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The effect of crystal structure of TiO2 nanotubes on the formation of calcium phosphate coatings during biomimetic deposition

机译：仿生沉积过程中TiO2纳米管的晶体结构对磷酸钙涂层形成的影响

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摘要

The crystallization process of bioactive calcium phosphate (CaP) species via biomimetic deposition onto anodic TiO2 nanotubes is investigated. The porous surface of nanostructured TiO2 provides 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-TiO2 interface are simultaneously analyzed. Calcium phosphate (CaP) species, such as hydroxyapatite (HAp), octacalcium phosphate (Ca-8(HPO4)(2)(PO4)(4)center dot 5H(2)O, OCP), brushite (CaHPO4 center dot 2H(2)O, DCPD), and amorphous calcium phosphate (ACP), are found in the CaP coatings. TiO2 nanotubes 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 TiO2 substrate and the kinetics (deposition time). (C) 2016 Elsevier B.V. All rights reserved.
机译：研究了生物活性磷酸钙（CaP）物种通过仿生沉积到阳极TiO2纳米管上的结晶过程。纳米结构的TiO2的多孔表面为CaP结晶提供了理想的基材。 CaP涂层的成分使用Ca K边缘的X射线吸收近边缘结构（XANES）进行研究。使用具有不同探测深度的检测模式，可以同时分析CaP涂层的表面和CaP-TiO2界面。磷酸钙（CaP）种类，例如羟基磷灰石（HAp），磷酸八钙（Ca-8（HPO4）（2）（PO4）（4）中心点5H（2）O，OCP），透钙磷石（CaHPO4中心点2H（在CaP涂层中发现有2）O，DCPD）和无定形磷酸钙（ACP）。对非晶态和锐钛矿相的TiO2纳米管进行了比较研究，以确定它们对CaP形成效率和CaP物种之间相变在延长沉积时间内的影响。发现CaP涂层的组成对TiO 2衬底的晶体结构和动力学（沉积时间）具有强烈的依赖性​​。 （C）2016 Elsevier B.V.保留所有权利。

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  • 来源
    《Applied Surface Science》 |2017年第2期|1212-1219|共8页
  • 作者

    Liu Yi; Kim Sun; McLeod John A.; Li Jun; Guo Xiaoxuan; Sham Tsun-Kong; Liu Lijia;

  • 作者单位

    Soochow Univ, Jiangsu Key Lab Carbon Based Funct Mat & Devices, Inst Funct Nano & Soft Mat FUNSOM, Soochow Univ Western Univ Ctr Synchrotron Radiat, Suzhou 215123, Jiangsu, Peoples R China;

    Univ Western Ontario, Dept Chem, 1151 Richmond St, London, ON N6A 5B7, Canada|Univ Alberta, Dept Chem, 11227 Saskatchewan Dr, Edmonton, AB T6G 2G2, Canada;

    Soochow Univ, Jiangsu Key Lab Carbon Based Funct Mat & Devices, Inst Funct Nano & Soft Mat FUNSOM, Soochow Univ Western Univ Ctr Synchrotron Radiat, Suzhou 215123, Jiangsu, Peoples R China;

    Univ Western Ontario, Dept Chem, 1151 Richmond St, London, ON N6A 5B7, Canada;

    Univ Western Ontario, Dept Chem, 1151 Richmond St, London, ON N6A 5B7, Canada|Univ Saskatchewan, Dept Chem, 110 Sci Pl, Saskatoon, SK S7H 3B4, Canada;

    Soochow Univ, Jiangsu Key Lab Carbon Based Funct Mat & Devices, Inst Funct Nano & Soft Mat FUNSOM, Soochow Univ Western Univ Ctr Synchrotron Radiat, Suzhou 215123, Jiangsu, Peoples R China|Univ Western Ontario, Dept Chem, 1151 Richmond St, London, ON N6A 5B7, Canada;

    Soochow Univ, Jiangsu Key Lab Carbon Based Funct Mat & Devices, Inst Funct Nano & Soft Mat FUNSOM, Soochow Univ Western Univ Ctr Synchrotron Radiat, Suzhou 215123, Jiangsu, Peoples R China;

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  • 正文语种 eng
  • 中图分类
  • 关键词

    Calcium phosphate; TiO2 nanotubes; Biomimetic coating; Crystallization; X-ray absorption spectroscopy;

    机译：磷酸钙;TiO2纳米管;仿生涂层;结晶;X射线吸收光谱;

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