Oxidant-dependent antioxidant activity of polydopamine films: The chemistry-morphology interplay

en

614

126134

2021-01-07

0927-7757

Colloids and Surfaces A: Physicochemical and Engineering Aspects

Polydopamine (PDA) films allow to functionalize almost all materials with a conformal and chemically active coating. These coatings can react with reducible metallic cations and with all kinds of molecules carrying nucleophilic groups. Recently, our Show morePolydopamine (PDA) films allow to functionalize almost all materials with a conformal and chemically active coating. These coatings can react with reducible metallic cations and with all kinds of molecules carrying nucleophilic groups. Recently, our team extended PDA chemistry to a vast repertoire of oxidants and to acidic conditions. However, the influence of changes in the method of PDA deposition on the properties of the obtained coatings, in particular the antioxidant properties, have not been sufficiently explored. It is anticipated that the antioxidant properties should depend on the film preparation method. A combination of experimental techniques, atomic force microscopy, cyclic voltammetry and X ray photoelectron spectroscopy are used to relate the antioxidant properties of PDA films to their structural features and to their chemical composition. It is demonstrated that the antioxidant properties of PDA films are not only dependent on the type of the employed oxidant – which can be expected to affect a variable density of oxidizable groups on the surface of PDA - but also on the oxidant film morphology and roughness. Show less

Colloids and Surfaces A: Physicochemical and Engineering Aspects

article

ACL

ANR-10-LABX-0026 CSC
ANR-10-120 IDEX-0002-02

Chimie/Matériaux

Department of Chemical Sciences, University of Naples Federico II, Via Cintia 4, I-80126 Naples, Italy

aut

International

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