Self‐Cleaning Titanium Dioxide Metasurfaces with UV Irradiation,Laser & Photonics Reviews

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Self‐Cleaning Titanium Dioxide Metasurfaces with UV Irradiation
Laser & Photonics Reviews ( IF 9.8 ) Pub Date : 2020-12-23 , DOI: 10.1002/lpor.202000330
Yunkai Wu ₁ , Yujie Wang ₁ , Wenhong Yang ₁ , Qinghai Song _{1,

2} , Qinmiao Chen ₁ , Geyang Qu ₁ , Jiecai Han ₃ , Shumin Xiao _{1,

2,

3}

Affiliation

The delicate nature of optical components requires very special handling and storage procedures to maximize their performance and lifetime. In the optical field, a long‐standing challenge is the cleaning of unavoidable contaminants during the daily use, especially for the coated elements and the biomedical diagnostic devices. Herein, the authors tackle this problem and experimentally demonstrate TiO₂ based self‐cleaning optical meta‐devices with the illuminating of UV light. By arranging TiO₂ nanopillars into different patterns, high‐efficiency TiO₂ meta‐devices have been realized for the visible spectrum, for example, color nano‐printings, metalenses, and meta‐holograms. The TiO₂ meta‐devices become hydrophilic and photoactive under UV irradiation. Consequently, the contaminants, such as, stearic acid or fingerprints have been completely cleaned. Owing to the stability of TiO₂, the self‐cleaning effect and the internal nanostructures of meta‐devices are well preserved for many rounds of contamination. This research shall bring new opportunities to TiO₂ metasurfaces for extreme applications.

中文翻译：

紫外线辐射自清洁的二氧化钛超颖表面

光学组件的微妙特性要求非常特殊的处理和存储程序，以使其性能和使用寿命最大化。在光学领域，长期面临的挑战是在日常使用中如何清洁不可避免的污染物，尤其是对于涂层元件和生物医学诊断设备。在这里，作者解决了这个问题，并通过实验证明了基于TiO ₂的自清洁光学元器件具有紫外光的照射。通过将TiO ₂纳米柱布置成不同的图案，可以实现可见光谱的高效TiO ₂元装置，例如彩色纳米印刷，金属感官和元全息图。TiO ₂元设备在紫外线照射下变得亲水和光敏。因此，诸如硬脂酸或指印的污染物已被完全清洁。由于TiO ₂的稳定性，对于多轮污染，元设备的自清洁效果和内部纳米结构得到了很好的保存。这项研究将为极端应用为TiO ₂超表面带来新的机会。

更新日期：2021-02-11

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