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首页> 外文期刊>Biomolecular engineering >Morphology and chemical characterization of Ti surfaces modified for biomedical applications.
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Morphology and chemical characterization of Ti surfaces modified for biomedical applications.

机译：用于生物医学应用的钛表面的形貌和化学表征。

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摘要

The aim of the present work is to characterize in detail the chemical composition and morphology of titanium surfaces subjected to various environments. Modifications consisted of exposure of Ti to acidic, alkaline or polymer solutions. Such modifications result in chemical and/or morphological changes in the Ti surface. Special attention has been given to identifying the factors influencing cell adhesion and growth. SEM examinations provided morphological characterization of the Ti samples. Surface analytical techniques such as AES or XPS combined with Ar(+) ion sputtering allowed examination of the chemical properties of the Ti surface after chemical pretreatments and investigating the chemical composition of the Ti oxide layer. Raman spectroscopy investigations allowed determination of the crystalline phases of the Ti-oxide layers and characterization of the dextran-modified surface. The results show large differences in the morphology of Ti pretreated with different procedures whereas only minor differences in the chemistry of the surfaces were found. High-resolution Auger investigations have revealed that all the chemical modifications of Ti surfaces resulted in the formation of a titanium oxide layer. XPS confirmed that TiO(2) is the main component of the chemically modified Ti surface. The Raman spectroscopy investigations showed that the titanium surface with a dextran coating is rich in hydroxyl groups. All the surfaces investigated exhibit a hydrophilic character. The possible influence of various surface features on surface biocompatibility is discussed.
机译：本工作的目的是详细表征经受各种环境的钛表面的化学组成和形态。改性包括将Ti暴露于酸性，碱性或聚合物溶液中。这种修饰导致Ti表面的化学和/或形态变化。已经特别注意确定影响细胞粘附和生长的因素。 SEM检查提供了Ti样品的形态表征。表面分析技术（例如AES或XPS与Ar（+）离子溅射结合使用）可以在化学预处理后检查Ti表面的化学性质，并研究Ti氧化物层的化学成分。拉曼光谱研究允许确定氧化钛层的晶相和表征葡聚糖修饰的表面。结果表明，用不同方法预处理的Ti的形貌差异很大，而在表面化学上只有很小的差异。高分辨率俄歇研究表明，Ti表面的所有化学修饰均导致形成氧化钛层。 XPS证实TiO（2）是化学修饰的Ti表面的主要成分。拉曼光谱研究表明，具有葡聚糖涂层的钛表面富含羟基。研究的所有表面均表现出亲水性。讨论了各种表面特征对表面生物相容性的可能影响。

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