Surfaces and Interfaces
Provide to students specific knowledge related to the issue of surfaces and interfaces in materials.
Isabel Maria Mercês Ferreira
Weekly - 4
Total - 84
Although this discipline do not have mandatory precedence, it is recommended that students have done propedeutics disciplines of physics, mathematics and chemistry
Interfaces in Materials, Howe, James, John Wiley & Sons, 1997
Physical Chemistry of Surfaces, Adamson, Arthur, John Wiley & Sons, 1990
Physical Chemistry, Atkins, P.W., (6th Edition), Oxford, 1998
The lectures involve exposing the material through powerpoint, practical lessons solving problem alternate with labs.
The evaluation is done through two tests for final exam exemption with the following three conditions:
1) Final mark resulting from the arithmetic average of the marks obtained in the two tests and the marks in the reports of the practical work.
2) Minimum mark in any of the tests: 6.0 points.
3) Minimum grade for final exam exemption: 9,5 points.
a) test/examl on the solid soubility part
b) test/exam on surfaces and interfaces
c) reports and practical works
Frequency attributed by the practical works (positive note on the reports and assiduity on all works)
Final mark = 50% (a)+ 50%[A], with A= 50% (b)+ 50% (c))
Surfaces and interfaces. Classification of interfaces and interfacial tension or surface tension. Capillarity; Contact liquid / solid. Wettability. Contact angle, gas-solid adsorption. BET equation. Specific area of solids; roughness. Solid-solid friction. Wear; solid surfaces. Coordination and atomic energy surface. Effect of orientation on the structure and energy. Anisotropy of surface tension. Faceting. Thermodynamics of interfaces. Gibbs-Duhem equation. Gibbs equation. Concentration of excess. Adsorption positive and negative. Effect on surface tension. Surfactants. Segregation.