Fabrication of submicron barium sulfate aggregates in the presence of ethylenediaminetetraacetic acid anions

- Monodispersed spherical BaSO4 aggregates with an average size of 0.5 μm were fabricated at pH 7.
- The as-prepared particles were composed of interconnected nanoballs and self-assembled structures.
- Surface self-assembly and transformation mechanism was proposed which was directed by EDTA anions.
- The adsorption of OH− anions onto the surface of BaSO4 influenced the particle morphology.