Decoupling the effects of surface texture and chemistry on the wetting of metallic glasses
Decoupling the effects of surface texture and chemistry on the wetting of metallic glasses
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DOI：
10.1016/j.apsusc.2018.03.205
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发表时间：
2018-07
影响因子：
6.7
通讯作者：
Molla Hasan;J. Warzywoda;G. Kumar
中科院分区：
文献类型：
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作者：
Molla Hasan;J. Warzywoda;G. Kumar
我们报道了表面图图化对pt57.5 cu14.7 ni5.3 p22.5和pd43cu27ni10p20金属玻璃润湿的影响。为了保持金属玻璃表面化学的完整性，我们优化了热塑性模塑工艺并使用无化学脱模。结果表明，单尺度表面微观结构可以使pt57.5 cu14.7 ni5.3 p22.5金属玻璃在保持化学状态的情况下具有疏水性。我们还观察到，由于氧化，pd43cu27ni10p20金属玻璃无论其表面形貌如何都保持亲水性，尽管由于空气污染，其润湿性随着时间的推移而变化（即降低）。这些结果表明，要得出关于表面结构作用的明确结论，必须避免表面化学的伴随变化。
We report the effects of surface patterning on the wetting of Pt57.5Cu14.7Ni5.3P22.5and Pd43Cu27Ni10P20metallic glasses. To maintain the integrity of surface chemistry of the metallic glasses, we optimize thermoplastic patterning protocol and use chemical-free demolding. Our results show that single-scale surface microstructures can render inherently hydrophilic Pt57.5Cu14.7Ni5.3P22.5metallic glass hydrophobic when its chemical state is preserved. We also observe that because of oxidation, Pd43Cu27Ni10P20metallic glass remains hydrophilic regardless of its surface topography, though its wettability evolves (i.e. decreases) with time due to airborne contamination. These results suggest that to draw an unambiguous conclusion about the role of surface texture, concomitant changes in surface chemistry must be avoided.