Oxide membranes are starting to garner attention for energy applications. Manganese oxides are ubiquitous in nature. Due to it multivalent nature, Mn forms over 30 oxides with different structure and stoichiometry. Amongst them, hausmannite, Mn3O4 with the spinel structure has a wide bandgap and a high dielectric constant of 9.2, making it attractive for flexoelectricity. This is because flexoelectric tensor components are proportional to the dielectric susceptibility. Mn3O4 also has a quasi-layered structure along the [101] direction with long covalent bonds that are stronger than the van der Waals forces holding traditional layered materials but are weak enough to be cleaved. Previous studies have shown that Mn3O4 flakes can be cleaved along different crystallographic orientations by various chemical methods with relative ease. We used liquid-phase exfoliation with iso-propyl alcohol for the synthesis of ultrathin Mn3O4 membranes from Hausmannite, which we refer to as bulk Mn3O4. We obtained a uniform dispersion of the ultrathin membranes, as shown in the inset of Figure .