Synthesis, characterization and structural control of nano crystalline molybdenum oxide MoO3 single phase by low cost technique

Afify, H. H.; Hassan, S.A.; Abouelsayed, A.; Demian, S. E.; Zayed, H. A.

doi:10.1016/j.matchemphys.2016.03.031

Cited by 19 publications

(9 citation statements)

References 39 publications

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“…In the literature, it is mentioned that an increase in the calcination temperature at same crystallite phase can decrease the lattice parameters and eventually decrease the crystallite size. It is also reported that by increasing the calcination temperature the probability of the Mo +6 oxidation state increases. Low temperatures favor Mo +4 and Mo +5 oxidation states because of electron trapping in the oxygen vacancies.…”

Section: Resultsmentioning

confidence: 93%

Effect of Calcination Temperature on the Structural, Thermodynamic, and Optical Properties of MoO₃ Nanoparticles

Ali

Farrukh

2017

J Chinese Chemical Soc

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Temperature dependence of the structural, thermodynamic, and optical properties of MoO 3 nanoparticles synthesized using sol-gel and sonication methods were studied. MoO 3 nanoparticles showed variation in crystallite shape from hexagonal to orthorhombic and crystallite size in the range 3.05-5.21 nm with bandgap in the range 4.11-4.36 eV with change in the calcination temperature and the method of synthesis. Rietveld refinement of the X-ray diffraction (XRD) data confirmed the crystallite phase transition with space group PE and Pbnm with change in the lattice parameter ratio. Activation energy was calculated using XRD and TGA-DSC (thermogravimetry-differential thermal analysis) data and was found to be close to 4 kJ/mol. The bandgap fluctuation was due to the size dependence of the blue shift, which indicates strong quantum confinement due to the Bohr radius effect. Optical parameters such as the extinction coefficient, refractive index, optical conductivity, dielectric functions, and Urbach energy were calculated and found to depend on electron-phonon interactions.

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Section: Resultsmentioning

confidence: 93%

Effect of Calcination Temperature on the Structural, Thermodynamic, and Optical Properties of MoO₃ Nanoparticles

Ali

Farrukh

2017

J Chinese Chemical Soc

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Section: Amorphous Materials With Lsprmentioning

confidence: 79%

“…Similar to the above discussion, Afify et al. also studied the effect of composition and crystallinity on the tunable plasmonics of amorphous MoO 3 films (Figure d–f) . Upon increasing the substrate deposition temperatures, the absorption peaks showed a decrease in intensity.…”

Section: Amorphous Materials With Lsprmentioning

confidence: 99%

Amorphous Materials for Enhanced Localized Surface Plasmon Resonances

Zhu

2018

Chemistry An Asian Journal

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The discovery of localized surface plasmon resonance (LSPR) in semiconductor nanocrystals has initiated a new field in plasmonics. Plasmonic nanocrystals in particular have seen rapid development in recent years because they are a class of materials with unique photoelectronic properties. At present, a growing number of amorphous plasmonic materials has been steadily capturing scientific interest, though only a few of these are well characterized. Here we focus on recent developments in state-of-the art experiments and explore the vast library of plasmonic properties in amorphous materials, including their application fields and optical spectral range. Taken together, the growing regime of amorphous material plasmonics offers enticing avenues for harnessing light-matter interactions from the visible to the terahertz region, with new potential for optical manipulation beyond what can be accomplished using traditional crystal materials.

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“…This oxide, in parallel with tungsten oxide (WO 3 ), is one of the most studied electrochromic materials [ 3 , 5 ]. Several techniques of deposition have been used to grow MoO 3 films such as sputtering [ 8 , 9 , 10 ], thermal evaporation [ 11 ], sol-gel [ 12 , 13 ], electron beam evaporation [ 13 , 14 ], chemical vapour deposition [ 15 , 16 ], pulsed laser deposition [ 17 , 18 ], spray pyrolysis [ 19 , 20 ] and atomic layer deposition [ 21 , 22 ]. However, the electrochromic performance of a device based on these films is still a big scientific and technological challenge.…”

Section: Introductionmentioning

confidence: 99%

Molybdenum Oxide Thin Films Grown on Flexible ITO-Coated PET Substrates

et al. 2021

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Molybdenum oxide thin films were deposited on stiff and flexible substrates by reactive DC magnetron sputtering. Two sets of samples were prepared. The first with different O2/Ar flow rate ratios and the second, fixing the oxygen content, with different time of deposition. As the O2/Ar flow rate ratio varies from 0 up to 0.56, a threshold was found, ranging from crystalline to amorphous nature, and from a nontransparent appearance with metallic-like electrical conductivity to transparent and dielectric behaviour. From the second set, all transparent, the MoOx films present a compact/dense and featureless morphology with thickness from 190 up to 910 nm, depending on the time of deposition. Their structure was corroborated by XPS and Rutherford Backscattering Spectrometry (RBS) and density measurements were performed by RBS and X-ray reflectivity (XRR), revealing a value of 2.4 g/cm3. The surface roughness is in the order of a few nanometers and the maxima optical transmission, in the visible range, is around 89%. Electrochemical cyclic voltammograms showed noticeable color reversibility and reproducibility on the flexible substrates opening new framework possibilities for new electrochomic devices.

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Synthesis, characterization and structural control of nano crystalline molybdenum oxide MoO3 single phase by low cost technique

Cited by 19 publications

References 39 publications

Effect of Calcination Temperature on the Structural, Thermodynamic, and Optical Properties of MoO₃ Nanoparticles

Effect of Calcination Temperature on the Structural, Thermodynamic, and Optical Properties of MoO₃ Nanoparticles

Amorphous Materials for Enhanced Localized Surface Plasmon Resonances

Molybdenum Oxide Thin Films Grown on Flexible ITO-Coated PET Substrates

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Synthesis, characterization and structural control of nano crystalline molybdenum oxide MoO3 single phase by low cost technique

Cited by 19 publications

References 39 publications

Effect of Calcination Temperature on the Structural, Thermodynamic, and Optical Properties of MoO3 Nanoparticles

Effect of Calcination Temperature on the Structural, Thermodynamic, and Optical Properties of MoO3 Nanoparticles

Amorphous Materials for Enhanced Localized Surface Plasmon Resonances

Molybdenum Oxide Thin Films Grown on Flexible ITO-Coated PET Substrates

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Product

Resources

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Effect of Calcination Temperature on the Structural, Thermodynamic, and Optical Properties of MoO₃ Nanoparticles

Effect of Calcination Temperature on the Structural, Thermodynamic, and Optical Properties of MoO₃ Nanoparticles