The cleanness and the surface chemical composition on pure semiconductor surfaces and treated surfaces like nitrides, oxides are correlated to the surface energy of these surfaces. Therefore, the measurement of contact angles is a simple and fast method for quality control in this field. The contact angle is an important parameter for the cleaning process of shampoos and for the effectiveness of cleaning solutions. Surface tension as well as is a parameter for the effectiveness of surfactant solutions. Furthermore, it is necessary for the development of time and temperature-stable emulsions for various cosmetic products.
Titanium Dioxide is used as a sun blocker in sun tan creams.
The development of a stable, ultra-fine dispersion of Titanium Dioxide in the sun tan emulsion can be simplified by measuring the surface free energy of the particles to be suspended and the surface tension of the liquid carrier. Wetting of plant surfaces by pesticides and fungicides is very important in determining the effectiveness of the pesticide and fungicide formulations. Interaction of plant leaf and acid rain is important to know for protecting valuable corps. Critical surface tension of cell surfaces and bacteria to implants or drug surfaces needed to be identified for curing disease or for an artificial organ implantation. Development of stable emulsions for paint s storage shelf life also involve the interfacial tension between the particle and carrier in the paint formulation.