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	Self-assembly of nano-hydroxyapatite on multi-walled carbon nanotubes
	Liao, Susan ; Xu, Guofu ; Wang, Wei ; Watari, Fumio ; Cui, Fuzhai ; Ramakrishna, Seeram ; Chan, Casey K.
	2010-05-10 ; 2010-05-10
关键词	carbon nanotubes nano-hydroxyapatite bioinspired self-assembly collagen ROOM-TEMPERATURE COLLAGEN APATITE GROWTH MINERALIZATION MICRORIBBONS FABRICATION NUCLEATION COMPOSITE OXIDATION Engineering, Biomedical Materials Science, Biomaterials
中文摘要	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, > C = O) 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. (c) 2007 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
语种	英语 ; 英语
出版者	ELSEVIER SCI LTD ; OXFORD ; THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/20828]
专题	清华大学
推荐引用方式 GB/T 7714	Liao, Susan,Xu, Guofu,Wang, Wei,et al. Self-assembly of nano-hydroxyapatite on multi-walled carbon nanotubes[J],2010, 2010.
APA	Liao, Susan.,Xu, Guofu.,Wang, Wei.,Watari, Fumio.,Cui, Fuzhai.,...&Chan, Casey K..(2010).Self-assembly of nano-hydroxyapatite on multi-walled carbon nanotubes..
MLA	Liao, Susan,et al."Self-assembly of nano-hydroxyapatite on multi-walled carbon nanotubes".(2010).

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