Fine-Tuning Size of Gold Nanoparticles by Cooling during Reverse Micelle Synthesis

Smetana, Alexander B.; Wang, Joanna Shaofen; Boeckl, John; Brown, Gail J.; Wai, Chien M.

doi:10.1021/la701229q

Cited by 56 publications

(42 citation statements)

References 27 publications

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“…[15] For some systems, the capping material will also limit the size of the particle, as in micelle or reverse micelle directed reactions. [34,35] In the case of citrate and similar reducing agents, the concentration of the reducing agent is the determining factor. [30] The concentration of the initial "seed" clusters will be entirely determined by the amount of reducing agent present, which in turn determines the total number of resulting particles.…”

Section: Synthesismentioning

confidence: 99%

Plasmonic Optical Properties and Applications of Metal Nanostructures

2008

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In this review article, we provide an overview of recent research activities in the study of plasmonic optical properties of metal nanostructures with emphasis on understanding the relation between surface plasmon absorption and structure. Both experimental results and theoretical calculations have indicated that the plasmonic absorption strongly depends on the detailed structure of the nanomaterials. Examples discussed include spherical nanoparticles, nanorods, nanowires, hollow nanospheres, aggregates, and nanocages. Plasmon-phonon coupling measured from dynamic studies as a function of particle size, shape, and aggregation state is also reviewed. The fascinating optical properties of metal nanostructures find important applications in a number of technological areas including surface plasmon resonance, surface-enhanced Raman scattering, and photothermal imaging and therapy. Their novel optical properties and emerging applications are illustrated using specific examples from recent literature. The case of hollow nanosphere structures is highlighted to illustrate their unique features and advantages for some of these applications.

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Section: Synthesismentioning

confidence: 99%

Plasmonic Optical Properties and Applications of Metal Nanostructures

2008

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“…Among a number of the methods of their preparation, rather widespread one is chemical reduction of gold species in solutions including homogeneous [6,7], heterogeneous [8][9][10], and colloidal [11,12] systems. Synthesis in reverse micelles is one of the efficient methods of obtaining nanoparticles with a narrow size distribution due to the possibility of purposeful adjustment of micelle structure through dosed solubilization of the disperse aqueous phase (DAP) [12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Di-(2-ethylhexyl) dithiophosphoric acid surface protected gold nanoparticles: micellar synthesis, stabilization, isolation, and properties

et al. 2011

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Gold nanoparticles (AuNPs) were synthesized in the organic solution by means of the reduction of HAuCl 4 by hydrazine in reverse micelles of oxyethylated surfactant Triton N-42, with decane as the dispersion medium. To isolate the powder of particles, the micelles were destroyed with chloroform in the presence of di-(2-ethylhexyl) dithiophosphoric acid as a surface protecting agent. According to the results of several experiments, the yield is within the limits of 90-98%, calculated for gold. The obtained preparations are dark blue hydrophobic powders containing aggregated but not agglomerated gold nanoparticles, as well as microcrystals (∼0.08-0.2 μm) of NaCl. The powders get re-dispersed in weakly polar organic solvents with the formation of colloidal solutions. The shape of the nanoparticles is spherical. Their nuclei are gold single crystals with a narrow size distribution; their diameter (d Au ) is about two times as large as the diameter of the aqueous nucleus (d c ) of initial micelles: d Au =7.7±

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“…Multiple sets of the particle samples were combined, re-suspended in 1 mL of toluene or hexane, and the final concentration was approximately 0.005 M. All procedures were conducted on the bench-top without the need for inert environments. Detailed procedure can be found in the literature (Smetana et al 2007). …”

Section: Au Nanoparticlesmentioning

confidence: 99%

Nanoparticle film deposition using a simple and fast centrifuge sedimentation method

et al. 2014

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Colloidal nanoparticles (NPs) can be deposited uniformly on flat or rough and uneven substrate surfaces employing a standard centrifuge and common solvents. This method is suitable for depositing different types of nanoparticles on a variety of substrates including glass, silicon wafer, aluminum foil, copper sheet, polymer film, plastic, and paper, etc. The thickness of the films can be controlled by the amount of the colloidal nanoparticle solution used in the preparation. The method offers a fast and simple procedure compared to other currently known nanoparticle deposition techniques for studying the optical properties of nanoparticle films.

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Fine-Tuning Size of Gold Nanoparticles by Cooling during Reverse Micelle Synthesis

Cited by 56 publications

References 27 publications

Plasmonic Optical Properties and Applications of Metal Nanostructures

Plasmonic Optical Properties and Applications of Metal Nanostructures

Di-(2-ethylhexyl) dithiophosphoric acid surface protected gold nanoparticles: micellar synthesis, stabilization, isolation, and properties

Nanoparticle film deposition using a simple and fast centrifuge sedimentation method

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