Translocation Of A Polymer Chain Through A Nanopore And Assembly Of SWCNs By A Polymer Chain Inducing: A Molecular Dynamics Study

The article has two segments. Firstly, translocation of a branchedpolymer chain through a pore is investigated by Langvein dynamicsmethod. In this paper, we can determine the position of branched pointsby investigating the time when the monomers just enter into the orifice. Itis found that, for the given external force, the average translocation timeτsatisfies the scaling relation:τ~Nα, and the scaling exponentαincreases with the external force F. The monomer number ofbranched-chain n also affects the average translocation time, and thescaling exponentαdecreases withn. This investigation can help usunderstand the translocation of biomacromolecules. Secondly, twosingle-wall carbon nanotudes (SWCNs) is induced by a polymer chainto self-assembly. The LAMMPS package is used to study thisphenomenon. In this paper, we can know the whole self-assembly process by different time steps of the stimulation. It is found that, the bigger thestiffness coefficient of the polymer is, the smaller the angle between thetwo SWCNs is. And when Kaa=350kBT, the polymer chain issemiflexible, its conformation is helix on the surface of the SWCNs. Thisinvestigation can help us understand the interaction of the polymer chainand the SWCNs. All these two investigations can provide some theoryreasons for the application of the polymers.