Ehime University

Kabushiki Kaisya Toyota Jidosyokki

Shinobu Mukasa

Shinfuku Nomura

Hiromichi Toyota

Yoshiaki Hattori

A nanometer-size-particle production apparatus and method are provided which can prevent the occurrence of waste fluids, and which makes quick and continuous syntheses feasible while suppressing damages to the electrode. The nanometer-size-particle production apparatus is for synthesizing nanometer size particles in a liquid by means of plasma in the liquid.

Nanometer-size-particle production apparatus, nanometer-size-particle production process, nanometer-size particles, zinc/zinc oxide nanometer-size particles, and magnesium hydroxide nanometer-size particles

A nanometer-size-particle production apparatus is provided which can prevent the occurrence of waste fluids, and which makes quick and continuous syntheses feasible while suppressing damages to the electrode. The present invention is a nanometer-size-particle production apparatus for synthesizing nanometer-size particles in a liquid by means of plasma in liquid, and comprises: a container for accommodating the liquid therein; an electromagnetic-wave generation device for generating a high-frequency wave, or a microwave; an electrode conductor whose leading end makes contact with the liquid to supply the high-frequency wave or the microwave to the liquid; a covering portion being disposed into the liquid so as to cover a leading-end upside of the electrode conductor; a metallic chip being composed of a metal making a raw material of nanometer-size particles, and having a leading end that is disposed to face to a leading-end section of the electrode conductor; and a feed device for feeding out the leading end of the metallic chip with respect to the leading-end section of the electrode conductor; the leading end of the electrode conductor having a configuration that is a non-edge configuration; and the electrode conductor, except for the leading end, having an axially-orthogonal cross-sectional area that is larger than an axially-orthogonal cross-sectional area of the metallic chip.

This invention is to provide a method for the production of diamond at a high rate and in a high efficiency using in-liquid plasma. The present invention is a method for the production of diamond using electromagnetic waves irradiated to a liquid containing carbon, hydrogen and oxygen in which the ratio of hydrogen atoms to the sum of carbon atoms and hydrogen atoms is from 0.75 to 0.82 and the ratio of carbon atoms to the sum of carbon atoms and oxygen atoms is from 0.47 to 0.58 so as to generate plasma in the liquid.

Growing community of inventors

Matsuyama, Japan

Shinobu Mukasa