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. 2020 Jun 16;12:127. doi: 10.1007/s40820-020-00452-y

Fig. 1.

Fig. 1

Characterization of MnO2@Ce6. a TEM and b SEM image of MnO2 nanoparticles. c TEM and d SEM image of MnO2@Ce6 nanoprobes. e Size distribution of MnO2 and MnO2@Ce6. f UV–vis absorption spectra of MnO2, Ce6, and MnO2@Ce6 solutions