University Politehnica of Bucharest, Faculty of Applied Chemistry and Materials Science, Polizu no 1-7, Bucharest, Romania.
Bioelectrochemistry. 2010 Aug;79(1):122-9. doi: 10.1016/j.bioelechem.2010.02.001. Epub 2010 Feb 10.
The paper is a new approach which aims to evaluate the relation between surface aspects (wettability and roughness) of materials based on titanium with native passive TiO(2) as untreated samples and TiO(2) nanotubes as treated discs respectively, their electrochemical stability in artificial saliva, and fibroblast cell behavior. Ti/TiO(2) modified electrodes as nanotubes with 120 nm as diameter were obtained using an electrochemical method as anodizing and surface analysis as SEM, AFM and contact angle measurements were performed to obtain topographical features and wettability. The TiO(2) nanotube structured oxide films electrochemical growth increases the stability of titanium surfaces. The electrochemical behavior of the Ti/TiO(2) nanotube surface was evaluated by corrosion parameters obtained from Tafel plots and electrical parameters for proposed circuits from electrochemical impedance spectroscopy were analyzed. The cell results indicated a slight preference in terms of cell survival and adhesion for nanostructure TiO(2) with a more hydrophilic character and the electrochemical data revealed that such features are connected with better stability in artificial saliva. The roughness seems to be not conclusive for this case.
本文提出了一种新方法，旨在评估基于钛的材料表面特性（润湿性和粗糙度）与电化学稳定性之间的关系，所用材料分别为具有天然钝化 TiO(2) 的未处理样品和经 TiO(2)纳米管处理的样品，以及在人工唾液中的电化学稳定性和成纤维细胞行为。使用电化学阳极氧化法获得直径为 120nm 的 Ti/TiO(2) 纳米管修饰电极，并通过 SEM、AFM 和接触角测量进行表面分析，以获得形貌特征和润湿性。TiO(2)纳米管结构氧化物薄膜的电化学生长提高了钛表面的稳定性。通过 Tafel 图获得的腐蚀参数和电化学阻抗谱提出的电路的电学参数来评估 Ti/TiO(2) 纳米管表面的电化学行为。细胞结果表明，具有更亲水特性的纳米结构 TiO(2) 在细胞存活和黏附方面略有优势，电化学数据表明，这些特性与人工唾液中的更好稳定性有关。在这种情况下，粗糙度似乎没有定论。
