Figure 4From: Cross-linking cellulose nanofibrils for potential elastic cryo-structured gels FESEM image of a gel prepared from nanofibrils linked with 1,800 g/mol PEI. Images acquired at relatively (A) low and (B) high magnifications. The image in (B) has been acquired from the area marked with a dotted rectangle in the image in (A). Note the nano-sized fibrils forming the network structure.Back to article page