Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Polymer Physics and Chemistry, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China.
School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China.
Adv Mater. 2018 Feb;30(6). doi: 10.1002/adma.201704131. Epub 2018 Jan 5.
Assembling nanoparticles (NPs) on various surfaces are intensively investigated for the construction of functional nanocoatings; however, it is still a challenge to fabricate conformal nanocoatings uniformly on surfaces having micro- or nanostructures. Herein, it is demonstrated that the negatively charged SiO NPs and the positively charged silicon coupling agent can be assembled layer-by-layer on the microstructures based on the combination of electrostatic interaction and condensation reaction. Conformal nanocoatings with controllable thickness are formed on the microstructured surfaces with different compositions and morphologies. The formation mechanism is confirmed by using quartz crystal microbalance with dissipation (QCM-D) to study the assembly process in real time. The universality of this method is illustrated by using other reactive building blocks with opposite charge to build up the conformal nanocoatings. Application in the preparation of antireflective nanocoatings on nonplanar optical materials is demonstrated. This simple, versatile, and scalable strategy for the preparation of conformal nanocoatings is promising for practical applications.
在各种表面上组装纳米粒子 (NPs) 被广泛研究用于构建功能性纳米涂层；然而，在具有微纳结构的表面上均匀地制备保形纳米涂层仍然是一个挑战。本文展示了基于静电相互作用和缩合反应的结合，带负电荷的 SiO NPs 和带正电荷的硅偶联剂可以在微结构上逐层组装。具有不同组成和形貌的微结构表面上形成了具有可控厚度的保形纳米涂层。通过使用石英晶体微天平（QCM-D）实时研究组装过程来确认形成机理。通过使用具有相反电荷的其他反应性构建块来构建保形纳米涂层，说明了该方法的通用性。在非平面光学材料上制备抗反射纳米涂层的应用也得到了展示。这种用于制备保形纳米涂层的简单、通用且可扩展的策略具有广阔的应用前景。
