Influence of polarization on the bioactivity of nanopowders of hydroxyapatite

Author

Pedrosa, A. ; Lanc, M.C. ; Borges, J.P. ; Neagu, E.R. ; Dias, Carlos J. ; Marat-Mendes, J.N.

Author_Institution

Dept. de Cienc. dos Mater., Univ. Nova de Lisboa, Caparica, Portugal

fYear

2011

fDate

28-31 Aug. 2011

Firstpage

55

Lastpage

56

Abstract

Polarization can accelerate the bioactivity of HAp immersed in an SBF solution. However a careful choice of polarization conditions has to be made. One relevant issue is to have long relaxation times of the polarization and this is related to the amount of water in Hap, which was to be kept as low as possible during poling. It was shown that the precipitation mechanism needs negative charges on the Hap surface. Under positive charge the mechanism is inhibited.

Keywords

bioceramics; biochemistry; bioelectric potentials; bone; calcium compounds; dielectric polarisation; molecular biophysics; nanomedicine; nanoparticles; precipitation; Ca₁₀PO₄OH; bioactivity; biocompatibility; biomaterial; dielectric polarization; dielectric property; hydroxyapatite immersion; nanopowder; poling; precipitation mechanism; relaxation time; simulated body fluid solution; surface negative charge; Heating; System-on-a-chip;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrets (ISE), 2011 14th International Symposium on

Conference_Location

Montpellier

ISSN

2153-3253

Print_ISBN

978-1-4577-1023-0

Type

conf

DOI

10.1109/ISE.2011.6084979

Filename

6084979