Chinese Optics Letters, Volume. 20, Issue 4, 043801(2022)

Femtosecond-laser-induced backward transfer of fluorinated ethylene propylene for fabrication of “lotus effect” surfaces

Kongyu Lou1,2, Jing Qian1,2, Xiaohan Yu1,3, Zhaoyuan Xia1,2, Danyang Shen1,2, Guande Wang1,2, and Quan-Zhong Zhao1,2、*
Author Affiliations
  • 1State Key Laboratory of High Field Laser Physics and CAS Center for Excellence in Ultra-intense Laser Science, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
  • 2Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
  • 3MOE Key Laboratory of Advanced Micro-Structured Materials, School of Physics Science and Engineering, Tongji University, Shanghai 200092, China
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    Figures & Tables(6)
    (a) Schematic diagram of LIBT process; the side view of a 5 µL pure water droplet on the glass surface (b) before and (c) after the LIBT process; (d) the surface repelled a 5 µL droplet (laser power: 0.8 W; scanning interval: 10 µm). The green arrows represent the moving direction of the needle.
    Dependence of CAs on laser power at scanning intervals of (a) 10 µm, (b) 30 µm, (c) 50 µm, and (d) 70 µm (water droplet: 5 µL).
    Evolution of morphology and wetting ability of glass surface treated by the LIBT process with varied laser power and scanning intervals. Insets: SEM images with higher magnifications and snapshots of 5 µL water droplet on the glass surface along parallel (upper) and perpendicular (bottom) directions.
    (a) XPS analysis of the initial glass, pristine FEP, and the glass surfaces after the LIBT process at varied laser powers; curve fittings of C 1s peak for (b) pristine FEP and treated glass surfaces at the laser power of (c) 0.5 W and (d) 3 W.
    (a)–(c) Schematic illustrations of wetting states at different intervals. Top view of a water droplet on glass surface after LIBT process at (d) small and (g) large intervals; side view of water diffusion on glass surface in the direction (e), (h) parallel and (f), (i) perpendicular to scanning lines (HEB, high-energy barriers; LEB, low-energy barriers).
    • Table 1. Curve Fittings of C 1s Peak (in atomic fraction, %) for FEP and Glass Surface Treated by LIBT Process

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      Table 1. Curve Fittings of C 1s Peak (in atomic fraction, %) for FEP and Glass Surface Treated by LIBT Process

       Binding Energy (eV)AssignmentFraction (%)
      FEP292(C*F2CF2)n81.6
      290.5(C*F2CH2)n10.63
      293.9C*F38.21
      292(C*F2CF2)n42.46
      0.5 W291.5CFOC*F233.55
      293.7C*F39.01
      284.8CC4.43
      290C*F4.3
      286.77(CF2C*H2)n3.41
      288.8C=O2.85
      3 W291.5CFOC*F276.53
      293.2C*F38.59
      284.8CC6.08
      286.77(CF2C*H2)n3.09
      289.7C*FCF2CF32.8
      288.8C=O2.91
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    Kongyu Lou, Jing Qian, Xiaohan Yu, Zhaoyuan Xia, Danyang Shen, Guande Wang, Quan-Zhong Zhao. Femtosecond-laser-induced backward transfer of fluorinated ethylene propylene for fabrication of “lotus effect” surfaces[J]. Chinese Optics Letters, 2022, 20(4): 043801

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    Paper Information

    Category: Light-matter Interaction

    Received: Nov. 15, 2021

    Accepted: Jan. 18, 2022

    Published Online: Feb. 25, 2022

    The Author Email: Quan-Zhong Zhao (zqz@siom.ac.cn)

    DOI:10.3788/COL202220.043801

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