Surface-enhanced luminescence of Cr³⁺-doped ZnAl₂O₄ and MgAl₂O₄ using Ag@SiO₂ and Au@SiO₂ core–shell nanoparticles

Abstract

In this work, we investigate the significant interest of chromium-doped spinels (CDS) resulting in their characteristic red photoluminescence (PL) due to the strong crystal field and the octahedral coordination of...

Photoluminescence modification of europium(iii)-doped MAl2O4 (M = Zn, Mg) spinels induced by Ag@SiO2 core–shell nanoparticles

“…However, to the best of our knowledge, there is no work where these europium-doped spinels (EuDS) were used to study the effect of these metallic NPs on the PL intensity. In our earlier report, 51 we paved the way for novel studies on PL enhancement based on the SEL of chromium-doped spinels (CDS) using metallic NPs. In this work, we investigated the effect of AgNPs on two EuDS materials: ZnAl 2 O 4 :Eu 3+ (ZAOE) and MgAl 2 O 4 :Eu 3+ (MAOE).…”