Nonlocal Dielectric Response of Water in Nanoconfinement
Geoffrey Monet, Fernando Bresme, Alexei A. Kornyshev, Hélène Berthoumieux
Abstract
Recent experiments reporting a very low dielectric permittivity for nanoconfined water have renewed the interest in the structure and dielectric properties of water in narrow gaps. Here, we describe such systems with a minimal Landau-Ginzburg field theory composed of a nonlocal bulk-determined term and a local water-surface interaction term. We show how the interplay between the boundary conditions and intrinsic bulk correlations encodes the dielectric properties of confined water. Our theoretical analysis is supported by molecular dynamics simulations and comparison with the experimental data.
Topics & Concepts
DielectricDielectric responseMaterials scienceCondensed matter physicsPhysicsOptoelectronicsNanopore and Nanochannel Transport StudiesElectrostatics and Colloid InteractionsSpectroscopy and Quantum Chemical Studies