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SEM images of laser-irradiated spots. The geometry was 200/100/500 (period/diameter/depth of porous alumina in nm) with 50 nm surface Pt. The levels of applied laser power were ~22 μJ/pulse (a), ~28 μJ/pulse (b), and ~36 μJ/pulse (c). Reprinted with permission from [69]. Copyright American Chemical Society, 2007.
