200 µL (2 mmol) octylamine was added to 500 µL synthesized WS2 dispersed in 500 µL toluene in a closed vial. The mixture was kept in the oven at 65°C. After 24h, the samples were centrifuged and washed 3 times with ethanol. Nanosheets were dispersed in 10 µL ethanol for PXRD characterization.