منابع مشابه
Thermodynamic modeling of contact angles on rough, heterogeneous surfaces.
Theoretical modelling for contact angle hysteresis carried out to date has been mostly limited to several idealized surface configurations, either rough or heterogeneous surfaces. This paper presents a preliminary study on the thermodynamics of contact angles on rough and heterogeneous surfaces by employing the principle of minimum free energy and the concept of liquid front. Based on a two-dim...
متن کاملContact angles of surfactant solutions on heterogeneous surfaces.
Using Gibbs' adsorption equation and a literature isotherm, a new general model to predict the contact angle of surfactant solutions on (smooth or rough) chemically heterogeneous surfaces is constructed based on the Cassie equation. The model allows for adsorption at the liquid-vapor, solid-liquid, and solid-vapor interfaces. Solid-vapor adsorption is allowed in order to model the autophobic ef...
متن کاملEffect of three-phase contact line topology on dynamic contact angles on heterogeneous surfaces.
Cassie-Baxter theory has traditionally been used to study liquid drops in contact with microstructured surfaces. The Cassie-Baxter theory arises from a minimization of the global Gibbs free energy of the system but does not account for the topology of the three-phase contact line. We experimentally compare two situations differing only in the microstructure of the roughness, which causes differ...
متن کاملSilicone Brushes: Omniphobic Surfaces with Low Sliding Angles.
Losing contact: Omniphobic surfaces can be readily produced by acid-catalyzed graft polycondensation of dimethyldimethoxysilane (PDMS). Droplets show a very small contact angle hysteresis as well as a low sliding angle of only a few degrees. The nm-thick PDMS layer is neither easily washed away nor depleted. This method offers a novel approach towards the preparation of super-liquid-repelling s...
متن کاملCapillary Surfaces with Diierent Contact Angles in a Corner
__________________________________________ Capillary surfaces are of great interest to mathematicians , scientists and engineers. In particular, the behavior of liquids in microgravity is still not completely understood. While mathematical analysis is still lacking in more complex cases and experiments in microgravity are expensive, computations may be carried out in many cases and give hints o...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Nature
سال: 1981
ISSN: 0028-0836,1476-4687
DOI: 10.1038/293365b0