A convenient hydrothermal method has been successfully developed to prepare
nanocrystalline CuSe and Ag2Se, based on the reactions of CuCl2. 2H(2)O an
d AgNO3 with elemental selenium in dilute aqueous ammonia systems, respecti
vely. X-ray diffraction (XRD), transmission electron microscopy (TEM), and
X-ray photoelectron spectroscopy (XPS) examinations were carried out to det
ermine the phase, grain size, morphology, and purity of the products, The a
queous ammonia system plays an important role in the formation of nanocryst
alline CuSe and Ag2Se. A possible mechanism is proposed. (C) 2000 Elsevier
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