Numerical Study on Electrophoretic Motion of Hydrophobic Nano-Cylinder Particles

Electrophoresis of nano particles due to its widerange of applications like separation of bioparticleand drug delivery has a key role in micro andnanofluidics. in convectional theory of electrokineticphenomena, no-slip condition is assumed for surfaceof particle. but no-slip condition is only valid whenthere is a strong bound between molecules of particleand electrolyte. in other cases, navier slip conditionreplaces no-slip condition. in this paper, weinvestigated effect of hydrophobic surface onelectrophoretic motion of nano cylinder particle. pnpequations with modified boundary condition andwide range of slip length, charge surface density andconcentration for surface of particle was solvednumerically. for each point, electric andhydrodynamic stress were calculated and through aniterative method mobility obtained. results haveshown in all cases by enhancing slip length,electrophoretic mobility increases and hydrodynamicstress decreases. because of conductance effect inparticles with large double layer, effect ofhydrodynamic slip is less than particles with smalldouble layer.