Rapid microwave-enhanced hydrothermal synthesis and shape evolution of uniform NaGdF4:Yb, Er (Tm/Ho) nanocrystals with upconversion and paramagnetic properties
Date
2012-06-08Author
Wang, Dong
Ren, Lei
任磊
Zhou, Xi
Wang, Xiao-zhong
Zhou, Jun
Han, Yu
Kang, Ning
Collections
- 化学化工-已发表论文 [14237]
Abstract
An efficient microwave-enhanced hydrothermal synthesis strategy was developed for the rapid synthesis of beta-NaGdF4:Ln(3+) (Ln = Yb, Er/Tm/Ho) nanocrystals (NCs) with multicolour upconversion luminescence and paramagnetic properties. It has been found that the uniform beta-NaGdF4:Ln(3+) NCs could be rapidly formed within a few minutes at 160 degrees C and the shape of the NCs can be manipulated from uniform rod-like to spherical just by tuning the initial reactants' concentration. In comparison to conventional hydrothermal routes, a burst homogeneous nucleation and higher growth rate as well as enhanced dimensional homogeneity of the NaGdF4:Ln(3+) was achieved in microwave synthesis. A microwave-heating-based classical crystallization mode and surfactant-assisted anisotropic growth mechanism were proposed for the formation of beta-NaGdF4:Ln(3+) NCs.
Citation
NANOTECHNOLOGY,2012,23(22)URI
http://dx.doi.org/10.1088/0957-4484/23/22/225705WOS:000305160300018
https://dspace.xmu.edu.cn/handle/2288/15268