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the role of diazonium interface chemistry in the design of high performance polypyrrole coated flexible ITO sensing electrode

Benzene sulfonic acid-doped polypyrrole (PPyBSA) films were electrochemically prepared on aminobenzenediazonium-modified flexible ITO in aqueous media in a simple and efficient way. Diazonium electroreduction resulted in aminophenyl-modified ITO (ITO-NH2), which served as a platform for the electrodeposition of a PPyBSA layer. Without diazonium pretreatment, the PPyBSA coating delaminates readily upon sonication or during ultrahigh vacuum outgassing prior to XPS analysis. In contrast, a pretreatment involving electrografting for 45s at ?800mV resulted in excellent adhesion of PPyBSA, which withstood 75min of ultrasonication. The robust ITO-NH2-PPy electrode was employed for the fast, simple and accurate detection of lead (II) by differential pulse voltammetry…

Auteur(s) : M. Lo, a.K.DDiaw, D.G. Sall, J.J. Aron, M. A. Oturan, M. M. Chehimi
Pages : 14–18
Année de publication : 2017
Revue : Electrochemistry Communications
N° de volume : 77
Type : Article
Statut Editorial : Elsevier Science
Mise en ligne par : DIAW Abdou Karim Diagne