Holey layer of the TiO₂ nanorod-covered surface obtained by the self-organization of polysterene (PS) templates is shown to achieve programmable wettability by creating nano- to micrometer-scale porosity, which is useful to demonstrate stable and self-powered Schottky junction-based UV photodetectors. The wettability characterized by static water contact angle (WCA) is found to be ∼40° (weak hydrophilic) with the nanorod film of micrometer-scale pores with a diameter of 9.91 μm and periodicity of 2.8 μm. In contrast, the holey layer of the TiO₂ nanorod-covered surface with pores with a diameter of 90 nm and periodicity of pores of 1.4 μm shows a WCA ≈ 166°, which do not require any low surface energy coating and physical deposition techniques. A pure phase solution-processed superhydrophobic holey 1D TiO₂ nanorod film in sandwiched configuration with platinized fluorine-doped tin oxide (FTO) electrodes shows self-powered and fast UV detection (rise time, ∼44 ms; decay time, ∼25 ms) with very high responsivity (25 A/W). The superhydrophobic sample hinders the water molecules from infiltrating into the sandwich junction, making the device performance extremely stable even in humid conditions.

中文翻译：

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聚合物薄膜去湿介导的可湿性控制的二氧化钛纳米棒阵列，用于高响应性，水稳定的自供电紫外光电探测器

通过聚苯乙烯（PS）模板的自组织获得的覆盖TiO ₂纳米棒的表面的多孔层显示出通过产生纳米级至微米级的孔隙率来实现可编程的润湿性，这对于证明稳定且自供电的肖特基结非常有用的紫外光电探测器。以直径为9.91μm，周期为2.8μm的微米级孔的纳米棒膜为特征，发现以静态水接触角（WCA）为特征的润湿性约为40°（弱亲水性）。相反，TiO ₂的多孔层纳米棒覆盖的表面上的孔直径为90 nm，孔的周期性为1.4μm，显示出WCA≈166°，不需要任何低表面能涂层和物理沉积技术。纯溶液固溶处理的超疏水多孔一维TiO ₂纳米棒膜与镀铂的氟掺杂氧化锡（FTO）电极呈三明治结构，显示出自供电且快速的紫外线检测（上升时间约44 ms；衰减时间约25 ms）。具有很高的响应度（25 A / W）。超疏水性样品会阻止水分子渗入三明治结，即使在潮湿条件下，设备性能也极其稳定。