66190 - CHIMICA FISICA DELLO STATO SOLIDO M

Scheda insegnamento

Anno Accademico 2018/2019

Conoscenze e abilità da conseguire

Al termine del corso, lo studente ha conoscenze di chimica fisica dello stato solido, con particolare enfasi sulle proprietà strutturali e dinamiche del reticolo cristallino e sui metodi di studio e caratterizzazione dei materiali molecolari.

Contenuti

Classification of the states of matter. The solid crystal state. Binding in crystals. Crystal structure and unit cells; Bravais lattices. The crystal symmetry; a structural view of crystal symmetry: bottom-up crystallography in molecular crystals; mathematical representation of crystal symmetry; reciprocal lattice; Bloch functions.

The electronic structure of molecular solids in a simplified form. The band structure; model systems; DOS.

Excited states of aggregates of molecules; Davydov splitting and Mini-Excitons; linear molecular crystals; Frenkel Excitons; physical dimers; Excimers; Band structure; Charge transfer excitons (CT); Exciton processes; Energy transfer.

Dielectric theory of Frenkel excitons. the local field method; dielectric tensor of cubic crystals; dielectric tensor of organic anisotropic crystals

Vibrations in solids: lattice dynamics; classic description of vibrations of a one dimensional monatomic chain; vibrations of a one dimensional biatomic chain; acoustic and optic branches; extension to a tridimensional crystal. Vibrations in molecular crystals and quantisation of the vibrational energy: Phonons. Quasi particles.

Scattering: phonon-photon scattering and elastic and anelastic processes; X-ray diffraction; phonon-neutron scattering; phonon density of states.

Specific Heat of Solids: Boltzmann, Einstein, and Debye

Testi/Bibliografia

The Oxford Solid State Basics - Steven H. Simon Oxford University Press

Molecular Aggregation Angelo Gavezzotti - IUCR book series Oxford University Press

Organic Molecular Solids - Markus Schwoerer, Hans Christoph Wolf Wiley-VCH

Electronic Processes in Organic Semiconductors -Anna Köhler and
Heinz Bässler , Wiley-VCH

Metodi didattici

Oral Exam, with two questions and the discussion of a literature review chosen by the student.

Orario di ricevimento

Consulta il sito web di Elisabetta Venuti