Surfactant mediated low temperature thermal decomposition route to zinc oxide nanocrystals

Zinc oxide nanocrystals were synthesized via thermal decomposition of a new precursor zinc malonate, [ZnCH2C2O4]·2H2O in the presence of surfactant stabilizers oleylamine (C18H35NH2) and triphenylphosphine ((C6H5)3P). The nanocrystals were characterized by X-ray diffraction, transmission electron microscopy, FT-IR and UV–visible spectroscopy. XRD pattern showed a hexagonal wurtzite structure of ZnO having average crystallite size of about 22 nm. The TEM image showed the nanocrystallites constituting the flower-like pattern to be of 25–55 nm sizes. The band gap luminescence was observed at 354 nm (∼3.50 eV) alongwith defect related blue emission at 450 nm (∼2.75 eV).