We propose a model for planar nanoscale dielectric capacitor consisting of a
single layer, insulating hexagonal boron nitride (BN) stripe placed between two
metallic graphene stripes, all forming commensurately a single atomic plane.
First-principles density functional calculations on these nanoscale capacitors
for different levels of charging and different widths of graphene - BN stripes
mark high gravimetric capacitance values, which are comparable to those of
supercapacitors made from other carbon based materials. Present nanocapacitor
model allows the fabrication of series, parallel and mixed combinations which
offer potential applications in 2D flexible nanoelectronics, energy storage and
heat-pressure sensing systems.Comment: Published version in PR
