Method for producing fullerene suspension

• US 20080217445A1
• Filed: 02/07/2008
• Published: 09/11/2008
• Est. Priority Date: 08/10/2005
• Status: Active Grant

• Current Assignee: Absize, Inc.
• Original Assignee: Absize, Inc.
• Inventors: Ryo, Sen-ichi, Oh, Isamu, Masuhara, Hiroshi, Asahi, Tsuyoshi, Sugiyama, Teruki
• Granted Patent: US 7,900,855 B2
• Time in Patent Office: Days
• US Class Current: 241/1
• CPC Class Codes: B01J 19/121 Coherent waves, e.g. laser beams lasers per se H01S3/00
• CPC Class Codes: B82Y 30/00 Nanotechnology for materials or surface science, e.g. nanocomposites
• CPC Class Codes: B82Y 40/00 Manufacture or treatment of nanostructures
• CPC Class Codes: C01B 32/15 Nano-sized carbon materials
• CPC Class Codes: C01B 32/156 After-treatment

Abstract

The present invention provides a fullerene suspension and a method for producing a fullerene suspension having high dispersion stability without any chemical compound. Also, the fullerene suspension and its producing method makes it possible to be applied in various fields including the field of medical and pharmaceutical science and the field of foods and environment, in which the fullerene suspension obtained by the prior methods had not been applied. The fullerene is ground to form nanoparticles by irradiating a fullerene in a poor solvent with a laser. The pulse laser having a width of several-ten femtoseconds to several-hundred nanoseconds is appropriately applied.

Claims

1. A method for producing fullerene suspension comprising:

irradiating fullerene particles in water with pulse laser to crush the fullerene particles into the nanoparticles,

wherein the pulse laser is irradiated at excitation light intensity of 30 to 50 mJ/cm².

2. The method for producing the fullerene suspension according to claim 1, wherein the step of irradiating fullerene particles in water with pulse laser includes stirring the fullerene particles mixed with water.

3. The method for producing the fullerene suspension according to claim 1, wherein the pulse laser has a width of several-ten femtoseconds to several-hundred nanoseconds.

4. The method for producing the fullerene suspension according to claim 2, wherein the pulse laser has a width of several-ten femtoseconds to several-hundred nanoseconds.

5. The method for producing the fullerene suspension according to claim 1, wherein the fullerene is C₆₀ fullerene.

6. The method for producing the fullerene suspension according to claim 2, wherein the fullerene is C₆₀ fullerene.

7. The method for producing the fullerene suspension according to claim 3, wherein the fullerene is C₆₀ fullerene.

8. The method for producing the fullerene suspension according to claim 4, wherein the fullerene is C₆₀ fullerene.