The effect of crystal structure of TiO2 nanotubes on the formation ofcalcium phosphate coatings during biomimetic deposition
The effect of crystal structure of TiO2 nanotubes on the formation ofcalcium phosphate coatings during biomimetic deposition
复制标题
TiO2纳米管晶体结构对仿生沉积过程中磷酸钙涂层形成的影响
DOI：
10.1016/j.apsusc.2016.11.114
复制
发表时间：
2016
影响因子：
6.7
通讯作者：
Liu Lijia
中科院分区：
文献类型：
--
作者：
Liu Yi;Kim Sun;McLeod John A;Li Jun;Guo Xiaoxuan;Sham Tsun-Kong;Liu Lijia
The crystallization process of bioactive calcium phosphate (CaP) species via biomimetic deposition onto anodic TiO2nanotubes is investigated. The porous surface of nanostructured TiO2provides an ideal substrate for CaP crystallization. The compositions of CaP coatings are studied using X-ray absorption near-edge structures (XANES) at the Ca K-edge. Using detection modes with different probing depths, both the surface of the CaP coating and the CaP-TiO2interface are simultaneously analyzed. Calcium phosphate (CaP) species, such as hydroxyapatite (HAp), octacalcium phosphate (Ca8(HPO4)2(PO4)4·5H2O, OCP), brushite (CaHPO4·2H2O, DCPD), and amorphous calcium phosphate (ACP), are found in the CaP coatings. TiO2nanotubes of amorphous and anatase phases are comparatively studied to determine their effect on the efficiency of CaP formation and the phase transformation among CaP species in prolonged deposition time. It is found the composition of CaP coating has a strong dependency on the crystal structure of TiO2substrate and the kinetics (deposition time).
