12034-83-2Relevant articles and documents
Quantum linear magnetoresistance in NbTe2
Chen, Hongxiang,Li, Zhilin,Fan, Xiao,Guo, Liwei,Chen, Xiaolong
, p. 16 - 20 (2018)
NbTe2 is a quasi-2D layered semimetal with charge density wave ground state showing a distorted-1T structure at room temperature. Here we report the anisotropic magneto-transport properties of NbTe2. An anomalous linear magnetoresistance up to 30% at 3 K in 9 T was observed, which can be well explained by a quantum linear magnetoresistance model. Our results reveal that a large quasi-2D Fermi surface and small Fermi pockets with linearly dispersive bands coexist in NbTe2. The comparison with the isostructural TaTe2 provides more information about the band structure evolution with charge density wave transitions in NbTe2 and TaTe2.
125Te Moessbauer spectroscopic study of layered transition metal ditellurides with interlayer communication
Guzman, R.,Morales, J.,Tirado, J. L.,Moubtassim, M. L. Elidrissi,Jumas, J. C.,Langouche, G.
, (1995)
The 125Te Moessbauer spectroscopy of different 1T-transition metal ditellurides shows that the values of the isomer shift are dependent on the degree of the Te-Te interlayer interactions which decrease the 5p population by Te(p)-M(d) electron d
Solid-state tellurium-125 nuclear magnetic resonance studies of transition-metal ditellurides
Orion, Isabelle,Rocha, Joao,Jobic, Stephane,Abadie, Virginie,Brec, Raymond,Fernandez, Christian,Amoureux, Jean-Paul
, p. 3741 - 3748 (1997)
Solid-state 125Te NMR studies of inorganic compounds containing tellurium in oxidations states ranging from -II to VI have been made. The chemical shift tensors of Te(OH)6, TeCl4, TeO2 and elemental tellurium ha
XAFS studies of local atomic structure of niobium tellurides
Mathey, Yves,Sassoli, Herve,Purans, Juris
, p. 81 - 86 (1997)
We present XAFS (K-edge) studies of the local atomic structure around the Nb and Te ions in niobium tellurides (NbTe2, Nb3Te4 and NbTe4) in comparison with ZrTe2. Using a multi-shell best-fit analysis procedure, we have reconstructed local environments of the Nb and Te ions and compared them with the existing structural models. We found that at the Nb K-edge the XAPS data of NbTe4 are extremely sensitive to metal clustering and to the subsequent departure from the average crystallographic positions. Moreover, at Te K-edge the XAFS data allowed us to distinguish the different type of Te-Te bonds, for instance: the dimer (Te-Te: 2.9 A) and the squares (Te-Te: 3.3 A) in NbTe4, the interlayer and intralayer (Te-Te: 2.9-4.0 A) in NbTe2, through their Debye-Waller characteristics. In addition, a comparative analysis of Debye-Waller factors obtained in the different coordination shells (Te-Te, Te-Nb, Nb-Te and Nb-Nb) shows an evidence of correlation in the vibrational motion.
Cytotoxicity of Group 5 Transition Metal Ditellurides (MTe2; M=V, Nb, Ta)
Chia, Hui Ling,Latiff, Naziah Mohamad,Sofer, Zden?k,Pumera, Martin
, p. 206 - 211 (2018)
Much research effort has been put in to study layered compounds with transition metal dichalcogenides (TMDs) being one of the most studied compounds. Due to their extraordinary properties such as excellent electrochemical properties, tuneable band gaps, a
Synthesis and Structure of Quasi-One-Dimensional Niobium Tetrasulfide NbS4
Poltarak, Anastasiia,Poltarak, Pavel,Enyashin, Andrey,Komarov, Vladislav,Artemkina, Sofya,Fedorov, Vladimir
supporting information, p. 2783 - 2789 (2022/02/09)
The binary niobium sulfide NbS4 was synthesized as a crystalline phase. We showed that NbS4 can be formed from Nb metal, from defect niobium sulfide Nb1.14S2, or from some other niobium dichalcogenides in reactions with excess sulfur in an evacuated ampule at 440 °C. The crystal structure of NbS4 (monoclinic space group C2/c, a = 13.126(2) ?, b = 10.454(1) ?, c = 6.951(1) ?, β = 111.939(5)°) is a packing of infinite chains {NbS4}1∞, analogous to VS4. In the chains, Nb atoms are in a tetragonal-antiprismatic coordination of sulfur atoms of disulfide groups (S2)2- short Nb···Nb contacts (2.896 ?) alternating with longer ones (3.278 ?) appear within the chains at 150 K. According to density functional theory calculations, NbS4 is a thermodynamically stable compound, a nonmagnetic semiconductor. NbS4 is a new member of the family of quazi-one-dimensional compounds, group 5 metal polychalcogenides, well-known for their interesting electrophysical properties. The synthesis and crystal structure as well as the thermal stability and lattice dynamics of NbS4 are discussed here.
Dual-responsive ultrathin 1T-phase niobium telluride nanosheet-based delivery systems for enhanced chemo-photothermal therapy
Chen, Chao,Chen, Haolin,Guo, Zhouyi,Liu, Hao,Liu, Xiaoying,Liu, Zhiming,Mo, Luoqi
, p. 8109 - 8120 (2021/10/14)
1T-phase niobium telluride (NbTe2) nanosheets are becoming increasingly important in emerging fields, such as spintronics, sensors and magneto-optoelectronics, due to their excellent physical and chemical properties. However, exploration on the
Ba3TM2Se9 (TM = Nb, Ta): Synthesis and characterization of new polyselenides
Chung, Ming-Yan,Lee, Chi-Shen
supporting information, p. 80 - 84 (2014/01/23)
New ternary polyselenides Ba3TM2Se9 (TM = Nb, Ta) were synthesized through a solid-state reaction, and their structures were characterized using single-crystal X-ray diffraction. These compounds crystallized into a new structural type with a monoclinic space group P2 1/c. The structures were constructed from distorted, close-packed layers of ∞3[BaSe3]3.33- that incorporated TM atoms at octahedral sites and contained [(TM5+) 2(Se2-)7(Se22-)] units. Diffuse reflectance spectra and electronic resistivity measurements indicated semiconducting properties and optical band gaps of 1.3 eV for Ba 3Nb2Se9 and 1.6 eV for Ba3Ta 2Se9. Raman spectra were used to investigate the interatomic interactions. Calculations of the electronic structure verified the semiconducting behavior and bonding interaction of short Se-Se contacts.
Syntheses and structures of niobium copper chalcogenido clusters (see abstract)
Lorenz,Fenske
, p. 4402 - 4406 (2007/10/03)
Silylated chalcogenides (Me3Si)2E (E = S, Se, Te) grant access to novel Nb - Cu chalcogenido clusters with as yet unknown molecular structures. Dimetallic Nb - Cu selenido clusters [Cu4Nb6Se12O (PMes
