Effect of Nd³⁺ Ion on Bismuth Borosilicate Glass Properties

Abstract

This paper reports neodymium doped bismuth borosilicate glasses in composition (40-x)B2O3-40Bi2O3-20SiO2-xNd2O3 where x = 0, 0.5, 1.0, 1.5, 2.0 and 2.5 mol%, have been prepared by melt quenching technique and are characterized through physical properties structural properties, optical absorption spectra and emission spectra measurements. The density is found to increase with the increase in concentration of Nd2O3. The molar volumes of glass decrease where concentration of Nd2O3 where concentration of Nd2O3 is 0-0.5 mol% and beyond 0.5 mol% that molar volumes were increased. The absorption spectra of Nd3+-doped glass centered at 512 nm (4I9/2→2K13/2+4G9/2), 526 nm (4I9/2→4G7/2), 584 nm (4I9/2→4G5/2+2G7/2), 625 nm (4I9/2→2H11/2), 681 nm (4I9/2→4F9/2), 747 nm (4I9/2→4F7/2+4S3/2), 804 nm (4I9/2→4F5/2+2H9/2) and 877 nm (4I9/2→4F3/2) have been observed. The emission spectra of glass were also investigated.

Photoluminescent neodymium-doped ZnO nanocrystals prepared by laser ablation in solution for NIR-II fluorescence bioimaging

“…From the analysis of the NPs absorption spectra near the edge of the ZnO fundamental absorption band (about 375 nm), it can be concluded that the additional laser irradiation does not significantly change the bandgap of the sample but can improve the quality of the crystal lattice, exhibiting a sharper absorption edge near 375 nm. Besides the absorption band of ZnO, several additional absorption peaks were found in the spectra, that can be attributed to the transitions of neodymium ion from the 4 I 9/2 ground state to the following excited levels: 2 K 13/2 + 4 G 9/2 , (at 512 nm), 4 I 9/2 → 4 G 7/2 + 4 G 9/2 + 2 K 13/2 (522 nm), 4 I 9/2 → 4 G 5/2 + 2 G 7/2 (575 nm), 4 I 9/2 → 4 F 7/2 + 4 S 3/2 (740 nm) and 4 I 9/2 → 4 F 5/2 + 2 H 9/2 (794 nm) ( Figure 4 a) [ 27 , 28 ].…”