**2.4. Recipes for carbon nanomaterial synthesis**

We successfully synthesized SWCNTs, carbon nano-onions (CNOs) as well as graphene in the same reactor. Tuning the experimental parameters we switch the end type of nanomaterial. **Table 1** shows the parameters used for carbon nanomaterial synthesis. For SWCNTs synthesis, target must contain metallic catalyst grains. The parameters in the table are pressure in reaction chamber during ablation, oven temperature, laser pulse energy, repetition rate of laser pulses and the flow of inert gas.
