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Double-layer tri-wavelength hydrophobic antireflective coatings derived from methylated silica nanoparticles and hybrid silica nanoparticles

  • Original Paper: Functional coatings, thin films and membranes (including deposition techniques)
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Abstract

In this paper, we reported the design and preparation of a double-layer antireflective (AR) coating, which possessed relatively high transmittance at 351, 527, and 1053 nm. The refractive indices and film thicknesses of the under layer and upper layer of the simulated AR coating were determined as 1.27, 95 nm and 1.18, 106 nm, respectively. The under layer of the double-layer coating dip-coated from a mixture of base-catalyzed and acid-catalyzed silica sols had a refractive index of 1.27. The upper layer fabricated by the deposition of methylated silica nanoparticles by simply adding methyltriethoxysilane into the base-catalyzed silica sols possessed a refractive index of 1.18. The hydrophobicity of coatings could be dramatically improved with the water contact angle increasing from 23.4° to 150.0°, and the refractive indices of the pure base-catalyzed silica coatings were easily decreased from 1.20 to 1.12 through the surface treatment of silica nanoparticles. Thus, we have successfully prepared a double-layer AR coating, which had a high transmittance of 99.8%, 96.1%, and 99.7% at 351, 527, and 1053 nm, respectively.

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Acknowledgements

This work was financially supported by the National Natural Science Foundation of China (Grant No. 61405180) and the Science and Technology Development Foundation of China Academy of Engineering Physics (Grant No. 2015B0401088).

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Authors and Affiliations

  1. Center of Laser Fusion, China Academy of Engineering Physics, Mianyang, 621900, China

    Chaoyou Tao, Ke Yang, Xinshu Zou, Hongwei Yan, Xiaodong Yuan & Lin Zhang

  2. Key Laboratory of Green Chemistry & Technology College of Chemistry, Sichuan University, Chengdu, 610064, China

    Bo Jiang

Authors
  1. Chaoyou Tao
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  2. Ke Yang
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  3. Xinshu Zou
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  4. Hongwei Yan
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  5. Xiaodong Yuan
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  6. Lin Zhang
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  7. Bo Jiang
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Corresponding author

Correspondence to Lin Zhang.

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Highlights

  • A double-layer antireflective coating possessing high transmittance was designed and prepared

  • The refractive indices of the under layer and upper layer were determined as 1.27 and 1.18

  • The hydrophobicity of coatings could be improved through surface treatment of silica nanoparticles

  • The tri-wavelength antireflective coating holds great potential for use in high-power laser systems

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Tao, C., Yang, K., Zou, X. et al. Double-layer tri-wavelength hydrophobic antireflective coatings derived from methylated silica nanoparticles and hybrid silica nanoparticles. J Sol-Gel Sci Technol 86, 285–292 (2018). https://doi.org/10.1007/s10971-018-4642-x

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  • DOI: https://doi.org/10.1007/s10971-018-4642-x

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