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首页> 外文期刊>Nanotechnology >Superhydrophilicity on microstructured titanium surfaces via a superficial titania layer with interconnected nanoscale pores
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Superhydrophilicity on microstructured titanium surfaces via a superficial titania layer with interconnected nanoscale pores

机译：通过具有相互连接的纳米级孔的表面二氧化钛层在微结构化钛表面上的超亲水性

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摘要

Microstructured titanium (Ti) surfaces often suffer from poor hydrophilicity which makes the realization of open microfluidic devices difficult. Here, we investigate the effect of a superficial porous titania (TiO_2) layer on the hydrophilicity of microstructured surfaces. High aspect ratio Ti micropillars were micromachined from bulk Ti sheets. Porous TiO_2 was subsequently grown on Ti micropillars by a wet oxidation route followed by thermal annealing. Porous TiO_2 was characterized using atomic force microscopy, x-ray diffraction and x-ray photoelectron spectroscopy. Detailed morphology study and pore size analysis were carried using focused ion beam machining coupled with scanning electron microscopy. Static contact angle and dynamic spreading studies clearly demonstrate enhanced hydrophilicity of microstructured Ti surfaces with a superficial porous TiO _2 layer. Such enhancement promises interesting applications in the microfluidics and microsystems fields.
机译：微结构化钛（Ti）表面通常具有较差的亲水性，这使得实现开放式微流体装置变得困难。在这里，我们研究表面多孔二氧化钛（TiO_2）层对微结构表面亲水性的影响。从块状Ti片上对高纵横比的Ti微柱进行了微加工。多孔TiO_2随后通过湿式氧化途径在Ti微柱上生长，然后进行热退火。使用原子力显微镜，X射线衍射和X射线光电子能谱对TiO_2进行了表征。使用聚焦离子束加工结合扫描电子显微镜进行了详细的形态学研究和孔径分析。静态接触角和动态扩展研究清楚地表明，具有表面多孔TiO _2层的微结构化Ti表面具有增强的亲水性。这种增强有望在微流体和微系统领域中得到有趣的应用。

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