Abstract
Small colloidal particles (10-35 Angstrom) of crystalline MoS//2 and WS//2 exhibiting size quantization effects in their optical absorption spectra are believed to form by simple dissolution of crystalline powder in acetonitrile. This conclusion is supported by electron microscopy, electron diffraction, X-ray diffraction, EDAX, and chemical analyses. We speculate that the MoS//2 and WS//2 clusters are formed by cleavage of the van der Waals layers by penetrating solvent molecules, a process related to the well-known formation of colloids from layered clay structures. Preliminary experiments with layered WSe//2 suggest that this material may also form colloids by a similar mechanism.
Original language | English (US) |
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Pages (from-to) | 1400-1402 |
Number of pages | 3 |
Journal | Journal of physical chemistry |
Volume | 92 |
Issue number | 6 |
DOIs | |
State | Published - 1988 |
Externally published | Yes |
ASJC Scopus subject areas
- General Engineering
- Physical and Theoretical Chemistry