Dynamic hetero-metallic bondings visualized by sequential atom imaging

Minori Inazu, Yuji Akada, Takane Imaoka (), Yoko Hayashi, Chinami Takashima, Hiromi Nakai and Kimihisa Yamamoto ()
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Minori Inazu: Tokyo Institute of Technology
Yuji Akada: Tokyo Institute of Technology
Takane Imaoka: Tokyo Institute of Technology
Yoko Hayashi: Tokyo Institute of Technology
Chinami Takashima: Waseda University
Hiromi Nakai: Waseda University
Kimihisa Yamamoto: Tokyo Institute of Technology

Nature Communications, 2022, vol. 13, issue 1, 1-9

Abstract: Abstract Traditionally, chemistry has been developed to obtain thermodynamically stable and isolable compounds such as molecules and solids by chemical reactions. However, recent developments in computational chemistry have placed increased importance on studying the dynamic assembly and disassembly of atoms and molecules formed in situ. This study directly visualizes the formation and dissociation dynamics of labile dimers and trimers at atomic resolution with elemental identification. The video recordings of many homo- and hetero-metallic dimers are carried out by combining scanning transmission electron microscopy (STEM) with elemental identification based on the Z-contrast principle. Even short-lived molecules with low probability of existence such as AuAg, AgCu, and AuAgCu are directly visualized as a result of identifying moving atoms at low electron doses.

Date: 2022
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DOI: 10.1038/s41467-022-30533-y

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