Deposition of Plate-Like Apatite on Nacre Surfaces and Its in Vitro Bioactivity

作者：Guo Yaping; Tang Haixiong; Jia Dechang; Zhou Yu^*

来源：Rare Metal Materials and Engineering, 2009, 38: 834-837.

• apatite
• nacre
• bioactivity
• dissolution-recrystallization reaction

Apatite was converted from nacre by treatment with a phosphate buffer solution (PBS) at 37 degrees C. The morphology, structure, and thermal stability of the apatite were characterized by X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). After soaking in PBS for 24 h, the carbonate apatite plates with a Ca/P molar ratio of 1.35 +/- 0.05 are deposited on the nacre surfaces via a dissolution-recrystallization reaction. The crystalline of apatite obtained at low temperatures is low, and the PO(4)(3-) and OH(-) ions in the lattice are replaced partly by HPO(4)(2-) and CO(3)(2-) ions. Simulated body fluid (SBF) immersion tests reveal that the apatite converted from nacre exhibits a superior in vitro bone-forming bioactivity. The apatite may be promising for bone scaffold materials and bone cavity filling materials.

• 出版日期2009-12
• 单位哈尔滨工业大学