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We investigate the translocation of rods with different charge distributionsusing hybrid Langevin Dynamics and Lattice Boltzmann (LD-LB) simulations.Electrostatic interactions are added to the system using the $P^3M$ algorithmto model the electrohydrodynamic interactions (EHI). We first examine thefree-solution electrophoretic properties of rods with various chargedistributions. Our translocation simulation results suggest that the orderparameter is asymmetric during the capture and escape processes despite thesymmetric electric field lines, while the impacts of the charge distribution onrod orientation are more significant during the capture process. Thecapture/threading/escape times are under the combined effects of chargescreening, rod orientation, and charge distributions. We also show that themean capture time of a rod is shorter when it is launched near the wall becauserods tend to align along the wall and hence with the local field lines.Remarkably, the \textit{orientational capture radius} we proposed previouslyfor uniformly charged rods is still valid in the presence of EHI.

Capture and translocation of a rod-like molecule by a nanopore: orientation, charge distribution and hydrodynamics