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Hydrothermal synthesis of monodispersed octahedral gold ..

of monodispersed Pd nanoparticles could be controlled from 17 to 30 Å in a one-step reaction by changing the amt.

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Hydrothermal synthesis of monodispersed octahedral ..

N2 - We have synthesized a variety of novel gold and palladium nanostructures by using simple aqueous solution growth approaches. In this conference, I will describe our recent work on the seed-mediated synthesis of palladium nanorods and branched nanocrystals. Hydrothermal synthesis of monodispersed octahedral gold nanocrystals and their self-assembled structures will be presented. The optical, SERS, and catalytic properties of these nanostructures will also be discussed.

Hydrothermal synthesis of monodispersed octahedral gold nanocrystals and their self ..

AB - We have synthesized a variety of novel gold and palladium nanostructures by using simple aqueous solution growth approaches. In this conference, I will describe our recent work on the seed-mediated synthesis of palladium nanorods and branched nanocrystals. Hydrothermal synthesis of monodispersed octahedral gold nanocrystals and their self-assembled structures will be presented. The optical, SERS, and catalytic properties of these nanostructures will also be discussed.

Controlled synthesis of highly monodispersed gold nanoparticles ..

Synthesis of monodispersed gold nanoparticles ..

In contrast, the product of a kinetically controlled synthesis often deviates from the thermodynamically favored structure, with notable examples including nanocrystals enclosed by high-index facets or concave surfaces.

We have synthesized a variety of novel gold and palladium nanostructures by using simple aqueous solution growth approaches. In this conference, I will describe our recent work on the seed-mediated synthesis of palladium nanorods and branched nanocrystals. Hydrothermal synthesis of monodispersed octahedral gold nanocrystals and their self-assembled structures will be presented. The optical, SERS, and catalytic properties of these nanostructures will also be discussed.

18/12/2017 · Hydrothermal synthesis ..

Blue shift in ultraviolet absorption spectra of monodisperse CeO 2−x nanoparticles ..

Octahedral gold nanocrystals with approximate average sizes of 30, 60, 90, 120, and 150 nm have been prepared by hydrothermal synthesis approach. Three types of self-assembled structures with faces, edges, or corners of the octahedra contacting the substrates have been identified. Particle size can affect the type of packing structure they adopt.

Here we report the hydrothermal synthesis of octahedral gold nanocrystals from an aqueous solution of HAuCl4, trisodium citrate, and cetyltrimethylammonium bromide (CTAB) surfactant. By heating the mixture at 110 °C for 6, 12, 24, 48, and 72 h, gold octahedra with approximate average sizes of 30, 60, 90, 120, and 150 nm can be obtained. The percent yield of octahedral nanocrystals is more than 90% for all the samples. Products formed at shorter reaction times were also examined. Structural characterization confirmed that the octahedra are bounded by entirely faces. As particle size increases, the surface plasmon resonance (SPR) absorption band red-shifts from 543 to 635 nm. These monodisperse gold octahedra can spontaneously self-assemble into long-range ordered packing structures upon water evaporation. Three types of self-assembled structures with faces, edges, or corners of the octahedra contacting the substrates have been identified. Particle size can affect the type of packing structure they adopt. The detailed packing arrangements are described. Significant red-shifted SPR coupling absorption bands in the near-infrared region are observed as a result of the formation of these assembled structures. These gold octahedra have been shown to serve as effective surface-enhanced Raman scattering substrates using thiophenol as the test molecule.

Hydrothermal Synthesis of Monodispersed Octahedral Gold Nanocrystals with Five Different Size Ranges and Their Self-Assembled Structures: Synthesis, ..
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  • Aqueous solution syntheses of palladium ..

    11/07/2010 · Facile synthesis and electrochemical properties of octahedral gold ..

  • Size-Controllable Synthesis of Monodispersed SnO2 ..

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  • 8774-8778 Size-Controllable Synthesis of ..

    08/01/2010 · We have synthesized a variety of novel gold and ..

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pot synthesis of gold hollow ..

Octahedral gold nanocrystals with approximate average sizes of 30, 60, 90, 120, and 150 nm have been prepared by hydrothermal synthesis approach. Three types of self-assembled structures with faces, edges, or corners of the octahedra contacting the substrates have been identified. Particle size can affect the type of packing structure they adopt.

2010 3rd International Nanoelectronics Conference (INEC)

Here we report the hydrothermal synthesis of octahedral gold nanocrystals from an aqueous solution of HAuCl4, trisodium citrate, and cetyltrimethylammonium bromide (CTAB) surfactant. By heating the mixture at 110 °C for 6, 12, 24, 48, and 72 h, gold octahedra with approximate average sizes of 30, 60, 90, 120, and 150 nm can be obtained. The percent yield of octahedral nanocrystals is more than 90% for all the samples. Products formed at shorter reaction times were also examined. Structural characterization confirmed that the octahedra are bounded by entirely faces. As particle size increases, the surface plasmon resonance (SPR) absorption band red-shifts from 543 to 635 nm. These monodisperse gold octahedra can spontaneously self-assemble into long-range ordered packing structures upon water evaporation. Three types of self-assembled structures with faces, edges, or corners of the octahedra contacting the substrates have been identified. Particle size can affect the type of packing structure they adopt. The detailed packing arrangements are described. Significant red-shifted SPR coupling absorption bands in the near-infrared region are observed as a result of the formation of these assembled structures. These gold octahedra have been shown to serve as effective surface-enhanced Raman scattering substrates using thiophenol as the test molecule.

2010 3rd International Nanoelectronics Conference ..

Once the monodispersed Pd nanoparticles were obtained, the larger particles with a narrow size distribution could be easily synthesized by using the stepwise growth reaction.

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