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18 paź 2024 · The formula for surface energy is: γ= W A γ = W A. Where: – γ is the surface energy. – W is the work or energy required to create a new surface. – A is the area of the newly created surface. This formula shows that surface energy is the amount of energy required to create a unit area of a new surface. It is a measure of the energy ...
In surface science, surface energy (also interfacial free energy or surface free energy) quantifies the disruption of intermolecular bonds that occurs when a surface is created.
Surface tension is a tension force per length acting in all directions along the surface, and its common units are mN/m or dyn/cm. SFE is interpreted as the energy required to create new surface area, and its common units are mJ/m 2 (equivalent to mN/m).
\( \gamma \) is the increment of Gibbs free energy with the increasing of surface area per unit square at CTCP, called specific surface free energy (SSFE), and it is also called surface free energy (SFE).
Surface free energy is a measure of the excess energy present at the surface of a material, in comparison to at its bulk. It can be used to describe wetting and adhesion between materials, but is not often used quantitatively.
The energy required to increase the surface area is referred to as the free surface energy or surface free energy γ. Not surprisingly its unit is energy per area, i.e., J m − 2, as it defines the amount of energy required in order to create a certain surface area.
In equation (1), the surface free energy of the solid is described by using the contant angle θY, surface tension of the liquid γ. lv. and interfacial tension between solid and liquid γsl. The first two are easily measured but the problem is the unknown γ which. sl. cannot be measured directly.
