermittency disappears for weaker or stronger attractions. Published by AIP Publishing.</p>1 aAcharya, Sayantan1 aNandi, Ujjwal, Kumar1 aBhattacharyya, Sarika, Maitra  uhttps://library.ncl.res.in/content/fickian-yet-non-gaussian-behaviour-dominant-role-intermittent-dynamics00580nas a2200133   4500008004100000245010900041210006900150260000800219490000800227100002200235700002500257700003400282856013000316       2019                        eng d00aFickian yet non-Gaussian behaviour: A dominant role of the intermittent dynamics (vol 146, 134504, 2017)0 aFickian yet nonGaussian behaviour A dominant role of the intermi  cAUG0 v1511 aAcharya, Sayantan1 aNandi, Ujjwal, Kumar1 aBhattacharyya, Sarika, Maitra  uhttps://library.ncl.res.in/content/fickian-yet-non-gaussian-behaviour-dominant-role-intermittent-dynamics-vol-146-134504-2017