Quantized colloids produced by dissolution of layered semiconductors in acetonitrile

Small collodial particles (10-35 A) of crystalline MoS/sub 2/ and WS/sub 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 diffrac...

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Veröffentlicht in:J. Phys. Chem.; (United States) 1988-03, Vol.92 (6), p.1400-1402
Hauptverfasser: Peterson, M. W, Nenadovic, M. T, Rajh, T, Herak, R, Micic, O. I, Goral, J. P, Nozik, A. J
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container_title J. Phys. Chem.; (United States)
container_volume 92
creator Peterson, M. W
Nenadovic, M. T
Rajh, T
Herak, R
Micic, O. I
Goral, J. P
Nozik, A. J
description Small collodial particles (10-35 A) of crystalline MoS/sub 2/ and WS/sub 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. The authors speculate that the MoS/sub 2/ and WS/sub 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/sub 2/ suggest that this material may also form colloids by a similar mechanism.
doi_str_mv 10.1021/j100317a007
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Granulometry. Electrokinetic phenomena</topic><topic>REFRACTORY METAL COMPOUNDS</topic><topic>SIZE</topic><topic>SOLID CLUSTERS</topic><topic>SPECTROSCOPY</topic><topic>SULFIDES</topic><topic>SULFUR COMPOUNDS</topic><topic>SYNTHESIS</topic><topic>TRANSITION ELEMENT COMPOUNDS</topic><topic>TUNGSTEN COMPOUNDS</topic><topic>TUNGSTEN SULFIDES</topic><topic>VAN DER WAALS FORCES</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Peterson, M. W</creatorcontrib><creatorcontrib>Nenadovic, M. T</creatorcontrib><creatorcontrib>Rajh, T</creatorcontrib><creatorcontrib>Herak, R</creatorcontrib><creatorcontrib>Micic, O. I</creatorcontrib><creatorcontrib>Goral, J. P</creatorcontrib><creatorcontrib>Nozik, A. J</creatorcontrib><creatorcontrib>Solar Energy Research Institute, Golden, CO (USA)</creatorcontrib><collection>Istex</collection><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>OSTI.GOV</collection><jtitle>J. Phys. 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ispartof J. Phys. Chem.; (United States), 1988-03, Vol.92 (6), p.1400-1402
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source ACS Journals
subjects 400201 - Chemical & Physicochemical Properties
ABSORPTION SPECTROSCOPY
ACETONITRILE
CHALCOGENIDES
CHEMICAL PREPARATION
Chemistry
Colloidal state and disperse state
COLLOIDS
CRYSTALS
DISPERSIONS
Exact sciences and technology
General and physical chemistry
INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY
MOLYBDENUM COMPOUNDS
MOLYBDENUM SULFIDES
NITRILES
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PARTICLE SIZE
Physical and chemical studies. Granulometry. Electrokinetic phenomena
REFRACTORY METAL COMPOUNDS
SIZE
SOLID CLUSTERS
SPECTROSCOPY
SULFIDES
SULFUR COMPOUNDS
SYNTHESIS
TRANSITION ELEMENT COMPOUNDS
TUNGSTEN COMPOUNDS
TUNGSTEN SULFIDES
VAN DER WAALS FORCES
title Quantized colloids produced by dissolution of layered semiconductors in acetonitrile
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