The Polish manufacturer NanoEMI has demonstrated the effectiveness of the graphene compounds it produces as shielding against electromagnetic interference fields.
The attenuation reaches up to 70 dB per 1 mm of graphene film thickness. This provides a new, advantageously lightweight alternative to traditional metallic shielding materials for ensuring the active and passive electromagnetic compatibility (EMC) of electronic systems against interference radiation over wide frequency ranges from several hundred MHz to THz.
This miracle material, which has been known since 2004, has thus found another remarkable application. Graphene has an extremely thin, two-dimensional structure with only one horizontally cross-linked layer of carbon atoms. Future applications include microelectronics, energy supply, smart cars and nanotechnology in general. The favorable properties of graphene for EMC applications are its high electrical and thermal conductivity, its mechanical strength and stiffness with minimal thickness, its almost complete transparency to visible light and its excellent effectiveness as a barrier material. Its large surface area makes it suitable as a catalyst and energy storage medium. In combination with other materials, polymers, ceramics or metals, compounds can be created that are considerably lighter and mechanically stronger than conventional shielding materials.
