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Sub-Two Nanometer Single Crystal Au Nanowires
Nano Letters (2008)
  • Ziyang Huo, University of California - Berkeley
  • Chia-Kuang Tsung, University of California - Berkeley
  • Wenyu Huang, University of California - Berkeley
  • Xiaofeng Zhang, Lawrence Berkeley National Laboratory
  • Peidong Yang, University of California - Berkeley

Ultrathin single crystal Au nanowires with diameter of ∼1.6 nm and length of few micrometers were synthesized with high yield by simply mixing HAuCl4 and oleylamine at room temperature. High resolution transmission electron microscopy studies revealed that all of these nanowires are single crystalline and grew along the [111] direction. The valency evolution of the gold species during the synthesis was studied by X-ray photoelectron spectroscopy, which showed a clear Au3+ → Au+ → Au stepwise reduction at different reaction stages. Small angle X-ray scattering and small-angle X-ray diffraction suggest mesostructure formation upon HAuCl4 and oleylamine mixing. The slow in situ reduction of this mesostructure leads to the formation of ultrathin nanowires in solution. This novel nanowire growth mechanism relies on cooperative interaction, organization, and reaction between inorganic precursor salts and oleylamine.

Publication Date
Publisher Statement
Reprinted (adapted) with permission from Nano Lett., 2008, 8 (7), pp 2041–2044. Copyright 2008 American Chemical Society.
Citation Information
Ziyang Huo, Chia-Kuang Tsung, Wenyu Huang, Xiaofeng Zhang, et al.. "Sub-Two Nanometer Single Crystal Au Nanowires" Nano Letters Vol. 8 Iss. 7 (2008)
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