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Copper nanoparticles and method for producing the same, copper nanoparticle dispersion, copper nanoink, method for preserving copper nanoparticles, and sintering method for copper nanoparticles
Copper nanoparticles and method for producing the same, copper nanoparticle dispersion, copper nanoink, method for preserving copper nanoparticles, and sintering method for copper nanoparticles
In the present invention, oxidation of copper is suppressed, and since the average particle diameter is 10 nm or less, the melting point drops remarkably, the dispersibility is high, the sintering can be performed at low temperature, and the protective layer is cured at a low temperature Provided copper nanoparticles which can be removed at the time of sintering and which can be suitably used for conductive copper nanoink material, can stably preserve copper nanoparticles at room temperature for a long time, preserve copper nanoparticles which can be transported And to provide a method. The present invention relates to copper nanoparticles formed from a central portion made of a single crystal of copper and a protective layer surrounding it,(1) the copper nanoparticles have an average particle size of 10 nm or less,(2) the protective layer contains at least one selected from primary alcohols having 3 to 6 carbon atoms, secondary alcohols having 3 to 6 carbon atoms and derivatives thereof,(3) The protective layer has a boiling point or thermal decomposition temperature of 150 C. or less.Which is a copper nano particle.
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