Fig. 1From: Non-homogeneous dispersion of graphene in polyacrylonitrile substrates induces a migrastatic response and epithelial-like differentiation in MCF7 breast cancer cellsSEM images of the top surface (A–H) and cross section (I–L) of the indicated PAN/G membranes. Surface images are at a magnification of × 1000 (A–D) and × 5000 (E–H) and cross section images are at × 1000 (I–L). Scale bars: 10 μm (A–D) and 1 μm (E–L)Back to article page