Melanin-containing films: growth from dopamine solutions versus layer-by-layer deposition.
Fiche publication
Date publication
octobre 2010
Auteurs
Membres identifiés du Cancéropôle Est :
Dr VOEGEL Jean-Claude
Tous les auteurs :
Bernsmann F, Ersen O, Voegel JC, Jan E, Kotov NA, Ball V
Lien Pubmed
Résumé
Films formed by oxidation of dopamine are of interest for functionalisation of solid-liquid interfaces owing to their versatility. However, the ability to modulate the properties of such films, for example, permeability to ionic species and the absorption coefficient, is urgently needed. Indeed, melanin films produced by oxidation of dopamine absorb strongly over the whole UV/Vis part of the electromagnetic spectrum and are impermeable to anions even for a film thickness as low as a few nanometers. Herein we combine oxidation of dopamine to produce a solution containing dopamine-melanin particles and their alternating deposition with poly(diallyldimethylammonium chloride) to produce films which have nearly the same morphology as pure dopamine-melanin films but are less compact, more transparent and more permeable to ferrocyanide anions.
Référence
Chemphyschem. 2010 Oct 25;11(15):3299-305.