Publication number: 09278598
Date of publication of application: 28.10.1997
Application number: 08112066
Date of filing: 09.04.1996
Applicant: TAKAMI TOMOHIDE, INO SHOZO
Inventor: TAKAMI TOMOHIDE, INO SHOZO

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MICELLE TYPE METAL FINE PARTICLE AND ITS PRODUCTION
Abstract:

PROBLEM TO BE SOLVED: To obtain fine particles capable of using metal fine particles, which have been limited in use method and field hitherto, in various fields by absorbing molecular chain of an organic substance onto the surface of metal fine particles, and covering metal fine particles in micelle state.
SOLUTION: Micelle type metal fine particles 1 absorbing molecular chain 3 of organic substance having affinity for metal surface on the surface of multiple twin crystal particles 2 having 1-200 nm particle diameter exhibit properties based on the terminal functional group 4 of a molecular chain 3. As the metal fine particles, various kinds of metal fine particles such as chromium, ZnTe, selenium, aluminum and copper can be used and especially, twin crystal particles of gold, silver, nickel, palladium, platinum, etc., are preferable. An alkanethiol such as mercaptoacetic acid or beta-mercaptopropionic acid is used as the molecular chain 3 of the organic substance and carbon number of the alkyl chain is 2-18. Micelle type metal fine particles soluble in water are obtained by using a hydrophilic group such as hydroxyl group, carboxyl group, methyl group or phenyl group as the terminal functional group 4 of the molecular chain 3. Multiple twin crystal particles 2 are obtained by vacuum deposition onto substrate surface.