Preparation and characterization of Cu2SnSe4 nanoparticles using a microwave-assisted polyol method

The microwave-assisted polyol method has been applied to the preparation of nanosized Cu2SnSe4, Cheap materials such as CuCl (Or CuCl2.2H(2)O), Sn and Se were used as starting materials. Polyethylene glycol (PEG) is the only solvent in which the reaction takes place and the materials did not react in ethylene glycol, tri-, or tetraethylene glycol, Mossbauer spectroscopic measurements revealed a single doublet whose isomer shift of 1.81 mm/s is typical of that seen in tetravalent covalent tin semiconductors. The final product was characterized by X-ray powder diffraction, transmission electron microscopy (TEM), high resolution TEM (HR-TEM), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and electron paramagnetic resonance (EPR) spectroscopy. ((C) Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004)