Crystallization of bioinspired citrate-functionalized nanoapatite with tailored carbonate content

Acta Biomaterialia
José Manuel Delgado-LópezJaime Gómez-Morales

Abstract

Novel citrate-functionalized carbonate-apatite nanoparticles with mean lengths ranging from 20 to 100 nm were synthesized by a thermal-decomplexing batch method. Needle-like and plate-shaped morphologies were obtained in the absence and presence of sodium carbonate in the precipitation medium, respectively. The precipitation time and the presence of sodium carbonate strongly affect the chemical composition as well as the dimensions and the crystallinity of nanoparticles. At a short precipitation time, poorly crystalline apatites of 100 nm mean length with a low degree of carbonation (1.5% w/w, mainly in B-position) and a high citrate content (5.9% w/w) were precipitated. This citrate content is close to that recently measured in bone apatite. When increasing the precipitation time up to 96 h the mean length and the citrate content progressively decrease and at the same time the nanoparticles become more crystalline. They are composed of a well-ordered carbonate-substituted apatitic core embedded in a non-apatitic hydrated layer containing citrate ions. This layer progressively transforms into a more stable apatite domain upon maturation in aqueous media. The nanoparticles displayed excellent compatibility properties in cell bio...Continue Reading

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Citations

Nov 22, 2013·Journal of Materials Science. Materials in Medicine·Christina G WeberChristophe Drouet
Mar 19, 2014·Journal of Biomedical Materials Research. Part a·Monica MontesiAnna Tampieri
May 8, 2013·Journal of Inorganic Biochemistry·José Manuel Delgado-LópezJaime Gómez-Morales
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Nov 9, 2019·Nanomaterials·Francesca OltolinaAntonia Follenzi
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Jan 26, 2020·Nanomaterials·Ylenia JabaleraJaime Gómez-Morales
Jun 4, 2020·Nanomaterials·Gloria B Ramírez-RodríguezJosé M Delgado-López
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