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A welding phenomenon of dissimilar nanoparticles in dispersion

Author

Listed:
  • Zhiqi Huang

    (Tianjin University
    University of Maryland)

  • Zhi-Jian Zhao

    (Tianjin University)

  • Qian Zhang

    (University of Maryland)

  • Lili Han

    (Tianjin University of Technology)

  • Xiumei Jiang

    (U.S. Food and Drug Administration)

  • Chao Li

    (Tianjin University of Technology)

  • Maria T. Perez Cardenas

    (University of Maryland)

  • Peng Huang

    (Shenzhen University)

  • Jun-Jie Yin

    (U.S. Food and Drug Administration)

  • Jun Luo

    (Tianjin University of Technology)

  • Jinlong Gong

    (Tianjin University)

  • Zhihong Nie

    (University of Maryland
    Department of Macromolecular Science, Fudan University, Shanghai)

Abstract

The oriented attachment of small nanoparticles (NPs) is recognized as an important mechanism involved in the growth of inorganic nanocrystals. However, non-oriented attachment of dissimilar NPs has been rarely observed in dispersion. This communication reports a welding phenomenon occurred directly between as-synthesized dispersions of single-component Au and chalcogenide NPs, which leads to the formation of asymmetric Au-chalcogenide hybrid NPs (HNPs). The welding of dissimilar NPs in dispersion is mainly driven by the ligand desorption-induced conformal contact between NPs and the diffusion of Au into chalcogenide NPs. The welding process can occur between NPs with distinct shapes or different capping agents or in different solvent media. A two-step assembly-welding mechanism is proposed for this process, based on our in situ electron spin resonance measurements and ab initio molecular dynamics simulation. The understanding of NP welding in dispersion may lead to the development of unconventional synthetic tools for the fabrication of hybrid nanostructures with diverse applications.

Suggested Citation

  • Zhiqi Huang & Zhi-Jian Zhao & Qian Zhang & Lili Han & Xiumei Jiang & Chao Li & Maria T. Perez Cardenas & Peng Huang & Jun-Jie Yin & Jun Luo & Jinlong Gong & Zhihong Nie, 2019. "A welding phenomenon of dissimilar nanoparticles in dispersion," Nature Communications, Nature, vol. 10(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-018-08206-6
    DOI: 10.1038/s41467-018-08206-6
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