摘要翻译:
我们研究了一个长度为n$的转移聚合物在三维中的通过时间,当它在一个狭窄的孔中被一个恒定的力$f$施加在聚合物的一端时。在小到中等作用力下,满足条件$fn^{\nu}/k_bt\lessim1$,其中$\nu约为聚合物的Flory指数0.588$,我们发现聚合物离开孔隙的平均时间$\tau_n$标度为$n^{2+\nu}$与$f$无关,这与我们先前对f=0的结果一致。在强作用力下,即对于$fn^{\nu}/k_bt\gg1$,通过时间的行为跨越到$\tau_n\sim n^2/f$。我们在这里表明,这些行为源于孔隙附近的聚合物动力学--特别是在整个孔隙中聚合物链张力不平衡中的记忆效应。
---
英文标题:
《Passage Times for Polymer Translocation Pulled through a Narrow Pore》
---
作者:
Debabrata Panja and Gerard T. Barkema
---
最新提交年份:
2007
---
分类信息:
一级分类:Physics 物理学
二级分类:Soft Condensed Matter 软凝聚态物质
分类描述:Membranes, polymers, liquid crystals, glasses, colloids, granular matter
膜,聚合物,液晶,玻璃,胶体,颗粒物质
--
一级分类:Physics 物理学
二级分类:Statistical Mechanics 统计力学
分类描述:Phase transitions, thermodynamics, field theory, non-equilibrium phenomena, renormalization group and scaling, integrable models, turbulence
相变,热力学,场论,非平衡现象,重整化群和标度,可积模型,湍流
--
一级分类:Physics 物理学
二级分类:Biological Physics 生物物理学
分类描述:Molecular biophysics, cellular biophysics, neurological biophysics, membrane biophysics, single-molecule biophysics, ecological biophysics, quantum phenomena in biological systems (quantum biophysics), theoretical biophysics, molecular dynamics/modeling and simulation, game theory, biomechanics, bioinformatics, microorganisms, virology, evolution, biophysical methods.
分子生物物理、细胞生物物理、神经生物物理、膜生物物理、单分子生物物理、生态生物物理、生物系统中的量子现象(量子生物物理)、理论生物物理、分子动力学/建模与模拟、博弈论、生物力学、生物信息学、微生物、病毒学、进化论、生物物理方法。
--
一级分类:Quantitative Biology 数量生物学
二级分类:Biomolecules 生物分子
分类描述:DNA, RNA, proteins, lipids, etc.; molecular structures and folding kinetics; molecular interactions; single-molecule manipulation.
DNA、RNA、蛋白质、脂类等;分子结构与折叠动力学;分子相互作用;单分子操作。
--
---
英文摘要:
We study the passage times of a translocating polymer of length $N$ in three dimensions, while it is pulled through a narrow pore with a constant force $F$ applied to one end of the polymer. At small to moderate forces, satisfying the condition $FN^{\nu}/k_BT\lesssim1$, where $\nu\approx0.588$ is the Flory exponent for the polymer, we find that $\tau_N$, the mean time the polymer takes to leave the pore, scales as $N^{2+\nu}$ independent of $F$, in agreement with our earlier result for F=0. At strong forces, i.e., for $FN^{\nu}/k_BT\gg1$, the behaviour of the passage time crosses over to $\tau_N\sim N^2/F$. We show here that these behaviours stem from the polymer dynamics at the immediate vicinity of the pore -- in particular, the memory effects in the polymer chain tension imbalance across the pore.
---
PDF链接:
https://arxiv.org/pdf/706.3969