Patents by Inventor Sunao Yamada
Sunao Yamada has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 9035169Abstract: A layered compound-metal particle composite 3 is obtained by the addition, to an organically modified layered compound 1 formed by the intercalation of organic ions between layers of a layered compound, of both an aqueous colloidal metal solution 2 in which metal particles are dispersed as a metal colloid in water, and a nonaqueous solvent which is a poor solvent for the metal colloid and has an excellent ability to swell the organically modified layered compound 1.Type: GrantFiled: February 14, 2012Date of Patent: May 19, 2015Assignee: KYUSHU UNIVERSITYInventors: Sunao Yamada, Masahi Ogawa, Takashi Kurihara, Kengo Ito
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Publication number: 20140076384Abstract: A layered compound-metal particle composite 3 is obtained by the addition, to an organically modified layered compound 1 formed by the intercalation of organic ions between layers of a layered compound, of both an aqueous colloidal metal solution 2 in which metal particles are dispersed as a metal colloid in water, and a nonaqueous solvent which is a poor solvent for the metal colloid and has an excellent ability to swell the organically modified layered compound 1.Type: ApplicationFiled: February 14, 2012Publication date: March 20, 2014Applicant: KYUSHU UNIVERSITYInventors: Sunao Yamada, Masashi Ogawa, Takashi Kurihara, Kengo Ito
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Patent number: 8182574Abstract: The present invention provides metal fine particles which have selective wavelength absorption characteristics in a wavelength region from visible light to near infrared light, and have sharp absorption characteristics, and influences little the surrounding wavelength, and therefore, they yield tones having high chroma. The present invention provides metal fine particles wherein an aspect ratio is in a range from 1.1 to 8.0, a maximum absorption wavelength in plasmon absorption is in a range from 400 nm to 1,200 nm, and an absorption coefficient at a peak position of the maximum absorption wavelength is in a range from 6,000 to 20,000 L/mol·cm (measurement concentration: 1.6×10?4 mol/L, and solvent: water).Type: GrantFiled: March 24, 2010Date of Patent: May 22, 2012Assignees: Mitsubishi Materials Corporation, Dai Nippon Toryo Co., Ltd.Inventors: Yoshiaki Takata, Hiroki Hirata, Jun-etsu Satoh, Yasuro Niidome, Sunao Yamada, Koji Nishioka, Hideya Kawasaki, Daigou Mizoguchi, Masanori Nagai, Masato Murouchi, Masaoki Ishihara
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Patent number: 7976609Abstract: A method for manufacturing metal nanorods includes: a step of adding a reducing agent to a metallic salt solution; a step of radiating light into the metallic salt solution containing the reducing agent; and a step of leaving the light-radiated metallic salt solution containing the reducing agent stationary in a dark place so as to grow metal nanorods. Metal nanorods can be also grown by forming a mixed solution by fractionating the above light-radiated metallic salt solution and mixing the fractionated metallic salt solution into a non-radiated metallic salt solution containing the reducing agent, or mixing a non-radiated metallic salt solution and the reducing agent into the above light-radiated metallic salt solution; and leaving the mixed solution stationary in a dark place so as to grow metal nanorods.Type: GrantFiled: February 11, 2010Date of Patent: July 12, 2011Assignees: Mitsubishi Materials Corporation, Dai Nippon Toryo Co., Ltd.Inventors: Yasuro Niidome, Sunao Yamada, Koji Nishioka, Hideya Kawasaki, Hiroki Hirata, Daigou Mizoguchi, Yoshiaki Takata, Jun-etsu Satoh, Masaoki Ishihara, Masanori Nagai, Masato Murouchi
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Publication number: 20100229684Abstract: The present invention provides metal fine particles which have selective wavelength absorption characteristics in a wavelength region from visible light to near infrared light, and have sharp absorption characteristics, and influences little the surrounding wavelength, and therefore, they yield tones having high chroma. The present invention provides metal fine particles wherein an aspect ratio is in a range from 1.1 to 8.0, a maximum absorption wavelength in plasmon absorption is in a range from 400 nm to 1,200 nm, and an absorption coefficient at a peak position of the maximum absorption wavelength is in a range from 6,000 to 20,000 L/mol·cm (measurement concentration: 1.6×10?4 mol/L, and solvent: water).Type: ApplicationFiled: March 24, 2010Publication date: September 16, 2010Applicants: Mitsubishi Materials Corporation, Dai Nippon Toryo Co., Ltd.Inventors: Yoshiaki Takata, Hiroki Hirata, Jun-etsu Satoh, Yasuro Niidome, Sunao Yamada, Koji Nishioka, Hideya Kawasaki, Daigou Mizoguchi, Masanori Nagai, Masato Murouchi, Masaoki Ishihara
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Publication number: 20100143184Abstract: A method for manufacturing metal nanorods includes: a step of adding a reducing agent to a metallic salt solution; a step of radiating light into the metallic salt solution containing the reducing agent; and a step of leaving the light-radiated metallic salt solution containing the reducing agent stationary in a dark place so as to grow metal nanorods. Metal nanorods can be also grown by forming a mixed solution by fractionating the above light-radiated metallic salt solution and mixing the fractionated metallic salt solution into a non-radiated metallic salt solution containing the reducing agent, or mixing a non-radiated metallic salt solution and the reducing agent into the above light-radiated metallic salt solution; and leaving the mixed solution stationary in a dark place so as to grow metal nanorods.Type: ApplicationFiled: February 11, 2010Publication date: June 10, 2010Applicants: MITSUBISHI MATERIALS CORPORATION, DAI NIPPON TORYO CO., LTD.Inventors: Yasuro Niidome, Sunao Yamada, Koji Nishioka, Hideya Kawasaki, Hiroki Hirata, Daigou Mizoguchi, Yoshiaki Takata, Jun-etsu Satoh, Masaoki Ishihara, Masanori Nagai, Masato Murouchi
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Patent number: 7691176Abstract: A method for manufacturing metal nanorods includes: a step of adding a reducing agent to a metallic salt solution; a step of radiating light into the metallic salt solution containing the reducing agent; and a step of leaving the light-radiated metallic salt solution containing the reducing agent stationary in a dark place so as to grow metal nanorods. Metal nanorods can be also grown by forming a mixed solution by fractionating the above light-radiated metallic salt solution and mixing the fractionated metallic salt solution into a non-radiated metallic salt solution containing the reducing agent, or mixing a non-radiated metallic salt solution and the reducing agent into the above light-radiated metallic salt solution; and leaving the mixed solution stationary in a dark place so as to grow metal nanorods.Type: GrantFiled: May 13, 2004Date of Patent: April 6, 2010Assignees: Mitsubishi Materials Corporation, Dai Nippon Toryo Co., Ltd.Inventors: Yasuro Niidome, Sunao Yamada, Koji Nishioka, Hideya Kawasaki, Hiroki Hirata, Yoshiaki Takata, Jun-etsu Satoh, Daigou Mizoguchi, Masaoki Ishihara, Masanori Nagai, Masato Murouchi
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Publication number: 20060266157Abstract: The present invention provides metal fine particles which have selective wavelength absorption characteristics in a wavelength region from visible light to near infrared light, and have sharp absorption characteristics, and influences little the surrounding wavelength, and therefore, they yield tones having high chroma. The present invention provides metal fine particles wherein an aspect ratio is in a range from 1.1 to 8.0, a maximum absorption wavelength in plasmon absorption is in a range from 400 nm to 1,200 nm, and an absorption coefficient at a peak position of the maximum absorption wavelength is in a range from 6,000 to 20,000 L/mol·cm (measurement concentration: 1.6×10?4 mol/L, and solvent:water).Type: ApplicationFiled: September 2, 2004Publication date: November 30, 2006Applicant: Dai Nippon Toryo Co., Ltd.Inventors: Yoshiaki Takata, Hiroki Hirata, Jun-etsu Satoh, Yasuro Niidome, Sunao Yamada, Koji Nishioka, Hideya Kawasaki, Daigou Mizoguchi, Masanori Nagai, Masato Murouchi, Masaoki Ishihara
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Publication number: 20060196309Abstract: A method for manufacturing metal nanorods includes: a step of adding a reducing agent to a metallic salt solution; a step of radiating light into the metallic salt solution containing the reducing agent; and a step of leaving the light-radiated metallic salt solution containing the reducing agent stationary in a dark place so as to grow metal nanorods. Metal nanorods can be also grown by forming a mixed solution by fractionating the above light-radiated metallic salt solution and mixing the fractionated metallic salt solution into a non-radiated metallic salt solution containing the reducing agent, or mixing a non-radiated metallic salt solution and the reducing agent into the above light-radiated metallic salt solution; and leaving the mixed solution stationary in a dark place so as to grow metal nanorods.Type: ApplicationFiled: May 13, 2004Publication date: September 7, 2006Applicants: Yasuro Niidome, Mitsubishi Materials Corporation, Dai Nippon Toryo Co., Ltd.Inventors: Yasuro Niidome, Sunao Yamada, Koji Nishioka, Hideya Kawasaki, Hiroki Hirata, Yoshiaki Takata, Jun-etsu Satoh, Daigou Mizoguchi, Masaoki Ishihara, Masanori Nagai, Masato Murouchi
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Publication number: 20050235777Abstract: A method for forming a fine structure of metal fine particles includes a step [FIG. 1(a)] of substituting a part of metal fine particles stabilized by a dispersion stabilizer desorbed when irradiated with an electromagnetic wave of high energy and/or high energy density and a dispersing agent from the surface of the metal fine particles when irradiated with an electromagnetic wave of a lower energy and/or a lower energy density and/or a compound having no bonding ability to the metal fine particles so as to prepare a colloidal solution of the metal fine particles, irradiating the colloidal solution with the electromagnetic wave of high energy and/or high energy density, and thereby improve the photosensitivity of the metal fine particles dispersed solution, and a step [FIG.Type: ApplicationFiled: June 23, 2003Publication date: October 27, 2005Inventors: Sunao Yamada, Yasuro Niidome