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Translocation of polymers into crowded media with dynamic attractive nanoparticles

Translocation of polymers into crowded media with dynamic attractive nanoparticles

Physical Review. E Statistical Nonlinear and Soft Matter Physics 92(1): 012603

The translocation of polymers through a small pore into crowded media with dynamic attractive nanoparticles is simulated. Results show that the nanoparticles at the trans side can affect the translocation by influencing the free-energy landscape and the diffusion of polymers. Thus the translocation time τ is dependent on the polymer-nanoparticle attraction strength ɛ and the mobility of nanoparticles V. We observe a power-law relation of τ with V, but the exponent is dependent on ɛ and nanoparticle concentration. In addition, we find that the effect of attractive dynamic nanoparticles on the dynamics of polymers is dependent on the time scale. At a short time scale, subnormal diffusion is observed at strong attraction and the diffusion is slowed down by the dynamic nanoparticles. However, the diffusion of polymers is normal at a long time scale and the diffusion constant increases with the increase in V.

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Accession: 059160775

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PMID: 26274196

DOI: 10.1103/physreve.92.012603

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