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Ring Wrinkle Patterns with Continuously Changing Wavelength Produced Using a Controlled-Gradient Light Field.

Hongye Li1, Bin Sheng2, He Wu3

  • 1Engineering Research Center of Optical Instruments and Systems, Ministry of Education and Shanghai Key Laboratory of Modern Optical Systems, University of Shanghai for Science and Technology, Shanghai 200093, China. 167710556@st.usst.edu.cn.

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Summary
This summary is machine-generated.

Researchers developed a simple method to create gradient wrinkles with varying wavelengths using controlled light fields and UV/ozone treatment on polydimethylsiloxane (PDMS). This technique offers potential applications in fluid handling, biological templates, and optical devices.

Keywords:
UV/ozonegradient wrinklesirradiance

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Area of Science:

  • Materials Science
  • Surface Engineering
  • Nanotechnology

Background:

  • Surface wrinkling is a common phenomenon in thin films on compliant substrates.
  • Controlled fabrication of wrinkles with specific wavelengths is crucial for advanced applications.

Purpose of the Study:

  • To develop a facile method for preparing gradient wrinkles with continuously changing wavelengths.
  • To explore the relationship between fabrication parameters and wrinkle characteristics.

Main Methods:

  • Utilized a controlled-gradient light field for ultraviolet (UV)/ozone treatment of polydimethylsiloxane (PDMS) substrates.
  • Varied the distance between the UV lamp and the PDMS substrate to control irradiance and SiOx film thickness.
  • Fabricated 1-D wrinkle patterns and ring wrinkles with gradient wavelengths.

Main Results:

  • Demonstrated that gradient wrinkles with continuously changing wavelengths can be fabricated.
  • Observed an inverse relationship between substrate distance and wrinkle wavelength (wavelength decreased as distance increased).
  • Successfully created both 1-D and ring-shaped gradient wrinkles.

Conclusions:

  • The developed method provides a straightforward approach to producing gradient wrinkles.
  • The gradient wrinkles exhibit tunable wavelengths, making them suitable for various technological applications.
  • Potential applications include fluid handling systems, biological templates, and optical devices.