I have prepared my nanosuspension solution by sonicating 50mg zinc oxide nanoparticles in 10 mL distilled water. I am adding this to gelatin solution prepared using 1gm gelatin in 15 mL distilled water with 20 microlitre Gluteraldehyde.
How should I go about with the drying process?
Should I
a) refrigerate at -20°C for an hour or
b) freeze dry over night?
I'm open to any other suggestion too.
I'm putting them in a thin mould such that it looks like a flat gel.