Dr. Silvina Gatica
Wednesday April 21, 3:30 PM
Thirkield Hall (Physics), room 103
and molecules are trapped in nano-porous materials or on
nano-structured surfaces by weak physical adsorption, i.e. without
bonds being formed. These atoms form phases of matter that are unique
and sometimes commensurate with the host substrate.
In this talk I will discuss the thermal and structural properties of trapped matter. For example, atoms inside bundles of nanotubes condense at a lower temperature than in bulk; xenon on top of a 2D C60 array condenses at a very low temperature to commensurate 2D lattice; helium-3 can form a 1D or 2D bound state with help from the substrate while such a fluid does not condense if the substrate is rigid. The effective-dimensionality of these systems is non trivial. For example, atoms adsorbed on a 1D-channel behave as 1D, 2D…11/2D, depending on the temperature.
Refreshments will be served at 3:15 PM.