DYNAMIC NANOFISHING OF A SINGLE POLYMER CHAIN
Static nanofishing realized by atomic force microscope (AFM) on a single polymer chain, where it is picked up and pulled at its chemically modified terminals, gives structural information such as persistence length by comparing the experimentally obtained force-extension curve with theo-retical models. The recent result showed that no energy dissipation during successive extension and contraction processes for a single polystyrene (PS) chain as shown in Fig. 1. As such, static nanofishing is a very powerful tool, while this technique never catches any information about viscosity. On the other hand, dynamic nanofishing, where a cantilever is imposed on the forced oscillation at its resonant frequency, enables us to investigate more fruitful information. The double Voigt model, as phenome-nological model, was employed to analyze the result. The method gave extension-dependent changes of entropic elasticity and frictional coefficient with solvent molecules.
KenNAKAJIMA Toshio NISHI
WPI-AIMR, Tohoku University, JAPAN
国际会议
PP’2010，Jinan International Symposium on Polymer Physics(2010济南国际高分子物理学术研讨会)
济南
英文
57-58
2010-06-06（万方平台首次上网日期，不代表论文的发表时间）