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. 2022 Apr 22;8(16):eabn0939. doi: 10.1126/sciadv.abn0939

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Fig. 1. — (A) The schematic illustration of CNT coalescence via annealing temperature. (B) Cross-sectional transmission electron microscopy (TEM) image of as-prepared CNT fibers with S·DWNT bundles. Cross-sectional TEM images of CNT fibers with MIW-CNT and C-CNT hybrid structures after annealing at (C) 1400, (D) 1700, (E) 2000, and (F) 2400°C. (G) TEM image of CNT fibers with a highly aligned GNR structure after annealing at 2700°C. High-resolution TEM images of (H) collapsed DWNT, (I) MIW-CNT, and (J) DWNT bundles wrapped with a collapsed SWNT.