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Issue 31, 2011
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Surfactant effect on the formation of CuInSe2 nanowires in solution phase synthesis

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Abstract

Solution-phase synthesis of CuInSe2 nanowires without using metal nanocrystal catalysts has been demonstrated. The morphology of chalcopyrite CuInSe2 nanoparticles could be varied from spheres to highly anisotropic nanowires by varying the relative amount of strong and weak binding surfactants passivating the surface. For CuInSe2 nanowires, weakly binding dioctylphosphine oxide (DOPO) was found to be the key surfactant that enables the anisotropic 1-dimensional growth. Detailed analysis of the structure of the nanowires indicates that they grow perpendicular to (112) planes, with twinning around the growth axis by ∼60° rotation. The nanowires of CuInSe2 synthesized in this study exhibit saw-tooth surface morphology resembling a stack of truncated tetrahedra which show a continuous growth mechanism.

Graphical abstract: Surfactant effect on the formation of CuInSe2 nanowires in solution phase synthesis

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Publication details

The article was received on 26 Jan 2011, accepted on 10 Mar 2011 and first published on 07 Apr 2011


Article type: Paper
DOI: 10.1039/C1JM10401B
Citation: J. Mater. Chem., 2011,21, 11618-11625
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    Surfactant effect on the formation of CuInSe2 nanowires in solution phase synthesis

    S. E. Wark, C. Hsia, Z. Luo and D. H. Son, J. Mater. Chem., 2011, 21, 11618
    DOI: 10.1039/C1JM10401B

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