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Typical force–distance (F–D) curves of PHEMA thin layer surfaces (312–387 nm) irradiated with a different number of laser pulses (250 J m−2 per laser pulse): (a) F–D curves of non-irradiated layer; (b) F–D curves with 20 laser pulses; (c) F–D curves with 100 laser pulses; (d) F–D curves with 200 laser pulses.
