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Synthesis and characterization of needlelike apatitic nanocomposite with controlled aspect ratios

Paper ID Volume ID Publish Year Pages File Format Full-Text
12338 790 2003 8 PDF Available
Title
Synthesis and characterization of needlelike apatitic nanocomposite with controlled aspect ratios
Abstract

Calcium-deficient apatitic (cd-HA) crystals with core-shell nanostructure with needlelike shape, 5–10 nm in diameter and 20–80 nm in length, were prepared via an in situ formation in the presence of polyacrylic acid (PAA) under aqueous solution of different pH values, ranging from 9 to 11. Nanostructure of the resulting crystals showing a core-shell configuration with a thin layer of PAA shell of about 1 nm thickness was investigated. Aspect ratio (AR) of the needlelike composite was found to depend on the concentration of the PAA and solution pH. At lower solution pH, crystal growth was inhibited, i.e., leading to a decreased AR, with increase of PAA concentration, while an increased AR was detected at higher solution pH, suggesting a preferential growth of the cd-HA nanocrystals. Mechanism of such preferential growth was tentatively proposed and is suggested to correct PAA adsorption along the long axis of the needlelike nanoparticles.

Keywords
Calcium-deficient hydroxyapatite; Poly(acrylic acid); Aspect ratio; Needlelike crystals; Nanocomposites; Preferential crystal growth
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Synthesis and characterization of needlelike apatitic nanocomposite with controlled aspect ratios
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Publisher
Database: Elsevier - ScienceDirect
Journal: Biomaterials - Volume 24, Issue 22, October 2003, Pages 3981–3988
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us