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arXiv 1606.01646cond-mat.soft
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磁性Janus粒子在液-液界面的可控毛细管组装

Controlled Capillary Assembly of Magnetic Janus Particles at Fluid-Fluid Interfaces

Qingguang Xie, Gary B. Davies, Jens Harting

摘要:

毛细相互作用可用于指导流体-流体界面处吸附的颗粒的组装。精确控制毛细相互作用的大小和方向以将颗粒组装成用于材料科学目的的有利结构是期望的但具有挑战性。在本文中,我们研究了吸附在流体-流体界面上的磁性Janus粒子之间的毛细管相互作用。我们开发了一个对相互作用模型,预测这些粒子应该安排成一个侧-侧配置,并进行模拟,证实了我们的模型的预测。最后,我们研究了单层结构,形成时,许多磁性Janus粒子吸附在界面上。我们发现,颗粒排列成长,直链表现出很小的曲率,与椭圆形颗粒之间的毛细管相互作用。我们还发现了一个制度,其中高度有序的,晶格状的单层结构的形式,它可以动态调整使用外部磁场。

英文摘要:

Capillary interactions can be used to direct assembly of particles adsorbed at fluid-fluid interfaces. Precisely controlling the magnitude and direction of capillary interactions to assemble particles into favoured structures for materials science purposes is desirable but challenging. In this paper, we investigate capillary interactions between magnetic Janus particles adsorbed at fluid-fluid interfaces. We develop a pair-interaction model that predicts that these particles should arrange into a side--side configuration, and carry out simulations that confirm the predictions of our model. Finally, we investigate the monolayer structures that form when many magnetic Janus particles adsorb at the interface. We find that the particles arrange into long, straight chains exhibiting little curvature, in contrast with capillary interactions between ellipsoidal particles. We further find a regime in which highly ordered, lattice-like monolayer structures form, which can be tuned dynamically using an external magnetic field.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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