Fig. 2

Bright field images of the cell wall of the control and ILs-pretreated Eucalyptus (a). Selected areas (blue rectangle) shown in bright field images were used for Raman imaging. Raman images of the main components distribution in the Eucalyptus cell walls before (control) and after each ILs pretreatment by integrating from 1560 to 1625 cm⁻¹ (b) and from 2830 to 2920 cm⁻¹ (c)