Title:
CORE-SHELL STRUCTURE HAVING CONTROLLED CAVITY INSIDE AND STRUCTURE COMPRISING THE CORE-SHELL STRUCTURE AS COMPONENT, AND METHOD FOR PREPARATION THEREOF
Document Type and Number:
WIPO Patent Application WO/2003/072488
Kind Code:
A1
Abstract:
A core-shell structure, characterized in that it comprises a core (2) comprising nano-particles and a shell (4) covering the core (2) and has a controlled cavity (3) formed by the core (2) and the shell (4); and a method for preparing the core-shell structure which comprises forming particles comprising a semiconductor, metal or polymer capable of dissolving through absorption of a light and covering the particles with a shell (4) comprising a semiconductor, metal or polymer not dissolving by a light, to form a core-shell structure (5), and irradiating the core-shell structure with a light having a controlled wave length, to form a controlled cavity (3) within the core-shell structure according to the size selection optical etching method. The core-shell structure allows the preparation of a catalyst exhibiting an extremely high efficiency, and can be used as a base for preparing a nano-material required for a nano-device.
Inventors:
TORIMOTO TSUKASA (JP)
OTANI BUNSHO (JP)
IWASAKI KENTARO (JP)
OTANI BUNSHO (JP)
IWASAKI KENTARO (JP)
Application Number:
PCT/JP2003/001651
Publication Date:
September 04, 2003
Filing Date:
February 17, 2003
Export Citation:
Assignee:
JAPAN SCIENCE & TECH CORP (JP)
TORIMOTO TSUKASA (JP)
OTANI BUNSHO (JP)
IWASAKI KENTARO (JP)
TORIMOTO TSUKASA (JP)
OTANI BUNSHO (JP)
IWASAKI KENTARO (JP)
International Classes:
B01J13/02; B01J27/04; B01J33/00; B01J35/00; B82B1/00; B82B3/00; C01G11/02; B01J31/02; (IPC1-7): B82B1/00; B82B3/00; C01G11/02; C01B33/113; C01B33/12
Foreign References:
| EP0726228A1 | 1996-08-14 |
Other References:
YADONG YIN ET AL.: "Synthesis and characterization of mesoscopic hollow spheres of ceramic materials with functionalized interior surfaces", CHEMISTRY OF MATERIALS, vol. 13, no. 4, April 2001 (2001-04-01), pages 1146 - 1148, XP001083273
TSUKASA TORIMOTO ET AL.: "Characterization of ultrasmall CdS nanoparticles prepared by the size-selective photoetching technique", JOURNAL OF PHYSICAL CHEMISTRY B, vol. 105, no. 29, 26 July 2001 (2001-07-26), pages 6838 - 6845, XP002254498
TSUKASA TORIMOTO ET AL.: "Preparation of novel silica-cadmium sulfide composite nanoparticles having adjustable void space by size-selective photoetching", JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, vol. 125, no. 2, 15 January 2003 (2003-01-15), pages 316 - 317, XP002969424
See also references of EP 1479649A4
TSUKASA TORIMOTO ET AL.: "Characterization of ultrasmall CdS nanoparticles prepared by the size-selective photoetching technique", JOURNAL OF PHYSICAL CHEMISTRY B, vol. 105, no. 29, 26 July 2001 (2001-07-26), pages 6838 - 6845, XP002254498
TSUKASA TORIMOTO ET AL.: "Preparation of novel silica-cadmium sulfide composite nanoparticles having adjustable void space by size-selective photoetching", JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, vol. 125, no. 2, 15 January 2003 (2003-01-15), pages 316 - 317, XP002969424
See also references of EP 1479649A4
Attorney, Agent or Firm:
Hirayama, Kazuyuki (Shinjukugyoen Bldg. 2-3-10, Shinjuk, Shinjuku-ku Tokyo, JP)
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