The Role of Precursor-Decomposition Kinetics in Silicon-Nanowire Synthesis in Organic Solvents

Authors

  • Doh C. Lee,

    1. Department of Chemical Engineering, Texas Materials Institute, Center for Nano- and Molecular Science and Technology, The University of Texas at Austin, Austin, TX 78712-1062, USA, Fax: (+1) 512-471-7060
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  • Tobias Hanrath,

    1. Department of Chemical Engineering, Texas Materials Institute, Center for Nano- and Molecular Science and Technology, The University of Texas at Austin, Austin, TX 78712-1062, USA, Fax: (+1) 512-471-7060
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  • Brian A. Korgel Prof.

    1. Department of Chemical Engineering, Texas Materials Institute, Center for Nano- and Molecular Science and Technology, The University of Texas at Austin, Austin, TX 78712-1062, USA, Fax: (+1) 512-471-7060
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  • This work was supported financially by the National Science Foundation, the Welch Foundation, and the Advanced Materials Research Center in collaboration with International SEMATECH. We acknowledge fruitful discussions with A. E. Saunders and thank J. P. Zhou for assistance with the high-resolution transmission electron microscopy.

Abstract

original image

Under pressure! The synthesis of crystalline silicon nanowires can be carried out in organic solvents at reaction temperatures of up to 450–500°C under high-pressure conditions. Gold particles are used as seeds, and organosilanes are employed as the silicon source. The decomposition chemistry of the organosilanes determines the quality of the nanowires formed (see picture of an Si nanowire with an Si/Au tip).

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