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Enhanced photophysical properties of nanopatterned titania nanodots/nanowires upon hybridization with silica via block copolymer templated sol-gel process

Title
Enhanced photophysical properties of nanopatterned titania nanodots/nanowires upon hybridization with silica via block copolymer templated sol-gel process
Authors
Kannaiyan D.Kochuveedu S.T.Jang Y.H.Jang Y.J.Lee J.Y.Lee J.Kim J.Kim D.H.
Ewha Authors
김동하
SCOPUS Author ID
김동하scopus
Issue Date
2010
Journal Title
Polymers
ISSN
2073-4360JCR Link
Citation
vol. 2, no. 4, pp. 490 - 504
Indexed
SCIE; SCOPUS WOS scopus
Abstract
We fabricated titanium dioxide (TiO 2)-silica (SiO 2) nanocomposite structures with controlled morphology by a simple synthetic approach using cooperative sol-gel chemistry and block copolymer (BCP) self-assembly. Mixed TiO 2-SiO 2 sol-gel precursors were blended with amphiphilic poly(styrene-block-ethylene oxide) (PS-b-PEO) BCPs where the precursors were selectively incorporated into the hydrophilic PEO domains. Changing the volumetric ratio of TiO 2-SiO 2 sol-gel precursor from 5% to 20%, a stepwise structural inversion occurred from nanodot arrays to discrete nanowires. Template free hybrid inorganic nanostructures were produced after the removal of PS-b-PEO by irradiation of UV light. The morphological evolution and photophysical properties were investigated by microscopic studies, UV-visible absorption and photocatalytic properties. © 2010 by the authors.
DOI
10.3390/polym2040490
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자연과학대학 > 화학·나노과학전공 > Journal papers
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