What they are describing is the preparation procedure to enable images to be taken in a SEM. Grids are often used to catch particles that your trying to analyze, graphite (or graphene oxide) is coated onto the sample to dissipate electron build up so you can actually get an image.
Edit: Quick search of cryo-EM and sputtering techniques and reread of the procedure, it looks like the graphene oxide is used to increase particle count on the conductive gold grid. They are doing particle sizing and morphology imaging.
What they are describing is the preparation procedure to enable images to be taken in a SEM. Grids are often used to catch particles that your trying to analyze, graphite (or graphene oxide) is coated onto the sample to dissipate electron build up so you can actually get an image.
Edit: Quick search of cryo-EM and sputtering techniques and reread of the procedure, it looks like the graphene oxide is used to increase particle count on the conductive gold grid. They are doing particle sizing and morphology imaging.
Thanks, that sounds right.