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Experimental setup for (a) PIC and (b) PHI. (c) 10 × 10 μm2 photothermal image of single 5 nm gold nanospheres using the PIC method and (d) 10 × 10 μm2 photothermal image of single 2 nm (short peaks) and 5 nm (tall peaks) gold nanospheres using the PHI method. Adapted from ref (88). Copyright 2008 American Chemical Society.
