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Phase-separation-induced micropatterned polymer surfaces and their applications

机译：相分离诱导的微图案化聚合物表面及其应用

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We report a route to fabricate micropatterned polymer films with micro- or nanometer-scale surface concavities by spreading polymer solutions on a non-solvent surface. The route is simple, versatile, highly efficient, low-cost, and easily accessible. The concavity density of the patterned films is tuned from 10(6) to 10(9) features cm(-2), and the concavity size is controlled in the range from several micrometers to less than 100 nm, by changing the film-forming parameters including the polymer concentration, the temperature of the non-solvent and the interactions between polymer, solvent, and non-solvent. We further demonstrate that these concavity-patterned films have significantly enhanced hydrophobicity, owing to the existence of the surface concavities, and their hydrophobicity could be controlled by the concavity density. These films have been used as templates to successfully fabricate convex-patterned polymer films, inorganic TiO2 microparticles, and NaCl nanocrystals. Their other potential applications are also discussed.
机译：我们报告了通过在非溶剂表面上散布聚合物溶液来制造具有微米或纳米级表面凹度的微图案化聚合物膜的途径。该路线简单，通用，高效，低成本且易于访问。图案化膜的凹度密度从10（6）调整为10（9）cm（-2），并且通过改变成膜度，将凹度尺寸控制在几微米至小于100 nm的范围内参数包括聚合物浓度，非溶剂的温度以及聚合物，溶剂和非溶剂之间的相互作用。我们进一步证明，由于表面凹坑的存在，这些凹坑图案化的膜具有显着增强的疏水性，并且它们的疏水性可以由凹坑密度控制。这些膜已被用作模板，以成功地制造凸面图案的聚合物膜，无机TiO2微粒和NaCl纳米晶体。还讨论了它们的其他潜在应用。

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