Charly Ou1, Chang-Sheng Wang1, Suzanne Giasson1,2
1) Department of Chemistry, Université de Montréal, C. P. 6128, Succursale Centre-ville, Montreal, QC H3C 3J7, Canada
2) Faculty of Pharmacy, Université de Montréal, C. P. 6128, Succursale Centre-ville, Montreal, QC H3C 3J7, Canada
Unprecedented quantitative assessment of the swelling behavior of surface-immobilized photothermal responsive microgels (PTRM) will be presented. Controlling the swelling behavior of thermo-responsive hydrogel using light provides an interesting non-contact way to tune surface properties. The PTRM consist of gold nanoparticles (AuNPs) embedded in thermo-responsive microgels. The dual responsive behavior of the microgels was investigated in aqueous suspensions using Dynamic Light Scattering and on surfaces using the Surface Forces Apparatus. This talk will show how the photo-induced swelling response of PTRM coatings can be enhanced compared to that in suspension. Such enhanced photo-induced swelling provides a very useful tool for the design of responsive surfaces to be used at sub-microscale such as in micro- and nano-fluidic devices.