My electrodes should facilitate a good wettability (degree of wetting which is the ability of a liquid to maintain contact with a solid surface). But, how to measure it experimentally?
Hello, you can test for wettability by contact angle measurement. A Kruss contact angle metre or goniometer can be used for the purpose and the method of falling drop method can be followed.
If you start using contact angle analysis I suggest reading articles of Drelich, Bromashenko, Della Volpe or ourselves (especially if you want to perform analysis of dynamic data).
A setup for sessile drop experiments can also a self-made solution (constant and controlled atmosphere/temperature is often problematic using the purchaseable equipment.).
https://www.researchgate.net/profile/Jaroslaw_Drelich
https://www.researchgate.net/profile/Edward_Bormashenko
Article Use, Abuse, Misuse and Proper Use of Contact Angles: A Critical Review
Article Detailed statistical contact angle analyses; “slow moving” d...
Wettability can be studied by two methods:
1. Contact angle method - A droplet containing electrolyte is allowed to fall on any desired surface and the contact angle is measured by the sessile drop system. This can be studied as a function of time, concentration and temperature also.
2. Zeta potential measurement - In this method, the zeta potential of an electrolyte solution consisting of powders (suspensions) of desired solid is measured. Higher the zeta value (positive or negative), greater is the system stability of the electrolyte-induced suspension. Also, the mobility of the ions can be calculated in this method, if the dielectric constant of solution/suspension is known.
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