We report controllable assembly of polystyrene (PS) microspheres via a photocatalytically driven electroosmotic flow deriving from UV irradiation of Ag₃PO₄ nanoparticles in water. A series of assembly phases, including crystallites, chains and gels, are programmed by systematically modulating the UV intensity, the packing density of the PS microspheres and the concentration of the Ag₃PO₄ nanoparticles. Our findings demonstrate an important ability of light-responsive nanoparticles for colloidal assembly, which offers a new pathway toward effective manipulation of assembly at the microscale.

中文翻译：

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由光响应 Ag3PO4 纳米粒子操纵的胶体组装

我们报告了聚苯乙烯 (PS) 微球的可控组装，通过光催化驱动的电渗流，该流源自水中的 Ag ₃ PO ₄纳米粒子的紫外线照射。一系列组装阶段，包括微晶、链和凝胶，通过系统地调节紫外线强度、PS 微球的堆积密度和 Ag ₃ PO ₄纳米颗粒的浓度来编程。我们的研究结果证明了光响应纳米粒子在胶体组装方面的重要能力，这为在微观尺度上有效操纵组装提供了一条新途径。