2.4.6. Scanning electron microscopy (SEM)
SEM imaging of the Upsalite was performed with a Leo 1550
FEG microscope (Zeiss, Oberkochen, Germany) equipped with an
in-lens detector. A thin gold/palladium layer was sputtered onto
samples prior to analysis to avoid charging of the samples. The
analysis was performed at 1.5 kV acceleration voltage