Abstract
Many intensive studies on metal nanoparticles have been carried out from the point of view of a wide variety of scientific interests and pratical properties.1–8 These nanoparticles, with their diameters of 1–10 nm, consist of several tens or thouthands of metal atoms in every one. Recently, these nanoparticles can be considered as a new class of materials in a presently hot nanotechnology. Examples include some specific properties: spectroscopic and magnetic properties of semiconductor nanoparticles, synthesis and catalysis of polymer-stabilized or ligand-coated metal nanoparticles, as well as nonlinear optical properties of metal nanoparticle-doped metal oxides. Thanks to the size limit of nanoparticles, they are expected to show novel properties that can be explained by the “nanoscopic effect,” “nanosize effect,” or “quantum size effect.” This effect has been theoretically established by Kubo.9 This size limit introduces quite a high population of surface atoms rather than inner atoms. Therefore, the properties of nanoparticles are controlled by the corresponding surface atoms. Various preparative methods have been proposed to obtain perfectly uniform-size metal nanoparticles. Perfectly monodispersed metal nanoparticles are, of course, ideal, but special properties of nanoparticles are to be expected even if this ideal condition is not exactly realized. The synthesis of monodispersed nanoparticles is of key importance because their properties varied strongly based on their dimensions. Economical mass production of monodispersed metal nanoparticles is now becoming one of the very important issues for realizing these products as real materials.10
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Yonezawa, T. (2006). Synthesis and Characterization of Core-Shell Structured Metals. In: Adachi, M., Lockwood, D.J. (eds) Self-Organized Nanoscale Materials. Nanostructure Science and Technology. Springer, New York, NY. https://doi.org/10.1007/0-387-27976-8_7
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DOI: https://doi.org/10.1007/0-387-27976-8_7
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