Speaker: Prof. Emiliano Descrovi (Dipartimento di Scienza Applicata e Tecnologia, Politecnico di Torino, Torino, Italy)

Abstract: Some opportunities of using light-responsive polymeric architectures in optics-related applications will be presented, including the biological domain. Several strategies will be shown, aiming at advancing the synthesis and fabrication technology for 2D/3D patterning of functional light-responsive polymers in the form of biocompatible resins, and elastomers exhibiting reversible mechanical variations (e.g. in morphology) when properly irradiated.

In the context of biological applications, light-responsive smart substrates are introduced to perturb growth and migration of living cells. It is known that cell-substrate interactions modulate cell behavior and can induce significant phenotypic changes. Here, an operative platform for implementing a light-driven, real-time perturbation of small to medium sized cancer cell colonies seeded on light-responsive substrates is presented.

On a larger scale, a new type of light-responsive nanocomposite is presented, whose mechanical deformation is fully driven by the polarization of an incident radiation. A millimeter-sized membrane actuator made of this amorphous material is demonstrated to be actuatable in any arbitrary direction, as ruled by the polarization state of the illumination.