Extended Data Fig. 1: Raman spectra analysis of the cell walls of wood fibres from natural and delignified wood.
From: Low-value wood for sustainable high-performance structural materials
a, Optical microscope image of the natural wood. Inset: Raman mapping of the natural wood cell walls. b, Raman spectra at different regions of the natural wood including the cell wall (CW), middle lamella (ML), and cell corner of middle lamella (CCML). The characteristic bands of lignin occur at 1605 and 1667 cm−1. c, Optical microscope image of the delignified wood. Inset: Raman mapping of the delignified wood cell walls. d, Raman spectra of the delignified wood showing the disappearance of Raman characteristic bands of lignin in CW, ML and CCML, demonstrating the removal of lignin.
