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On the synergistic coupling properties of composite CdS/TiO2 nanoparticle arrays confined in nanopatterned hybrid thin films

Title
On the synergistic coupling properties of composite CdS/TiO2 nanoparticle arrays confined in nanopatterned hybrid thin films
Authors
Kannaiyan D.Kim E.Won N.Kim K.W.Jang Y.H.Cha M.-A.Ryu D.Y.Kim S.Kim D.H.
Ewha Authors
김동하
SCOPUS Author ID
김동하scopus
Issue Date
2010
Journal Title
Journal of Materials Chemistry
ISSN
0959-9428JCR Link
Citation
vol. 20, no. 4, pp. 677 - 682
Indexed
SCOPUS WOS scopus
Abstract
Two-dimensional (2D) arrays of hybrid CdS/TiO2 composite nanodots were fabricated on solid substrates using amphiphilic poly(styrene-block-ethylene oxide) diblock copolymer (PS-b-PEO) micelles as templates loaded with CdS nanoparticles (NPs) and TiO2 sol-gel precursors. The inorganic precursors were selectively incorporated into PEO domains of PS-b-PEO due to the specific interactions. The addition of CdS quantum dots (QDs) into thin films of the PS-b-PEO/TiO2 sol-gel mixture led to the morphological changes from mixed wire/hexagonal dot to well-defined, quasi-hexagonal dot arrays. The PS-b-PEO/TiO2/CdS system showed an enhanced absorption along with red shift behavior in the UV-visible spectral range compared with the PS-b-PEO/TiO2 films. Photoluminescence (PL) studies showed a quenching of CdS emission in the presence of TiO2. An enhanced photocatalytic degradation of methylene blue (MB) was observed in the hybrid PS-b-PEO/TiO2/CdS thin film. © 2010 The Royal Society of Chemistry.
DOI
10.1039/b917858a
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자연과학대학 > 화학·나노과학전공 > Journal papers
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