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1 Janelia Publications

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    Gonen Lab
    06/24/17 | MicroED structure of Au146(p-MBA)57 at subatomic resolution reveals a twinned FCC cluster.
    Vergara S, Lukes DA, Martynowycz MW, Santiago U, Plascencia-Villa G, Weiss SC, de la Cruz MJ, Black DM, Alvarez MM, Lopez-Lozano X, Barnes CO, Lin G, Weissker H, Whetten RL, Gonen T, Calero G
    Journal of Physical Chemistry Letters. 2017 Oct 31;8(5523-30):arXiv:1706.07902 [physics.atm-clus]. doi: 10.1021/acs.jpclett.7b02621

    Solving the atomic structure of metallic clusters is fundamental to understanding their optical, electronic, and chemical properties. We report the structure of Au146(p-MBA)57 at subatomic resolution (0.85 {\AA}) using electron diffraction (MicroED) and atomic resolution by X-ray diffraction. The 146 gold atoms may be decomposed into two constituent sets consisting of 119 core and 27 peripheral atoms. The core atoms are organized in a twinned FCC structure whereas the surface gold atoms follow a C2 rotational symmetry about an axis bisecting the twinning plane. The protective layer of 57 p-MBAs fully encloses the cluster and comprises bridging, monomeric, and dimeric staple motifs. Au146(p-MBA)57 is the largest cluster observed exhibiting a bulk-like FCC structure as well as the smallest gold particle exhibiting a stacking fault.

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