Osaka University

Nagoya University

Tokyo University of Science Educational Foundation Administrative Organization

Ken-ichi Okazaki

Tsukasa Torimoto

Susumu Kuwabata

Tatsuya Kameyama

Nobuo Tanaka

Yousuke Tomita

Takaaki Osaki

Akihiko Kudo

Toshimasa Suzuki

Copper(II) acetate, zinc(II) acetate, and tin(IV) acetate are weighed so that the total amount of metal ions is 2.0&#xd7;10mol and the molar ratio of ions is Cu:Zn:Sn=2:1:1, and 2.0 cmof oleylamine is added to prepare a mixed solution. Apart from this, 1.0 cmof oleylamine is added to 2.0&#xd7;10mol of sulfur powder to prepare a mixed solution. These mixed solutions are separately heated at 60&#xb0; C. and mixed at room temperature. The pressure in a test tube is reduced, followed by nitrogen filling. The test tube is heated at 240&#xb0; C. for 30 minutes and then allowed to stand until room temperature. The resultant product is separated into a supernatant and precipitates by centrifugal separation. The separated supernatant is filtered, methanol is added to produce precipitates. The precipitates are dissolved by adding chloroform to prepare a semiconductor nanoparticle solution.

Semiconductor nanoparticles and method for producing same

First, an ionic liquid is placed on a glass slide, which is then installed in an evaporation apparatus, and a metal (for example, indium) is mounted as a target material at a position facing the ionic liquid, followed by sputter deposition of the metal. After sputtering, the ionic liquid containing nanoparticles dispersed therein is recovered. The nanoparticles are solid nanoparticles. Next, the ionic liquid containing the solid nanoparticles dispersed therein is placed in a test tube and then oxidized by heating in air at 250&#xb0; C. for 1 hour. As a result, hollow nanoparticles having cavities formed in core portions of the solid nanoparticles are produced.

Method for producing hollow nanoparticle comprising deposition on/in an ionic liquid, hollow nanoparticle, and dispersion liquid thereof

The present invention provides a method for producing nanoparticles by attaching atoms or molecules constituting a nanoparticle precursor to an ionic liquid. According to this method, it is possible to produce nanoparticles that do not aggregate easily in a liquid without its surface modification. Furthermore, it is possible to produce nanoparticles without the need for a complicated operation or the formation of a by-product because of the direct production of the nanoparticles from the nanoparticle precursor.

Method for producing nanoparticles

Growing community of inventors

Nagoya, Japan

Ken-ichi Okazaki