Photonic multilayers were prepared by sequential spin-coating, crosslinking and developing of polymer films as previously reported. Glass substrates were first cleaned by sonication for 10 min each in acetone, ethanol and water followed by surface treatment with methacryloxypropyl trichlorosilane (Gelest) to promote substrate-polymer adhesion. Flexible Mylar substrates (McMaster-Carr) were used as received and cleaned by rinsing with water, acetone and ethanol. P(p-MS-BP) and P(OEGMA-BP) were cast from toluene, while P(MMA-BP) was cast from cyclohexanone. Developing solutions for the three respective copolymers were 1:0.65 toluene:hexanes, 1:0.53 toluene:hexanes, and chloroform. Polymer films were crosslinked using a Newport 365 nm UV light source, with a typical dose of approximately 80J/cm2, which