MOLECULAR DYNAMICS SIMULATION OF THE TRANSPORT OF CHARGED TUBE-LIKE NANOPARTICLES THROUGH A FLUIDIC CHANNEL

Liang Hao; Jia-ye Su; Hong-xia Guo

doi:10.3724/SP.J.1105.2013.13144

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MOLECULAR DYNAMICS SIMULATION OF THE TRANSPORT OF CHARGED TUBE-LIKE NANOPARTICLES THROUGH A FLUIDIC CHANNEL

Research Article | 更新时间：2021-03-19

- MOLECULAR DYNAMICS SIMULATION OF THE TRANSPORT OF CHARGED TUBE-LIKE NANOPARTICLES THROUGH A FLUIDIC CHANNEL
- Acta Polymerica Sinica Issue 12, Pages: 1561-1566(2013)
- 作者机构：
  
  中国科学院化学研究所高分子物理与化学国家重点实验室,北京,100190
- 作者简介：
- 基金信息：
- DOI：10.3724/SP.J.1105.2013.13144
  CLC：
- Published：20 December 2013，
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Liang Hao, Jia-ye Su, Hong-xia Guo. MOLECULAR DYNAMICS SIMULATION OF THE TRANSPORT OF CHARGED TUBE-LIKE NANOPARTICLES THROUGH A FLUIDIC CHANNEL. [J]. Acta Polymerica Sinica (12):1561-1566(2013)
DOI：

Liang Hao, Jia-ye Su, Hong-xia Guo. MOLECULAR DYNAMICS SIMULATION OF THE TRANSPORT OF CHARGED TUBE-LIKE NANOPARTICLES THROUGH A FLUIDIC CHANNEL. [J]. Acta Polymerica Sinica (12):1561-1566(2013) DOI： 10.3724/SP.J.1105.2013.13144.

摘要

采用分子动力学模拟方法研究了水溶液中管状带电纳米颗粒的跨膜输运过程.主要考察了纳米颗粒的尺寸、所带的电性以及外驱动电场的大小对输运动力学行为的影响.研究表明，随着外电场的增大，所有管状纳米颗粒的跨膜流量都迅速增大，其中有些颗粒呈现出非单调的变化，这与之前发现的球形纳米颗粒单调增加的趋势截然不同；而跨膜时间会随电场强度的增大而单调减小，并符合幂指数衰减的规律，这与郎之万动力学的理论预测一致.在同一电场强度下，管状颗粒的跨膜流量要比球形颗粒小几倍到一个数量级，而跨膜时间则大几倍.与球形颗粒相比，管状颗粒需要牺牲一定的旋转自由度才能进入通道，因此它们通常具有低的跨膜流量和长的跨膜时间.研究结果加深了人们对于不同形状纳米颗粒跨膜输运的理解，对高效纳米载体的设计具有一定的参考意义.

Abstract

Molecular dynamics simulation is used to study the transport of charged tube-like nanoparticles (NPs) through a fluidic channel.Herein

the effect of NP size

charge nature and external electric field (E) on the transport dynamics is considered.With the increase of E

the NP flux increases remarkably

where some of them exhibit nonmonotonous variations that are different from the flux behaviors of spherical NPs.The translocation time yields to a power law decrease with E

which is in agreement with the prediction of Langevin dynamics.Under a given E

the flux of tube-like NPs is several times and even an order smaller than that of spherical NPs

and inversely the translocation time is several times larger.Compared to spherical NPs

the tube-like NPs should always sacrifice some rotational freedom to enter the channel

thus they have smaller flux and longer translocation time.These results enrich the understanding of the NP shape effect

which has implications in the design of high efficient nanocarriers.

关键词

纳米颗粒水输运膜分子动力学

Keywords

NanoparticleWaterTransportChannelMolecular dynamics

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School of Materials Science and Engineering, East China University of Science and Technology

Shanghai Key Laboratory of Advanced Polymeric Materials, School of Materials Science and Engineering, East China University of Science and Technology

School of Materials Science and Engineering, South China University of Technology

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State Key Laboratory of Polymer Physics and Chemistry, Institute of Chemistry, Chinese Academy of Sciences

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