Magnetic Semiconducting Chalcogenide Spinels: Preparation and Physical Chemistry

Федоров, В. А.; Kesler, Ya. A.; Zhukov, E. G.

doi:10.1023/b:inma.0000008887.85985.6b

Cited by 21 publications

(9 citation statements)

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“…The selenium analog, CuCr 2 Se 4 , also displays a ferromagnetic behavior and has a pronounced magneto-optic Kerr effect at room temperature. In relation to NCs, slightly different magnetic activities were reported, depending on the NC synthetic method which was employed.…”

Section: Functional Propertiesmentioning

confidence: 99%

Compound Copper Chalcogenide Nanocrystals

et al. 2017

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This review captures the synthesis, assembly, properties, and applications of copper chalcogenide NCs, which have achieved significant research interest in the last decade due to their compositional and structural versatility. The outstanding functional properties of these materials stems from the relationship between their band structure and defect concentration, including charge carrier concentration and electronic conductivity character, which consequently affects their optoelectronic, optical, and plasmonic properties. This, combined with several metastable crystal phases and stoichiometries and the low energy of formation of defects, makes the reproducible synthesis of these materials, with tunable parameters, remarkable. Further to this, the review captures the progress of the hierarchical assembly of these NCs, which bridges the link between their discrete and collective properties. Their ubiquitous application set has cross-cut energy conversion (photovoltaics, photocatalysis, thermoelectrics), energy storage (lithium-ion batteries, hydrogen generation), emissive materials (plasmonics, LEDs, biolabelling), sensors (electrochemical, biochemical), biomedical devices (magnetic resonance imaging, X-ray computer tomography), and medical therapies (photochemothermal therapies, immunotherapy, radiotherapy, and drug delivery). The confluence of advances in the synthesis, assembly, and application of these NCs in the past decade has the potential to significantly impact society, both economically and environmentally.

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Section: Functional Propertiesmentioning

confidence: 99%

Compound Copper Chalcogenide Nanocrystals

et al. 2017

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“…This has been observed in CuCrTiS 4 [2] and CuCrZrS 4 [5] spinels, which present a marked effect on their magnetic properties due to the presence of the substituent cation in position B. These types of spinels have gained attention in recent years since they exhibit a rich variety of physical phenomena, including colossal magnetoresistance, giant red-shift of the absorption edge, magnetic field-induced structural transformation, multiferroicity, spin and orbital frustration among other properties [6].…”

Section: Introductionmentioning

confidence: 95%

RAMAN CHARACTERIZATION OF CuCr2-xSnxS4 SPINELS

Valencia-Gálvez

Peña²,

Moris

et al. 2019

J. Chil. Chem. Soc.

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Polycrystalline thiospinels CuCr 2-x Sn x S 4 (x = 0.4, 0.8, 1.0 and 1.4) were synthesized via conventional solid-state reaction. The samples were characterized by powder X-ray diffraction (XRD), energy-dispersive X-ray analysis (SEM-EDS) and Raman spectroscopy. All the samples were indexed in the space group. The Raman spectra confirmed the structure of normal spinel type with five characteristic signals for the active modes in Raman. Magnetic measurements, performed for the phases with x = 0.8 and 1.0, showed irreversible antiferromagnetism with dominant ferromagnetism and spin glass behavior.

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“…; X = S, Se, and Te), have been limited. This is in part because of the difficulties associated with solution-based synthesis of the chalcospinels, which are composed of transition metal elements that commonly exist in variable oxidation states with limited source of suitable precursors. , …”

Section: Introductionmentioning

confidence: 99%

“…This is in part because of the difficulties associated with solution-based synthesis of the chalcospinels, which are composed of transition metal elements that commonly exist in variable oxidation states with limited source of suitable precursors. 18,19 In bulk form, the chromium-based chalcospinels exhibit unusual magnetic properties resulting from exchange and superexchange interactions between the Cr 3+ ions having a halffilled t 2g ground state (S = 3/2) with no charge and orbital degrees of freedom. 20,21 Moreover, depending on the nature of A-site cation(s), they display metallic, semiconducting, or insulating characteristics resulting from strong electronic correlation combined with a strong coupling of the structural and electronic degrees of freedom.…”

Section: ■ Introductionmentioning

confidence: 99%

Synthesis, Formation Mechanism, and Magnetic Properties of Monodisperse Semiconducting Spinel CdCr₂S₄ Nanocrystals via a Facile “Seed-Mediated” Growth Method

et al. 2018

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The chalcogenide spinel CdCr 2 S 4 is a well-established ferromagnetic semiconductor that exhibits unique properties and is a promising candidate for spintronic applications. With band gap in the visible wavelength region, CdCr 2 S 4 nanocrystals offer the exciting possibility of tailoring both the optical and magnetic properties with precise morphology control. However, the synthesis of monodisperse CdCr 2 S 4 nanocrystals is challenging and has not been reported. A unique "seed-mediated" growth process has been developed for the synthesis that involves using cubic-phase CdS, which has a face-centered cubic crystal structure similar to that of CdCr 2 S 4 , as a "seed" to react with CrCl 3 •6H 2 O in a solution mixture of 1-dodecanethiol and 1-octadecene. Remarkably, hexagonal-phase CdS is ineffective as a "seed" for formation of the desired product. A mechanism for formation of monodisperse CdCr 2 S 4 nanocrystals by the selective growth process is proposed, and the structural and magnetic properties of the synthesized nanocrystals are presented. The novel synthetic strategy can be exploited for the controlled formation of other complex magnetic chalcogenides.

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Magnetic Semiconducting Chalcogenide Spinels: Preparation and Physical Chemistry

Cited by 21 publications

References 1 publication

Compound Copper Chalcogenide Nanocrystals

Compound Copper Chalcogenide Nanocrystals

RAMAN CHARACTERIZATION OF CuCr2-xSnxS4 SPINELS

Synthesis, Formation Mechanism, and Magnetic Properties of Monodisperse Semiconducting Spinel CdCr₂S₄ Nanocrystals via a Facile “Seed-Mediated” Growth Method

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Magnetic Semiconducting Chalcogenide Spinels: Preparation and Physical Chemistry

Cited by 21 publications

References 1 publication

Compound Copper Chalcogenide Nanocrystals

Compound Copper Chalcogenide Nanocrystals

RAMAN CHARACTERIZATION OF CuCr2-xSnxS4 SPINELS

Synthesis, Formation Mechanism, and Magnetic Properties of Monodisperse Semiconducting Spinel CdCr2S4 Nanocrystals via a Facile “Seed-Mediated” Growth Method

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Synthesis, Formation Mechanism, and Magnetic Properties of Monodisperse Semiconducting Spinel CdCr₂S₄ Nanocrystals via a Facile “Seed-Mediated” Growth Method