MICROPARTICLES AND METHODS FOR THEIR PRODUCTION

Title:

MICROPARTICLES AND METHODS FOR THEIR PRODUCTION

Document Type and Number:

WIPO Patent Application WO2003057359

Kind Code:

A3

Abstract:

Microparticles having a metal-containing core encapsulated in a graphitic shell containing hetero atoms are made by forming, in a liquid medium, colloidal particles containing a metal-oxo species of Fe, Co, Ni and Pd, colloidally stabilized by a surfactant and containing source material of carbon and the hetero atoms. These particles are pyrolyzed in inert gas to yield the microparticles. In an alternative method, silica gel coated particles are formed by colloidally stabilizing particles containing metal species and forming silica at the boundary of the stabilized particle.

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Inventors:

TSANG SHIK CHI (GB)
CHAN HENRY BO SO (GB)

Application Number:

PCT/GB2003/000029

Publication Date:

August 28, 2003

Filing Date:

January 07, 2003

Export Citation:

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Assignee:

UNIV READING (GB)
TSANG SHIK CHI (GB)
CHAN HENRY BO SO (GB)

International Classes:

A61K9/50; A61K9/51; A61K47/48; B01J13/02; C01G49/00; C01G51/00; C09C1/24; C09C3/12; (IPC1-7): B01J13/02; A61K9/50; C01B31/02; C09C3/06

Domestic Patent References:

WO2002000192A2

2002-01-03

Foreign References:

US20010051766A1	2001-12-13
US5472749A	1995-12-05
US6009457A	1999-12-28

Other References:

GADD G E ET AL: "The encapsulation of Ni in graphitic layers using C60 as a precursor", CARBON, XX, XX, vol. 39, no. 12, October 2001 (2001-10-01), pages 1769 - 1787, XP004299747, ISSN: 0008-6223

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