  The interaction mechanisms of water with nanoscale geometries remain poorly
understood. This study focuses on behaviour of water clusters under varying
external electric fields with a particular focus on molecular ferroelectric
devices. We employ a two-fold approach, combining experiments with large-scale
molecular dynamics simulations on graphene nanoribbon field effect transistors.
We show that bilayer graphene nanoribbons provide stable anchoring of water
clusters on the oxygenated edges, resulting in a ferroelectric effect. A
molecular dynamics model is then used to investigate water cluster behaviour
under varying external electric fields. Finally, we show that these nanoribbons
exhibit significant and persistent remanent fields that can be employed in
ferroelectric heterostructures and neuromorphic circuits.
