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Graphene Could Make Nonvolatile Molecular Memory

European researchers build graphene-based switches

3 min read

18 August 2008—Researchers have discovered a new way to switch current on and off in graphene, pointing the way to the possibility of molecule-size memory.

Graphene is a 1-atom-thick carbon molecule in which electrons flow 100 times as fast as they do in silicon. In theory, a graphene transistor would be 100 times as fast as the same device made of silicon. One challenge, though, is that graphene is so conductive that it’s hard to stop current from flowing, and such on-off switching is necessary for any sort of transistor.

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The Transistor at 75

The past, present, and future of the modern world’s most important invention

2 min read
A photo of a birthday cake with 75 written on it.
Lisa Sheehan

Seventy-five years is a long time. It’s so long that most of us don’t remember a time before the transistor, and long enough for many engineers to have devoted entire careers to its use and development. In honor of this most important of technological achievements, this issue’s package of articles explores the transistor’s historical journey and potential future.

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