Structural and optical characterisation of silanised Dy-doped-Gd₂O₃ NPs

Abstract

In this work, we studied the optical properties of Dy-doped Gd2O3 nanoparticles (NPs) before and after their APTES functionalisation. We obtained luminescent Dy@Gd2O3 NPs (0.5, 1, and 5% mol) using...

A Comparative Study of SiO2:Tb3+@Gd2O3:Eu3+ and Its Inverted Tb3+-Eu3+ Core–Shell Phosphors

“…Figure a shows a contrast between the black edges and the bright interior due to the different electron penetrability of the cores and shells, further demonstrating the successful preparation of the core–shell sample. Figure b clearly displays the lattice fringes of the sample at higher magnification, indicating good crystallinity and interplanar distance of 0.272 and 0.311, corresponding to the (4 0 0) and (2 2 2) crystallographic planes of Gd 2 O 3 , respectively. − Due to the similar ionic radii of Eu 3+ ( r = 95.0 nm) and Tb 3+ ( r = 93.8 nm), doping with Eu 3+ ions did not modify the interplanar distance of Gd 2 O 3 .…”