Figure 1From: Critical role of surface chemical modifications induced by length shortening on multi-walled carbon nanotubes-induced toxicity Electron microscopy images of PS- and L-CNT. Scanning electron microscopy (SEM, panel a, and c) images and Transmission electron microscopy (TEM, panel b, and d) images of PS-CNT (before length reduction by ultrasonic treatment, panel a and b) and L-CNT (panel c-d). Black arrows point toward iron-based nanoparticles.Back to article page