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2607265 
Journal Article 
Synthesis of metallic copper nanoparticles coated with polypyrrole 
Kobayashi, Y; Ishida, S; Ihara, K; Yasuda, Y; Morita, T; Yamada, S 
2009 
Yes 
Colloid and Polymer Science
ISSN: 0303-402X
EISSN: 1435-1536 
287 
7 
877-880 
WOS:000266910400017 
This paper describes a method for polypyrrole (PPy) coating of metallic Cu nanoparticles in aqueous solution in atmosphere. Colloid solution of Cu nanoparticles was prepared by reducing Cu ions with the use of hydrazine in an aqueous solution dissolving citric acid and cetyltrimethylammonium bromide as stabilizers. The PPy coating was performed by polymerizing pyrrole with the use of hydrogen peroxide as an initiator in an aqueous colloid solution of the Cu nanoparticles. Ultraviolet-visible extinction measurements, transmission electron microscopy observation, and X-ray diffraction measurements revealed that the metallic Cu nanoparticles with a size of 27.6 +/- 11.1 nm were coated with PPy. The obtained PPy-coated Cu particles were chemically stable even in atmosphere. 
Copper; Nanoparticle; Coating; Polypyrrole