Fig. 3
SEM and FESEM images (750×, 1500×, and 3500× magnification) of zeo-L-BglACLEAs prepared with different concentrations of glutaraldehyde crosslinker. a non-crosslinked control, zeo-L-BglA, b 0.5% glutaraldehyde zeo-L-BglACLEAs, c 3% glutaraldehyde zeo-L-BglACLEAs, d 10% glutaraldehyde zeo-L-BglACLEAs. The b series of images were taken using a FESEM, which can operate at lower voltages than a standard SEM to reduce charging and image artefacts that occur when negative charges build up on a specimen. This phenomenon occurs in specimens that are not electrically grounded properly, as observed with the smaller particles