DSpace
 

Researchspace >
General science, engineering & technology >
General science, engineering & technology >
General science, engineering & technology >

Please use this identifier to cite or link to this item: http://hdl.handle.net/10204/3372

Title: Effect of surface silanol groups on the deposition of apatite onto silica surfaces: a computer simulation study
Authors: Mkhonto, D
De Leeuw, NH
Keywords: Silanol groups
Apatite
Silica
Computer modelling
Hydroxy groups
Issue Date: Jan-2008
Publisher: Springer Science and Business Media
Citation: Mkhonto, D and De Leeuw, NH. 2008. Effect of surface silanol groups on the deposition of apatite onto silica surfaces: a computer simulation study. Journal of Materials Science Materials in Medicine. Vol. 19, pp 203-216
Abstract: Computer modelling techniques were employed to investigate the effect of surface silanol groups on the strength of adhesion of apatite thin films to silica surfaces. To this end, the researchers have studied a series of silica surfaces with different silanol densities and calculated their interaction with apatite thin films. The findings indicate that apatite does not attach strongly to surface hydroxy groups, but that apatite should deposit at dehydrated silica surfaces, especially when the surface silicon and oxygen species rearrange to form O–Si–O links. Any dangling silicon and oxygen bonds at the silica surfaces are saturated by coordination to oxygen and calcium atoms in the apatite layer, but the extra reactivity afforded by these under coordinated surface species does not necessarily lead to more favourable substrate/film interactions. The lowest energy silica/apatite interfaces are those where an undistorted apatite layer can be deposited on a regular, stable substrate surface. The researchers’ simulations support the suggestion, that in vivo surface hydroxy groups are first condensed to form O–Si–O bridges before deposition and growth of apatite
Description: Copyright: 2007 Springer Science and Business Media
URI: http://hdl.handle.net/10204/3372
ISSN: 0957-4530
Appears in Collections:General science, engineering & technology

Files in This Item:

File Description SizeFormat
Mkhonto_2007.pdf724.76 kBAdobe PDFView/Open
View Statistics

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

 

Valid XHTML 1.0! DSpace Software Copyright © 2002-2010  Duraspace - Feedback