Protoplast viability analysis after exposure to 50 μg/ml SWCNTs in a WI solution. a Microscopic image of SWCNTs aggregates. b Fluorescence microscope image of total protoplasts (protoplasts stained with PI and DAPI). c Fluorescence microscope image of dead protoplasts (stained with PI only). d Fluorescence-based assay showed that the inhibition activity of SWCNTs on the protoplasts as the percent of protoplasts stained with PI or the percent of loss of viability.
Yuan et al. Nanoscale Res Lett 2011 6:44 doi:10.1007/s11671-010-9799-3