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SEM image of pristine CNT (photograph of a flexible CNT in inset) (a); TEM image of pristine CNT (b); SEM image of p-sulfonated poly(allyl phenyl ether) (SPAPE)-coated CNT and (c) TEM image of SPAPE-coated CNT (d); and EDS spectra of pristine CNT (the inset is the corresponding TEM image) (e).
