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Block Copolymer Nanostructures for Technology
Polymers 2010, 2(4), 490-504; doi:10.3390/polym2040490
Article

Enhanced Photophysical Properties of Nanopatterned Titania Nanodots/Nanowires upon Hybridization with Silica via Block Copolymer Templated Sol-Gel Process

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Received: 28 September 2010; in revised form: 18 October 2010 / Accepted: 21 October 2010 / Published: 25 October 2010
(This article belongs to the Special Issue Nano-Structures of Block Copolymers)
Download PDF [1786 KB, updated 1 December 2010; original version uploaded 25 October 2010]
Abstract: We fabricated titanium dioxide (TiO2)-silica (SiO2) nanocomposite structures with controlled morphology by a simple synthetic approach using cooperative sol-gel chemistry and block copolymer (BCP) self-assembly. Mixed TiO2-SiO2 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 TiO2-SiO2 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.
Keywords: hybrid TiO2-SiO2; poly(styrene-block-ethyleneoxide); sol-gel; nanopattern; photocatalyst hybrid TiO2-SiO2; poly(styrene-block-ethyleneoxide); sol-gel; nanopattern; photocatalyst
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Kannaiyan, D.; Kochuveedu, S.T.; Jang, Y.H.; Jang, Y.J.; Lee, J.Y.; Lee, J.; Lee, J.; Kim, J.; Kim, D.H. Enhanced Photophysical Properties of Nanopatterned Titania Nanodots/Nanowires upon Hybridization with Silica via Block Copolymer Templated Sol-Gel Process. Polymers 2010, 2, 490-504.

AMA Style

Kannaiyan D, Kochuveedu ST, Jang YH, Jang YJ, Lee JY, Lee J, Lee J, Kim J, Kim DH. Enhanced Photophysical Properties of Nanopatterned Titania Nanodots/Nanowires upon Hybridization with Silica via Block Copolymer Templated Sol-Gel Process. Polymers. 2010; 2(4):490-504.

Chicago/Turabian Style

Kannaiyan, Dinakaran; Kochuveedu, Saji Thomas; Jang, Yoon Hee; Jang, Yu Jin; Lee, Ji Yong; Lee, Jieun; Lee, Juyon; Kim, Jooyong; Kim, Dong Ha. 2010. "Enhanced Photophysical Properties of Nanopatterned Titania Nanodots/Nanowires upon Hybridization with Silica via Block Copolymer Templated Sol-Gel Process." Polymers 2, no. 4: 490-504.


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