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Comparative Analysis of Tethered and Untethered Polymers Close to a Surface Investigated by Monte Carlo Techniques

机译:蒙特卡洛技术研究表面附近的拴系和非拴系聚合物的比较分析

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Modification of inorganic particles with organic polymer layers leads to well defined hybrid nanoparticles with tunable properties. Studies of such systems rely on the investigation of polymers near to or attached at a surface. In the present investigation, size, shape, and orientation are investigated as functions of the distance of the center of gravity of linear and star-branched polymers from the surface by use of Monte Carlo methods for neutral and attractive surfaces in good and moderate solvents. To quantify the strength of interaction, a parameter "excluded distance" is introduced. It vanishes if repulsive interaction due to the excluded volume effect and attractive ones compensate, which is roughly the case for surface-polymer interactions similar to polymer-polymer interactions in theta solvents.
机译:用有机聚合物层对无机颗粒的改性导致定义明确的具有可调特性的杂化纳米颗粒。对此类系统的研究依赖于对靠近或附着在表面的聚合物的研究。在本研究中,通过使用蒙特卡罗方法在良好和中度溶剂中形成中性和有吸引力的表面,研究了尺寸,形状和取向作为线性和星形支化聚合物重心与表面距离的函数。为了量化交互的强度,引入了参数“排除的距离”。如果由于排除的体积效应而产生排斥作用,而有吸引力的相互作用抵消,则排斥作用消失,这与在θ溶剂中的聚合物-聚合物相互作用相似,与表面-聚合物相互作用大致相同。

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