A hydrothermal method for low-temperature growth of nanocrystalline pyritenickel diselenide

Reaction of a selenium alkaline solution with a nickel complex aqueous solu tion produces nanocrystalline pyrite NiSe2 with an average particle size of about 20 nm in the temperature range of 90-100 degrees C through a hydroth ermal method. X-ray diffraction analysis indicates that the product is a si ngle phase of pyrite nickel diselenide. TEM and ED images show that the pro duct has a good crystallinity with a plate-like form. The synthesis can be performed conveniently and safely. (C) 2000 Elsevier Science B.V. All right s reserved.