High-resolution transmission electron microscopy of hexagonal and rhombohedral molybdenum disulfide crystals.
Natural (molybdenite) and synthesized molybdenum disulfide crystals have been studied by high-resolution transmission electron microscopy. The image simulation demonstrates that the [0001] and [0110] HRTEM images of hexagonal and rhombohedral MoS2 crystals hardly disclose their stacking sequences, and that the [2110] images can distinguish the Mo and S columns along the incident electron beam and enable one to determine not only the crystal structure but also the fault structure. Observed [0001] images of cleaved molybdenite and synthesized MoS2 crystals, however, reveal the strain field around partial dislocations limiting an extended dislocation. A cross-sectional image of a single molecular (S-Mo-S) layer cleaved from molybdenite has been observed. Synthesized MoS2 flakes which were prepared by grinding have been found to be rhombohedral crystals containing many stacking faults caused by glides between S/S layers.
Isshiki
T
T
Kyoto Institute of Technology, Japan.
Nishio
K
K
Saijo
H
H
Shiojiri
M
M
Yabuuchi
Y
Y
Takahashi
N
N
D003461:Crystallography; D004220:Disulfides / Q000737:chemistry*; D008854:Microscopy, Electron; D008982:Molybdenum / Q000737:chemistry*
D004220:Disulfides; D008982:Molybdenum; C082964:molybdenum disulfide