Journal of Materials Science

, Volume 45, Issue 23, pp 6562–6568

Hydroxyapatite formation on metallurgical grade nanoporous silicon particles


DOI: 10.1007/s10853-010-4745-4

Cite this article as:
Chadwick, E.G., Clarkin, O.M. & Tanner, D.A. J Mater Sci (2010) 45: 6562. doi:10.1007/s10853-010-4745-4


Studies into bone-like apatite or hydroxyapatite (HA) growth on potential biomaterials when in contact with simulated body fluid (SBF) not only establish a general method for determining bioactivity but coincidently lead to the design of new bioactive materials in biomedical and tissue engineering fields. Previous studies of HA growth on porous silicon (PS) have examined electrochemically etched silicon substrates after immersion in a SBF. This study differs from previous work in that it focuses on characterising HA growth on chemically etched metallurgical grade nanoporous silicon particles. The PS used in this study is comprised of nanosponge particles with disordered pore structures with pore sizes ranging up to 10 nm on micron-sized particles. The silicon particles are analysed before and after immersion into SBF using scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy dispersive X-ray (EDX) analysis and X-ray photoelectron spectroscopy (XPS). Results indicate that a HA layer forms on the surface of the nanosponge particles. Experimental analysis indicates that the morphology and calcium-to-phosphorus ratio (Ca/P) verify the formation of crystalline HA on the nanoporous silicon particles.

Supplementary material

10853_2010_4745_MOESM1_ESM.doc (250 kb)
(DOC 250 kb)

Copyright information

© Springer Science+Business Media, LLC 2010

Authors and Affiliations

  • E. G. Chadwick
    • 1
    • 3
  • O. M. Clarkin
    • 1
    • 2
  • D. A. Tanner
    • 1
    • 3
  1. 1.Materials & Surface Science InstituteUniversity of LimerickLimerickIreland
  2. 2.Clinical Materials UnitUniversity of LimerickLimerickIreland
  3. 3.Department of Manufacturing and Operations EngineeringUniversity of LimerickLimerickIreland