Ultraconfinement of aqueous electrolytic solutions within hydrophilic nanotubes

摘要: By means of molecular simulations we shed light on the interplay surface, confinement and salt effects structure dynamics water ions highly confined within a hydrophilic silica nanotube. local description hydrogen bonding network, disentangle surface effects. In general, concentration dependence is strongly exacerbated under high confinement. Thus, effect enhances formation Na–Cl clusters which affect water. We show that interlayer corresponds to minimum in radial density linked an unexpected increase bonds number while dynamically highlight subdiffusive regime together with interfacial dipolar relaxation time for molecules as NaCl increases. Energetically speaking demonstrate cohesion HB network decreases significantly restrictive geometry.