  We present a study of self-driven flow dynamics at the liquid-gas interface
within nanofluidic pores, devoid of any external driving forces. The
investigation centres on the Rayleigh-Taylor instability phenomena occurring in
sub-100 nanometre-scale fluidic pores situated within a micrometer-scale water
and air domain. This research rigorously validates our flow velocity equation
using simulation results while delving into the mass transfer efficiency of
these intricate flow structures. Notably, we introduce a concept - an 'active
solid-state nanopore' - that exhibits self-driven flow switching behaviour,
transitioning between active and passive states without the need for mechanical
components. This study reveals highly nonlinear and complex fluid dynamics
within nanoscale dimensions, marking an exploration in this domain at room
temperature. Implications of self-driven nanofluidics extend across diverse
fields, from enhancing biosensors and healthcare applications to advancing
net-zero sustainable energy production and contributing to the fundamental
understanding of fluid dynamics in confined spaces.
