| Autor: |
Niaz, Usman, Hemat, Sherwali, Jamil, Ayesha, Aziz, Muhammad Safwan |
| Zdroj: |
Indian Journal of Physics; Dec2024, Vol. 98 Issue 14, p4989-4995, 7p |
| Abstrakt: |
In recent years, the synthesis of silver nanoparticles (Ag NPs) has garnered significant interest due to their unique structural and optical properties. Pulsed laser ablation in liquid (PLAL) has emerged as an environmentally friendly, efficient, and remotely controllable method for fabricating metallic nanoparticles. In this study, we investigated the effect of confinement geometry on the optical and structural properties of Ag NPs produced by PLAL. Ag NPs were synthesized under different geometric boundary conditions and characterized using a range of techniques. Photoluminescence spectroscopy revealed that an increase in particle size led to a decrease in intensity due to carrier recombination, with the emission peak detected at approximately 350 nm when subjected to laser excitation at 250 nm. UV–Vis spectroscopy showed that the surface plasmon resonance (SPR) wavelength of Ag NPs synthesized without confined geometry was located at 400 nm, in agreement with the literature. We found that increasing the size of the confined geometry resulted in a higher SPR peak intensity and peak position. X-ray diffraction (XRD) analysis confirmed that all samples (Ag, Ag–dAl confine geometry) were polycrystalline. High-resolution transmission electron microscopy (HR-TEM) revealed a small size distribution of spherical particles with an average size of 9.6 nm, as determined by lognormal fitting measurement. Fourier transform infrared (FTIR) spectroscopy confirmed the purity of the synthesized Ag NPs. Our findings demonstrate that confinement geometry plays a crucial role in controlling the optical and structural properties of Ag NPs synthesized by PLAL, making it a promising approach for producing high-quality Ag NPs for various applications. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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