The main objective of this work is to use a mathematical model to predict the nanoparticle size. Lithium borate glass with Ag nanoparticles were synthetized by traditional melt-quenching technique. Morphology analysis is presented with TEM micrographs and X-ray diffraction patterns. UV–Vis-IR absorption spectra were recorded and used to estimate the nanoparticle size by Mie theory. Experimental mesurments agrees with the employeed theory.
Glass matrices doped with rare earths and Cu were synthesized using copper concentration as the control parameter. The amorphous phase of lithium borate was corroborated by X-Ray diffraction (XRD) while size distribution of Nanoparticles was obtained by transmittance electron microscopy (TEM) and crystal phase of Cu nanoparticles was obtained by high resolution transmittance electron microscopy (HRTEM). For photoluminescence, characterizations used were absorbance, photoluminescence emission (PL) and experimental decay times; from the data obtained we performed Judd–Ofelt analysis. With absorbance and PL characterizations in conjunction with CIE 1931, efficiency and shift to white light emission were evaluated. The insights gained from this study have significant implications for future research focused on enhancing the photoluminescence properties of rare earth-doped systems. A comprehensive understanding of the underlying mechanisms behind these phenomena enables us to leverage plasmon effects in similar systems, leading to diverse applications such as color tuning emission.
Lithium Diborate (Li2O-2B2O3) glass doped with Sm3+ and silver nanoparticles (AgNP) were prepared by melt quenching technic. The morphological and optical properties are investigated. Transmission Electronic Microscopy (TEM) confirms silver nanoparticles presence, X- Ray Diffraction (XRD) verify the amorphous structure of the vitreous phase. UV–Vis–NIR absorption spectra showed Sm3+ absorption enhancement due to plasmon effect. The emission study confirms the luminescence enhances 2.53 times with the silver nanoparticles, due to energy transfer.
A family of samples of lithium borate glass doped with rare earths (erbium, ytterbium, dysprosium) and containing metallic nanoparticles were synthetized by melt-quenching technique. SEM micrograph is presented. X-ray diffraction patterns of all samples reveal the amorphous structure, which confirms their non-crystalline nature. Physical properties (such as density, molar volume, and boron-boron separation) of amorphous materials and their modifications when the metallic nanoparticles are added in the matrices are shown. UV–Vis-IR absorption spectra of all samples were recorded and display the characteristic bands of the used rare earths; all absorption bands present an enhancement with increasing plasmonic concentration. Emission spectra of doped samples were collected in the temperature range from 30 to 180 Celsius degrees. The results of emission under temperature indicate that the addition of plasmons in glass matrices are responsible for emission stabilization in samples when the temperature is increased.
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