Mirror-Like Photoconductive Layer-by-Layer Thin Films of Te Nanowires: The Fusion of Semiconductor, Metal, and Insulator Properties

Authors

  • Y. Wang,

    1. Departments of Chemical Engineering, Biomedical Engineering, and Materials Science and Engineering, H. H. Dow Bldg., 2300 Hayward St., University of Michigan, Ann Arbor, MI 48109, USA
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  • Z. Tang,

    1. Departments of Chemical Engineering, Biomedical Engineering, and Materials Science and Engineering, H. H. Dow Bldg., 2300 Hayward St., University of Michigan, Ann Arbor, MI 48109, USA
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  • P. Podsiadlo,

    1. Departments of Chemical Engineering, Biomedical Engineering, and Materials Science and Engineering, H. H. Dow Bldg., 2300 Hayward St., University of Michigan, Ann Arbor, MI 48109, USA
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  • Y. Elkasabi,

    1. Departments of Chemical Engineering, Biomedical Engineering, and Materials Science and Engineering, H. H. Dow Bldg., 2300 Hayward St., University of Michigan, Ann Arbor, MI 48109, USA
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  • J. Lahann,

    1. Departments of Chemical Engineering, Biomedical Engineering, and Materials Science and Engineering, H. H. Dow Bldg., 2300 Hayward St., University of Michigan, Ann Arbor, MI 48109, USA
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  • N. A. Kotov

    1. Departments of Chemical Engineering, Biomedical Engineering, and Materials Science and Engineering, H. H. Dow Bldg., 2300 Hayward St., University of Michigan, Ann Arbor, MI 48109, USA
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Abstract

original image

Te nanowires made from stabilizer- depleted CdTe nanoparticles are assembled in thin films following a layer-by-layer assembly protocol. The thin film has a distinctively metallic mirror-like appearance and displays a strong photoconductance effect characteristic of narrow-bandgap semiconductors. In situ reduction of gold results in the formation of Au nanoparticles adhering to Te nanowires, which leads to the disappearance of photoconductivity of the Te thin film.

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