Department of Chemical and Biomolecular Engineering, The University of Melbourne, Parkville, Victoria 3010, Australia.
Science. 2013 Jul 12;341(6142):154-7. doi: 10.1126/science.1237265.
The development of facile and versatile strategies for thin-film and particle engineering is of immense scientific interest. However, few methods can conformally coat substrates of different composition, size, shape, and structure. We report the one-step coating of various interfaces using coordination complexes of natural polyphenols and Fe(III) ions. Film formation is initiated by the adsorption of the polyphenol and directed by pH-dependent, multivalent coordination bonding. Aqueous deposition is performed on a range of planar as well as inorganic, organic, and biological particle templates, demonstrating an extremely rapid technique for producing structurally diverse, thin films and capsules that can disassemble. The ease, low cost, and scalability of the assembly process, combined with pH responsiveness and negligible cytotoxicity, makes these films potential candidates for biomedical and environmental applications.
开发简便、通用的薄膜和颗粒工程策略具有重要的科学意义。然而，很少有方法可以对不同成分、大小、形状和结构的基底进行共形涂覆。我们报告了使用天然多酚和 Fe(III)离子的配位化合物一步涂覆各种界面的方法。薄膜的形成是通过多酚的吸附引发的，并通过 pH 依赖性的多价配位键来指导。在一系列平面以及无机、有机和生物颗粒模板上进行了水相沉积，证明了这是一种生产具有不同结构的薄膜和胶囊的非常快速的技术，这些薄膜和胶囊可以进行拆卸。组装过程的简便、低成本和可扩展性，以及对 pH 的响应性和可忽略不计的细胞毒性，使得这些薄膜成为生物医学和环境应用的潜在候选材料。
