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Related Experiment Video

Updated: Jan 8, 2026

Selective Area Modification of Silicon Surface Wettability by Pulsed UV Laser Irradiation in Liquid Environment
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Tailoring surface wettability through laser speckle patterning.

Junkun Mao, Bin Xie, Changping Yuan

    Optics Express
    |December 19, 2025
    PubMed
    Summary
    This summary is machine-generated.

    Researchers enhanced surface hydrophobicity using laser speckle grayscale lithography and soft embossing on polydimethylsiloxane (PDMS). This cost-effective method created microstructures, significantly increasing water contact angles for improved self-cleaning properties.

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    Area of Science:

    • Materials Science
    • Surface Science
    • Nanotechnology

    Background:

    • Surface hydrophobicity is vital for applications like self-cleaning, antifouling, and corrosion resistance.
    • Controlling surface morphology is key to tailoring material wettability.

    Purpose of the Study:

    • To develop a simple and cost-effective method for enhancing surface hydrophobicity.
    • To investigate the relationship between laser speckle grayscale lithography, soft embossing, and surface wettability.

    Main Methods:

    • Fabrication of microstructures on polydimethylsiloxane (PDMS) using laser speckle grayscale lithography combined with soft embossing.
    • Systematic adjustment of exposure dose and laser speckle size to control surface morphology.
    • Measurement of water contact angles to quantify changes in surface wettability.

    Main Results:

    • Patterned PDMS surfaces exhibited significantly increased water contact angles (up to 144.2°) compared to the intrinsic PDMS contact angle (100.6°).
    • Surface morphology and wettability were controllably altered by adjusting lithography parameters.
    • The fabricated microstructures enhanced surface hydrophobicity without requiring any post-treatment.

    Conclusions:

    • Laser speckle grayscale lithography and soft embossing provide an effective route for fabricating superhydrophobic surfaces.
    • This technique offers a scalable and economical approach for enhancing material surface properties.
    • The developed method has potential applications in coatings, microfluidics, and anti-fouling technologies.