Pd nanometal inclusion in phosphate glass via PdO and Si: Impact on Sm3+ photoluminescence

XANES analysis of phosphate glasses melted with Tb4O7 and SnO: evaluating the impact of valence states on structural, thermal, and luminescent properties

“…The assignment for the various features is achieved in agreement with the literature as reported for similar phosphate-based glasses. 22,23,32,33 Taken as reference, the Tb glass exhibits towards the low energy region a band around 685 cm −1 credited to the in-chain symmetric stretching vibrations in P–O–P bridges, ν s (POP), in Q 2 tetrahedral units (PO 4 tetrahedra with 2 bridging oxygens, BOs). The small feature observed around 1006 cm −1 is attributed to the symmetric stretch, ν s (PO 3 2− ), in non-bridging oxygens (NBOs) pertaining to Q 1 units (PO 4 tetrahedra with 1 BO).…”

“…A binary barium phosphate glass matrix previously studied with other metals and rare-earths was used as host. [21][22][23] The glasses were synthesized by melt-quenching with fixed Tb 4 O 7 amounts at 0.5 mol% and increasing SnO content added up to 5 mol% (both relative to network former P 2 O 5 ). The glasses were then characterized by X-ray diffraction (XRD) to confirm amorphous nature, and by X-ray absorption near-edge structure (XANES) spectroscopy at the Sn K-edge and Tb L 3 -edge for tin and terbium speciation analysis.…”