A Novel Polyaniline Nanofiber Combined with Toluidine Blue as a Sensitive Detection Platform for Lignin by Raman Spectroscopy

Figure 5

SEM image of wood slice treated with TB/PANI at the volume ratio of 1 : 1, 2 : 1, and 3 : 1 after ultrasonic dispersion 30 min (a) and 60 min (b).