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首页> 外文期刊>International Journal of Electrochemical Science >Characterization of the Localized Surface Chemical Activity of Ti-Mo and Ti-Ta Alloys for Biomedical Applications Using Scanning Electrochemical Microscopy
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Characterization of the Localized Surface Chemical Activity of Ti-Mo and Ti-Ta Alloys for Biomedical Applications Using Scanning Electrochemical Microscopy

机译：使用扫描电化学显微镜表征用于生物医学的Ti-Mo和Ti-Ta合金的局部表面化学活性

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摘要

Scanning electrochemical microscopy (SECM) was employed for in situ characterization of surfacechemical activity of various Ti-Mo and Ti-Ta alloys for biomedical application. In this work the localdifferences in surface reactivity for different Ti-Mo and Ti-Ta alloys were analyzed when they werepolarized in 0.1 M NaCl solution and in Ringer physiological solution using SECM, and resultscompared to those for the unbiased samples. The analysis of the shape of the approach curves obtainedfor the Ti-Mo and Ti-Ta alloys shows a different behaviour to be distinguished depending on thenature of the alloying element. There are also differences among the various Ti-Ta alloys tested, thatcause changes in the shape of the approach curves with the value of the polarization applied to thesubstrate, defining a transition potential between -0.30 and -0.40 V vs. Ag/AgCl/KCl(3M) for most ofthe systems under study. Furthermore, from the line scans and array scans, a change in reactivity of thesurface has been observed corresponding to the activation of the localized sites which occursselectively with the applied potential. SECM is shown to be a powerful technique for the investigationof the surface characteristics of biomaterials in simulated physiological environments.
机译：扫描电化学显微镜（SECM）用于生物医学应用的各种Ti-Mo和Ti-Ta合金的表面化学活性的原位表征。在这项工作中，分析了不同Ti-Mo和Ti-Ta合金在0.1M NaCl溶液和林格生理溶液中使用SECM极化时表面反应的局部差异，并将结果与​​无偏样品的结果进行了比较。对Ti-Mo和Ti-Ta合金获得的接近曲线形状的分析表明，根据合金元素的性质，可以区分出不同的行为。所测试的各种Ti-Ta合金之间也存在差异，这是因为进场曲线的形状随施加到基板上的极化值而变化，从而定义了相对于Ag / AgCl / KCl的-0.30至-0.40 V之间的跃迁电位（3M）用于大多数正在研究的系统。此外，从线扫描和阵列扫描中，已经观察到表面反应性的变化，其与局部部位的激活相对应，该局部部位随施加的电势选择性地发生。 SECM被证明是在模拟生理环境中研究生物材料表面特性的强大技术。

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