Department of Engineering Sciences, Uppsala University, Uppsala, Sweden.
J Mater Sci Mater Med. 2013 Jan;24(1):11-5. doi: 10.1007/s10856-012-4780-6. Epub 2012 Oct 5.
In the present study, commercially pure titanium was irradiated with UV-light with varying wavelengths using a Q-switched Nd:YAG-laser. This was performed in order to investigate if a laser treatment can be employed to rapidly introduce hydrophilic properties to titanium surfaces, which is believed to facilitate protein adsorption and cell attachment. It was demonstrated that irradiation with 355 nm light (10 Hz, 90 mJ/shot) for 1 min or more caused an ion conversion of Ti(4+) to Ti(3+) sites in the surface oxide which lead to an increase in hydrophilicity of the surface. Furthermore, shorter irradiation times at 355 nm caused a surface structuring that gave rise to an unexpected and unstable hydrophobic state at the surface. Irradiation with 266 nm light (10 Hz, 40 mJ/shot) did not introduce any ion conversion in the surface oxide, nor did it give rise to any hydrophobicity of the surface.
在本研究中，使用 Q 开关 Nd:YAG 激光对商用纯钛进行了不同波长的紫外线辐照。这是为了研究激光处理是否可以快速将亲水性引入钛表面，这被认为有助于蛋白质吸附和细胞附着。结果表明，用 355nm 光（10Hz，90mJ/shot）辐照 1 分钟或更长时间会导致表面氧化物中 Ti(4+)向 Ti(3+)位的离子转换，从而增加表面的亲水性。此外，在 355nm 时较短的辐照时间会导致表面结构化，从而在表面上产生出乎意料且不稳定的疏水性状态。用 266nm 光（10Hz，40mJ/shot）辐照不会在表面氧化物中引入任何离子转换，也不会使表面呈现疏水性。
