The Phosphorene-C60 non-covalent interaction has also been confirmed by the disappearance of the C60 absorption band at 340 nm in phosphorene Langmuir-Blodgett films after a simple toluene wash . In this regard, density functional theory (DFT) computations supported a simple physical interaction between C60 and phosphorene characterized by strong electron density rearrangements (charge transfer) and adsorption energies of 1 eV .