Results 191 to 200 of about 18,653 (230)
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Superconductivity in transition metal chalcogenides
Physica B+C, 1981Abstract The upper critical field anisotropy H C2‖ H C2⊥ has been studied in 2H-TaS2 intercalated with methylamine and pyridine, and comparison to theoretical models predicting dimensional crossover has been made. The temperature dependence of HC2‖ shows upward curvature over a substantial range of temperature below Tc, and good ...
R.V. Coleman, S.J. Hillenius
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Preparation of transition metal chalcogenide fluorides
Journal of Fluorine Chemistry, 1982Abstract The species WSF4 has been observed in solution by reacting WSCl4 with HF or XeF2 in dry CH3CN, and was initially isolated as a solid by reacting WF6 with Sb2S3 at 300°C. In this paper new methods for preparing WSF4 by thermal or room temperature reactions are outlined.
David Brown +2 more
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Atomic Engineering of Chalcogenide Layer in Transition Metal Chalcogenides
ECS Meeting Abstracts, 2017Atomically thin transition metal chalcogenides (TMDs), members of two-dimensional (2D) material family, have received great attention due to their novel optoelectronic and electronic properties. CVD technique have been well developed to synthesize monolayer TMDs, such as MoS2, WS2, WSe2, and MoSe2 where transition metals are sandwiched by the same ...
Chih-Wen Yang, Ang-Yu Lu, Lain-Jong Li
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Two‐Dimensional Transition Metal Chalcogenides for Alkali Metal Ions Storage
ChemSusChem, 2020AbstractOn the heels of exacerbating environmental concerns and ever‐growing global energy demand, development of high‐performance renewable energy‐storage and ‐conversion devices has aroused great interest. The electrode materials, which are the critical components in electrochemical energy storage (EES) devices, largely determine the energy‐storage ...
Yingxi, Zhang +4 more
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Transition-metal-doped chalcogenide lasers
Journal of Electronic Materials, 2002Broadly tunable mid-infrared lasers are desirable for a number of scientific, remote-sensing, and military applications. Recently, Cr2+-doped chalcogenide lasers have emerged as an attractive source of tunable laser radiation in the 2-3.4-µm region. This paper provides a brief introduction to this field, summarizes key laser work to date, and provides ...
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Diffraction from transition metal chalcogenide nanotubes
Materials Science and Engineering: B, 2011Abstract Quasi-one dimensional crystals are built of elements pertaining to fifteen elementary conformation classes. Quite recently, general expressions for diffraction intensity have been found for each of these classes. Here, these results are used to predict diffraction patterns from inorganic MS 2 (M = Mo,W) single-wall nanotubes.
Ivanka Milošević +2 more
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Phase transitions in transition-metal chalcogenides
Solid State Communications, 1966Abstract In many transition metal chalcogenides the anions are hexagonally close packed, the cations occupying octahedral sites. In compounds of the composition M 1−x X (M=metal, X=chalcogene) the octahedral sites are partly vacant. If the vacant sites are distributed randomly over all octahedral sites, the crystal has the full symmetry of the NiAs ...
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A Synthetic Method for Transition‐Metal Chalcogenide Nanocrystals
Chemistry – A European Journal, 2009AbstractA facile wet route was applied to prepare a series of chalcogenide semiconductor nanocrystals (see figure) in controllable shapes and sizes, while a general bottom‐up approach was adopted to transform these cyclohexane‐soluble monodisperse nanocrystals into water‐soluble colloidal spheres.magnified imageIn this paper, we prepared a series of ...
Ding-Sheng, Wang +4 more
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Ternary Transition Metal Chalcogenides AB2X4
1993Ternary chalcogenides of the type AB2X4 (A, B = transition metals and X = S, Se, Te) generally adopt either the cubic spinel structure or defect structures related to NiAs. It will be shown that both the metal ions and the polarizability of the anion determine which of these structures is favored. In the cubic close-packed anion array of the thiospinel
Aaron Wold, Kirby Dwight
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Photoinduced Structural Conversions of Transition Metal Chalcogenide Materials
The Journal of Physical Chemistry A, 2010The conversions of NiAs-type structures of transition metal chalcogenides (FeS and CoSe) to pyrite-type structures of dichalcogenides (FeS(2) and CoSe(2), respectively) under irradiation by HeNe laser (wavelength, 632.8 nm; intensity, 6 x 10(4) W/cm(2)) have been investigated using Raman spectroscopy.
M Y C, Teo +3 more
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