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This technology will support nanoparticle-based recording media.

T1 - Synthesis of polystyrene-silica composite particles via one-step nanoparticle-stabilized emulsion polymerization

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NYACOL | Nanoparticle Synthesis At Its Finest

Further increasing the initiator/monomer ratio to 4.2 wt% does not continually decrease the particle size, which may be limited by the stabilization provided by a fixed concentration of silica nanoparticles.

Bio-controlled synthesis of nanoparticles with optical and magnetic properties1045

A single grapheme nano-sheet (0.35 nm thick) separates arrays of silver nanoparticle "dimers" and provides orders of magnitude enhancement in photon detection sensitivity./i>

Silicon Oxide Nanopowder / SiO2 Nanoparticles (SiOx, …

NIST experiments with varying concentrations of nanoparticle additives indicate a major opportunity to improve the energy efficiency of large industrial, commercial, and institutional cooling systems known as chillers.

N2 - The effects of precursor structure and polycondensation conditions on the properties of hybrid nanoparticles synthesized from organo-trimethoxysilanes were studied. Hybrid nanoparticles containing groups capable of forming hydrogen bonds were synthesized from functional derivatives of 3-aminopropyltrimethoxysilane. For the synthesis of phenylurea-functionalized organosilica nanoparticles different approaches to nanoparticle preparation were used. It was shown that the nature of the functional groups (proton-donor or proton-acceptor) affects the aggregation of silica nanoparticles. Also, the difference in behavior of nanoparticles prepared using surface modification and polycondensation was demonstrated for different pH, ionic strength and solvent polarity. As a result, by changing the pH of the solutions, it is possible to shift the aggregation pattern of these nanoparticles, such as the size of the initially formed aggregates.

Green Synthesis of Metallic Nanoparticles via ..

Another type of silica nanoparticle is riddled with nanoscale pores. Researchers are developing drug delivery methods where therapeutic molecules stored inside the pores are slowly released in a diseased region of the body, such as near a cancer tumor.

AB - The effects of precursor structure and polycondensation conditions on the properties of hybrid nanoparticles synthesized from organo-trimethoxysilanes were studied. Hybrid nanoparticles containing groups capable of forming hydrogen bonds were synthesized from functional derivatives of 3-aminopropyltrimethoxysilane. For the synthesis of phenylurea-functionalized organosilica nanoparticles different approaches to nanoparticle preparation were used. It was shown that the nature of the functional groups (proton-donor or proton-acceptor) affects the aggregation of silica nanoparticles. Also, the difference in behavior of nanoparticles prepared using surface modification and polycondensation was demonstrated for different pH, ionic strength and solvent polarity. As a result, by changing the pH of the solutions, it is possible to shift the aggregation pattern of these nanoparticles, such as the size of the initially formed aggregates.

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  • 20/03/2009 · Synthesis of silica nanoparticles by ..

    Silicon Oxide Nanopowder / SiO2 Nanoparticles (SiOx, 99.5+%, 15-20nm, P-type, Porous and amorphous)

  • Role of ammonia in silica nanoparticle synthesis?

    This review is concerned with the synthesis of metallic nanoparticles using plant extracts

  • Silica Nanoparticle Synthesis - YouTube

    22/03/2012 · Mesoporous Silica Nanoparticles: Synthesis, ..

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silica nanoparticle biodistributions ..

You can also functionalize silica nanoparticles by bonding molecules to a nanoparticle that also is able to bond to another surface, such as a cotton fiber. The functionalized silica nanoparticles attach to the cotton fiber and form a rough surface that is hydrophobic (water repellent), giving an effect similar to the water repellency of lotus leaves.

Silica | Nanoparticle | Silicon Dioxide

N2 - Polystyrene-silica core-shell composite particles are prepared by one-step emulsion polymerization with a nonionic initiator VA-086, solely stabilized by silica nanoparticles. The silica nanoparticles are successfully incorporated as the shell, likely due to the fact that the nanoparticles are thermodynamically favorable to adsorb and remain at the liquid-liquid interfaces during the emulsion polymerization. The silica content, determined by thermogravimetric analysis, is approximately 20 wt% in the composite particles. In addition, we further explore the polymerization mechanism by studying the particle growth as a function of initiator concentration and reaction time: when the initiator/monomer ratio is increased from 0.83 to 2.5 wt%, the particle size at 24 h reaction time decreases for a fixed monomer amount, possibly due to a larger number of nuclei at the initial stage of polymerization. Further increasing the initiator/monomer ratio to 4.2 wt% does not continually decrease the particle size, which may be limited by the stabilization provided by a fixed concentration of silica nanoparticles. The surface coverage also changes with initiator concentration and reaction time although the underlying mechanism is not fully understood.

Synthesis of mesoporous silica ..

Use the search box above for quick searches, browse our featured nanoparticles displayed graphically below or select the top Search tab for our advanced search options.

Synthesis of Mesoporous Silica Nanoparticles - …

AB - Polystyrene-silica core-shell composite particles are prepared by one-step emulsion polymerization with a nonionic initiator VA-086, solely stabilized by silica nanoparticles. The silica nanoparticles are successfully incorporated as the shell, likely due to the fact that the nanoparticles are thermodynamically favorable to adsorb and remain at the liquid-liquid interfaces during the emulsion polymerization. The silica content, determined by thermogravimetric analysis, is approximately 20 wt% in the composite particles. In addition, we further explore the polymerization mechanism by studying the particle growth as a function of initiator concentration and reaction time: when the initiator/monomer ratio is increased from 0.83 to 2.5 wt%, the particle size at 24 h reaction time decreases for a fixed monomer amount, possibly due to a larger number of nuclei at the initial stage of polymerization. Further increasing the initiator/monomer ratio to 4.2 wt% does not continually decrease the particle size, which may be limited by the stabilization provided by a fixed concentration of silica nanoparticles. The surface coverage also changes with initiator concentration and reaction time although the underlying mechanism is not fully understood.

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