Na próxima segunda-feira,12/04, no horário das 16h, teremos o WEB-Colóquio de título "Relaxation, crystal nucleation and Kauzmann temperature in supercooled zinc selenide", a ser apresentado pela Dr.ª Leila Separdar, do Departamento de Física, da UFSCar - Universidade Federal de São Carlos.
"The liquid to crystal transition is a ubiquitous phenomenon, which is a very important scientific and technological subject in diverse fields, such as biology, mineral formation, semiconducting materials, water and metal solidification, glass-ceramics and glass formation. Due to its substantial scientific and technological relevance, understanding and describing the relaxation, crystallization mechanisms and kinetics of liquids during cooling process is relevant, fascinating and challenging. Structural relaxation is a key phenomenon that plays a significant role on vitrification and crystallization. If a liquid is deeply supercooled without vitrifying or crystallizing, a particularly intriguing possibility is that it could reach the isentropic temperature, TK, predicted by Kauzmann, at which the difference between the entropy of the supercooled liquid (SCL) and its isochemical crystal (excess entropy) vanishes, known as the Kauzmann paradox. The main question is: what is the ultimate fate of supercooling? If the ultimate fate of cooling a supercooled be crystallization how this crystallization occurs? In this talk, first I will provide an overview of the field and the most well-known theory in this field, the Classical Nucleation Theory. Then I will present the results obtained from molecular dynamics simulation, with focusing on thermodynamic and kinetic properties such as the Kauzmann temperature, TK (where the excess entropy tends to zero), the kinetic spinodal temperature, Tks (where the relaxation and crystal nucleation curves cross), the glass transition temperature, Tg spontaneous and seeded nucleation and theoretical calculations based on the Classical Nucleation Theory in model system zinc selenide." ( Dr.ª Leila Separdar)
A transmissão será online por meio da da sala virtual do Google Meet mediante o link: https://meet.google.com/pog-tdji-xqp.
Contamos com a presença de todos!
Sala virtual do Google Meet (LINK) -