Kyoto University

Hitachi Chemical Company, Ltd.

Fukuda Metal Foil & Powder Co., Ltd.

Eitaro Yasuda

Osamu Kajita

Mitsuo Kawasaki

Takafumi Iwamoto

Kazuyuki Hirao

Kiyotaka Miura

Yasuhiko Shimotsuma

Shigeyuki Kimura

Ayu Onishi

Sachiko Masuoka

There is provided a method for efficiently manufacturing metal nano particles without condensing laser beams by using a lens etc. In this method, first, metallic foil pieces, which are a starting material, are dispersed in a dispersion liquid. Next, laser beams are irradiated directly to the metallic foil pieces without providing a condensing means, by which many metal fine particles are yielded. The particle diameters of the metal fine particles obtained can be controlled to sizes from nano particles to submicron particles by utilizing the relationship between the shape (especially thickness) of the metallic foil piece which is a starting material and the absorbed energy of the laser beam.

Metal fine particles and manufacturing method therefor

The present invention provides a nanowire production method that is simpler than conventional nanowire production methods, and that makes it easier to control the size and shape of the nanowires by using a technique completely different from the conventional ones. A powder particle containing a metal element is divided into nanometer-size wires containing the metal element by irradiating a suspension of the powder particles with a femtosecond laser. The present invention also makes it possible to divide the nanometer-size wires thus formed into nanometer-size particles containing the metal element by irradiating further the nanometer-size wires with the femtosecond laser.

Method for producing nanometer-size wires and nanometer-size wire

Growing community of inventors

Kyoto, Japan

Eitaro Yasuda