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首页> 外文会议>Advances in bioceramics and porous ceramics V >UV-IRRADIATION MODIFIES CHEMISTRY OF ANATASE LAYER ASSOCIATED WITH IN VITRO APATITE NUCLEATION
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UV-IRRADIATION MODIFIES CHEMISTRY OF ANATASE LAYER ASSOCIATED WITH IN VITRO APATITE NUCLEATION

机译：体外磷灰石成核相关的锐钛矿层的紫外辐射修饰化学

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摘要

Anatase layer was derived on pure titanium substrates by the H_2O_2 treatment and calcination, on which UV was irradiated in air (UVa) and in ultra pure water (UVw). The effects of the UV irradiation on in vitro apatite formation in Kokubo's simulated body fluid were interpreted in terms of the modified chemistry of the anatase layer. The UVa treatment reduced apatite formation while the contrary effects were observed for the UVw treatment. From Ols X-ray photoelectron spectroscopic (XPS) analysis, those results were correlated to the change in the relative amount of Ti-OH (basic TiOH) and Ti-O(H)-Ti (acidic Ti-OH). Combining the XPS analysis and the apatite growth characteristics, i.e., the number and size of the semi-spherical particles and their surface-coverage, derived a plausible model: proper assembly of those sites (Ti-OH and Ti-O(H)-Ti) that collect both calcium and phosphate ions together should only give rise to induction of apatite nucleation.
机译：通过H_2O_2处理和煅烧，在纯钛基材上获得了锐钛矿层，然后在空气（UVa）和超纯水（UVw）中辐照UV。根据锐钛矿层化学性质的变化，可以解释紫外线对小久保模拟体液中体外磷灰石形成的影响。 UVa处理减少了磷灰石的形成，而UVw处理则观察到相反的效果。根据Ols X射线光电子能谱（XPS）分析，这些结果与Ti-OH（碱性TiOH）和Ti-O（H）-Ti（酸性Ti-OH）相对量的变化相关。结合XPS分析和磷灰石生长特性（即半球形颗粒的数量和大小及其表面覆盖率），得出了一个合理的模型：这些位点（Ti-OH和Ti-O（H）-收集钙离子和磷酸根离子的Ti）仅会引起磷灰石成核。

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  • 会议地点 Daytona Beach FL(US);Daytona Beach FL(US);Daytona Beach FL(US);Daytona Beach FL(US)
  • 作者

    Keita Uetsuki; Shinsuke Nakai; Yuki Shirosaki; Satoshi Hayakawa; Akiyoshi Osaka;

  • 作者单位

    RD Center, Nakashima Medical Co. Ltd. Haga, Kita-ku, Okayama 701-1221, Japan;

    Graduate School of Natural Science and Technology, Okayama University Tsushima Naka, Kita-ku, Okayama 700-8530, Japan;

    Graduate School of Natural Science and Technology, Okayama University Tsushima Naka, Kita-ku, Okayama 700-8530, Japan;

    Graduate School of Natural Science and Technology, Okayama University Tsushima Naka, Kita-ku, Okayama 700-8530, Japan;

    Graduate School of Natural Science and Technology, Okayama University Tsushima Naka, Kita-ku, Okayama 700-8530, Japan;

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