Figure 2
From: Impact of carbon nanotubes and graphene on immune cells
Status of carbon nanomaterials publications in the last 8 years. A) Analysis of the amount of publications of f-CNTs and graphenes and their interactions with immune cells (2005 to September 2013). B) Percentage of publications based on the different kinds of f-CNTs categorized by their number of graphite layers: single-walled (SWCNTs), double-walled (DWCNTs) and multi-walled (MWCNTs).