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Internal structure of the constructions: (A) section surface of SF-F; (B) section surface of SF-MS; (C) section surface of SFG-MS; (D) single fiber section of SF-MS; (E) 3D reconstruction of SF-MS; and (F) 3D-reconstruction of SFG-MS. The scale bar on (A–D) is 1 μm. The scanning area on (E,F) images is 13.7 × 12.7 × 2.25 μm3, the number of sections is 15, and the thickness of the section is 150 nm.
