Assessing Pair Interaction Potentials of Nanoparticles on Liquid Interfaces
Assessing Pair Interaction Potentials of Nanoparticles on Liquid Interfaces
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DOI：
10.1021/acsnano.8b08189
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发表时间：
2019-03-01
期刊：
影响因子：
17.1
通讯作者：
Russell, Thomas P.
中科院分区：
文献类型：
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作者：
Kim, Paul Y.;Gao, Yige;Russell, Thomas P.
通过扫描电子显微镜，利用离子液体的非挥发性，以稳定对显微镜真空的标本，在液体表面的聚合物接枝的二氧化硅纳米粒子（NP）的对相互作用电位。即使在近接触，个人，二维分散良好的纳米粒子解决。平均力的潜力，减少到对相互作用的潜力稀释NP，提取具有良好的准确性从径向分布函数，NP直径和接枝聚合物链长是不同的。虽然NP多分散性有些扩大了核心排斥，对潜在的硬球相互作用，使这些系统适合于模型研究的界面结合的纳米粒子。对于短（5 kDa）聚乙二醇配体，弱（
The pair interaction potentials of polymer-grafted silica nanoparticles (NPs) at liquid surfaces were determined by scanning electron microscopy, exploiting the nonvolatility of ionic liquids to stabilize the specimens against microscope vacuum. Even at near contact, individual, two-dimensionally well-dispersed NPs were resolved. The potential of mean force, reduced to the pair interaction potential for dilute NPs, was extracted with good accuracy from the radial distribution function, as both NP diameter and grafted polymer chain length were varied. While NP polydispersity somewhat broadened the core repulsion, the pair potential well-approximated a hard sphere interaction, making these systems suitable for model studies of interfacially bound NPs. For short (5 kDa) poly(ethylene glycol) ligands, a weak (