Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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Transactions of Nonferrous Metals Society of China

Vol. 20    No. 10    October 2010

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Formation and in vitro induction ability of apatite nanobelt coating on silicon
WU Zhen-jun(吴振军)1, YUAN Jian-min(袁剑民)2, LI Wen-sheng(李文生)1,
REN Yan-qun(任艳群)1, CHEN Zong-zhang(陈宗璋)1

1. College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China;
2. College of Materials Science and Engineering, Hunan University, Changsha 410082, China

Abstract:Apatite coating with nanobelt structure was fabricated on single crystal silicon by a two-step method of electrodeposition at 1.0−2.0 mA/cm2 with DC power and vapor-thermal treatment (VTT) at 150−180 °C for 6 h over alkali medium. Scanning electron microscopy (SEM), X-ray diffractometry (XRD), and electron diffraction spectrometry (EDS) were employed to investigate the compositions and morphologies of specimens before or after vapor-thermal treatment. The results demonstrate that nanobelt crystals of coating, 0.5−2 μm in width, 100 nm in thickness, and 6−10 μm in length, are Ca-deficient apatite (CDA) with a mole ratio of Ca to P approximately of 1.60, which shows similarity of the nanobelt coating to inorganic phase in composition and to collagen in dimension appearing in human hard tissue. Induced nucleation and growth of bone-like apatite were observed on the nanobelt after soaking in a simulated body fluid (SBF) for 6 h and for 3 d, respectively, identifying that nanobelt has good ability for induction of bone-like apatite in SBF.


Key words: apatite; nanobelt; electrodeposition; vapor-thermal treatment; silicon

ISSN 1004-0609
CN 43-1238/TG

ISSN 1003-6326
CN 43-1239/TG

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