Primary growth of binary nanoparticle superlattices with distinct systems contingent on synergy: softness and crystalline anisotropy

  • Huiyong Li
  • Dafeng Hu
  • Zemin Zheng
  • Hao Jiang
  • Jiangwei Lu
  • Xuemin Geng
  • Xudong Zhang
  • Yanfen WanEmail author
  • Peng YangEmail author
Original Article


Binary nanoparticle superlattices (BNSLs), which are studied for developing multicomponent materials and multifunctional nanodevices, are distinguished by their outstanding synergetic properties. Owing to complex factors that might influence the formation of BNSLs, it is necessary to comprehensively explore the self-assembly of nanocrystals. A variety of BNSL structural configurations, such as NaZn13, Cu3Au, NaCl, AlB2, CaCu5-type structures, were obtained by cocrystallizing Au–Ni and Ag–Ni nanocrystals of different sizes. Specifically, at a similar effective size ratio, the supercrystal structures formed by the Au–Ni and Ag–Ni systems coated with different organic ligands are not essentially the same. We attribute this diversity to the different softness of effective entities and facet-dependent interdigitation between the ligands tethered on the nanoparticle surface. Inherent crystallinity directed formation of the final BNSL structures is likely driven by anisotropic or isotropic cocrystallization. The synergistic effect of the coating agent and crystallinity directed assembly process is reasonably believed to be the important factor affecting the growth of BNSLs, which provides a new idea for the study of kinetics during the self-assembly of supercrystals.


BNSLs Ligand Softness parameters The degree of overlaps Coordination environment The intrinsic crystallinity 



The authors acknowledge financial support by the National Science Foundation of China (51871196 and 51771170) and the Applied Basic Research Foundation of Yunnan Province (2017FB080 and 2018FB090). Electron microscopy was carried out in the Analytical Test Center of the Yunnan University.

Compliance with ethical standards

Conflict of interest

The authors declare no conflict of interest.

Supplementary material

13204_2019_1244_MOESM1_ESM.docx (13.7 mb)
Supplementary file1 (DOCX 14071 kb)


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Copyright information

© King Abdulaziz City for Science and Technology 2020

Authors and Affiliations

  1. 1.School of Materials Science and Engineering, Yunnan Key Laboratory for Micro/Nano Materials and TechnologyYunnan UniversityKunmingChina

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