All-Nanoparticle Monolayer Broadband Antireflective and Self-Cleaning Transparent Glass Coatings
All-Nanoparticle Monolayer Broadband Antireflective and Self-Cleaning Transparent Glass Coatings
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DOI：
10.1021/acsami.0c18776
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发表时间：
2021-02-01
影响因子：
9.5
通讯作者：
Minko, Sergiy
中科院分区：
文献类型：
--
作者：
Gruzd, Alexey;Tokarev, Alexander;Minko, Sergiy
住宅和工业建筑中的绝大多数发光二极管和液晶显示器、太阳能电池板以及窗户都使用玻璃面板，因为玻璃面板具有较高的机械稳定性、耐化学性和光学性能。如果没有涂抗反射涂层，玻璃表面会反射约 4-5% 的入射光。除了显示器中的能量损失之外，表面反射还会降低图像质量。抗反射涂层工程对所有类型的玻璃屏幕都有好处，特别是当还需要玻璃表面的耐刮擦和自清洁性能时，特别是大屏幕和触摸屏设备。这项工作介绍了一种可扩展且稳健的方法，用于生产具有所需光学和机械性能的玻璃表面抗反射涂层。开发的涂层模仿了蛾眼角膜的结构。该涂层是玻璃表面上的亚波长微结构薄层，由单层半球形二氧化硅纳米颗粒制成，该纳米颗粒是通过球形颗粒水热熔合到玻璃基板上而获得的。调整逐层过程中颗粒沉积的顺序，以平衡纳米颗粒之间以及纳米颗粒与玻璃表面之间的吸引-排斥相互作用，生成表面覆盖率高达 70% 的涂层，超过了随机顺序添加模型的 54.7% 限制。这种水平的表面覆盖度可实现对所述应用有益的性能组合：(i) 可见光和近红外光谱的平均反射率为 0.5 +/- 0.2%，(ii) 改进的机械稳定性和耐刮擦性，以及 (iii) 不润湿行为。
The vast majority of light-emitting diode and liquid-crystal displays, solar panels, and windows in residential and industrial buildings use glass panels owing to their high mechanical stability, chemical resistance, and optical properties. Glass surfaces reflect about 4-5% of incident light if no antireflective coating is applied. In addition to energy losses in displays, surface reflections diminish picture quality. Engineering of antireflective coatings can be beneficial for all types of glass screens, specifically for large screens and touch-screen devices when scratch-resistance and self-cleaning properties of the glass surface are also desired. A scalable and robust approach to produce antireflective coatings for glass surfaces with desired optical and mechanical properties is introduced in this work. The developed coating mimics the structure of a moth-eye cornea. The coating is a subwavelength-microstructured thin layer on the glass surface made of a monolayer of hemispherical silica nanoparticles obtained by hydrothermal fusion of spherical particles to the glass substrate. The sequence of the particle deposition in the layer-by-layer process is adjusted to balance attractive-repulsive interactions among nanoparticles and between the nanoparticles and the glass surface to generate coatings with a high surface coverage of up to 70%, which exceeds the 54.7% limit of the random sequential addition model. This level of surface coverage allows for a combination of properties beneficial for the described applications: (i) an average reflectance of 0.5 +/- 0.2% for a visible and near-infrared optical spectrum, (ii) an improved mechanical stability and scratch resistance, and (iii) non-wetting behavior.