Surface Polarity Determination of ZnO Spherical Particles Synthesized via Solvothermal Route

ZnO monodispersed microspheres exhibiting only a c(+)-plane on the surface were successfully synthesized by a novel soft-chemical solvothermal method with ethylene glycol (EG) and hexamethylenetetramine. The concentration of EG plays a critical role in the formation or these spherical particles. The spherical particles are dense and have hierarchical structure, where small crystallites are radially aligned along the c-axis. The polarity was determined using convergent-beam electron diffraction, and we established that the whole surface of the microspheres is a c(+)-plane.