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Supported metal sulphide nanoclusters studied by HAADF‐STEM
Author(s) -
CARLSSON A.,
BRORSON M.,
TOPSØE H.
Publication year - 2006
Publication title -
journal of microscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.569
H-Index - 111
eISSN - 1365-2818
pISSN - 0022-2720
DOI - 10.1111/j.1365-2818.2006.01614.x
Subject(s) - nanoclusters , morphology (biology) , molybdenum , scanning transmission electron microscopy , dark field microscopy , tungsten , materials science , dodecahedron , metal , transmission electron microscopy , crystallography , nickel , hexagonal crystal system , non blocking i/o , nanotechnology , chemistry , metallurgy , optics , microscopy , physics , biochemistry , catalysis , genetics , biology
Summary The morphology of MoS 2 and WS 2 nanoclusters supported on high‐surface area graphitic carbon was investigated using high angular annular dark field scanning transmission electron microscopy (HAADF‐STEM). Most of the MoS 2 (WS 2 ) nanoclusters contain only a single S‐Mo‐S (S‐W‐S) layer and the most commonly encountered morphology is truncated triangular. This is in contrast to the hexagonal morphology of macroscopic MoS 2 (WS 2 ) crystals. When in addition to molybdenum (tungsten), nickel is also present, the regular nanoclusters are truncated to a larger extent, indicating that Ni has influenced the morphology by the formation of so‐called Ni‐Mo‐S (Ni‐W‐S) structures. For these structures, the additional truncations are observed to lead to dodecahedral‐like shapes.