http://www.cnr.it/ontology/cnr/individuo/prodotto/ID168272

In situ time-resolved X-ray diffraction study of evolution of nanohydroxyapatite particles in physiological solution (Articolo in rivista)

Type

Label

In situ time-resolved X-ray diffraction study of evolution of nanohydroxyapatite particles in physiological solution (Articolo in rivista) (literal)

Anno

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Alternative label

Rau J.V., Generosi A., Ferro D., Minozzi F., Paci B., Rossi Albertini V., Dolci G., Barinov S.M. (2009)
In situ time-resolved X-ray diffraction study of evolution of nanohydroxyapatite particles in physiological solution
in MATERIALS SCIENCE & ENGINEERING C-MATERIALS FOR BIOLOGICAL APPLICATIONS
(literal)

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Rau J.V., Generosi A., Ferro D., Minozzi F., Paci B., Rossi Albertini V., Dolci G., Barinov S.M. (literal)

Pagina inizio

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Rivista

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Note

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Istituto di Struttura della Materia, CNR, Via del Fosso del Cavaliere, 100-00133 Rome, Italy; Istituto per lo Studio dei Materiali Nanostrutturati, CNR, c/o Dipartimento di Chimica, Sapienza Università di Roma, Piazzale Aldo Moro, 5-00185 Rome, Italy; Sapienza Universitá di Roma, Dipartimento di Scienze Odontostomatologiche, Viale Regina Elena, 287/a-00161 Rome, Italy; Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, Leninskij prospect 49, Moscow 119991, Russia (literal)

Titolo

In situ time-resolved X-ray diffraction study of evolution of nanohydroxyapatite particles in physiological solution (literal)

Abstract

Nanosized hydroxyapatite (nano-HA) is known to be of enhanced biological efficacy, being used in medical events as a mix with physiological solution, saline or patient's blood before the application. This study is aimed at the investigation of the time evolution of both phase composition and particle size of nano-HA in aqueous (isotonic 0.9% NaCl) solution. An energy-dispersive X-ray diffraction method, allowing the real time rapid data collection was employed. The X-ray amorphous component of initial powder was shown to convert fully into the crystalline hydroxyapatite (HA), the characteristic crystallization time being of approximately 25 min. The initial crystallite average size (approximately 35 nm) was enlarged by a factor of about 4 within the first 100 min after mixing the powder with the physiological solution and no more structural changes were detected during the following period. The sigmoidal kinetics of the HA crystal growth was evidenced. (literal)

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