Loebl H C, Randel R, Goodwin S P, Matthai C C
Department of Physics and Astronomy, University of Wales, Cardiff, United Kingdom.
Phys Rev E Stat Nonlin Soft Matter Phys. 2003 Apr;67(4 Pt 1):041913. doi: 10.1103/PhysRevE.67.041913. Epub 2003 Apr 29.
Monte Carlo simulation studies of the translocation of homopolymers of length N driven through a channel have been performed. We find that the translocation time tau depends on temperature in a nontrivial way. For temperatures below some critical temperature theta(c), tau approximately T-1.4, whereas for T>theta(c), tau increases with temperature. The low temperature results are in good agreement with experimental findings as is the dependence of tau on the driving field strength. The velocity of translocation displays the same characteristics as found in experiment but the N dependence of tau shows the linear relationship observed in experiment only for large values of N. A possible reason for this is suggested.
已对长度为N的均聚物通过通道的转位进行了蒙特卡罗模拟研究。我们发现转位时间τ以一种非平凡的方式依赖于温度。对于低于某个临界温度θ(c)的温度，τ近似为T^(-1.4)，而对于T > θ(c)，τ随温度升高。低温结果与实验发现以及τ对驱动场强的依赖性都很好地吻合。转位速度表现出与实验中发现的相同特征，但τ对N的依赖性仅在N值较大时才呈现出实验中观察到的线性关系。对此提出了一个可能的原因。
