During the course «Physics of surfaces and nanostructures” the students are expected to:
1. Understand the differences in the electronic properties of bulk materials, surfaces and nanoparticles
2. To get acquainted with the modern methods of growth and characterization of surfaces, thin films and nanostructures
3. . To become familiar with the methods of fabrication of nanostructures
4. . To bridge theory with practice using examples from the international literature
Course Content (Syllabus)
Section 1 (2 hrs): Introduction to surfaces and nanostructures, the important differences from bulk materials.
Section 2 (4 hrs): Thermodynamics and electronic properties of surfaces: energy cost for the creation of a free surface, surface tension and surface energy, surface reconstruction, work function, electron affinity, surface states.
Section 3 (3 hrs): Vacuum conditions for the growth and characterization of clean surfaces and nanostructures. Basics of ultra high vacuum and kinetic theory of gases, conductivity of vacuum systems, pumping and vacuum measurement systems.
Section 4 (4 hrs ): Physisorption and chemisorption, initial stages of growth of thin films and nanostructures.
Section 5 (6 hrs): Epitaxial growth of thin films and nanostructures (molecular beam epitaxy, chemical vapor deposition and their modifications)
Section 6 (10 hrs) : Methods for the characterization of thin films and nanostructures: chemical composition (AES, XPS, SIMS, micro-XRF), surface structure and monitoring of the atomic layer-by-layer growth of epitaxial layers (LEED, RHEED), synchrotron radiation and the non-destructive identification of the nanostructure (EXAFS & SEXAFS) and electronic structure (NEXAFS, UPS, ARUPS).
Section 7 (6 hrs): Photolithography and current trends for the top-down fabrication of nanostructures. Principles of bottom-up approach for the fabrication of nanostructures.
Section 8 (4 hrs): Introduction to diffusion and oxidation of surfaces.
All sections include exercises and/or critical review of publications from the international literature.
surfaces, thin films, nanostructures, nucleation, growth methods, materials characterization, UHV, lithography
Additional bibliography for study
1. Σημειώσεις του μαθήματος που διατίθενται ηλεκτρονικά (http://users.auth.gr/~paloura)
2. Διαφάνειες του μαθήματος που διατίθενται (http://users.auth.gr/~paloura)
3. “Introduction to surface and thin film processes” John A. Venables, Cambridge University Press
4. “Materials Science and Thin Films” Milton Ohring, Academic Press
5. “Physics at Surfaces” Andrew Zangwill, Cambridge University Press
6. “Solid Surfaces, Interfaces and Thin Films”, H. Lüth, Springer