Abstract
Au/TiO2 core-shell structure nanoparticles were synthesized by sol-gel process, and the morphology and crystallinity of TiO2 shell were investigated by TEM and UV-vis absorption spectrometer. Au/TiO2 core-shell structure nanoparticles could be prepared by the hydrolysis of TOAA (titanium oxide acethylacetonate) in gold sol ethanol solution with water. The thickness of TiO2 shell on the surface of gold particles was about 1 nm. To investigate the crystallinity of TiO, shell, UV light with 254 nm and radioactive ray of60Co were irradiated on the TiO2-coated gold sol ethanol solution. The surface plasmon band of gold nanoparticles appeared only when the radioactive ray was irradiated on the TiO2-coated gold sol ethanol solution. From these results, it was found that the TiO, shell was amorphous and the MUA (mercaptoundecanoic acid) layer on the Au particle for its dispersion in ethanol did not act as an obstacle to disturb the movement of electrons onto the surface of Au particles.
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Aliev, F. G., Correa-Duarte, M. A., Mamedov, A., Ostrander, J. W., Giersig, M., Liz-Marzan, L. M. and Kotov, N. A., “Layer-by-layer Assembly of Core-shell Magnetite Nanoparticles: Effect of Silica Coating on Interparticle Interactions and Magnetic Properties,”Advanced materials,11,1006 (1999).
Bedja, L, Surat Hotchandani, S. and Kamat, P. V, “Photoelectrochemistry of Quantized Tungsten Trioxide Colloids: Electron Storage, Electrochromic, and Photoelectrocbxomic Effects,”J. Phys. Chem.,97, 11064(1993).
Chang, S., Liu, L. and Asher, S. A, “Preparation and Properties of Tailored Morphology, Monodisperse Colloidal Silica-cadmium Sulfide Nanocomposites,”J. Am. Chem. Soc,116, 6739 (1994).
Dabbousi, B. O. M., Bawendi, G., Onitsuka, O. and Rubner, M. E, “Electroluminescence from CdSe Quantum-dot/Polymer Composites,”Appl. Phys. Lett.,66, 1316 (1995).
Giersig, M. and Mulvaney, P., “Preparation of Ordered Colloid Monolayers by Electrophoretic Deposition,”Langmuir,9, 3408 (1993).
Hayes, D., Micic, O. I., Nenadovic, M. T, Swayambunathan, V. and Meisel, D., “Radiolytic Production and Properties of Ultrasmall Cadmium Sulfide Particles,”J. Phys. Chem.,93, 4603 (1989).
Jakob, M. and Levanon, H., “Charge Distribution UV-irradiated TiO, and Gold Nanoparitces: Determination of Shift in the Fermi Level,”Nano left.,3, 353 (2003).
Kamat, P. V., Flumiani, M. and Hartland, G. V., “Picosecond Dynamics of Silver Nanoclusters. Photoejection of Electrons and Fragmentation,”J. Phys. Chem. B,102, 3123 (1998).
Kane, V. and Mulvaney, P., “Double-Layer Interactions between Self-Assembled Monolayers of Mercaptoundecanoic Acid on Gold Surfaces,”Langmuir,14, 3303 (1998).
Link, S., Burda, C., Nikoobakht, B. and El-Sayed, M. A., “Laser-Induced Shape Changes of Colloidal Gold Nanorods Using Femtosecond and Nanosecond Laser Pulses,”J. Phys. Chem. B,104, 6152 (2000).
Micheletto, R, Fukuda, H. and Ohtsu, M., “A Simple Method for the Production of a Two-Dimensional, Ordered Array of Small Latex Particles,”Langmuir,11, 3333 (1995).
Mock, J. J., Barbic, M., Smith, D. R., Schultz, D. A. and Schultz, S., “Shape Effects in Plasmon Resonance of Individual Colloidal Silver Nanoparticles,”J. Chem. Phys.,116, 6755 (2002).
Motte, L., Billoudet, F. and Pileni, M. P., “Self-Assembled Monolayer of Nanosized Particles Differing by Their Sizes,”J. Phys. Chem.,99,16425 (1995).
Mulvaney, P., “Surface Plasmon Spectroscopy of Nanosized Metal Particles,”Langmuir,12, 788 (1996).
Mulvaney, P., Liz-Marzan, L. M., Glersig, M. and Ung, T., “Silica Encapsulation of Quantum Dots and Metal Clusters,”J. Mater. Chem.,10, 1259 (2000).
Nasr, C., Hotchandani, S, Kim, W. Y., Schmehl, R. H. and Kamat, P. V., “Photoelectrochemistry of Composite Semiconductor Thin Films: Photosensitization of SnO2/CdS Coupled Nanocrystallites with a Ruthenium Polypyridyl Complex,”J. Phys. Chem. B,101, 480 (1997).
Neeves, A. E. and Birnboim, M. H., “Composite Structures for the Enhancement of Nonlinear-optical Susceptibility,”J. Opt. Soc. Am. B,6 787 (1989).
Philip, R., Kumar, G. R, Sandhyarani, N. and Pradeep, T, “Picosecond Optical Nonlinearity in Monolayer-protected Gold, Silver, and Goldsilver Alloy Nanoclusters,”Phys. Rev. B,62,13160 (2000).
Sun, Y., Riggs, J. E., Rollins, H. W. and Guduru, R., “Strong Optical Limiting of Silver-Containing Nanocrystalline Particles in Stable Suspensions,”J. Phys. Chem. B, 103,77 (1999).
Turkevich, I, Stevenson, P. C. and Hillier, J., “The Formation of Colloidal Gold,”Anal. Chem.,21,475 (1949)
Ueno, A, Kakuta, N., Park, K. H., Finlayson, M. F, Bard, A. I, Campion, A. M., Fox, A., Webber, S. E. and White, J. M., “Silica-supported ZnS/CdS Mixed Semiconductor Catalysts for Photogeneration of Hydrogen,”J. Phys. Chem. B,89, 3828 (1985).
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Yu, Yt., Mulvaney, P. Synthesis and characterization of Au/TiO2 core-shell structure nanoparticles. Korean J. Chem. Eng. 20, 1176–1182 (2003). https://doi.org/10.1007/BF02706958
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DOI: https://doi.org/10.1007/BF02706958