Thermo/Light Responsive Hybrid Microgel for Modulation of Surface Properties

Endroit : Pavillon Claire McNicoll, salle Z-209  à 11 h 30

Cette conférence sera prononcée par Monsieur Charly Ou, candidat au doctorat, étudiant de la Professeure Suzanne Giasson, au département de chimie, de l'Université de Montréal.

RÉSUMÉ:

Recent advances in stimuli-responsive materials enable their integration as functional surface elements in nanotechnologies such as microfluidics and Micro Electro-Mechanical Systems (MEMS) where surface forces strongly influence the device performance because of the large surface-to-volume ratio. However, responsive coatings are suffering from major shortcomings such as lack of responsiveness selectivity and reversibility which are critical to design reliable rules for building multifunctional surfaces.

We report the preparation of responsive nanocomposites by incorporation of plasmonic gold nanoparticles in thermo-responsive microgels based on poly(N-isopropylacrylamide) (polyNIPAM) microgels. Combined together, these materials could lead to thermo-responsive materials which physical properties can be tuned by light irradiation. These hybrid microgels could be used to prepare a new generation of valved which could be used to control fluid flows in microfluidics.

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