Fig. 2. (a) Preparation of delignified wood template, (b) delignified wood sample immersed in liquid inside the cuvette, delignified (c) balsa and (d) birch samples immersed in different liquids (see Table 1) showing difference in light transmission. Note the background is black. Transmittance spectra for (e) balsa and (f) birch samples immersed in six different liquids 1–6.
