Remaining coverage in associative desorption process

O. FURLONG, S. MANZI, G. COSTANZA Y V.D. PEREYRA

PHYSICA A - STATISTICAL AND THEORETICAL PHYSICS

Elsevier

Lugar: Amsterdam; Año: 2004 vol. 339 p. 267 - 284

0378-4371

Inthis paper the kinetic of dissociative adsorptionof dimers followed by associative desorption is analyzed.The coupled di erential equations which describe the kinetics of the process were ob- tained by applying the so-called local evolution rules.Particular interest presents the irreversible desorptionprocess.Infact,giventhat desorptionproceeds from the reactin g nearest-n eighbor monomers,a remaining coverage results from those isolated particles when the mobility is neglected,therefore,the resulting con guration can be considered as a jamming state of the system.The exact solution for the remaining coverage is obtained in one-dimensional chain, where the e ect of the lateral interactions are also included.The two-dimensional case is an- alyzed by using Monte Carlo simulation.The equilibrium solutions and the thermal desorption spectra are also studied.