Characterization and surface properties of amino-acid-modified, carbonate-containing hydroxyapatite particles

Jack, K.S., Vizcarra, T.G. and Trau, M. (2007) Characterization and surface properties of amino-acid-modified, carbonate-containing hydroxyapatite particles. Langmuir, 23 24: 12233-12242. doi:10.1021/la701848c


Author Jack, K.S.
Vizcarra, T.G.
Trau, M.
Title Characterization and surface properties of amino-acid-modified, carbonate-containing hydroxyapatite particles
Journal name Langmuir   Check publisher's open access policy
ISSN 0743-7463
Publication date 2007-01-01
Year available 2007
Sub-type Article (original research)
DOI 10.1021/la701848c
Open Access Status
Volume 23
Issue 24
Start page 12233
End page 12242
Total pages 10
Place of publication Washington
Publisher Amer Chemical Soc
Language eng
Subject 259999 Chemical Sciences not elsewhere classified
C1
770103 Weather
Abstract The surface properties (nature, strength, and stability of interaction of functional groups) and bulk morphologies of a series of amino-acid-functionalized carbonate-containing hydroxyapatite (CHA) particles were investigated. It was found that the amino acids were both occluded in and presented on the surface of the CHA particles. Furthermore, their presence enhanced particle colloidal stability by retardation of Ostwald ripening and in some cases increasing the magnitude of the xi-potential. Measurements of adsorption isotherms and xi-potential titrations have shown that the amino-acid- surface interactions are weak and reversible at pH 9 and consistent with a model in which the carboxyl terminus interacts with calcium ions in the CHA lattice. Complexities in adsorption behavior are discussed in terms of different adsorption mechanisms that may be prevalent at different pHs.
Keyword Chemistry, Physical
Calcium-phosphate Mineralization
Polar Side-groups
Aqueous-solutions
L-serine
Crystal-growth
Waste-water
Adsorption
Crystallization
Proteins
Apatites
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

 
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Created: Tue, 19 Feb 2008, 01:40:10 EST