Speaker
Description
Nanomaterials have recently attracted increased attention due to their use in many applications, including solar energy conversion, sensors, transparent electrodes, and catalysis. The grain size of these materials plays a crucial role in determining their optical properties. Size-dependent nanomaterials have various potential applications in optoelectronics, color displays, lasers, biological and medical labeling. Metal nanoparticles, however, have emerged as a new strategy for enhancing luminescent properties through their well-studied surface plasmonic resonance behavior. Surface plasmon resonance can generate a strong electromagnetic field at the surface of metal nanoparticles, thereby enhancing the local density of optical states. These properties have been extensively investigated for fluorescence enhancement.
This work investigated the effects of Au nanoparticles on the photoluminescence of Eu ions doped CaF2 nanomaterials. The structural analysis was done using X-ray diffraction. X-ray photoelectron spectroscopy was used to identify the elemental composition of the material and the obtained CaF2:Eu nanomaterials displayed uniform size distributions. The CaF2:Eu nanomaterials showed emission from both Eu2+ and Eu3+ oxidation states under ultraviolet excitation. The Eu2+ emission steadily enhanced with Au concentrations. The luminescence properties suggest that the material has the potential for various applications, including sensors, color display, and optoelectronics.
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