GOLD NANOPARTICLE DISPERSION LIQUID AND METHOD FOR PRODUCING THE SAME

PROBLEM TO BE SOLVED: To provide a gold nanoparticle dispersion liquid capable of forming a thin film having a high electric conductivity when dried at a normal temperature, and to provide a method for producing the same.SOLUTION: A gold nanoparticle covered with an extremely thin hydrophilic organi...

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Hauptverfasser:	YAMAUCHI HIROSHI, SATO IICHI
Format:	Patent
Sprache:	eng
Schlagworte:	ADHESIVES CASTING CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMICAL PAINT OR INK REMOVERS CHEMISTRY COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS CORRECTING FLUIDS DYES FILLING PASTES INKS MAKING METALLIC POWDER MANUFACTURE OF ARTICLES FROM METALLIC POWDER METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS PAINTS PASTES OR SOLIDS FOR COLOURING OR PRINTING PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL POLISHES POWDER METALLURGY PREPARATION OF CARBON BLACK THEIR RELEVANT APPARATUS TRANSPORTING TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS,TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES USE OF MATERIALS THEREFOR WOODSTAINS WORKING METALLIC POWDER
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a gold nanoparticle dispersion liquid capable of forming a thin film having a high electric conductivity when dried at a normal temperature, and to provide a method for producing the same.SOLUTION: A gold nanoparticle covered with an extremely thin hydrophilic organic monomolecular film (about 0.5 nm thick) is synthesized and dispersed in water, and ultrasonic wave is applied to a gold nanoparticle dispersion liquid for a long time to partially remove hydrophilic organic molecules from a gold nanoparticle surface. In the gold nanoparticle dispersion liquid, the average particle size of the gold nanoparticle is 10-20 nm, and the area occupied by mercapto-succinic acid or 2-mercapto-propionyl-glycine is 25-50 . After being dried, the gold nanoparticle dispersion liquid forms a conductive thin film with a metallic luster.