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SEM images of platinum nanothorns. (a) Large area SEM image; (b) high magnification SEM image of a platinum nanothorn; (c) side view of a nanothorn; (c) top view of a nanothorn. The scale bar in (b), (c), and (d) is 100 nm. Reproduced with permission from Reference (226). Royal Society of Chemistry, Copyright (2006).
