Graphene memory.

Texan prof sees big future for graphene storage • The Register

Tour’s system works using strips of graphite ten atoms thick, which can be mechanically broken by a pulse of electricity, then joined up again by another pulse, and so on.

These on-off elements can be 10 nanometres in size, as opposed to the 45nm typical in today’s flash chips. Better still, the graphite strips require only two terminals to work rather than three, which means that chips can have many layers much more easily. As the process is mechanical, the device would retain information without using any power.

Something that lasts essentially forever would be nice, as would densities of (conservatively) a few terabits per square centimeter.

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