Structural Fluctuations at Nanoscale and Cooperative Molecular Dynamics in Bulk Water

, providing clear evidence that intermolecular interactions in water extend beyond the distances between nearest neighbors. Our study reveals the existence of a picosecond cooperative process in water, whose nature could be related to the cooperative rearrangements of several water molecules. This process may act as a precursor to large-scale transport related to viscosity. Our results help to improve the understanding of general transport mechanisms at the nanoscale, which can be useful for biomedical technologies or the development of nanofluidic devices.