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Three-dimensional binary superlattices of magnetic nanocrystals and semiconductor quantum dots

Author

Listed:
  • F. X. Redl

    (IBM, T. J. Watson Research Center, Nanoscale Materials and Devices
    Columbia University)

  • K.-S. Cho

    (IBM, T. J. Watson Research Center, Nanoscale Materials and Devices
    University of New Orleans)

  • C. B. Murray

    (IBM, T. J. Watson Research Center, Nanoscale Materials and Devices)

  • S. O'Brien

    (Columbia University)

Abstract

Recent advances in strategies for synthesizing nanoparticles—such as semiconductor quantum dots1, magnets and noble-metal clusters2—have enabled the precise control of composition, size, shape3, crystal structure4, and surface chemistry. The distinct properties of the resulting nanometre-scale building blocks can be harnessed in assemblies with new collective properties2,5,6, which can be further engineered by controlling interparticle spacing and by material processing. Our study is motivated by the emerging concept of metamaterials7—materials with properties arising from the controlled interaction of the different nanocrystals in an assembly. Previous multi-component nanocrystal assemblies have usually resulted in amorphous or short-range-ordered materials8,9 because of non-directional forces or insufficient mobility during assembly10,11,12,13,14. Here we report the self-assembly of PbSe semiconductor quantum dots and Fe2O3 magnetic nanocrystals into precisely ordered three-dimensional superlattices. The use of specific size ratios directs the assembly of the magnetic and semiconducting nanoparticles into AB13 or AB2 superlattices with potentially tunable optical and magnetic properties. This synthesis concept could ultimately enable the fine-tuning of material responses to magnetic, electrical, optical and mechanical stimuli6.

Suggested Citation

  • F. X. Redl & K.-S. Cho & C. B. Murray & S. O'Brien, 2003. "Three-dimensional binary superlattices of magnetic nanocrystals and semiconductor quantum dots," Nature, Nature, vol. 423(6943), pages 968-971, June.
    • Handle: RePEc:nat:nature:v:423:y:2003:i:6943:d:10.1038_nature01702
    DOI: 10.1038/nature01702
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    Cited by:

    1. Yilong Zhou & Gaurav Arya, 2022. "Discovery of two-dimensional binary nanoparticle superlattices using global Monte Carlo optimization," Nature Communications, Nature, vol. 13(1), pages 1-12, December.
    2. Ricky Dwi Septianto & Retno Miranti & Tomoka Kikitsu & Takaaki Hikima & Daisuke Hashizume & Nobuhiro Matsushita & Yoshihiro Iwasa & Satria Zulkarnaen Bisri, 2023. "Enabling metallic behaviour in two-dimensional superlattice of semiconductor colloidal quantum dots," Nature Communications, Nature, vol. 14(1), pages 1-10, December.

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