Catechol-based layer-by-layer assembly of composite coatings: A versatile platform to hierarchical nano-materials

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Inspired by the marine mussel’s ability to adhere to surfaces underwater, an aqueous catechol-based dip coating platform was developed. Using a catechol-functionalized polyacrylamide binder in combination with inorganic nanoparticles enables the facile fabrication of robust composite coatings and Bragg stacks. This modular assembly of well-defined building blocks provides a versatile alternative to electrostatic driven approaches with layer thickness and refractive indices being readily tunable.