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Kirigami Graphene Transistors for Biological Sensing
Ethan Minot, Department of Physics, Oregon State University
As flexible, locally amplifying probes, graphene transistors have potential applications in biological sensing, particularly for read-out of extracellular potentials. I will present measurements exploring this application.Charge carrier mobility in graphene remains high (~ 5000 cm2/Vs) in biological environments, and the thermal noise floor is competitive with traditional sensors.The graphene is etched into patterns inspired by the Japanese paper art of kirigami to permit in-plane stretching. We can maneuver and stretch devices in an electrolyte solution while monitoring their electrical response. The flexibility of these devices makes them promising as wearable electronics for cells, and we present early results on interactions between graphene devices and cardiomyocyte cells.
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