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Comment: Re:How long until you can buy it? (Score 1) 170

by PhysSurfer (#31041526) Attached to: Graphene Transistors 10x Faster Than Silicon
Unfortunately there is a huge cost here in leakage. The big problem with graphene is that it has an intrinsic bandgap of zero, so that it can hardly switch. If you have access to the article you can see that the Ion/Ioff ratio is a measly three! These are more useful as amplifiers than transistors.

A big research goal right now is to engineer a gap in graphene, but no one has succeeded, unless you count carbon nanotubes, of course.

Comment: Re:2006 called... (Score 1) 60

by PhysSurfer (#30988562) Attached to: Breakthrough Grows Graphene On Silicon Substrate
Actually, a quantum hall effect has been observed in epitaxial graphene, and the resistance quantization is four orders of magnitude closer to the quantum h^2/e than in the exfoliated "scotch tape" graphene. You need to keep up on your Nature reading, sheesh!

The real problem is that the band gap is still zero. These things have an on/off ratio of the order of 10 or less, orders of magnitude worse than Si, the material they are supposed to supplement.

Space

Third Falcon 1 Launch May Be This Afternoon 76

Posted by CmdrTaco
from the this-would-be-easier-if-we-had-a-stargate dept.
ElonVonBraun writes "The web is abuzz with rumors that SpaceX will attempt its third rocket launch today. In the past two days, they have also done successful tests of their bigger, stronger rockets. When the launch does happen, sometime during this five-day window, there will be a webcast. Betting odds are that they will do it around 4PM PST."

Anyone can do any amount of work provided it isn't the work he is supposed to be doing at the moment. -- Robert Benchley

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