In this riveting episode, we invite Dr. Iacopi, a leading figure in neuroscience and material science, to discuss his latest paper on developing and applying epitaxial graphene (EG) for brain-machine interfaces. This revolutionary work, published in the Journal of Neural Engineering, explores how EG grown on silicon carbide can potentially detect Electroencephalogram (EEG) signals in a more robust, efficient, and non-invasive manner.

Dr. Iacopi takes us through the advantages of dry EG electrodes, highlighting their superior skin contact impedance compared to traditional dry electrodes. He underscores their ability to maintain performance in highly saline environments, pushing the boundaries of what's possible in EEG technology.

One of the standout features of this conversation is the explanation of the newly discovered phenomenon of surface conditioning of the EG electrodes. Dr. Iacopi explains how extended contact with skin electrolytes results in a thin water film forming on the graphene's surface, reducing its contact impedance by more than three times. This intriguing effect, particularly noticeable in highly saline conditions, has substantial implications for enhancing the performance and reliability of EG sensors.

Join us in this episode for an enlightening journey into the future of brain-machine interfaces, on-skin sensors, and the game-changing potential of epitaxial graphene technology. Don't miss Dr. Iacopi's insights into how this research can revolutionize the field of neurotechnology.

doi: 10.1088/1741-2552/ac4085. PMID: 34874291.