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Using Monte Carlo simulations, we study the dynamic transitions in theunzipping of an adsorbed homogeneous polymer on a surface (or wall). Weconsider three different types of surfaces. One end of the polymer is alwayskept anchored, and other end monomer is subjected to a periodic force withfrequency $\omega$ and amplitude $g_0$. We observe that the force-distanceisotherms show hysteresis loops in all the three cases. For all the threecases, it is found that the area of the hysteresis loop, $A_{loop}$, scales as$1/\omega$ in the higher frequency regime, and as $g_0^{\alpha} \omega^{\beta}$with exponents $\alpha = 1$ and $\beta = 1.25$ in the lower frequency regime.The values of exponents $\alpha$ and $\beta$ are similar to the exponentsobtained in the earlier Monte Carlo simulation studies of DNA chains and aLangevin dynamics simulation study of longer DNA chains.

Study of unzipping transitions in an adsorbed polymer by a periodic force