| Abstrakt: |
In this work, bismuth borosilicate glasses were prepared with a molar composition of 40Bi2O3:40B2O3:20SiO2 and dispersed with 3 × 109 gold nanoparticles of different sizes (10 nm, 40 nm, and 100 nm) using the conventional melt quenching technique. The obtained glass samples were subjected to various characterisation techniques, including X-ray diffraction (XRD), field-enhanced scanning electron microscopy (FESEM), high-resolution transmission electron microscopy (HRTEM), Fourier transform infrared spectroscopy (FTIR), differential thermal analysis (DTA), UV‒Vis–NIR spectroscopy and photoluminescence analysis, to investigate the influence of particle size on structural, morphological, thermal, and optical properties. Additionally, the CIE coordinates, CCT values, and colour purity analysis were carried out to assess the potential of the prepared material as a source of white light. XRD confirms the amorphous nature of prepared glasses. HRTEM revealed the splitting of gold nanoparticles into smaller particles of size 5 nm, which then recombined to form larger grains (178 nm), as observed in the FESEM results. Furthermore, the high thermal stability of the glasses, indicated by thermal analysis, suggests potential applications in optical fibre formation. The emission results showed that as the size of the gold nanoparticles dispersed in the glass increased, the photoluminescence emission shifted toward the white light region making the material suitable for light sources. [ABSTRACT FROM AUTHOR] |
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