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We consider a model of self-avoiding walk on a lattice with on-site repulsionand an attraction for every vertex of the walk visited on the surface to studyforce-induced desorption of a linear polymer chain adsorbed on an attractivesurface and use the exact enumeration technique for analyzing how the criticalforce for desorption $f_c(T)$ depends on the temperature. The curve $f_c(T)$gives the boundary separating the adsorbed phase from the desorbed phase. Ourresults show that in two dimensions where surface is a line the force $f_c(T)$increases monotonically as temperature is lowered and becomes almost constantat very low temperatures. In case of three-dimensions we, however, findre-entrance, i. e. $f_c(T)$ goes through a maximum as temperature is lowered.The behaviour of the polymer chain at different values of temperature and forceis examined by calculating the probability distribution of the height from thesurface of the vertex at which external force is applied.Comment: Preprint 15 pages with 8figures and two tables. The file table-2d.ps  and table-3d.ps lists C_N(Ns,h) for given N with all possible Ns and h in two  and three dimension

Force-induced desorption of a linear polymer chain adsorbed on an attractive surface