Gold nanospheres and gold nanorods of different sizes have been synthesized by a seed-mediated growth approach. They have been characterized by TEM, UV-Vis spectroscopy, and the photothermal effect of spheres has been tested. By adding a dimethylformamide solution of polyvinylpyrrolidone and tetrachloroauric acid to the nanoparticles samples, an interesting nano-shape, composed of a quasi-spherical core with copious spikes (core size ranging from 50 to 100 nm and spikes from 15 to 50 nm), just remembering the sea urchins, has been obtained. Depending on the starting sample of nanoparticles (spheres or rods), the size of the core changes, while there are slight variations in the spikes. Plasmonic features from the visible to IR range of the electromagnetic spectrum have been recorded, and an increase in the photothermal effect was observed enlarging the nanourchins core dimensions.
Gold Sea Urchin-Shaped Nanoparticles: Synthesis and Characterization of Energy Transducer Candidates
Candreva, A;Morrone, E;La Deda, M
2023-01-01
Abstract
Gold nanospheres and gold nanorods of different sizes have been synthesized by a seed-mediated growth approach. They have been characterized by TEM, UV-Vis spectroscopy, and the photothermal effect of spheres has been tested. By adding a dimethylformamide solution of polyvinylpyrrolidone and tetrachloroauric acid to the nanoparticles samples, an interesting nano-shape, composed of a quasi-spherical core with copious spikes (core size ranging from 50 to 100 nm and spikes from 15 to 50 nm), just remembering the sea urchins, has been obtained. Depending on the starting sample of nanoparticles (spheres or rods), the size of the core changes, while there are slight variations in the spikes. Plasmonic features from the visible to IR range of the electromagnetic spectrum have been recorded, and an increase in the photothermal effect was observed enlarging the nanourchins core dimensions.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
