Introduction of Spin Probes into Graphite Oxide Membranes with the Use of Supercritical Carbon Dioxide

A nitroxyl spin probe is introduced into graphite oxide membranes from a solution in supercritical carbon dioxide in various modes. It is shown that a slow pressure release makes it possible to introduce the probe without destroying the orientational order of graphene layers, i.e., without destroying the internal structure of a membrane.