Journal ArticleDOI
Size Control of Palladium Nanoparticles and Their Crystal Structures
Toshiharu Teranishi,Mikio Miyake +1 more
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TLDR
The mean diameter of monodispersed Pd nanoparticles could be controlled from 17 to 30 A in a one-step reaction by changing the amount of protective polymer, poly(N-vinyl-2-pyrrolidone) (PVP) and the kind and/or the concentration of alcohol in the solvent as discussed by the authors.Abstract:
The mean diameter of monodispersed Pd nanoparticles could be controlled from 17 to 30 A in a one-step reaction by changing the amount of protective polymer, poly(N-vinyl-2-pyrrolidone) (PVP) and the kind and/or the concentration of alcohol in the solvent. Although increasing the amount of protective polymer made the size of Pd nanoparticles smaller, the particle size appeared to have a lower limit determined by the kind of alcohol. On the other hand, monodispersed Pd nanoparticles of smaller diameter were obtained in the order methanol > ethanol > 1-propanol, indicating that a faster reduction rate of [PdCl4]2- ions is an important factor to produce the smaller particles. The particle diameter showed a minimum at around 40 vol % of alcohol in solvent. 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. The Pd nanoparticles obtained here had fcc structures like that of bulk Pd, althoug...read more
Citations
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Chemistry and properties of nanocrystals of different shapes.
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Synthesis of monodisperse spherical nanocrystals.
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References
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Light-emitting diodes made from cadmium selenide nanocrystals and a semiconducting polymer
TL;DR: In this article, a hybrid organic/inorganic electroluminescent device was constructed based on the recombination of holes injected into a layer of semiconducting p-paraphenylene vinylene (PPV) with electrons injected into the multilayer film of cadmium selenide nanocrystals.
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Journal ArticleDOI
Electronic Shell Structure and Abundances of Sodium Clusters
Walter D. Knight,Keith Clemenger,Walt A. de Heer,Winston A. Saunders,Mei-Yin Chou,Marvin L. Cohen +5 more
TL;DR: In this paper, a mass spectra for sodium clusters of $N$ atoms per cluster, produced in a supersonic expansion with argon carrier gas, is presented. The spectra show large peaks or steps at $N=8, 20, 40, 58, \mathrm{and} 92$.
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Physicochemical properties of small metal particles in solution: "microelectrode" reactions, chemisorption, composite metal particles, and the atom-to-metal transition
TL;DR: In this paper, the effects of surface modification on colloidal metal particles in aqueous solution were investigated. And the resulting changes in the chemical, photochemical, and optical properties were discussed.
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Chemical catalysis by colloids and clusters
TL;DR: In this article, a review of catalysis by metal clusters and colloids is presented, covering the period from 1980 to mid-1992, with a focus on the use of the terms colloid and cluster.