Metal nanoparticles enclosed

The structures of unsymmetrical photochromic 42, which is also intended for the use in the synthesis of metal nanoparticles enclosed by dihetarylethenes (07CC1355), and fluorescent 43, which was prepared in 05JOC5545, are illustrated. 

In addition to the edge plane/basal plane controversy, many nanocarbons also contain residual metal nanoparticles. Eigure 9.23 displays an Ee nanoparticle enclosed inside an MWCNT. 

The syntheses of materials with tailored properties have been proposed to improve the performance of the fuel cells [12, 34,35] by increasing the dispersion of the metal, decreasing the formation of agglomerates of catalyst nanoparticles, and raising the diffusion of species from/to the electroactive area. Several synthesis routes produce a carbon with tailored porous structure and composition by controlling the properties of the carbon precursor. The fabrication method to obtain a porous material, in general, can be enclosed in three steps ... 

When semicoductors are prepared for use as photocatalysts, it is very important that the particle size be in the range of a few nanometers, as in this case the sample has a large specific surface area and a high catalytic activity [1, 2, 8]. In the course of preparation, particles obtained by hydrolysis have to be stabilized in order to prevent coagulation. Materials earlier used for stabilization were surfactants and microemulsions. For example, metal hydroxide nanoparticles may be synthesized in the aqueous medium enclosed in the droplets of microemulsions of the water/oil type the nanoparticles formed are protected from coagulation by the surfactant stabilizing the droplet, making possible the preparation of nanoparticles with diameters of 20-50 nm [14, 15, 16, 17]. 

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