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

2022/07/22 by Ramu Kumar Yadav, Yadav, Ramu Kumar
Chemistry · Engineering · Physics and Astronomy · #Electrostatics and Colloid Interactions #FOS: Physical sciences #Force Microscopy Techniques and Applications #Nanopore and Nanochannel Transport Studies #Soft Condensed Matter (cond-mat.soft)

paper · pdf · doi:10.48550/arxiv.2207.11140

openalex publication_date 2022/07/22 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

Using Monte Carlo simulations, we study the dynamic transitions in the unzipping of an adsorbed homogeneous polymer on a surface (or wall). We consider three different types of surfaces. One end of the polymer is always kept anchored, and other end monomer is subjected to a periodic force with frequency ω and amplitude g₀. We observe that the force-distance isotherms show hysteresis loops in all the three cases. For all the three cases, it is found that the area of the hysteresis loop, A_loop, scales as 1/ω in the higher frequency regime, and as g₀^α ω^β with exponents α= 1 and β= 1.25 in the lower frequency regime. The values of exponents α and β are similar to the exponents obtained in the earlier Monte Carlo simulation studies of DNA chains and a Langevin dynamics simulation study of longer DNA chains.

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