Figure 4From: Synthesis and Application of Carbon–Iron Oxide Microspheres’ Black Pigments in Electrophoretic Displays a CIOMBs with different etching time (from left to right 0, 1, 12 h) are dispersed in tetrachloroethylene. TEM images of CIOMBs with 1 h (b) and 12 h etchingBack to article page