Au nanoparticle-decorated TiO2 nanospheres produced by laser reshaping in water

Gurbatov, S.; Kulinich, S.A.; Kuchmizhak, A.

Авторы: Gurbatov S., Kulinich S.A., Kuchmizhak A.
Журнал: Solid State Phenomena
Том: 312
Год издания: 2020
Первая страница: 113
Последняя страница: 120
DOI: 10.4028/www.scientific.net/SSP.312.113
Аннотация: Here, we demonstrate formation of spherical-shaped amorphous titania (TiO2) nanoparticles decorated with Au nanoclusters via nanosecond pulse ablation (7-ns, 532-nm wavelength) of commercially available TiO2 nanopowders dispersed in an aqueous solution of chloroauric acid (HAuCl4). Generation of such hybrid nanostructures was found to be caused by laser induced remelting of the initial TiO2 nanoparticles, stimulated by Au nanoclusters that can adsorbed on their surface and boost light-to-heat conversion process in optically transparent titania. The morphology and chemical composition of the obtained hybrid nanomaterials were studied in detailvia scanning electron microscopy, Raman spectroscopy and Energy Dispersive X-ray spectroscopy. The average size and number of Au nanoclusters reduced on the TiO2 nanoparticle surface was shown to be tuned by varying the initial nanoparticles/HAuCl4 concentration ratio. Spectroscopic measurements of single hybrid nanoparticles scattering, as well as the corresponding numerical calculations of electromagnetic fields structure near their surface indicate synthesized functional nanomaterials as extremely promising for numerous applications of modern optics, optoelectronics and nanophotonics, e.g., realization of advanced chemo- and biosensing platforms, as well as of newgeneration solar cells.
Добавил в систему: Кулинич Сергей Алексеевич

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Au nanoparticle-decorated TiO2 nanospheres produced by laser reshaping in waterстатья

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