Microstructural and optical characterization of CaWO4 and SrWO4 thin films prepared by a chemical solution method

Maurera, M. A. M. A.; Souza, A. G.; Soledade, L. E. B.; Pontes, F. M.; Longo, Elson; Leite, E. R.; Varela, José Arana

doi:10.1016/j.matlet.2003.07.002

Cited by 102 publications

(61 citation statements)

References 17 publications

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“…4) BaWO4 is a potential material for stimulated Raman scattering 3) and for emission of blue luminescence. 5) There are a variety of methods used to produce alkaline earth metal tungstates, such as chemical solution reaction, 2) microemulsion-mediated hydrothermal synthesis 3) and spray pyrolysis. 4) Nano-materials have attracted interest for researchers due to their wide range of optical and electrical properties, 6) which are controlled by uniform shape and narrow size distribution.…”

Section: Introductionmentioning

confidence: 99%

Cyclic microwave-assisted synthesis and characterization of nano-crystalline alkaline earth metal tungstates

Phuruangrat

Thongtem

2008

J. Ceram. Soc. Japan

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Nano-crystalline MWO4 (M = Ca, Sr and Ba) were successfully produced using cyclic microwave radiation in propylene glycol. XRD, TEM, SAED and EDX analyses revealed the presence of nano-crystalline MWO4 containing the corresponding alkaline earth metals, W and O. Their lattice parameters and crystallite sizes were determined, and enlarged with the increase in the ionic radii of the corresponding divalent metals. Six different vibrations were detected using Raman spectroscopy and very strong W-O stretching of [WO4] 2-tetrahedrons using FTIR.

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Section: Introductionmentioning

confidence: 99%

Cyclic microwave-assisted synthesis and characterization of nano-crystalline alkaline earth metal tungstates

Phuruangrat

Thongtem

2008

J. Ceram. Soc. Japan

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“…6 X-ray diffraction ͑XRD͒ patterns were recorded on a ͑Rigaku-DMax͒ diffractometer using Cu K␣ radiation. Raman spectra were recorded on a RFS/ 100/S Bruker FT-Raman spectrometer with a Nd doped yttrium aluminium garnet laser providing excitation light at 1064 nm.…”

mentioning

confidence: 99%

Mechanisms behind blue, green, and red photoluminescence emissions in CaWO4 and CaMoO4 powders

Campos

Simões

Longo

et al. 2007

Applied Physics Letters

104

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A combined experimental and theoretical study was conducted to analyze the photoluminescence (PL) properties of ordered and disordered CaWO4 (CW) and CaMoO4 (CM) powders. Two mechanisms were found to be responsible for photoluminescence emission in CW and CM powders. The first one, in the disordered powders, was caused by oxygen complex vacancies [MO3∙VOx], [MO3∙VO•] and [MO3∙VO••], where M=W or Mo, which leads to additional levels in the band gap. The second mechanism, in ordered powders, was caused by an intrinsic slight distortion of the [WO4] or [MoO4] tetrahedral in the short range.

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“…Molybdate and tungstate are inorganic compounds which have very interesting properties for applications such as luminescent materials, electrooptic materials, scintillators and catalysts [1,2]. PbMoO 4 and PbWO 4 are classified in these groups and have application in high-energy physics.…”

Section: Introductionmentioning

confidence: 99%

Effect of lead salts on phase, morphologies and photoluminescence of nanocrystalline PbMoO4 and PbWO4 synthesized by microwave radiation

Phuruangrat

Kuntalue

Artkla

et al. 2016

Materials Science-Poland

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PbMoO 4 and PbWO 4 were successfully synthesized by microwave radiation using different lead salts (acetate, chloride, nitrate and sulfate) and Na 2 MO 4 (M = Mo, W) in propylene glycol. The products were characterized by X-ray diffraction (XRD), scanning and transmission electron microscopy (SEM, TEM), Fourier transform infrared (FT-IR), Raman spectroscopy and photoluminescence (PL) spectroscopy. In this research, morphologies, crystallization and photoluminescence of the products were influenced by the kinetics of anions, including the detection of M-O (M = Mo, W) stretching modes in the (MO 4 ) 2− tetrahedrons. Photoluminescence of PbMoO 4 synthesized from Pb(NO 3 ) 2 and of PbWO 4 synthesized from PbCl 2 showed the strongest blue emission due to the electronic diffusion in tetrahedrons at room temperature.

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Microstructural and optical characterization of CaWO4 and SrWO4 thin films prepared by a chemical solution method

Cited by 102 publications

References 17 publications

Cyclic microwave-assisted synthesis and characterization of nano-crystalline alkaline earth metal tungstates

Cyclic microwave-assisted synthesis and characterization of nano-crystalline alkaline earth metal tungstates

Mechanisms behind blue, green, and red photoluminescence emissions in CaWO4 and CaMoO4 powders

Effect of lead salts on phase, morphologies and photoluminescence of nanocrystalline PbMoO4 and PbWO4 synthesized by microwave radiation

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