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In this paper, which completes our earlier short publication [Phys. Rev.Lett. 84, 511 (2000)], we study dynamics of a hard-core tracer particle (TP)performing a biased random walk in an adsorbed monolayer, composed of mobilehard-core particles undergoing continuous exchanges with a vapor phase. Interms of an approximate approach, based on the decoupling of the third-ordercorrelation functions, we obtain the density profiles of the monolayerparticles around the TP and derive the force-velocity relation, determining theTP terminal velocity, V_{tr}, as the function of the magnitude of external biasand other system's parameters. Asymptotic forms of the monolayer particlesdensity profiles at large separations from the TP, and behavior of V_{tr} inthe limit of small external bias are found explicitly.Comment: Latex, 31 pages, 3 figure

Force-velocity relation and density profiles for biased diffusion in an adsorbed monolayer