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Figure 3
Optical density images of radiation damage of (a) PMMA/PAN bilayer, (b) poly(MMA-co-AN) and (c) PECA. These images are actually relative optical density images, which were converted from their transmission images by normalization to the maximum intensity of each individual transmission image. Four lines were exposed with the same slit settings, dwell time per pixel and pixel spacing, at four photon energies, respectively: 285.1 eV (neither species absorbs), 286.8 eV (only PAN absorbs), 288.4 eV (mainly PMMA absorbs, with a small PAN contribution) and 290.0 eV (both species absorb). The region of the sample exposed in this way was that imaged at the same four photon energies to evaluate the selectivity of radiation damage.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 14| Part 2| March 2007| Pages 181-190
doi:10.1107/S0909049506053829
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