Effect of Local Chain Conformation in Adsorbed Nanolayers on Confined Polymer Molecular Mobility
Effect of Local Chain Conformation in Adsorbed Nanolayers on Confined Polymer Molecular Mobility
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吸附纳米层中的局部链构象对受限聚合物分子迁移率的影响
DOI：
10.1103/physrevlett.122.217801
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发表时间：
2019
影响因子：
8.6
通讯作者：
Priestley Rodney D
中科院分区：
文献类型：
--
作者：
Zuo Biao;Zhou Hao;Davis Mary J B;Wang Xinping;Priestley Rodney D
界面起着重要的作用，在修改动力学的聚合物局限于纳米尺度。我们证明，通过控制构象链，即，不可逆吸附纳米层中的环的高度。这些效应分别来自吸附和相邻未吸附链之间的拓扑相互作用，这增加了它们的运动耦合，以促进起源于界面的抑制动力学的传播，从而突出了通过吸附纳米层中链的局部构象来操纵界面效应的能力。
Interfaces play an important role in modifying the dynamics of polymers confined to the nanoscale. We demonstrate that the distance over which an interface suppresses molecular mobility in poly(styrene) thin films can be systematically increased by tens of nanometers by controlling the chain of conformation, i.e., the height of the loops in irreversibly adsorbed nanolayers. These effects arise from topological interaction between adsorbed and neighboring unadsorbed chains, respectively, which increase their motional coupling to facilitate the propagation of suppressed dynamics originating at the interface, thus highlighting the ability to manipulate interfacial effects by local conformation of chains in adsorbed nanolayers.