Graphene nanoribbons show radiation resistance for fusion sensors
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University of Arizona researchers found that graphene nanoribbons survive gamma radiation, suggesting potential use as sensors in fusion reactors. The discovery addresses a critical challenge in fusion energy development: monitoring reactor conditions under extreme radiation. The findings open a path toward integrating nanoscale sensors into future fusion power plants.
The Radiation Test
University of Arizona researchers exposed graphene nanoribbons to gamma radiation doses comparable to those expected inside a fusion reactor. The nanoribbons, which are strips of graphene only a few atoms wide, maintained their structural integrity and electronic properties after irradiation. This resilience is a key requirement for any material used in reactor sensors.
Fusion Energy Hurdle
One major obstacle to commercial fusion power is the lack of sensors that can operate in the intense radiation environment of a reactor. Current electronic components degrade quickly under neutron and gamma bombardment. The graphene nanoribbons' survival suggests they could form the basis for durable, real-time monitoring systems.
Sensor Potential
The team demonstrated that the nanoribbons could detect changes in magnetic fields and temperature even after radiation exposure. This capability is critical for controlling plasma confinement in tokamak reactors. The findings were published in the journal ACS Applied Materials & Interfaces.
What's Next
The researchers plan to test the nanoribbons under neutron radiation, which is more damaging than gamma rays. It remains unclear whether the material will retain its properties in a full-scale reactor environment over extended periods.
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Graphene nanoribbons show radiation resistance for fusion sensors
