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FESEM of (A) core–shell nanoparticles (FPEGSO-MLDH); (B) SEM–EDX spectra; (C) core–shell nanoparticles (FPVASO-MLDH); (D) SEM–EDX spectra. *The sampel holde ris made up of aluminum and this leads to a high percentage of aluminum as depicted in the spectra. Thus, it is not a reliable indication of aluminium content in the sample.
