The Ligand Fields Characterizations within Erbium-Tellurite Glass Network via Gold Nanoparticles Concentration Variation

Abstract:

Glass samples of composition 79TeO₂ – 15PbO – 5PbCl₂ – 1Er₂O₃ – (x)AuCl₃ with (0.0 ≤ x ≤ 0.1 mol%) were successfully synthesized by using melt-quenching technique. The impacts of gold nanoparticles (GNPs) concentration in stimulating the ligand field interaction inside the erbium-tellurite glass network were inspected. Amorphous nature of the sample was confirmed through XRD pattern. TEM images display the existence of GNPs with average diameter ~1.24 nm. Optical absorption spectra were recorded in the UV-Visible range. The absorption displays several prominent peaks corresponding to the transitions from the ground state to the excited states of Er³⁺ ion. The compositional dependence of the ligand parameters in terms of crystal field strength and Racah parameter were determined.

• Periodical: Materials Science Forum (Volume 846)
• Pages: 137-141
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.846.137
• Online since: March 2016
• Authors: Ezza Syuhada Sazali, M.R. Sahar*, R. Arifin, S.K. Ghoshal, Md Supar Rohani
• Keywords: Absorption, Crystal Field Strength, Gold Nanoparticles, Racah Parameter, TEM

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