1. Contact angle measurements: From existing methods to an open-source tool
- Author
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Raziyeh Akbari, Carlo Antonini, Akbari, R, and Antonini, C
- Subjects
Engineering drawing ,Polynomial ,MATLAB ,Open-source ,Computer science ,Wetting ,02 engineering and technology ,010402 general chemistry ,01 natural sciences ,Contact angle ,Digital image ,Colloid and Surface Chemistry ,Software ,Code (cryptography) ,Dropen ,Physical and Theoretical Chemistry ,computer.programming_language ,business.industry ,Process (computing) ,Surfaces and Interfaces ,021001 nanoscience & nanotechnology ,0104 chemical sciences ,Identification (information) ,Image analysi ,0210 nano-technology ,business ,computer - Abstract
Contact angle measurement is an effective way to investigate solid surface properties. The introduction of low-cost digital cameras, as well as software and libraries for image analysis, has made contact angle measurement potentially accessible to every laboratory. In this review, we provide a comparison of the main methods developed to evaluate contact angle from digital images, including the so-called Young-Laplace method, the circle and polynomial fittings, as well as the mask method. All methods have been implemented and compared analyzing virtual and real drop images in an open-source software, Dropen, developed as an app in MATLAB environment. The code enables single image analysis evaluation, for the robust automatic identification of the contact points and contact angle evaluation, with the goal of minimizing user inputs, automatizing the process and facilitating measurements for all users, from less experienced to advanced wetting experts. Dropen and its code are made available at BOA, the Bicocca Open Access public repository, for use and further development.
- Published
- 2021