Electric transport properties and1H NMR study of the fullerene-Iike WS2 nanoparticles

Frieda Kopnov; Gregory Leitus; Alex Yoffe; Isai Feldman; A. M. Panich; Reshef Tenne

doi:10.1002/pssb.200669153

Electric transport properties and¹H NMR study of the fullerene-Iike WS₂ nanoparticles

Frieda Kopnov, Gregory Leitus, Alex Yoffe, Isai Feldman, A. M. Panich, Reshef Tenne

Department of Physics

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Abstract

Electrical resistivity and Hall measurements, of pellets compacted from IF-WS₂ nanoparticles and 2H-WS₂ powder were done. Electrical transport measurements were carried out on pellets by the van der Pauw method in a wide temperature range. Arrhenius plots for conductivities of the WS₂ samples (2H, IF and IF+treatment) exhibit marked variations in (∂ ln ∂T^-1)/∂T^-1 with temperature. Resistivity of IF-WS₂ pellets is higher than that of 2H-WS ₂ pellets. It was found that the electrical properties of IF-WS ₂ powder vary with aposteriory heat treatment under vacuum. The ¹H NMR measurements show that the prepared product contains water (and possibly some hydrogen) molecules that occupy the voids in the central part of the fullerene-like nanoparticles and the nanopores between the adhering IF-WS₂ particles. Defects in the IF-WS₂ structure, arising due to the strain release during the folding of the layers, may result in additional sites for the absorbed water.

Original language	English
Pages (from-to)	3290-3296
Number of pages	7
Journal	Physica Status Solidi (B): Basic Research
Volume	243
Issue number	13
DOIs	https://doi.org/10.1002/pssb.200669153
State	Published - 1 Nov 2006

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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title = "Electric transport properties and1H NMR study of the fullerene-Iike WS2 nanoparticles",

abstract = "Electrical resistivity and Hall measurements, of pellets compacted from IF-WS2 nanoparticles and 2H-WS2 powder were done. Electrical transport measurements were carried out on pellets by the van der Pauw method in a wide temperature range. Arrhenius plots for conductivities of the WS2 samples (2H, IF and IF+treatment) exhibit marked variations in (∂ ln ∂T-1)/∂T-1 with temperature. Resistivity of IF-WS2 pellets is higher than that of 2H-WS 2 pellets. It was found that the electrical properties of IF-WS 2 powder vary with aposteriory heat treatment under vacuum. The 1H NMR measurements show that the prepared product contains water (and possibly some hydrogen) molecules that occupy the voids in the central part of the fullerene-like nanoparticles and the nanopores between the adhering IF-WS2 particles. Defects in the IF-WS2 structure, arising due to the strain release during the folding of the layers, may result in additional sites for the absorbed water.",

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AU - Leitus, Gregory

AU - Yoffe, Alex

AU - Feldman, Isai

AU - Panich, A. M.

AU - Tenne, Reshef

PY - 2006/11/1

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N2 - Electrical resistivity and Hall measurements, of pellets compacted from IF-WS2 nanoparticles and 2H-WS2 powder were done. Electrical transport measurements were carried out on pellets by the van der Pauw method in a wide temperature range. Arrhenius plots for conductivities of the WS2 samples (2H, IF and IF+treatment) exhibit marked variations in (∂ ln ∂T-1)/∂T-1 with temperature. Resistivity of IF-WS2 pellets is higher than that of 2H-WS 2 pellets. It was found that the electrical properties of IF-WS 2 powder vary with aposteriory heat treatment under vacuum. The 1H NMR measurements show that the prepared product contains water (and possibly some hydrogen) molecules that occupy the voids in the central part of the fullerene-like nanoparticles and the nanopores between the adhering IF-WS2 particles. Defects in the IF-WS2 structure, arising due to the strain release during the folding of the layers, may result in additional sites for the absorbed water.

AB - Electrical resistivity and Hall measurements, of pellets compacted from IF-WS2 nanoparticles and 2H-WS2 powder were done. Electrical transport measurements were carried out on pellets by the van der Pauw method in a wide temperature range. Arrhenius plots for conductivities of the WS2 samples (2H, IF and IF+treatment) exhibit marked variations in (∂ ln ∂T-1)/∂T-1 with temperature. Resistivity of IF-WS2 pellets is higher than that of 2H-WS 2 pellets. It was found that the electrical properties of IF-WS 2 powder vary with aposteriory heat treatment under vacuum. The 1H NMR measurements show that the prepared product contains water (and possibly some hydrogen) molecules that occupy the voids in the central part of the fullerene-like nanoparticles and the nanopores between the adhering IF-WS2 particles. Defects in the IF-WS2 structure, arising due to the strain release during the folding of the layers, may result in additional sites for the absorbed water.

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Electric transport properties and¹H NMR study of the fullerene-Iike WS₂ nanoparticles

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