Electrodeposition of Hydroxyapatite Nanoparticles Onto Ultra-Fine TiO2 Nanotube Layer by Electrochemical Reaction in Mixed Electrolyte
Electrochemical depositions of HAp nanoparticles onto Ultra-fine TiO2 nanotube layer were carried out by the electrochemical reaction in mixed electrolyte of 1.6 M (NH4)H2PO4+0.8 M NH4F containing 0.15 and 0.25 wt% HAp. The Ca/P ratios of the HAp nanoparticles were evaluated by EDS analysis and their values were 1.53 and 1.66 respectively. The distribution quantity of Ca and P were remained at the middle region of TiO2 nanotube, but the Ti element was mainly stayed at the bottom of barrier layer from the result of line scanning diagram. Especially, adsorbed phosphate ions facilitated nucleation of nanophase calcium phosphate material inside the TiO2 nanotubu layer that resulted in vertical growth of HAp nanoparticles. These surfaces and structures were all effective for biocompatibility from the SBF tests.
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Document Type: Research Article
Publication date: 01 August 2011
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