Low temperature synthesis and characterization of rosette-like nanostructures of ZnO using solution process

Rosette-like structures of ZnO were synthesized at low temperature (60 °C) using solution process over 20 min of time. Hydroxylamine hydrochloride was used as capping agent with zinc nitrate hexahydrate and sodium hydroxide. Transition from triangular shaped plate like particles to rosette-like structure and to individual nanorods is observed with increasing refluxing temperature. Single-crystalline nature with wurtzite hexagonal phase is confirmed from transmission electron microscopic observations. Photoelectron spectroscopic measurement presented spectra close to the standard bulk ZnO, with an O 1s peak composed of surface adsorbed O–H group, O^2? in the oxygen vacancies on ZnO structure and ZnO.