Abstract: Provided is a method for producing silver nanowires, the method capable of easily producing thin silver nanowires. The method including a step of adding a raw material solution (A) including silver ions and a solvent (a) to a raw material solution and (B) including halide ions and a solvent (b), the halide ions including substantially no chloride ions, and 97.0 mol % or more of the halide ions being bromide ions, so as to include a period where a value of (a rate of addition of the raw material solution (A) in terms of a rate of addition of silver ions [mol/min])/(an amount of halide ions in the raw material solution (B) [mol])×100 is 6.0 [min?1] or less, thereby forming silver nanowires in an obtained mixed solution substantially containing no chloride ions.

Abstract: In order to provide a method for producing silver nanowires in which a local maximum of optical absorption in the plasmon absorption band can be shifted toward the short wavelength side without making the wire diameter smaller, a method for producing silver nanowires includes a step of heating a mixed liquid of a dispersion of silver nanowires and metal ions of a transition metal that is different from silver, and reducing the metal ions, thereby intermittently precipitating clumps of the transition metal on a surface of the silver nanowires. The thus produced silver nanowires have metal clumps intermittently along the length direction, and a local maximum of optical absorption in the plasmon absorption band of the silver nanowires has been shifted toward the short wavelength side.

Abstract: In order to provide a method for producing silver nanowires in which a local maximum of optical absorption in the plasmon absorption band can be shifted toward the short wavelength side without making the wire diameter smaller, a method for producing silver nanowires includes a step of heating a mixed liquid of a dispersion of silver nanowires and metal ions of a transition metal that is different from silver, and reducing the metal ions, thereby intermittently precipitating clumps of the transition metal on a surface of the silver nanowires. The thus produced silver nanowires have metal clumps intermittently along the length direction, and a local maximum of optical absorption in the plasmon absorption band of the silver nanowires has been shifted toward the short wavelength side.

Abstract: A method for producing nickel nanoparticles is described, including a first step of heating a mixture of a nickel carboxylate with 1-12 carbon atoms in its moiety excluding —COOH and a primary amine to obtain a complexed reaction solution with a nickel complex foiiiied therein, and a second step of heating the complexed reaction solution by a microwave to obtain a Ni-nanoparticle slurry. In the first step, the heating is preferably conducted at a temperature of 105-175° C. for 15 minutes or longer. In the second step, the heating is preferably conducted at a temperature of 180° C. or higher.

Abstract: A method for producing nickel nanoparticles is described, including a first step of heating a mixture of a nickel carboxylate with 1-12 carbon atoms in its moiety excluding —COOH and a primary amine to obtain a complexed reaction solution with a nickel complex foiiiied therein, and a second step of heating the complexed reaction solution by a microwave to obtain a Ni-nanoparticle slurry. In the first step, the heating is preferably conducted at a temperature of 105-175° C. for 15 minutes or longer. In the second step, the heating is preferably conducted at a temperature of 180° C. or higher.