Synthesis of Rough Colloidal SU-8 Rods and Bananas via Nanoprecipitation.
Synthesis of Rough Colloidal SU-8 Rods and Bananas via Nanoprecipitation.
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DOI：
10.1021/acs.langmuir.0c03361
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发表时间：
2021-02
期刊：
影响因子：
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通讯作者：
Carla Fernández-Rico;J. Urbach;R. Dullens
中科院分区：
文献类型：
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作者：
Carla Fernández-Rico;J. Urbach;R. Dullens
表面粗糙度在确定胶体系统中的机械性能，润湿性和自组装方面起着重要作用。在这项工作中，我们开发了一种简单而快速的方法，可以通过在水中的Su-8的纳米沉淀产生粗糙的胶体Su-8杆，香蕉和球体。在此过程中，Su-8纳米球被吸收到胶体Su-8颗粒的表面上，然后使用UV-Light交联。球形覆盖率和浅色密度的大小受纳米沉淀反应过程中使用的su-8的浓度控制。粗糙的Su-8胶体颗粒的荧光标记允许其共聚焦成像，这表明它们在高包装部分处的稳定性。借助这些新开发的粗糙颗粒，我们提供了一个胶体模型系统，该系统允许研究解决表面粗糙度对由各向异性颗粒组成的材料的影响。
Surface roughness plays an important role in determining the mechanical properties, wettability, and self-assembly in colloidal systems. In this work, we develop a simple and fast method to produce rough colloidal SU-8 rods, bananas, and spheres, via the nanoprecipitation of SU-8 in water. During this process, SU-8 nanospheres are absorbed onto the surface of the colloidal SU-8 particles and then cross-linked using UV-light. The size of the spherical asperities and the asperity density are controlled by the concentration of SU-8 used during the nanoprecipitation reaction. Fluorescent labeling of the rough SU-8 colloidal particles allows for their confocal imaging, which demonstrates their stability at high packing fractions. With these newly developed rough particles, we provide a colloidal model system that allows for studies addressing the impact of surface roughness on materials composed of anisotropic particles.