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Journal of Nanoelectronics and Optoelectronics · 2021 ·Vol. 16 ·期 2 ·208-212 · IF 0.961

Facile Fabrication of Fluorine-Free Superhydrophobic Surfaces with SiO2 Monospheres

Liu Zhong-Peng,Song Si-Nan,Zhang Mu

Recently, superhydrophobic surface on various type of substrates have attracted much attentions in electronics field. In this work, the classic Stöber method was used to prepare spherical silica particles with different particle sizes by adding different amounts of electrolyte (potassium chloride), giving rise to size distribution ranging from 300 nm to 2.55 yitm. Herein we constructed a micro-nano lotus-like structure in a facile way, achieving a superhydrophobic surface with using any Fluorine related chemicals. In the sense, the silica particles modified with HMDS were sprayed to prepare hydrophobic surface with contact angle up to 152.96° by increasing the frequency of sprays.

研究领域: 材料科学 · 表面工程学

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International Journal of Nanoscience · 2023 · IF 0.8

Facile Fabrication of Graded-Refractive-Index SiO2 Antireflective Films with Enhanced Laser Damage Resistance

Jie Yang,Jun Li,Zhantao Wei,Tao Wang,Hang Jiang,Likang Xiao,Jianghe Lan,Jiayi Zhu,Xiaoru Liu,Gang Xu,Zhipeng Gao,Zhengwei Xiong

The graded-refractive-index SiO 2 antireflective (AR) films were prepared using the sol–gel method. A monolayer with a porous nanonetwork structure was designed as the mixed volume ratio of 70:30 between the alkali- and acid-catalyzed SiO 2 sols. As the top layer, the hexamethylisilazane (HMDS) modified alkali catalyzed SiO 2 sols induced SiO 2 nanoparticles transforming from hydrophilic to hydrophobic nature. In comparison with the structures of monolayer and bilayer films, the AR properties and laser damage resistance were investigated in detail. By designing the nanostructures of the bottom and top layers, the graded- refractive-index SiO 2 film was obtained, consequently enhancing the AR performance. In the bilayer film, the transmittance reached ∼ 98%@532 nm and 97%@1064 nm, respectively, corresponding to the obvious reduction of reflectivity. The assembly of the bilayer SiO 2 film increased the laser-induced damage threshold by ∼ 30% from 25.3 J/cm 2 (monolayer) to 33.1 J/cm 2 (bilayer). The inducement of laser damage was further revealed by the analysis of morphological changes induced by laser damage, attributing to the initiator absorption of environmental contaminations. Therefore, the SiO 2 film not only provided a graded-refractive-index structure with good AR performance, but also had high laser damage resistance. The unique graded-refractive-index structure of SiO 2 AR films offers a new strategy for improving the performance of optical components in high-power laser systems.

研究领域: 光学材料 · 薄膜技术 · 光子学 · 应用物理 · 材料科学

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Facile Fabrication of Fluorine-Free Superhydrophobic Surfaces with SiO2 Monospheres

Facile Fabrication of Graded-Refractive-Index SiO2 Antireflective Films with Enhanced Laser Damage Resistance