Oleic acid and oleylamine were then injected into the mixture, which was then heated to 200°C for 2 h, heated to 350°C for 1.5 h, cooled to room temperature, treated with acetone to precipitate MnMEIO nanoparticles, centrifuged (12,000 rpm) to remove solvent and unreacted reagents, and redispersed in chloroform to yield MnMEIO nanoparticles.
Source: wiktionary