Articles containing copper nanoparticles and methods for production and use thereof

摘要

Articles containing a matrix material and plurality of copper nanoparticles in the matrix material that have been at least partially fused together are described. The copper nanoparticles are less than about 20 nm in size. Copper nanoparticles of this size become fused together at temperatures and pressures that are much lower than that of bulk copper. In general, the fusion temperatures decrease with increasing applied pressure and lowering of the size of the copper nanoparticles. The size of the copper nanoparticles can be varied by adjusting reaction conditions including, for example, surfactant systems, addition rates, and temperatures. Copper nanoparticles that have been at least partially fused together can form a thermally conductive percolation pathway in the matrix material.

主权项

1. A method comprising:
providing a plurality of copper nanoparticles that are mixed with a matrix material to form a paste;
wherein the plurality of copper nanoparticles are less than about 20 nm in size and further comprise a surfactant system comprising a bidentate diamine and one or more C6-C18 alkylamines; placing the paste in a joint between a first member and a second member; and joining the first member to the second member by at least partially fusing the plurality of copper nanoparticles together;
wherein the copper nanoparticles are present as a thermally conductive percolation pathway within the matrix material upon being at least partially fused together.