Encyclopedia of Polymeric Nanomaterials

2015 Edition
| Editors: Shiro Kobayashi, Klaus Müllen

Metal Nanoparticles

  • Tetsu YonezawaEmail author
Reference work entry
DOI: https://doi.org/10.1007/978-3-642-29648-2_125


Colloids; Hyper-fine particles; Nanoclusters; Nanopowders


Nanoparticles are spherical-like particles with their diameter in the range of 1 and 100 nm. Metal nanoparticles are nanoparticles composed of metal elements, which are usually covered by organic molecules as a protective layer. Polymers, surfactants, and metal ligands can be used as protective molecules.


During the past few decades, research on metal nanoparticles, clusters, and colloids has been extensively pursued because of the specific properties that are controlled by the size of these materials [1, 2].

Figure 1 shows examples of the symmetrical structure of face-centered cubic (fcc) nanoparticles in several sizes. An M 13 nanoparticle has one atom in its core, which is surrounded by 12 shell atoms. An M 55nanoparticle has 13 atoms in its core which is surrounded by 42 shell atoms. These particles contain more surface atoms than atoms located in their cores. Therefore, these nanoparticles...
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  1. 1.
    Toshima N, Yonezawa T (1998) Bimetallic nanoparticles – novel materials for chemical and physical applications. New J Chem 22:1179–1201. doi:10.1039/A805753BGoogle Scholar
  2. 2.
    Roucoux A, Schulz J, Patin H (2002) Reduced transition metal colloids: a novel family of reusable catalysts? Chem Rev 102:3757. doi:10.1021/cr010350jGoogle Scholar
  3. 3.
    Peng X, Pan Q, Rempel GL (2008) Bimetallic dendrimer-encapsulated nanoparticles as catalysts: a review of the research advances. Chem Soc Rev 37:1619–1628. doi:10.1039/B716441FGoogle Scholar
  4. 4.
    Hirai H, Chawanya H, Toshima N (1985) Colloidal palladium protected with poly(N-vinyl-2-pyrrolidone) for selective hydrogenation of cyclopentadiene. React Polym 3:127Google Scholar
  5. 5.
    Hirai H, Toshima N (1986) Polymer-protected Colloidal Catalysts. In: Iwasawa Y (ed) Tailored metal catalysts. D. Reidel, Dortrecht, pp 121–140Google Scholar
  6. 6.
    Hirai H, Nakao Y, Toshima N (1978) Preparation of colloidal transition metals in polymers by reduction with alcohols or ethers. J Macromol Sci-Chem 13:727. doi:10.1080/00222337908056685Google Scholar
  7. 7.
    Yonezawa T, Toshima N (1993) Polymer- and micelle-protected gold/platinum bimetallic systems. Preparation, application to catalysis for visible-light-induced hydrogen evolution, and analysis of formation process with optical methods. J Mol Catal 83:167Google Scholar
  8. 8.
    Tsunoyama H, Sakurai H, Negishi Y, Tsukuda T (2005) Size-specific catalytic activity of polymer-stabilized gold nanoclusters for aerobic alcohol oxidation in water. J Am Chem Soc 127:9374. doi:10.1021/ja052161eGoogle Scholar
  9. 9.
    Toshima N, Yonezawa T, Kushihashi K, Hirai H (1989) Colloidal dispersions of palladium-platinum bimetallic clusters protected by polymers. Preparation and application to catalysis. Chem Lett 18:1769Google Scholar
  10. 10.
    Toshima N, Yonezawa T, Kushihashi K (1993) Polymer-protected palladium-platinum bimetallic clusters: preparation, catalytic properties and structural considerations. J Chem Soc Faraday Trans 89:2537–2543. doi:10.1039/FT9938902537Google Scholar
  11. 11.
    Toshima N, Harada M, Yonezawa T, Kushihashi K, Asakura K (1991) Structural analysis of polymer-protected palladium/platinum bimetallic clusters as dispersed catalysts by using extended x-ray absorption fine structure spectroscopy. J Phys Chem 95:7448. doi:10.1021/j100172a061Google Scholar
  12. 12.
    Tomonari M, Ida K, Yamashita H, Yonezawa T (2008) Size-controlled oxidation-resistant copper fine particles covered by biopolymer nanoskin. J Nanosci Nanotechnol 8:2468–2471Google Scholar
  13. 13.
    Yonezawa T, Hyono A, Nishida N (2010) Detailed investigation of the reduction process of cupric oxide (CuO) to form metallic copper fine particles with a unique diameter. J Mater Sci 45:6433. doi:10.1007/s10853-010-4728-5Google Scholar
  14. 14.
    Yonezawa T, Takeoka S, Kishi H, Ida K, Tomonari M (2008) The preparation of copper fine particle paste and its application as the inner electrode material of a multilayered ceramic capacitor. Nanotechnology 19:145706. doi:10.1088/0957-4484/18/14/145706Google Scholar
  15. 15.
    Yonezawa T, Nishida N, Hyono A (2010) One-pot preparation of antioxidized copper fine particles with a unique structure by chemical reduction at room temperature. Chem Lett 39:548–549. doi:10.1246/cl.2010.548Google Scholar
  16. 16.
    Kawasaki H, Kosaka Y, Myoujin Y, Narushima T, Yonezawa T, Arakawa R (2011) Microwave-assisted polyol synthesis of copper nanocrystals without using additional protective agents. Chem Commun 47:7740. doi:10.1039/c1cc12346gGoogle Scholar

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© Springer-Verlag Berlin Heidelberg 2015

Authors and Affiliations

  1. 1.Division of Materials Science and Engineering, Faculty of EngineeringHokkaido UniversitySapporoJapan