Hydrothermal growth control of ZnSe·N2H4 nanobelts

Uniform and well-defined inorganic-organic hybrid nanobelts of the hexagonal wurtzite ZnSe center dot N2H4 having an average width of 200 nm, a mean thickness of 25 nm, and a typical length of a few micrometres have been grown facilely in an aqueous solution, and characterized by measuring photoluminescence spectra and kinetic profiles as well as diffraction patterns and electron microscopic images. The length-to-width and width-to-thickness ratios of ZnSe center dot N2H4 nanobelts have been controlled well by adjusting [Se]-to-[ZnCl2] ratios as well as reaction time and temperature in hydrazine-hydrate-assisted hydrothermal reactions. A sufficient amount of the selenium precursor has been found to be essential for the one-dimensional growth of crystalline ZnSe center dot N2H4 nanobelts. Photoluminescence from ZnSe center dot N2H4 nanobelts shifts to the red by 16 nm and increases 3.5 times with the increase of the [Se]-to-[ZnCl2] ratio. The mean lifetime of photoluminescence kinetics having three decay components of 18 ps, 85 ps, and 1300 ps increases with the length-to-width ratios of ZnSe center dot N2H4 nanobelts.