Figure 2From: Different cellular response mechanisms contribute to the length-dependent cytotoxicity of multi-walled carbon nanotubesTEM photographs show the cellular uptake of MWCNTs. Cells were incubated overnight in media containing 50-μg/mL S- (a and b) and L-MWCNTs (c and d), and MWCNTs internalisation in MCF-7 (a and c) and RAW264.7 cells (b and d) were analysed by TEM as described in the ‘Methods’ section.Back to article page