Tiny transistor uses a single electron to turn off and on at room temperature.
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References
Geim A. K. & Novoselov K. S. Nature Mater., 6. 183 - 191 (2007).
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Sanderson, K. Graphene steps up to silicon's challenge. Nature (2007). https://doi.org/10.1038/news070226-10
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DOI: https://doi.org/10.1038/news070226-10