Abstract: The present invention is directed to a suspension and to a wet powder of reduced graphene oxide (rGO) and an organic solvent, wherein the concentration of the reduced graphene oxide in organic solvent is above 0.3 mg/mL, and wherein the mixture is stable for at least 5 days as measured in a Turbiscan™. The invention further discloses a polymer matrix comprising the rGO of said rGO suspension or wet powder and a polymer, and methods for the preparation of the rGO suspension or wet powder and the polymer matrix.

Abstract: A method of obtaining multilayer graphene includes the steps of depositing a first graphene monolayer having a protective layer on top thereof, on a sample having a second graphene monolayer grown on a metal foil. The method further includes the steps of attaching to the metal foil at least one second frame, the at least one first frame having a substrate and a thermal release adhesive polymer layer; and removing or detaching the metal foil. Suspended multilayer graphene or the deposited multilayer graphene is obtained by the previous method. A device having suspended multilayer graphene or deposited multilayer graphene is preferably a NEMs or MEMs sensor or a transparent electrode for example for a display or for an organic or inorganic light-emitting diode (OLED/LED).

Abstract: Equipment to automatically transfer a graphene monolayer deposited on a metal layer and protected with a polymer layer to a substrate, comprising at least one liquid inlet, at least one sensor to control the level and pH of the liquids, at least one liquid outlet to drain the liquids, a stirring element to homogenise the liquid mixture and a ramp to feed in the substrate and method to automatically transfer a graphene monolayer to a substrate, which uses said equipment.

Abstract: Devices and methods for determining the quality thin film materials are disclosed. The thin film materials are provided on substrates forming thin film material structures. The devices comprise a housing, a THz module with a THz source emitter and a THz detector, and a reflective base moveable relative to the THz module and configured to support the thin film material structures. The THz source emitter is configured to irradiate the thin film materials. The THz detector is configured to measure at least one reflection of the irradiation. The device is configured to calculate a parameter indicative of the quality of the thin film material based on said reflection measurements.

Abstract: A method of transferring graphene onto a target substrate having cavities and/or holes or onto a substrate having at least one water soluble layer is disclosed.

Abstract: A method for obtaining graphene oxide is provided comprising the steps of a) adding an acid and a salt to graphite for obtaining a graphite oxide, and b) exfoliating the graphite oxide by mixing it, wherein the steps a) and b) are carried out simultaneously in a high shear mixer.

Abstract: A method of manufacturing a graphene monolayer on insulating substrates from CVD graphene synthesis, comprising: applying a thermal release adhesive tape to the bottom graphene layer deposited at the bottom of the metal foil in the CVD graphene synthesis, detaching the thermal release adhesive tape and the bottom graphene layer from the metal foil via the application of heat, from 1° C. up to 5° C. higher than the release temperature of the thermal release adhesive tape so that the thermal release adhesive tape with the bottom graphene layer can be removed, obtaining a metal foil with a top graphene layer sample, and transferring the top graphene layer onto a substrate via a sacrificial protective layer.