Fast preparation of nano-hydroxyapatite/superhydrophilic reduced graphene oxide composites for bioactive applications
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Data
2013-01-01
Autores
Zanin, Hudson
Saito, Eduardo
Marciano, Fernanda Roberta
Ceragioli, Helder Jose
Campos Granato, Alessandro Eustaquio [UNIFESP]
Porcionatto, Marimelia [UNIFESP]
Lobo, Anderson Oliveira
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A method for the direct electrodeposition of globular nano-hydroxyapatite (nHAp) onto reduced graphene oxide (RGO) is presented and a model for the specific growth preference is discussed. Results show that the carboxyl (carboxylic acid)/carboxylate functional groups attached directly to the RGO after oxygen plasma treatment were essential to accelerate the OH- formation and the deposition of globular nHAp crystals. High resolution scanning electron microscopy, energy dispersive X-ray and X-ray diffraction showed that homogeneous, highly crystalline, stoichiometric nHAp crystals, with preferential growth in the (002) plane direction, were formed without any thermal treatment. the nHAp/RGO composites were shown to be an appropriate surface for mesenchymal stem cell adhesion with active formation of membrane projections.
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Journal of Materials Chemistry B. Cambridge: Royal Soc Chemistry, v. 1, n. 38, p. 4947-4955, 2013.