%0 Journal Article
%T Enhanced Photophysical Properties of Nanopatterned Titania Nanodots/Nanowires upon Hybridization with Silica via Block Copolymer Templated Sol-Gel Process
%A Dinakaran Kannaiyan
%A Saji Thomas Kochuveedu
%A Yoon Hee Jang
%A Yu Jin Jang
%A Ji Yong Lee
%A Jieun Lee
%A Juyon Lee
%A Jooyong Kim
%A Dong Ha Kim
%J Polymers
%D 2010
%I MDPI AG
%R 10.3390/polym2040490
%X 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.
%K hybrid TiO2-SiO2
%K poly(styrene-block-ethyleneoxide)
%K sol-gel
%K nanopattern
%K photocatalyst
%U http://www.mdpi.com/2073-4360/2/4/490