Nanoconfined Water-Ion Coordination Network for Flexible Energy Dissipation Device.

Water-ion interaction in a nanoconfined environment that deeply constrains spatial freedoms of local atomistic motion with unconventional coupling mechanisms beyond that in a free, bulk state is essential to spark designs of a broad spectrum of nanofluidic devices with unique properties and functionalities. Here, we report that the interaction between ions and water molecules in a hydrophobic nanopore forms a coordination network with an interaction density that is nearly four-fold as that of the bulk counterpart. Such strong interaction facilitates the connectivity of the water-ion network and is uncovered by corroborating the formation of ion clusters and the reduction of particle dynamics. We design a liquid-nanopore energy dissipation system and demonstrate in both molecular simulations and experiments that the formed coordination network controls the outflow of confined electrolytes along with a pressure reduction, capable of providing flexible protection to personnel and devices and instrumentations against external mechanical impacts and attacks. This article is protected by copyright. All rights reserved.