title: Synthesis of pure colloidal silver nanoparticles with high electroconductivity for printed electronic circuits: the effect of amines on their formation in aqueous media.
abstract: This paper describes a practical and convenient method to prepare stable colloidal silver nanoparticles for use in printed electronic circuits. The method uses a dispersant and two kinds of reducing agents including 2-(dimethylamino) ethanol (DMAE), which play important roles in the reduction of silver ions in an aqueous medium. The effect of DMAE and dispersant, as well as the factors affecting particle size and morphology are investigated. In the formation of the silver nanoparticles, reduction occurs rapidly at room temperature and the silver particles can be separated easily from the mixture in a short time. In addition, organic solvents are not used. Pure, small and relatively uniform particles with a diameter less than 10 nm can be obtained that exhibit high electroconductivity. The silver nanoparticles are stable, and can be isolated as a dried powder that can be fully redispersed in deionized water. This method of producing colloidal silver nanoparticles will find practical use in electronics applications.
authors.affiliation: Faculty of Fiber & Textile Science and Technology, Shinshu University, 3-15-1 Tokida, Ueda, Nagano 386-8567, Japan. jnatsu@shinshu-u.ac.jp
authors.forename: Jun
authors.initials: J
authors.lastname: Natsuki
authors.forename: Takao
authors.initials: T
authors.lastname: Abe
mesh_terms: D000588:Amines / Q000138:chemical synthesis* / Q000737:chemistry; D003102:Colloids / Q000138:chemical synthesis / Q000737:chemistry / Q000302:isolation & purification; D004553:Electric Conductivity; D004581:Electronics; D053768:Metal Nanoparticles / Q000737:chemistry*; D012834:Silver / Q000737:chemistry*; D014867:Water / Q000737:chemistry
chemical_list: D000588:Amines; D003102:Colloids; D014867:Water; D012834:Silver