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Issue 21, 2006
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Synthesis of solid solutions of Cd1−xZnxS nanocrystals in the channels of mesostructured silica films

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Abstract

In this contribution, we introduce the use of metal ion (Cd(II) and Zn(II)) modified mesostructured silica as a reaction medium, to produce a solid solution of Cd1−xZnxS nanocrystals as a thin film. With this approach, a true liquid crystalline templating (TLCT) and liquid crystalline mesophase of transition metal salt ∶ oligo(ethylene oxide) non-ionic surfactant (((1 − x)[Cd(H2O)4](NO3)2 + x[Zn(H2O)6](NO3)2) ∶ CH3(CH2)11(OCH2CH2)10OH, (MLC)), systems were collectively used to synthesise mesostructured silica films. The film samples were reacted at room temperature (RT) in an H2S atmosphere to produce zinc blend Cd1−xZnxS nanocrystals in the channels of mesostructured silica. The initial Zn(II) and Cd(II) ion concentrations in the reaction media determine the final composition and band gap of the Cd1−xZnxS nanocrystals. The growth process of the Cd1−xZnxS nanocrystals in the pores is influenced by the silica walls. If the walls are rigid (well polymerized, obtained by aging the samples before H2S treatment), then the Cd1−xZnxS nanoparticles are smaller in size and more uniform in size distribution.

Graphical abstract: Synthesis of solid solutions of Cd1−xZnxS nanocrystals in the channels of mesostructured silica films

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Publication details

The article was received on 20 Feb 2006, accepted on 29 Mar 2006 and first published on 21 Apr 2006


Article type: Paper
DOI: 10.1039/B602584F
Citation: J. Mater. Chem., 2006,16, 2048-2055
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    Synthesis of solid solutions of Cd1−xZnxS nanocrystals in the channels of mesostructured silica films

    Y. Akdoğan, Ç. Üzüm, Ö. Dag and N. Coombs, J. Mater. Chem., 2006, 16, 2048
    DOI: 10.1039/B602584F

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