Effect of Mg on surface roughness and protein content of protein-apatite composite layers

Yuusuke Ishikawa*, Nao Kondo, Yu Sogo, Atsuo Ito, Eiji Uchimura, Ayako Oyane, Tadao Ohno, Atsushi Yamazaki, Takashi Ushida, Katsuko Furukawa

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


Fibronectin (FN)-apatite composite layers were formed on a hydroxyapatite (HAP) ceramic using supersaturated calcium phosphate (CP) solutions. The surface roughness of the composite layer could be controllable by changing the magnesium (Mg) concentration in the CP solution. The higher the Mg concentration, the smaller the apatite crystals in the layer were. The thickness of the layer formed in the CP solution containing 1.5 mM Mg decreased to 68% that formed in the Mg-free CP solution. The amount of FN immobilized in the layer was almost constant regardless of Mg concentration in the CP solution in the range from 0 to 1.5 mM. The results of the present study revealed that a thin FN-apatite composite layer with a smooth surface and a high protein content is formed in a CP solution at a Mg concentration of 1.5 mM.

Original languageEnglish
Pages (from-to)85-88
Number of pages4
JournalKey Engineering Materials
Volume309-311 I
Publication statusPublished - 2006


  • Composite layer
  • Fibronectin
  • Hydroxyapatite
  • Magnesium
  • Surface roughness

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering


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