I have prepared graphene oxide oil-in-water emulsion. I want to characterize the emulsion under TEM to measure the thickness of the graphene oxide sheets that enwrapped the oil droplets. I have read that the characterization without using cryo environment can be done as long as the oil part is removed. I have done two different sample preparation; 1) isothermal treatment to remove the oil part of the diluted emulsion that was dropped on the lace carbon grid, then characterized (the droplet supposed to collapse and the thickness was taken on the overlapping of GO around the dried emulsion droplet), and 2) by dropping the emulsion disperse in ethanol directly on the lace carbon grid, let it dry and characterized. Both sample preparation failed to give me what I want, there is no dried droplet present under TEM. Any suggestions or recommendations?