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The Effects of Composition, Solvent Selectivity, and Additive on the Morphology of Hybrid Nano Thin Films Composed of Self-Assembled Block Copolymer and Titanium Dioxide  

Jang, Yoon-Hee (Department of Chemistry and Nano Science, Ewha Womans University)
Cha, Min-Ah (Department of Chemistry and Nano Science, Ewha Womans University)
Kim, Dong-Ha (Department of Chemistry and Nano Science, Ewha Womans University)
Publication Information
Polymer(Korea) / v.32, no.5, 2008 , pp. 465-469 More about this Journal
Abstract
Hybrid thin films composed of block copolymer(BCP) and $TiO_2$ with various morphologies on the nanoscale were fabricated using self-assembly of block copolymer combined with sol-gel process. The factors governing morphology changes considered in this study are block copolymer composition, selectivity of solvent and the inclusion of an additive. We also investigated the efficiency of photoluminescence for selected films with different morphologies. Micelle or nanowire structure can be derived from the self-assembly of poly (styrene-block-4-vinyl pyridine) (PS-b-P4VP) depending on the relative selectivity of the solvent for the two blocks, and the titanium tetraisopropoxide ($Ti{OCH (CH_3)_2}_4$, TTIP) is coordinated with nitrogen in P4VP block. Addition of a third component 3-pentadecylphenol into the BCP/sol-gel mixture solution induces morphology change as a result of the change of relative volume fraction of the BCP. We confirmed that the efficiency of $TiO_2$ fluorescence changes for films depending on morphologies.
Keywords
block copolymer; poly (styrene-block-4-vinyl pyridine); $TiO_2$; sol-gel; fluorescence;
Citations & Related Records
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