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.

Akbari, R., Antonini, C. (2021). Contact angle measurements: From existing methods to an open-source tool. ADVANCES IN COLLOID AND INTERFACE SCIENCE, 294(August 2021) [10.1016/j.cis.2021.102470].

Contact angle measurements: From existing methods to an open-source tool

Akbari R.
Primo
;
Antonini C.
Ultimo
2021

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.
Articolo in rivista - Review Essay
Contact angle; Dropen; Image analysis; MATLAB; Open-source; Wetting;
English
22-giu-2021
2021
294
August 2021
102470
reserved
Akbari, R., Antonini, C. (2021). Contact angle measurements: From existing methods to an open-source tool. ADVANCES IN COLLOID AND INTERFACE SCIENCE, 294(August 2021) [10.1016/j.cis.2021.102470].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/333460
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