Magnetic properties of large-area one-dimensional WO2 and MoO2 nanorods

Ma, Yuan‐Ron; Tsai, Chai-Chang; Lee, S. F.; Cheng, Kuo‐Sheng; Liou, Y.; Yao, Y. D.

doi:10.1016/j.jmmm.2006.02.025

Cited by 22 publications

(5 citation statements)

References 7 publications

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“…7 kJ·mol –1 less stable than the monoclinic form of the dioxide . Other theoretical studies regarding α-MoO 2 cover a wide range of various aspects. ,− It can be found in the mineral tugarinovite (named after the geochemist Alexsey Ivanovich Tugarinov) and shows a metal-like electric conductivity being unusual for transition-metal oxides. , It does not have a variety of technological applications such as MoO 3 , but there are some interesting approaches for usage as anode material in lithium-ion batteries, ,− films for energy storage, and soft-magnetic and optical materials − and as nanorods. , …”

Section: Introductionmentioning

confidence: 99%

HP-MoO₂: A High-Pressure Polymorph of Molybdenum Dioxide

et al. 2017

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High-pressure molybdenum dioxide (HP-MoO2) was synthesized using a multi-anvil press at 18 GPa and 1073 K, as motivated by previous first-principles calculations. The crystal structure was determined by single-crystal X-ray diffraction. The new polymorph crystallizes isotypically to HP-WO2 in the orthorhombic crystal system in space group Pnma and was found to be diamagnetic. Theoretical investigations using structure optimization at density-functional theory (DFT) level indicate a transition pressure of 5 GPa at 0 K and identify the new compound as slightly metastable at ambient pressure with respect to the thermodynamically stable monoclinic MoO2 (α-MoO2; ΔEm = 2.2 kJ·mol -1 ).

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Section: Introductionmentioning

confidence: 99%

HP-MoO₂: A High-Pressure Polymorph of Molybdenum Dioxide

et al. 2017

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“…Nanometric MoO 2 has attracted great technological interest because of its interesting physicochemical properties and is applied as a catalyst [13,14], an energy storing [15], soft magnetic [16], and optical [17,18] material.…”

Section: Introductionmentioning

confidence: 99%

Photoelectrochemical properties of MoO2 thin films

Dukštienė

Sinkevičiūtė

2013

J Solid State Electrochem

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Thin MoO 2 films were electrodeposited on a selenium pre-deposited SnO 2 |glass plate. The photoelectrochemical properties of MoO 2 films were investigated in 0.1 M Na 2 SO 4 solution by the ultraviolet-visible spectrophotometry, linear sweep voltammetry, and altering current impedance measurement techniques. It was found that under illumination with the incident light of λ=366 nm, the photo response of the MoO 2 |SnO 2 |glass electrode resulted from the MoO 2 layer, while the SnO 2 layer served as a sink for photogenerated charge carriers. The MoO 2 film exhibited ntype conductivity. A schematic band structure diagram of MoO 2 in 0.1 M Na 2 SO 4 solution was constructed. The flat band potential (E fb ), the donor concentration (N D ), the photogeneration current efficiency depended on MoO 2 film thickness. The [Fe(CN) 6 ] 4−/3− redox PEC cell with MoO 2 | SnO 2 |glass plate as a photoanode was constructed. Power output characteristics such as the open circuit voltage (V OC ), short circuit current (I SC ), the fill factor (FF), and the lightto-electrical conversion efficiency (η) were determined. The maximum light-to-electrical conversion efficiency exhibited by the PEC cell was 0.94 %.

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“…In this study, we are able to synthesize large-area arrays of vertical-aligned 1D NiO nanorods using the hot-filament metal-oxide vapor deposition (HFMOVD) technique. This technique has become very important, because it can be used to synthesize a variety of metal-oxide101617181920212223242526 and metal27282930 nanostructures with diverse morphological features and crystalline traits. The 1D NiO nanorods thus produced were then characterized by field-emission scanning electron microscopy (FESEM), energy dispersive spectroscopy (EDS), transmission electron microscopy (TEM), x-ray diffractometry (XRD) and ultraviolet-visible spectroscopy.…”

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An efficient methodology for measurement of the average electrical properties of single one-dimensional NiO nanorods

Patil

Devan

Lin

et al. 2013

Sci Rep

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We utilized a metal tantalum (Ta) ball-probe to measure the electrical properties of vertical-aligned one-dimensional (1D) nickel-oxide (NiO) nanorods. The 1D NiO nanorods (on average, ~105 nm wide and ~700 nm long) are synthesized using the hot-filament metal-oxide vapor deposition (HFMOVD) technique, and they are cubic phased and have a wide bandgap of 3.68 eV. When the 1D NiO nanorods are arranged in a large-area array in ohmic-contact with the Ta ball-probe, they acted as many parallel resistors. By means of a rigorous calculation, we can easily acquire the average resistance RNR and resistivity ρNR of a single NiO nanorod, which were approximately 3.1 × 1013 Ω and 4.9 × 107 Ω.cm, respectively.

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Magnetic properties of large-area one-dimensional WO2 and MoO2 nanorods

Cited by 22 publications

References 7 publications

HP-MoO₂: A High-Pressure Polymorph of Molybdenum Dioxide

HP-MoO₂: A High-Pressure Polymorph of Molybdenum Dioxide

Photoelectrochemical properties of MoO2 thin films

An efficient methodology for measurement of the average electrical properties of single one-dimensional NiO nanorods

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Magnetic properties of large-area one-dimensional WO2 and MoO2 nanorods

Cited by 22 publications

References 7 publications

HP-MoO2: A High-Pressure Polymorph of Molybdenum Dioxide

HP-MoO2: A High-Pressure Polymorph of Molybdenum Dioxide

Photoelectrochemical properties of MoO2 thin films

An efficient methodology for measurement of the average electrical properties of single one-dimensional NiO nanorods

Contact Info

Product

Resources

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HP-MoO₂: A High-Pressure Polymorph of Molybdenum Dioxide

HP-MoO₂: A High-Pressure Polymorph of Molybdenum Dioxide