Article ID Journal Published Year Pages File Type
593308 Colloids and Surfaces A: Physicochemical and Engineering Aspects 2013 6 Pages PDF
Abstract

•Covalent surface modification of silica particles.•Nanoparticles.•pH sensitive polymer.•Diazonium salt chemistry.•Colloid and surface science and technology.

We demonstrate that the reaction of diazonium salts with silica particles in basic media can provide reactive surface functionalities which are able: (i) to initiate the growth of polymers and (ii) to immobilize iron oxide nanoparticles at the surface of silica particles. Using this strategy, we synthesized hybrid >silica core@poly(acrylic acid) shell particles and magnetic hybrid materials composed of silica cores surrounded by a dense covalent attachment of magnetic iron oxide nanoparticles and polyethyleneglycol chains. Advantages of this functionalization approach rely not only on the simplicity, rapidity and efficiency of the procedure but also on the formation of strong silica aryl surface bonds, highly suitable for a wide variety of potential applications in colloid and surface science and technology.

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Related Topics
Physical Sciences and Engineering Chemical Engineering Colloid and Surface Chemistry
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