We report a simple and facile protocol to fabricate mussel-inspired polydopamine (PDA) gradients on different surfaces. An oxygen diffusion phenomenon was used for dopamine autoxidation to form thickness gradients of PDA on different substrates. These PDA gradients showed gradual changes in thickness, roughness, wettability and light transmittance.
H. Yang, Q. Wu, L. Wan and Z. Xu, Chem. Commun., 2013, 49, 10522 DOI: 10.1039/C3CC46127K
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