Journal article

Coordination-Driven Multistep Assembly of Metal-Polyphenol Films and Capsules

Md Arifur Rahim, Hirotaka Ejima, Kwun Lun Cho, Kristian Kempe, Markus Muellner, James P Best, Frank Caruso



We report the assembly of metal-polyphenol complex (MPC) films and capsules through the sequential deposition of iron(III) ions (Fe(III)) and a natural polyphenol, tannic acid (TA), driven by metal-ligand coordination. Stable Fe(III)/TA films and capsules were formed, indicating lateral and longitudinal cross-linking of TA by Fe(III) in the film structure. Quartz crystal microbalance, ultraviolet-visible (UV-vis) spectrophotometry, and X-ray photoelectron spectroscopy were carried out to quantitatively analyze the film growth. A comparison of the MPC capsules prepared through multistep assembly with those obtained through one-step deposition, as reported previously [Ejima et al., Science 201..

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University of Melbourne Researchers


Awarded by Australian Research Council under the Australian Laureate Fellowship scheme

Funding Acknowledgements

This research was supported by the Australian Research Council under the Australian Laureate Fellowship (FL120100030, F.C.) scheme. H.E. thanks the Japan Society for the Promotion of Science (JSPS) for a postdoctoral fellowship. K.K. is grateful to the Alexander von Humboldt-foundation for a Feodor-Lynen fellowship. M.M. thanks the University of Melbourne for a McKenzie postdoctoral fellowship. J.P.B. would like to acknowledge funding from the EMPA Postdoc program cofunded by FP7:Marie Curie Actions. K.L.C thanks the Science and Industry Endowment Fund and CSIRO for a John Stocker Postdoctoral Fellowship.