A simple technique for the preparation of ultra-thin carbon films for electron microscopy

Ultra-thin supporting membranes of carbon are valuable in electron microscopy of biological samples and for some applications as examination of fine particles or thin metallic films obtained by vacuum evaporation which require high resolution. A simple method has been developed for production of support films thinner than 20 Å. These specimen supports show a good mechanical stability and a total open area of a 400-mesh grid is usable.