Document Type thesis Author Name Osborne III, Kenneth L URN etd-062909-113303 Title Temperature-Dependence of the Contact Angle of Water on Graphite, Silicon, and Gold Degree MS Department Physics Advisors Dr. Rafael Garcia, Advisor Dr. Stephan A. Koehler, Graduate Committee Rep Dr. Alex A. Zozulya, Graduate Committee Rep Keywords wetting transitions water gold graphite silicon contact angle matlab Date of Presentation/Defense 2009-04-23 Availability unrestricted
The temperature dependence of the contact angle of water on graphite, silicon and gold was investigated under various conditions to test the Sharp-Kink Approximation. Despite correctly predicting the contact angle at room temperature, the ideal Sharp-Kink Approximation was not found to accurately describe the contact angle's temperature dependence. The discrepancies from the predicted contact angle were characterized in terms of a correction H(T) to the liquid-solid surface tension. H(T) was found to be linear in temperature and decreasing, and is consistent with electrostatic charge effects.
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