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Low- to high-magnification SEM images of (a,b) TW-Car ((b): Zoomed-in image of the area circled in (a)) and (d,e) HCl-TW-Car ((e): Zoomed-in image of the area circled in (d)); EDS spectra of (c) TW-Car and (f) HCl-TW-Car from analysis of SEM images.
