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(Left) Time-dependent SFG signal intensities at 2840 and 2945 cm−1 as AATM molecules diffuse into d-PMMA films of different thicknesses: (a) 20, (b) 70, (c) 150, (d) 210, and (e) 269 nm. (Right) Diffusion kinetics fitted by the Fickian model. Reprinted with permission from ref. 135. (2004 American Chemical Society)
