Graphene’s New Rival

Molybdenum disulfide helps graphene transistors work better—and it makes good nanocircuits on its own, too

3 min read

Graphene has become the darling of the postsilicon crowd in the eight years since Andre Geim and Konstantin Novoselov isolated it by ripping Scotch tape off a chunk of graphite. But there are other two-dimensional nanowonders. Molybdenum disulfide (MoS2), which can be pulled off a block of molybdenite through the same process, could offer new approaches to making high-speed logic circuits—on its own or in combination with graphene.


“We spent the last seven, eight years looking at how to make transistors out of graphene,” Geim says. “But there was an elephant in the room—that you can’t really switch off current in graphene.”


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The State of the Transistor in 3 Charts

In 75 years, it’s become tiny, mighty, ubiquitous, and just plain weird

3 min read
A photo of 3 different transistors.
iStockphoto
LightGreen

The most obvious change in transistor technology in the last 75 years has been just how many we can make. Reducing the size of the device has been a titanic effort and a fantastically successful one, as these charts show. But size isn’t the only feature engineers have been improving.

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