Preparation, characterization and application of modified surfaces with 3,5-Bis (3,5-dinitrobenzoyl-amino) benzoic acid

JULIETA I. PAEZ; ARIEL L. CAPPELLETTI; ANA M. BARUZZI; VERÓNICA BRUNETTI; MIRIAM C. STRUMIA

MACROMOLECULAR SYMPOSIA

WISLEY

Lugar: New York; Año: 2010 vol. 290 p. 37 - 45

1022-1360

The spontaneous adsorption of the dendron 3,5-Bis (3,5-dinitrobenzoylamino)benzoic acid (D-NO2) onto gold and carbon electrodes produced conductivesurfaces with electroactive chemical functions. A comparative electrochemicalbehavior of both electrodes after dendron immobilization led us to conclude thatthe self-assembly of D-NO2 on carbon is faster and stronger. Considering thisadvantage, the surface of magnetic maghemite nanoparticles (MNPs) was modifiedusing D-NO2. Firstly, MNPs were modified with APS as silane coupling agent andafterwards, D-NO2 was covalently attached to the surface, achieving nitro-functionalizedMNPs. Subsequently, the immobilization of these modified MNPs onto glassycarbon surfaces was explored to generate a novel platform promising for biosensorsdevelopment.