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. 2022 Dec 10;15:11. doi: 10.1007/s40820-022-00982-7

Fig. 2.

Fig. 2

a Cross-sectional SEM images of OB. b SEM images of the longitudinal section of OB. c Photograph of the cross section of S12. d Macroscopic view of S12. e Macroscopic view of S12 under the light. f Photograph of the cross section of H12. g Photograph of H12. h Photograph of H12 under the light