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Atomically resolved Au52Cu72(SR)55 nanoalloy reveals Marks decahedron truncation and Penrose tiling surface

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  • Yongbo Song

    (Anhui University
    Anhui University, Ministry of Education)

  • Yingwei Li

    (Carnegie Mellon University)

  • Hao Li

    (Anhui University
    Anhui University, Ministry of Education)

  • Feng Ke

    (Anhui University
    Anhui University, Ministry of Education)

  • Ji Xiang

    (Anhui University
    Anhui University, Ministry of Education)

  • Chuanjun Zhou

    (Anhui University
    Anhui University, Ministry of Education)

  • Peng Li

    (Anhui University
    Anhui University, Ministry of Education)

  • Manzhou Zhu

    (Anhui University
    Anhui University, Ministry of Education)

  • Rongchao Jin

    (Carnegie Mellon University)

Abstract

Gold-copper alloys have rich forms. Here we report an atomically resolved [Au52Cu72(p-MBT)55]+Cl− nanoalloy (p-MBT = SPh-p-CH3). This nanoalloy exhibits unusual structural patterns. First, two Cu atoms are located in the inner 7-atom decahedral kernel (M7, M = Au/Cu). The M7 kernel is then enclosed by a second shell of homogold (Au47), giving rise to a two-shelled M54 (i.e. Au52Cu2) full decahedron. A comparison of the non-truncated M54 decahedron with the truncated homogold Au49 kernel in similar-sized gold nanoparticles provides for the first time an explanation for Marks decahedron truncation. Second, a Cu70(SR)55 exterior cage resembling a 3D Penrose tiling protects the M54 decahedral kernel. Compared to the discrete staple motifs in gold:thiolate nanoparticles, the Cu-thiolate surface of Au52Cu72 forms an extended cage. The Cu-SR Penrose tiling retains the M54 kernel’s high symmetry (D5h). Third, interparticle interactions in the assembly are closely related to the symmetry of the particle, and a “quadruple-gear-like” interlocking pattern is observed.

Suggested Citation

  • Yongbo Song & Yingwei Li & Hao Li & Feng Ke & Ji Xiang & Chuanjun Zhou & Peng Li & Manzhou Zhu & Rongchao Jin, 2020. "Atomically resolved Au52Cu72(SR)55 nanoalloy reveals Marks decahedron truncation and Penrose tiling surface," Nature Communications, Nature, vol. 11(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:11:y:2020:i:1:d:10.1038_s41467-020-14400-2
    DOI: 10.1038/s41467-020-14400-2
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    Cited by:

    1. Zhen Sun & Yao Zhang & Zezhou Li & Zhiheng Xie & Yiheng Dai & Xuanxuan Du & Colin Ophus & Jihan Zhou, 2025. "Strain release by 3D atomic misfit in fivefold twinned icosahedral nanoparticles with amorphization and dislocations," Nature Communications, Nature, vol. 16(1), pages 1-13, December.

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