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Figure 3
(a) Optical density A(t), measured using STXM 9-pad dose experiments, plotted with respect to the exposure time. Microtome film of NRE211 membrane (PFSA): green squares (1), C 1s patterning and imaging at 292.6 eV; blue triangles (2), F 1s patterning and imaging at 694 eV. Spin-coated DuPont-D521 ionomer (PFSA): red circles (3), patterning and imaging at 320 eV. Spin-coated PMMA film #1: black open diamonds (4), patterning at 300 eV, imaging at 288.45 eV. (Sample prepared and data measured by A. F. G. Leontowich.) Spin-coated PMMA film #2: black filled diamonds (5), C 1s, patterning at 320 eV imaging at 288.45 eV. All imaging is performed with 1 ms dwell, all patterning exposure times are incremented non-linearly. (b) Expansion of the dashed box in (a).

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