In our research, hierarchical nano/microscale α-Fe2O3 iron oxide particle system was prepared by modified polyol method with NaBH4 and heat treatment at 900 °C in air. The grain and grain boundary textures of hierarchical nano/microscale α-Fe2O3 oxide particles have been carefully analyzed for the limitation of grain growth in the specific micro/nano oxide structures. | Investigation of surfaces of novel iron oxides with grain and grain boundary