Synthesis of TiO{sub 2} nanoparticles decorated with gold nanoclusters using pulsed laser ablation in liquid

Journal Article · Tue Sep 01 00:00:00 EDT 2020 · Quantum Electronics (Woodbury, N.Y.)

DOI:https://doi.org/10.1070/QEL17318· OSTI ID:23142002

Gurbatov, S. O.; Kuchmizhak, A. A. ^[1]; Mintcheva, N. ^[2]; Iwamori, S. ^[3]

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1. Institute of Automation and Control Processes, Far Eastern Branch, Russian Academy of Sciences, ul. Radio 5, 690041 Vladivostok (Russian Federation)
2. Department of Chemistry, University of Mining and Geology, Sofia 1700 (Bulgaria)
3. Research Institute of Science and Technology, Tokai University, Hiratsuka, Kanagawa 259-1292 (Japan)

Amorphous spherical titanium dioxide (TiO{sub 2}) nanoparticles, decorated gold nanoparticles, are shown to be formed under irradiation of commercial TiO{sub 2} nanopowders dispersed in aqueous solution of hydrogen tetrachloroaurate (HAuCl{sub 4}) by second-harmonic nanosecond pulses of an Nd : YAG laser. It is found that these hybrid nanostructures are formed during laser-induced remelting of the initial nanoparticles, stimulated by gold nanoclusters (providing more efficient absorption of visible laser radiation by titanium dioxide) recovered on their surface. The morphology and chemical composition of the newly formed hybrid nanomaterials are investigated in detail by electron microscopy, Raman spectroscopy, and energy-dispersive analysis. It is shown that the average size and number of gold nanoparticles recovered on the TiO{sub 2} surface can be controlled by varying the concentration ratio of the initial nanomaterial and HAuCl{sub 4}. A spectroscopic analysis of light scattering by single hybrid nanoparticles and the results of numerical calculation of the structure of electromagnetic fields near their surface indicate good prospects of these hybrid nanomaterials for various applications in modern optics, optoelectronics, and nanophotonics; for example, for designing chemo- and biosensor platforms and new-generation solar cells. (nanoparticles)

• OSTI ID: 23142002
• Journal Information: Quantum Electronics (Woodbury, N.Y.), Vol. 50, Issue 9; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-7818
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
74 ATOMIC AND MOLECULAR PHYSICS
ABLATION
ABSORPTION
AQUEOUS SOLUTIONS
CONCENTRATION RATIO
ELECTRON MICROSCOPY
HYBRIDIZATION
HYDROGEN
LASER RADIATION
LIQUIDS
NANOPARTICLES
NANOSTRUCTURES
NEODYMIUM LASERS
PULSES
RAMAN SPECTROSCOPY
SOLAR CELLS
SURFACES
SYNTHESIS
TITANIUM OXIDES