Inverse gold photonic crystals and conjugated polymer coated opals for functional materials

Autor: Yi-Chieh Wu, Jessica Gillespie, Robert Glosser, Rajiv Giridharagopal, Sergey Lee, Behzad Karimi, John P. Ferraris, Geoffrey Ussery, Jose J. Gutierrez, Itzel Lucio Martinez, Anvar A. Zakhidov, Preston B. Landon, Ray H. Baughman, Kunjal Parikh
Rok vydání: 2003
Předmět:
Zdroj: Physica B: Condensed Matter. 338:165-170
ISSN: 0921-4526
DOI: 10.1016/s0921-4526(03)00480-0
Popis: Inverse gold photonic crystals templated from synthetic opals with a face centered cubic (FCC) crystal lattice were constructed by heat converting gold chloride to metallic gold. Tetrahedral formations constructed of alternating large and small octahedrons oriented in the zinc sulfide structure were created by controlling the infiltration of gold chloride. Silica spheres were coated with polyanilinesulfonic acid, polypyrrole, poly[2-methoxy-5-(2′-ethylhexyloxy)-1,4-phenylenevinylene] (MEH-PPV) and 5 nm colloidal gold. Ordinary yeast cells were coated with polyanilinesulfonic acid, polypyrrole and 5 nm colloidal gold. Spheres coated with MEH-PPV were dispersed in H2O and coated with polyelectrolytes which recharged and sterically stabilized the colloidal surfaces. The recharged spheres self-assembled by sedimentation with a FCC crystalline lattice possessing 500 μm wide and 1 mm long crystallites. Silica spheres with diameters as large as 1500 μm were self-assembled along the [1 0 0] direction of the FCC crystal lattice. Opals infiltrated with gold and opals constructed from polymer coated spheres were co-infiltrated with polypropylene yielding inverse polypropylene composite photonic crystals.
Databáze: OpenAIRE
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