Paper Title:
Nanoscale Morphology of Apatite Precipitated onto Synthetic Hydroxyapatite from Simulated Body Fluid
  Abstract

Dense, polycrystalline, synthetic hydroxyapatite (HA) was incubated for 36 days in modified simulated body fluid (SBF) with increased HCO3 - and reduced Cl- ion concentrations (27 and 120 mM, respectively) closer to actual blood plasma than typical SBF. The resulting precipitated apatite layer was characterized by X-ray photoelectron spectroscopy (XPS) and contact angle measurements and found to be nonstoichiometric, calcium deficient (Ca/P~1.06), non-carbonate containing, and of intermediate hydrophilicity (advancing contact angle, qa=76.5±1.3°). The nanoscale surface topography of the SBF-incubated HA sample was imaged by tapping mode atomic force microscopy (TMAFM), observed to be ≤100 nm in thickness, and composed of three distinct morphologies. These topographically distinct regions were localized within individual grains and facets of the initial HA surface and included: hemispherical, globular structures (maximum lateral dimension, d=44.7±12.7 nm, peak-tovalley height, h=3.6±2.7 nm); elongated, needle-like structures (minimum lateral dimension, w=31.0±8.5 nm, d=104.4±31.1 nm, h=5.0±3.2 nm), and regions of larger, irregularly shaped structures that were relatively smooth (d=504.9±219.1 nm, h=104.0±51.7 nm).

  Info
Periodical
Key Engineering Materials (Volumes 284-286)
Main Theme
Edited by
Panjian Li, Kai Zhang and Clifford W. Colwell, Jr.
Pages
497-500
DOI
10.4028/www.scientific.net/KEM.284-286.497
Citation
J. Vandiver, N. Patel, W. Bonfield, C. Ortiz, "Nanoscale Morphology of Apatite Precipitated onto Synthetic Hydroxyapatite from Simulated Body Fluid ", Key Engineering Materials, Vols. 284-286, pp. 497-500, 2005
Online since
April 2005
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: E.S. Thian, Jie Huang, Serena Best, Zoe H. Barber, William Bonfield
Abstract:0.8 wt.% silicon-containing hydroxyapatite (Si-HA) thin films of thickness 600 nm have been successfully developed using a magnetron...
445
Authors: Isabel B. Leonor, Francisco Balas, Masakazu Kawashita, Rui L. Reis, Tadashi Kokubo, Takashi Nakamura
Abstract:Bioactive polymeric microspheres can be produced by pre-coating them with a calcium silicate solution and the subsequent soaking in a...
279
Authors: Hai Long Yang, Shouichi Somegawa, Ying Jie Yang, Zhi Chen Luo
617
Authors: Hiroto Mizutani, Takeshi Yabutsuka, Shigeomi Takai, Takeshi Yao
Chapter 1: Apatites and Calcium Phosphate
Abstract:When the pH or the temperature of a simulated body fluid (SBF) is raised, fine particles of calcium phosphate are precipitated. We found that...
40
Authors: Keito Fukushima, Takeshi Yabutsuka, Shigeomi Takai, Takeshi Yao
Chapter 3: Bioceramics in Practice of Scaffolds, Tissue Engineering and Implantation
Abstract:Micropores were formed on the surface of a polyetheretherketone (PEEK) by soaking in sulfuric acid. In order to provide bioactivity to PEEK,...
145