Novel polyhedron Y1−xDyxVO4 nanocrystals: hydrothermal synthesis and luminescence properties

• Published in: Journal of nanoparticle research : an interdisciplinary forum for nanoscale science and technology 2013-08, Vol.15 (8)
• Main Authors: Dong, Hui, Liu, Guocong, Liang, Dawen, Wei, Qinming, Zhou, Fangli, Li, Xianfeng
• Format: Article
• Language: English
• Subjects: Characterization and Evaluation of Materials; Chemical synthesis methods; Chemistry and Materials Science; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Condensed matter: structure, mechanical and thermal properties; Cross-disciplinary physics: materials science; rheology; Exact sciences and technology; Inorganic Chemistry; Lasers; Materials Science; Methods of nanofabrication; Nanocrystalline materials; Nanoscale materials and structures: fabrication and characterization; Nanoscale materials: clusters, nanoparticles, nanotubes, and nanocrystals; Nanotechnology; Optical Devices; Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation; Optical properties of low-dimensional, mesoscopic, and nanoscale materials and structures; Optics; Photonics; Physical Chemistry; Physics; Research Paper; Structure of solids and liquids; crystallography
• ISSN: 1388-0764; 1572-896X
• DOI: 10.1007/s11051-013-1854-4

Novel polyhedron Y 1− x Dy x VO 4 (0 ≤  x  ≤ 0.1) nanocrystals were synthesized via a hydrothermal route in ethylene glycol–water mixtures at 150 °C for 25 h. The characterizations from X-ray diffraction, transmission electron microscopy, high-resolution transmission electron microscopy, and photoluminescence spectra revealed that polyhedron-like Y 1− x Dy x VO 4 single crystals with size of 20–100 nm were structurally uniform. The as-prepared polyhedron Y 1− x Dy x VO 4 performed excellent chromaticity and higher ratio of yellow ( 4 F 9/2  →  6 H 13/2 ) to blue ( 4 F 9/2  →  6 H 15/2 ) emissions compared with Y 1− x Dy x VO 4 irregular nanoparticles, which were mainly due to low site symmetry resulting from the crystallite size and crystallization increased. The formation mechanism had been proposed. Crucial influencing factors such as the pH value, reaction temperature, and time on the morphologies of the final products had also been discussed. The newly discovered uniform morphology of the products maybe has good potential in related future applications.