Graphene oxide (GO) provides a thinner support film of higher mechanical strength, electrical and thermal conductivity compared to support films made from other materials. GO support films are available on lacey carbon grids and Quantifoils.
Thin film apertures are frequently used in the objective lenses of high resolution and electron beam lithography instruments. These apertures have the advantage that they heat up in the beam and are effectively self cleaning. This minimises astigmatism caused by a build up of carbon contamination.