Dear professor, I am now involved in the synthesis of hematite with different shapes, such as flake, rod and block. In the process of synthesizing the block hematite, oleic acid and sodium oleate were added to the synthesis. After 24h reaction in the hydrothermal reactor, the products could not be separated from oleic acid sodium oleate. I would like to ask about the better synthesis method.I want to know a better way to synthesize hematite nanocubes. the following is the SEM that I synthesized and bonded with oleic acid and sodium oleate