Physical Chemistry

Lund University

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Jasper Immink: Crystals, glasses and gels in binary mixtures of soft thermoresponsive particles


From: 2017-10-09 14:15 To: 15:00
Place: Kemicentrum, Lecture hall F

A seminar by PhD Student Jasper Immink, Physical Chemistry, Lund University.



Thermoresponsive colloidal microgels have frequently been studied in order to probe their tunable interaction potentials and their easily manipulatable phase behaviour. The thermoresponsivity of these microgels allows for facile manipulation of their size and for switching between attractive and soft repulsive interaction potentials. This leads to an interesting phase behaviour comprising crystals, glasses, gels and fluids. Here we now extend the study to binary mixtures, using particles with different sizes and transition temperature, and investigate the effects of the size ratio, volume fraction, and specific interaction potential on the phase behaviour and the resulting structural and flow properties. We profit from the fact that these parameters can all be precisely tuned through temperature as an external control parameter, which allows us to probe binary crystal formation and percolating gels, and the relevant phase transitions.