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Issue 4, 2010
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On the synergistic coupling properties of composite CdS/TiO2 nanoparticle arrays confined in nanopatterned hybrid thin films

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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.

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

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Publication details

The article was received on 01 Sep 2009, accepted on 22 Oct 2009 and first published on 25 Nov 2009


Article type: Paper
DOI: 10.1039/B917858A
Citation: J. Mater. Chem., 2010,20, 677-682
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    On the synergistic coupling properties of composite CdS/TiO2 nanoparticle arrays confined in nanopatterned hybrid thin films

    D. Kannaiyan, E. Kim, N. Won, K. W. Kim, Y. H. Jang, M. Cha, D. Y. Ryu, S. Kim and D. H. Kim, J. Mater. Chem., 2010, 20, 677
    DOI: 10.1039/B917858A

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