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One step solution synthesis towards ultra-thin and uniform single-crystalline ZnO nanowires

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Abstract

Bundles of high-aspect-ratio single-crystalline ZnO nanowires were fabricated by a single-step mild hydrothermal condition without the use of a seeding layer, thus eliminating an annealing step. The growth yields nanowires of high aspect ratio (>200). No significant lateral growth takes place with prolonged reaction time. The morphology and aspect ratio of the final products depend on the concentration of the precursors; a highly water-soluble tetradentate cyclic tertiary amine and zinc nitrate system. The nanowires grow along the [0001] direction and have an average width of <10 nm and a narrow distribution of ±5 nm. Photoluminescence measurements of the ultra-thin nanowires exhibit a strong band-edge emission at room temperature. The highly crystalline sub tens of nanometer scale diameter nanowires can, in combination, be a good one-dimensional candidate to study optical and electronic properties.

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Authors and Affiliations

  1. Engineering Science Programme, National University of Singapore, 9 Engineering Drive 1, 117576, Singapore, Singapore

    G.W. Ho

  2. Department of Electrical and Computer Engineering, National University of Singapore, 4 Engineering Drive, 117576, Singapore, Singapore

    G.W. Ho

  3. Institute of Materials Research and Engineering, 3 Research Link, 117602, Singapore, Singapore

    A.S.W. Wong

Authors
  1. G.W. Ho
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  2. A.S.W. Wong
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Correspondence to G.W. Ho.

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PACS

81.16.Be; 81.07.Bc

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Ho, G., Wong, A. One step solution synthesis towards ultra-thin and uniform single-crystalline ZnO nanowires. Appl. Phys. A 86, 457–462 (2007). https://doi.org/10.1007/s00339-006-3798-3

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  • DOI: https://doi.org/10.1007/s00339-006-3798-3

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