title: Diffusive dynamics of polymer chains in an array of nanoposts.
abstract: We present a dynamic density functional approach to study polymer chain diffusion in a good solvent in the confinement of a nanopost array. Three key results emerge from our study. First, we show different scaling laws of the chains moving toward, close to, and around the posts. Second, in the flux process of polymer chains, the head, side, and middle segments display different scaling laws. As the chains come in contact with the posts, an enlarged motion discrepancy emerges between the head and middle segments perpendicular to the posts. For instance, the motion of head segments transforms from Zimm to reputation type, whereas the middle segments almost retain the Zimm motion. Third, as the spacing crack between two posts narrows down, a climbing effect along the posts can be clearly observed in the polymer motion.
authors.affiliation: State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China. tianm@mail.buct.edu.cn mijg@mail.buct.edu.cn and Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials, Beijing University of Chemical Technology, Beijing, China.
authors.forename: Yi
authors.initials: Y
authors.lastname: Ye
authors.affiliation: Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials, Beijing University of Chemical Technology, Beijing, China.
authors.forename: Zhongjie
authors.initials: Z
authors.lastname: Du
authors.affiliation: State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China. tianm@mail.buct.edu.cn mijg@mail.buct.edu.cn and Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials, Beijing University of Chemical Technology, Beijing, China.
authors.forename: Ming
authors.initials: M
authors.lastname: Tian
authors.affiliation: State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China. tianm@mail.buct.edu.cn mijg@mail.buct.edu.cn and Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials, Beijing University of Chemical Technology, Beijing, China.
authors.forename: Liqun
authors.initials: L
authors.lastname: Zhang
authors.affiliation: State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China. tianm@mail.buct.edu.cn mijg@mail.buct.edu.cn.
authors.forename: Jianguo
authors.initials: J
authors.lastname: Mi