Translocation of polymers into crowded media with dynamic attractive nanoparticles.
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.
Department of Physics, Zhejiang University, Hangzhou 310027, China.|Department of Physics, Lishui University, Lishui 323000, China.
Wei-Ping
WP
Cao
Department of Physics, Lishui University, Lishui 323000, China.
Qing-Bao
QB
Ren
Department of Physics, Zhejiang University, Hangzhou 310027, China.|Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China.
Meng-Bo
MB
Luo
D056004:Molecular Dynamics Simulation; D053758:Nanoparticles / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry*; D016062:Porosity; D011336:Probability; D013997:Time Factors
D011108:Polymers