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Self-assembly of nano-hydroxyapatite on multi-walled carbon nanotubes

Paper ID Volume ID Publish Year Pages File Format Full-Text
2199 103 2007 7 PDF Available
Title
Self-assembly of nano-hydroxyapatite on multi-walled carbon nanotubes
Abstract

Inspired by self-assembly of nano-hydroxyapatite (nHA) on collagen associated with the 67 nm periodic microstructure of collagen, we used multi-walled carbon nanotubes (MWCNTs) with approximately 40 nm bamboo periodic microstructure as a template for nHA deposition to form a nHA–MWCNT composite. The assembled apatite was analyzed by transmission electron microscopy and scanning electron microscopy. Defects that were analogous to edge dislocations along the carbon nanotubes’ multi-walled surfaces were the nucleation sites for nHA after these defects had been functionalized principally into carboxylic groups. Spindle-shaped units consisting of an assembly of near parallel, fibril-like nHA polycrystals were formed and oriented at a certain angle to the long axis of the carbon nanotubes, unlike nHA–collagen in which the nHA is oriented along the longitudinal axis of the collagen molecule. One possible explanation for this difference is that there are more bonds for calcium chelation (–COOH, >CO) on the collagen fibril surface than on the surface of MWCNTs. Spindle-shaped units that are detached from the MWCNT template are able to maintain the ordered parallel structure of the nHA polycrystal fibril. We have thus created a self-assembled hydroxyapatite on MWCNTs.

Keywords
Carbon nanotubes; Nano-hydroxyapatite; Bioinspired; Self-assembly; Collagen
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Publisher
Database: Elsevier - ScienceDirect
Journal: Acta Biomaterialia - Volume 3, Issue 5, September 2007, Pages 669–675
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