Assembly-induced spin transfer and distance-dependent spin coupling in atomically precise AgCu nanoclusters

Nan Xia, Jianpei Xing, Di Peng, Shiyu Ji, Jun Zha, Nan Yan, Yan Su, Xue Jiang, Zhi Zeng (), Jijun Zhao () and Zhikun Wu ()
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Nan Xia: Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences
Jianpei Xing: Ion and Electron Beams (Dalian University of Technology), Ministry of Education
Di Peng: Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences
Shiyu Ji: Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences
Jun Zha: Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences
Nan Yan: Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences
Yan Su: Ion and Electron Beams (Dalian University of Technology), Ministry of Education
Xue Jiang: Ion and Electron Beams (Dalian University of Technology), Ministry of Education
Zhi Zeng: Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences
Jijun Zhao: Ion and Electron Beams (Dalian University of Technology), Ministry of Education
Zhikun Wu: Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences

Nature Communications, 2022, vol. 13, issue 1, 1-11

Abstract: Abstract Nanoparticle assembly paves the way for unanticipated properties and applications from the nanoscale to the macroscopic world. However, the study of such material systems is greatly inhibited due to the obscure compositions and structures of nanoparticles (especially the surface structures). The assembly of atomically precise nanoparticles is challenging, and such an assembly of nanoparticles with metal core sizes strictly larger than 1 nm has not been achieved yet. Here, we introduced an on-site synthesis-and-assembly strategy, and successfully obtained a straight-chain assembly structure consisting of Ag77Cu22(CHT)48 (CHT: cyclohexanethiolate) nanoparticles with two nanoparticles separated by one S atom, as revealed by mass spectrometry and single crystal X-ray crystallography. Although Ag77Cu22(CHT)48 bears one unpaired shell-closing electron, the magnetic moment is found to be mainly localized at the S linker with magnetic isotropy, and the sulfur radicals were experimentally verified and found to be unstable after disassembly, demonstrating assembly-induced spin transfer. Besides, spin nanoparticles are found to couple and lose their paramagnetism at sufficiently short inter-nanoparticle distance, namely, the spin coupling depends on the inter-nanoparticle distance. However, it is not found that the spin coupling leads to the nanoparticle growth.

Date: 2022
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DOI: 10.1038/s41467-022-33651-9

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