Stretching a Semiflexible Polymer in a Tube
AbstractHow the statistical behavior of semiflexible polymer chains may be affected by force stretching and tube confinement is a classical unsolved problem in polymer physics. Based on the Odijk deflection theory and normal mode decomposition in terms of Fourier expansion, we have derived a new compact formula for the extension of a wormlike chain of finite length strongly confined in a tube and simultaneously stretched by an external force. We have also suggested a new deflection length, which together with the force-extension relation is valid for a very extended range of the tube-diameter/persistence-length ratio comparing to the classic Odijk theory. The newly derived formula has no adjustable fitting parameters for the whole deflection regime; in contrast, the classic Odijk length needs different prefactors to fit the free energy and average extension, respectively. Brownian dynamics simulations based on the Generalized Bead-Rod (GBR) model were extensively performed, which justified the theoretical predictions. View Full-Text
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Li, R.; Wang, J. Stretching a Semiflexible Polymer in a Tube. Polymers 2016, 8, 328.
Li R, Wang J. Stretching a Semiflexible Polymer in a Tube. Polymers. 2016; 8(9):328.Chicago/Turabian Style
Li, Runhua; Wang, Jizeng. 2016. "Stretching a Semiflexible Polymer in a Tube." Polymers 8, no. 9: 328.
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