Patterning of Surfaces by Polysilicon for Inducing Hydroxyapatite Growth by Laser-Liquid-Solid Interaction

Liliana Pramatarova 1Emilia V. Pecheva 1Radina Presker 3Attila L. Tóth 2Erike Horvath 2

1. Institute of Solid State Physics, Bulgarian Academy of Sciences (ISSP-BAS), 72, Tzarigradsko Chaussee blvd., Sofia 1784, Bulgaria
2. Hungarian Academy of Sciences, Research Institute for Technical Physics and Materials Science, P.O.Box 49, Budapest H-1525, Hungary
3. Technical University, Walter Schottky Institute, Am Coulombwall 3, München D-85748, Germany

Abstract

After oxygen, silicon (Si) is the second most abundant element in the environment and is present as impurity in most of the materials. The widespread occurrence of siliceous biominerals as structural elements in lower plants and animals suggests that Si plays a role in the production and maintenance of connective tissue in higher organisms [1]. It has been shown that Si is necessary in the bones, cartilage and in the formation of the connective tissue, as well as in some important metabolic processes [1]. Additionally, well known is that Si participates as SiO2 in the precipitation of apatite layers on bio-active glasses.

Polysilicon layers are deposited on glass substrates by subsequent or simultaneous RF magnetron sputtering of Al and a-Si in vacuum and as a result Si nanocrystallites are formed. The as-patterned surfaces are tested in terms of their reactivity towards inducing hydroxyapatite (HA) formation from simulated body fluid (SBF) by applying a method of laser-liquid-solid interaction (LLSI). Subsequently the samples are left in the same SBF in which they are irradiated with the laser for 4 hours. The grown structures are analyzed by SEM, LM, EDX, XRD, FTIR and Raman Spectroscopy.

Keywords
Hydroxyapatite, patterned surfaces, polysilicon, laser-liquid-solid interaction, simulated body fluid

References
[1]. D. Evered, M. O’Connor, Silicon Biochemistry, CIBA Foundation Symposium 121, Wiley&Sons Ltd., London, 1986

 

Related papers
  1. Investigation of nano hydroxyapatite prepared from eggshell and seashell
  2. Synthesis of Micro- and Nano-Sized LiNi0.5Mn1.5O4 and LiNi0.5Mn0.5O2 Materials and Studies of Their Electrode Behavior in Li-Ion Cells
  3. Magneto-conductance through nanoconstriction in ferromagnetic (Ga,Mn)As film
  4. Natural opal as a model system for studying the process of biomineralization
  5. Hydroxyapatite growth on surfaces modified by CdSe or Si nanoparticles embedded in SiOx thin films
  6. Extra cellular matrix used in-vitro model system for hydroxyapatite formation
  7. Growth of hydroxyapatite layers on modified by ion beam patterned solid surfaces for studying the biomineralization

Presentation: oral at E-MRS Fall Meeting 2005, Symposium F, by Emilia V. Pecheva
See On-line Journal of E-MRS Fall Meeting 2005

Submitted: 2005-05-19 13:10
Revised:   2009-06-07 00:44