 The synthesis of CU nanoparticles has attracted attention due to its potential for replacing expensive nano-silver inks in conductive printing, but the tendency of these particles to oxidize in ambient conditions is a major problem that can be solved by coating them with a protective layer such as an organic polymer or inorganic materials. This enables high conductivities and opens new possibilities in printed electronics for devices like solar cells, RFID tags, and electroluminescence devices. The paper reviews wet chemistry routes for synthesizing copper nanoparticles and their utilization in printed electronics. This article was authored by Shlomo Magdasi, Alexander Kamyshnyi, and Michael Grouchko.