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Polarized UV−vis absorption spectra of (a) the spin‐cast film and (b) the surface‐grafted film of PAz before and after exposure to LPL at 436 nm and 60 °C. Dotted and solid lines are spectra taken with a non‐polarized beam and polarized beams set perpendicular (A⊥) and parallel (A∥) to the actinic LPL at 436 nm, respectively. Adapted with permission from reference [15]. Copyright 2009, American Chemical Society.
