Contact angle measurements under thermodynamic equilibrium conditions

Lages, Carol; Méndez, Eduardo
August 2007
Analytical & Bioanalytical Chemistry;Aug2007, Vol. 388 Issue 8, p1689
Academic Journal
The precise control of the ambient humidity during contact angle measurements is needed to obtain stable and valid data. For a such purpose, a simple low-cost device was designed, and several modified surfaces relevant to biosensor design were studied. Static contact angle values for these surfaces are lower than advancing contact angles published for ambient conditions, indicating that thermodynamic equilibrium conditions are needed to avoid drop evaporation during the measurements.


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