2017
DOI: 10.1039/c7cp04521b
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Unexpected formation of scheelite-structured Ca1−xCdxWO4 (0 ≤ x ≤ 1) continuous solid solutions with tunable photoluminescent and electronic properties

Abstract: Design of a solid solution with tunable functionality is an attractive strategy toward realizing novel devices with multi-functionalities. In this work, a series of CaCdWO solid solutions in the entire range 0 ≤ x ≤ 1 with tetragonal scheelite structure have been successfully prepared for the first time. X-ray diffraction (XRD), Fourier transform infrared (FT-IR) and Fourier transform Raman (FT-Raman) spectroscopies indicated that all the nanocrystals have a tetragonal scheelite structure without wolframite ph… Show more

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Cited by 11 publications
(12 citation statements)
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“…Well-defined 796, 837, and 911 cm −1 peaks observed in the Raman spectra for both samples are consistent with those reported in the literature. 11 Moreover, on the one hand, the 911 cm −1 peak has been also correlated with the symmetric stretching of ←O− W−O→ bonds of the tetrahedral clusters. 11 On the other hand, the 339 and 397 cm −1 peaks observed in the Raman spectra have been associated to the symmetric and nonsymmetric bending vibrations of the CaWO 4 structure, respectively.…”
Section: Resultsmentioning
confidence: 98%
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“…Well-defined 796, 837, and 911 cm −1 peaks observed in the Raman spectra for both samples are consistent with those reported in the literature. 11 Moreover, on the one hand, the 911 cm −1 peak has been also correlated with the symmetric stretching of ←O− W−O→ bonds of the tetrahedral clusters. 11 On the other hand, the 339 and 397 cm −1 peaks observed in the Raman spectra have been associated to the symmetric and nonsymmetric bending vibrations of the CaWO 4 structure, respectively.…”
Section: Resultsmentioning
confidence: 98%
“…11 Moreover, on the one hand, the 911 cm −1 peak has been also correlated with the symmetric stretching of ←O− W−O→ bonds of the tetrahedral clusters. 11 On the other hand, the 339 and 397 cm −1 peaks observed in the Raman spectra have been associated to the symmetric and nonsymmetric bending vibrations of the CaWO 4 structure, respectively. Contractions and bending of Ca−O groups from [CaO 8 ] clusters have been reported in the literature, 21 in the region from 80 to 280 cm −1 .…”
Section: Resultsmentioning
confidence: 98%
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“…Continuous series of substitutional solid solutions can provide a variation in crystal structure and changes in the band gap values and optical properties, and an opportunity to understand the structure property relationship can thus be achieved [24] [25]. The design of a solid solution based on molybdate compounds is a promising strategy for developing novel materials [26], with the aim of improving their properties, and consequently expansion wider range of applications [27][28] [29]. In particular, Hallaoui et al [30] have studied the structural and optical properties as a function of composition x for Sr(1-x)PbxMoO4 solid solutions, showing that the photocatalytic activity of PMO and SrMoO4 is different despite the similarity of the structures.…”
Section: Introductionmentioning
confidence: 99%