A novel method has been developed for the preparation of crystalline nanotubes of copper selenide (CuSe). The method was based on template-directed synthesis in which the trigonal Se nanotubes were used as a template-directed reagent. Apart from CuSe nanotubes, one-direction (1D) nanocrystallites of Cu 3 Se 2 , Cu 2-x Se, and Cu 2 Se were also obtained by changing the atom ratio of Cu and Se in the precursors. The products were characterized by scanning electron microscopy (SEM), X-ray diffractometry (XRD), laser Raman spectrography (LRS), and X-ray photoelectron spectroscopy (XPS). On the basis of a series of experiments and characterizations, the formation mechanism of the CuSe nanotubes is discussed.

A novel chemical method has been developed for the preparation of crystalline nanotubes of silver selenide (Ag2Se). The method is based on the template-engaged synthesis in which the trigonal Se nanotubes as-prepared were used as template reagent. The products were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), energy-dispersive X-ray analysis (EDX), transmission electron microscopy (TEM), ultraviolet (UV) analysis, photoluminescence (PL) analysis, differential scanning calorimetric (DSC) analysis, and thermogravimetric (TG) analysis. Based on a series of experiments and characterizations, the formation mechanism of the Ag2Se nanotubes was proposed. Furthermore, the useful electrochemical behavior of the Ag2Se nanotubes was studied by the voltammetric technique.

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