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Wetting characterisation on complex surfaces by an automatic open-source tool: DropenVideo
Raziyeh Akbari1, Federico Ambrosio1, Joseph D Berry2
1Department of Materials Science, University of Milano-Bicocca, via R. Cozzi 55, 20125 Milano, Italy.
Journal of Colloid and Interface Science
|September 5, 2024
Summary
This study introduces DropenVideo, an open-source software for automated contact angle measurement. It enhances precision and reduces bias in analyzing solid-liquid interactions for material wetting properties.
Area of Science:
- Surface Science
- Materials Science
- Physical Chemistry
Background:
- Understanding solid-liquid interactions is key to material wetting.
- Contact angle hysteresis is a critical parameter for wetting properties.
- Automated, user-independent tools are needed for accurate contact angle measurements.
Purpose of the Study:
- Introduce DropenVideo, an open-source software for automated contact angle analysis.
- To standardize and automate the measurement of advancing and receding contact angles.
- To mitigate subjective bias in wetting measurements.
Main Methods:
- DropenVideo performs frame-by-frame video analysis for contact angle determination.
- It incorporates needle detection, contrast tuning, and data gap compensation.
- Contact angles are calculated using convolution mask, circle, and polynomial fittings.
Main Results:
- DropenVideo automatically identifies advancing and receding contact angles.
- Advancing angles are averaged during drop inflation; receding angles from incipient motion during deflation.
- Application across complex surfaces demonstrates enhanced precision and reduced subjective bias.
Conclusions:
- DropenVideo offers a reliable, automated, and open-source solution for contact angle hysteresis measurement.
- The software improves the precision of wetting characteristic identification.
- It addresses challenges in interpreting wetting measurements on diverse surfaces.
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