Figure 2
Two absorption-contrast images of pre-oxidized polyacrylonitrile fibre cross section at E2 = 528.5 eV (a) and E1 = 532.5 eV (b). The image size, step and number of pixels are 13 µm × 13 µm, 50 nm and 261 × 261, respectively. The difference between the two images is not evident to the naked eye. |