Additive assisted hydrothermal synthesis, characterization and optical properties of one dimensional DyPO 4 :Ce 3+ nanostructures

Formation of zircon‐type (Zr,Ti)1−x(Dy)x(SiO4)1−x(PO4)x solid solution and their optical and magnetic characteristics

“…The absorption spectra until 20DPZS showed five transitions, namely, at 6 F 11/2 + 6 H 9/2 , 6 F 9/2 + 6 H 7/2 , 6 F 7/2 , 6 F 5/2 , and 6 F 3/2 . However, enhanced Dy 3+ /PO 4 3− additions in 30DPZS, 40DPZS, and 50DPZS revealed additional transitions, namely, at 4 F 9/2 , 4 F 15/2 , 4 F 7/2 + 4 I 13/2 , and 6 P 7/2 32 , 35 , 36 . Further, all the investigated systems recorded an optical bandgap of ≈3 eV from the Tauc plot (Figure S1), whereas enhanced Dy 3+ /PO 4 3− additions recorded a secondary bandgap of ≈3.4 eV in the case of 30DPZS, 40DPZS, and 50DPZS.…”

“…On the whole, 10 transitions have been determined typically to 6 32,35,36 Further, all the investigated systems recorded an optical bandgap of ≈3 eV from the Tauc plot (Figure S1), whereas enhanced Dy 3+ /PO 4 3− additions recorded a secondary bandgap of ≈3.4 eV in the case of 30DPZS, 40DPZS, and 50DPZS.…”

“…Further, the vibrational bands characteristics of PO 4 tetrahedra are also determined at 645 and 522 cm −1 . Meanwhile, the enhanced Dy 3+ /PO 4 3− additions in SiO 2 -ZrO 2 system, especially in the case of 40DPZS and 50DPZS, determined a noteworthy distortion in the 620-1350-cm −1 wavelength region resulting in the emergence of new bands at 1153 and 637 cm −1 , a characteristic of PO 4 3− bending mode, thus indicating the crystallization of low symmetry DyPO 4 phase [32][33][34].…”

Dysprosium and Holmium Vanadate Nanoprobes as High-Performance Contrast Agents for High-Field Magnetic Resonance and Computed Tomography Imaging

“…), (ii) particle size between about 20 and 100 nm to control circulation time, since smaller particles are quickly eliminated through the kidney and the larger ones are eliminated by the reticuloendothelial system, the spleen, or the liver, (iii) aggregation in the physiological environment should be avoided to meet the above size criteria, and (iv) lack of toxicity. However, most of the few reported procedures for the synthesis of Dy or Ho vanadate NPs yield particles with at least one dimension much higher than 100 nm, − NPs with broad size distribution, or with an apparently high degree of aggregation, , which precludes their use as MRI CAs.…”