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(a) Bright field (BF) TEM image of ZnS nanotubes with different diameters. As the BFTEM image was taken after all the maps, the nanotubes already show porous features after being exposed to the electron beam irradiation during the mapping process, [(b), (c), and (d)] Elemental maps of O, S, and Zn, taken at the O edge , S edge , and Zn edge , respectively.
[(a)–(d)] Low magnification TEM images taken from single ZnS nanotube after being exposed to , 100, 500, and electron beam irradiation, respectively; [(e)–(h)] the corresponding TED patterns taken from the same nanotube.
Bright field TEM image of a nanotube (a) before and (b) after prolonged electron beam irradiation; [(c) and (d)] the corresponding EDX spectra taken from the nanotube local regions as marked in (a) and (b), respectively.
[(a)–(c)] TED patterns taken from nanotubes after being exposed for to 120, 100, and accelerating voltages, respectively.
Typical compositions of the ZnS nanotubes before and after the irradiation damage (based on EDX spectra randomly taken at different locations on the nanotubes).
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