Self-assembled metal quantum dots

L. J. Chen, P. Y. Su, J. M. Liang, J. C. Hu, W. W. Wu, S. L. Cheng

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

Long-range order of uniform in size and regular in shape 2D arrays of Au@TOAB-DT nanoparticles (4.9 nm) were formed by a displacement reaction of the outer-shells from tetraoctylammonium bromide (TOAB) to dodecanethiol (DT) molecules at room temperature. The displacement reaction has utilized both superior size and shape control of Au@TOAB nanoparticles and uniform dispersion capability of Au@DT nanoparticles to achieve an extraordinarily large in extent (3 μm × 3 μm) regular nanoparticle lattice structure. Self-assembled NiSi quantum dot arrays have been grown on relaxed epitaxial Si 0.7Ge0.3 on (001)Si. The formation of the one-dimensional ordered structure is attributed to the nucleation of NiSi nanodots on the surface undulations induced by step bunching on the surface of SiGe film owing to the miscut of the wafers from normal to the (001)Si direction. The two-dimensional, pseudo-hexagonal structure was achieved under the influence of repulsive stress between nanodots.

Original languageEnglish
Pages (from-to)877-889
Number of pages13
JournalInternational Journal of Nanoscience
Volume3
Issue number6
DOIs
StatePublished - Dec 2004

Keywords

  • Au
  • Nisi
  • Quantum dots
  • Self-assembled

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