One-step fabrication of hierarchically ordered structures on photoresponsive azobenzene-containing polymers with phase masks

Hierarchically ordered structures are fabricated by laser irradiation on azobenzene-containing polymers through PDMS phase masks. The longer and shorter length scale structures of the hierarchical structures are interference patterns and self-organized nanostructures, respectively. The hierarchical structures are tunable by using different masks or changing the polarization of the laser.