Seminarium Fizyki Materii Skondensowanej

The talk concerns experimental and numerical investigations ofdiffusion coefficients and structure factors of charge stabilizedcolloidal suspensions. Regarding high monodispersity and relatively highcharge, silica spheres od 170 nm diameter suspended in dimethylformamid(DMF) have been chosen for the study. Additional inspiration lied inrecent reports on unusual behavior of similar colloids in low ionicstrength conditions. In the end I will present results of freezing linescalculations for silica colloids obtained by means of solvingOrnstein-Zernicke equation with some constraints put upon the height ofthe structure factor principal peak height. This activity, unusual for anexperimentalist, was dictated by the need for creating a tool useful inplanning studies of colloids in the way being as attractive as possiblefor this purpose. Methods based on optical microscopes with laser beamswill be mentioned as plans for future.