Self-Assembly of “Paint-On” Colloidal Crystals Using Poly(styrene-co-N-isopropylacrylamide) Spheres

摘要: We report on the synthesis of monodispersed, spherical colloidal particles composed poly(styrene-co-N-isopropylacrylamide) (pS-co-NIPAm) that rapidly self-assemble via simple solvent evaporation to form 3-D crystals are both robust and uniformly diffractive. As a suspension pS-co-NIPAm dries, interactions their soft, flexible peripheries assist in particle self-assembly close-packed ordered structure. Interparticle adhesion occurs at these contacts as final amount evaporates, enhancing durability assembly. The dense core provides stability structure subsequent drying. These dried, crystalline films exhibit Bragg diffraction, which can be modified by changing size through varying monomer feed concentrations. facile drying process used for assembly presents unique approach photonic inks “paint-on” (i.e., processable) dispersions, advantageous for...