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dc.contributor.authorLiou, SCen_US
dc.contributor.authorChen, SYen_US
dc.contributor.authorLee, HYen_US
dc.contributor.authorBow, JSen_US
dc.date.accessioned2014-12-08T15:39:50Z-
dc.date.available2014-12-08T15:39:50Z-
dc.date.issued2004-01-01en_US
dc.identifier.issn0142-9612en_US
dc.identifier.urihttp://dx.doi.org/10.1016/S0142-9612(03)00479-4en_US
dc.identifier.urihttp://hdl.handle.net/11536/27214-
dc.description.abstractNano-sized calcium-deficient apatitic (CDHA) crystals with Ca/P ratios from 1.5 to 1.67 were synthesized using wet chemical method and of needle-like shape with 5-10 nm in diameter and 40-50 nm in length was observed. The structural environment of the Ca atoms in all the CDHA nano-crystals has been investigated using EXAFS, XANES and EELS. The results reveal that a maximum Fourier transform amplitude occurs at the apatite with a Ca/P ratio of 1.67 and the structural disorder increase following the sequence of 1.67 > 1.5 > 1.6 > 1.55. A similar phenomenon is also observed in both K-edge XANES and L-2,L-3-edge ELNES in the Ca atom. The structural analysis further demonstrates that different chemical and biological properties among these CDHA nano-crystals with Ca/P ratio from 1.5 to 1.67 are primarily due to the effect of stoichiometry and non-stoichiometry as compared to the structural order-disorder. (C) 2003 Elsevier Ltd. All rights reserved.en_US
dc.language.isoen_USen_US
dc.subjectcalcium-deficient apatites (CDHA)en_US
dc.subjectneedle-like crystalsen_US
dc.subjectX-ray absorption near-edge structure (XANES)en_US
dc.subjectelectron energy loss spectrometry (EELS)en_US
dc.subjectelectron-energy loss near-edge structure (ELNES)en_US
dc.subjectstoichiometryen_US
dc.subjectnon-stoichiometryen_US
dc.titleStructural characterization of nano-sized calcium deficient apatite powdersen_US
dc.typeArticleen_US
dc.identifier.doi10.1016/S0142-9612(03)00479-4en_US
dc.identifier.journalBIOMATERIALSen_US
dc.citation.volume25en_US
dc.citation.issue2en_US
dc.citation.spage189en_US
dc.citation.epage196en_US
dc.contributor.department材料科學與工程學系zh_TW
dc.contributor.departmentDepartment of Materials Science and Engineeringen_US
dc.identifier.wosnumberWOS:000186727700001-
dc.citation.woscount84-
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