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. 2023 Dec 5;14:7875. doi: 10.1038/s41467-023-43594-4

Fig. 4. Formation of sharp microfiber carbon array in delignified wood.

Fig. 4

a Photographs showing delignified wood (DW) and DW carbonized at 1500 °C (cDW). b Mechanism for the formation of vertically aligned microfiber arrays in cDW. c Total light reflectance of cW and cDW. SEM images of (d) DW and (e) cDW obtained at 1500 °C. Ray cells, lumens and vessels were colored in green, indigo, and cyan, respectively. f Top-view SEM image showing the cross-section of DW carbonized at 1500 °C. g, h Side-view SEM images showing the morphology and dimension of vertically aligned carbon microfiber arrays. i Total light reflectance (at λ = 700 nm) of cDW and lignin content of DW as a function of delignification time. j Simulated light reflectance of cW compared to cDW microfiber arrays with varied inter-fiber porosity. k Total light reflectance (TR, at λ = 700 nm) of cW and cDW as a function of balsa wood density.