It depends on their purpose. However, starting from a copper(II) salt precursor you will need a reducing agent (i.e. borohydride, hypophosphite, ascorbic acid etc.), a capping agent to avoid crystal growth by steric and electronic forces and, if you want to synthesize very small nanoparticles, you might need a protective agent to avoid copper oxidation. The capping can be performed either on the forming metal particles (by cationic surfactants) and/or on the Cu(II) precursor. In the latter case you could use anionic surfactants or polymeric molecules rich of O and/or N such as PVP.

Does it help?

thank you for your answer, but i need to prepare it and then, i need to separate the particle to get it as powder and add it to polymer matrix.

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