Chaos in nanopores

Nanofluidics has found itself in many applications ranging from water desalination, gas separation, fluidic circuits and DNA sequencing. In all these applications one of the important measuring signals is noise. Noisy signal disrupts the exact measuring signal in almost all of these applications. In this abstract, we rationalize whether current oscillations have to be classified only as noise or does the physical disturbance in ionic charges has some other meaning? We infer that the physical disturbance in ionic charges are not noise but can be viewed as chaos. Chaos is present in the system due to the depletion of the ions, created by the nonequilibrium an-harmonic electrostatic potential distribution, i.e., multi-potential wells are observed inside the nanopore. This multi-well potential distribution leads to bi-directional hopping of ions as the ions transport through the pore. The bi-directional hopping results in current oscillations. Thus, we say the notion of chaos exists from deterministic perspective. We prove this case by considering a simple oscillator model involving the electrostatic and dissipative forces to model ionic current.