Copper (Cu) Nanopowder/Nanoparticles

Copper nanoparticles are highly reactive and flammable, therefore it should be handled with care and rapid moves, vibrations should be avoided. 
Nanopowder should be kept away from sunlight, any kind of heating, moisture and impacts. Coagulation of the particles is a serious problem, so, 
nanopowder should be sealed under vacuum and should be kept in cool and dry conditions. Air contact should be avoided.