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Authors
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Werner, M. ; Bathmann, J. ; Baulin, V. A. ; Sommer, J.-U.
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Title
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Thermal tunneling of homopolymers through amphiphilic membranes
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Date
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24.02.2017
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Number
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51721
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Abstract
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We propose a theory to predict the passive translocation of flexible polymers through amphiphilic membranes. By using a generic model for the potential felt by a monomer across the membrane we calculate the free energy profile for homopolymers as a function of their hydrophobicity. Our model explains the translocation window and the translocation rates as a function of chain hydrophobicity in quantitative agreement with simulation results. The potential model leads to a new adsorption transition where chains switch from a one-sided bound adsorbed state into a bridging state through the membrane core by increasing the hydrophobicity beyond a critical value. We demonstrate that the hydrophobicity leading to the fastest translocation coincides with the solution for the critical point of adsorption in the limit of long chains.
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Publisher
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ACS Macro Letters
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Wikidata
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Citation
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ACS Macro Letters 6 (2017) 247-251
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DOI
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https://doi.org/10.1021/acsmacrolett.6b00980
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Tags
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