title: One-step assembly of coordination complexes for versatile film and particle engineering.
abstract: 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.
authors.affiliation: Department of Chemical and Biomolecular Engineering, The University of Melbourne, Parkville, Victoria 3010, Australia.
authors.forename: Hirotaka
authors.initials: H
authors.lastname: Ejima
authors.forename: Joseph J
authors.initials: JJ
authors.lastname: Richardson
authors.forename: Kang
authors.initials: K
authors.lastname: Liang
authors.forename: James P
authors.initials: JP
authors.lastname: Best
authors.forename: Martin P
authors.initials: MP
authors.lastname: van Koeverden
authors.forename: Georgina K
authors.initials: GK
authors.lastname: Such
authors.forename: Jiwei
authors.initials: J
authors.lastname: Cui
authors.forename: Frank
authors.initials: F
authors.lastname: Caruso
mesh_terms: D002214:Capsules / Q000737:chemistry / Q000633:toxicity; D002616:Chemical Engineering / Q000379:methods*; D056831:Coordination Complexes / Q000138:chemical synthesis* / Q000633:toxicity; D005290:Ferric Compounds / Q000737:chemistry / Q000633:toxicity; D006863:Hydrogen-Ion Concentration; D059808:Polyphenols / Q000737:chemistry* / Q000633:toxicity; D013499:Surface Properties; D013634:Tannins / Q000737:chemistry* / Q000633:toxicity
chemical_list: D002214:Capsules; D056831:Coordination Complexes; D005290:Ferric Compounds; D059808:Polyphenols; D013634:Tannins