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Block Copolymer Photonic Crystals
(Cont.) Etching of the isoprene matrix is demonstrated yielding a free standing air-styrene double gyroid. This material is then used to replicate the matrix geometry in titania by infiltration with a sol-gel precursor and subsequent pyrolysis. The structure of the double gyroid material is examined via x-ray scattering and electron microscopy. The photonic band properties of the double gyroid structure for multiple constituent materials with a broad range of refractive indices are examined. Features in optical measurements resulting from the double gyroid structure are observed consistent with the 250nm cubic lattice parameter. A block copolymer photonic crystal platform is outlined and presented. Acousto-optic, phononic crystal properties are noted in these materials and applications are discussed. Strategies for creating a block copolymer based material with an absolute band gap ...
To Heal a Nation
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