Graphene

Talk about things that are not necessarily related to music or the guitar.
kirolak
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Graphene

Post by kirolak » Thu May 16, 2019 5:22 pm

I am fascinated by this & wish I were clever enough to understand how anything 1 atomic width in size can even be seen, let alone used for any purpose:

https://phys.org/news/2019-03-cambridge ... scale.html

Alan Carruth
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Re: Graphene

Post by Alan Carruth » Thu May 16, 2019 5:29 pm

It's a sheet that's one atom thick, but can (in theory) extend to any size in two dimensions. Basically, they make it by peeling off the surface layer of graphite, which is, of course, black.

doug
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Re: Graphene

Post by doug » Thu May 16, 2019 6:00 pm

I read about it about a year ago in a financial newsletter. It supposedly will revolutionize electronics, because it will be possible to have flexible circuits boards and chips. ....things like items of clothing that are also computerized, etc.
I can't even begin to imagine what our children will see???
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eno
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Re: Graphene

Post by eno » Thu May 16, 2019 6:19 pm

Alan Carruth wrote:
Thu May 16, 2019 5:29 pm
It's a sheet that's one atom thick, but can (in theory) extend to any size in two dimensions. Basically, they make it by peeling off the surface layer of graphite, which is, of course, black.
Another fascinating fact is how they discovered graphene. You would think they used million dollar equipment for that? No, just scotch tape:

Andre and Kostya frequently held 'Friday night experiments' - sessions where they would try out experimental science that wasn’t necessarily linked to their day jobs. One Friday, the two scientists removed some flakes from a lump of bulk graphite with sticky tape. They noticed some flakes were thinner than others. By separating the graphite fragments repeatedly, they managed to create flakes that were just one atom thick. Their experiment had led to graphene being isolated for the very first time.
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pogmoor
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Re: Graphene

Post by pogmoor » Thu May 16, 2019 8:43 pm

Alan Carruth wrote:
Thu May 16, 2019 5:29 pm
...they make it by peeling off the surface layer of graphite, which is, of course, black.
But a sheet of graphene is transparent.
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Marshall Dixon
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Re: Graphene

Post by Marshall Dixon » Thu May 16, 2019 10:07 pm

pogmoor wrote:
Thu May 16, 2019 8:43 pm
Alan Carruth wrote:
Thu May 16, 2019 5:29 pm
...they make it by peeling off the surface layer of graphite, which is, of course, black.
But a sheet of graphene is transparent.
But only to the naked eye. You can see it with special 4D rose colored goggles. :D

I think we need to take a step back and figure out how we're going to get rid of the stuff if we can't even see it.

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pogmoor
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Re: Graphene

Post by pogmoor » Thu May 16, 2019 11:23 pm

Marshall Dixon wrote:
Thu May 16, 2019 10:07 pm
I think we need to take a step back and figure out how we're going to get rid of the stuff if we can't even see it.
It should burn easily enough as it’s pure carbon :mrgreen:
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Alan Carruth
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Re: Graphene

Post by Alan Carruth » Fri May 17, 2019 4:05 pm

Sorry: I've only seen bulk graphite. I can understand how a sheet of graphene would be transparent at visible wavelengths, but it's got to show up under some sort of EM radiation. But what do I know; I'm just a guitar maker even if I do try to keep up with science stuff.

Marshall Dixon
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Re: Graphene

Post by Marshall Dixon » Fri May 17, 2019 5:34 pm

pogmoor wrote:
Thu May 16, 2019 11:23 pm
It should burn easily enough as it’s pure carbon :mrgreen:
Whew! I thought it would end up in the oceans and choke some whales to death. I can breathe easier now. :shock:

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Jorge Oliveira
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Re: Graphene

Post by Jorge Oliveira » Fri May 17, 2019 6:02 pm

There's a Cambridge University spin-out company, Paragraf, who is now able to produce graphene wafers with 20 cm in diameter ready for commercial use... :D
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Andrew Pohlman
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Re: Graphene

Post by Andrew Pohlman » Fri May 17, 2019 7:28 pm

So, how do you pick it up off of a table top, for example? A carbon atom is about 0.3 nm (nanometers) thick. So at 1 atom thick, a roll of 100 layers would be only 30 nm thick - still microscopic. 12" X 36" X 0.3 nm. Do we cut it with scissors? :D

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