Scientists In China Predict Pentagonal Graphene 42
TechkNighT_1337 writes: Chinese scientists made calculations and predict that a new 2D allotrope of carbon based in a pentagonal form resembling a common pavement in the streets of Cairo can be synthesized. They call this new form penta-graphene. From the announcement in the Chemistry World, they say: "The team found that not only should a pentagon-containing version of graphene be fairly stable, it should also be stronger than conventional graphene and be able to withstand higher temperatures, up to 730C. It would also be a natural semiconductor, unlike conventional graphene, which is a highly efficient conductor and has to be chemically modified to turn it into a semiconductor."
So.. (Score:4, Insightful)
Where's my space elevator!?
Re:So.. (Score:4, Interesting)
Hexagonal Graphene (Score:5, Funny)
Let me be the first to predict Hexagonal Graphene.
While I'm at it, I'd like to also predict the following:
A sequel to 50 Shades
Future tension in the middle east
Hershey's coming out with a white chocolate syrup
Taco Bell being the only survivor of the restaurant wars
Facebook to soon cause an uproar due to a perceived privacy violation
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Let me be the first to predict Hexagonal Graphene.
Actually typical graphene is already a hexagonal lattice...
However, you might put your money on a square lattice (aka quadrille) or perhaps triangular lattice or the others listed here [wikipedia.org]...
But instead of a boring quadrile or pentagonal tiling, let me be the first to predict a Penrose tiling... Now that would be cool ;^)
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Wow, the joke train just blew through slew Station without even slowing down.
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Taco Bell being the only survivor of the restaurant wars
I think you mean pizza hut [imdb.com]...
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Re:Hexagonal Graphene (Score:4, Interesting)
You know they changed it right because Pizza Hut paid them a pile of cash? Anyone who goes along with the change to Pizza Hut from Taco Bell is an asshole. It doesn't even make sense because some scenes still show the Taco Bell logo.
Your theory doesn't take in to consideration Pizza Hut and Taco Bell are part of the same company (was PepsiCo at the time of filming now Yum! Brands) and Pizza Hut and Taco Bell even have co-located in some stores (although there are other combinations like KFC/PizzaHut and KFC/TacoBell).
The commonly accepted rationale is that Taco Bell is mainly just a US brand and since PepsiCCo paid for the product placement originally, they wanted to substitute one of their well known international brands for the international release of the movie to get more advertising mileage out of the placement...
But PepsiCo probably had to pay for the change, and of course they did a crappy job of executing the change...
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and anyone who cares that much about corporate branding exercises is a fucking moron.
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It's simply that in Europe we don't know what Taco Bell is at all, more so when the film was released - since then I read about Taco Bell in slashdot comments and such. Same with "Doritos", "Mountain Dew" and such : I never ate or drank or even saw one of these.
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Higher temperature?!?!?! (Score:2)
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"Hexagonal" graphene can sustain temperatures in excess of 2000C
Do you mean "withstand"? Otherwise that could solve a lot of problems...
Re:Higher temperature?!?!?! (Score:5, Interesting)
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Only if there is no oxygen around. Otherwise it simply burns in relatively low temperatures.
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730C for this pentagonal graphene seems much lower, which also suggests a much lower stability.
You can see that from the molecular diagram. Look at the way carbon-carbon bonds form in molecules, and what this does to the geometry of the molecule. By themselves, the bonds would 'spread out' until evenly separated in angle. In the pentagonal arrangement, the angles between bonds are not distributed evenly, which means that there is more energy stored in the bond than there is for the normal 'spread' of carbon-carbon bonds, lowering the energy that would be required to break the bonds. This is reflected
Do some bloody editing, editors (Score:5, Insightful)
based in a pentagonal form
"Based on" would be better, but still wouldn't be right. Molecule shapes aren't really "based on" anything, they just look like things sometimes.
resembling an common pavement
"An/a" aside, what's a "common pavement"?
in the streets of Ccairo
That's the c-capital of Egypt, right?
Where is Ccairo? (Score:3)
I have never heard of that place.
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It's right next to Carcosa.
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I predict (Score:3)
A graphene technology writing instrument
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It might if you add a built-in deletion module
Next in News (Score:3)
Arrange the atoms into an F3dm cubic space group.. (Score:2)
And you have the most powerful aphrodisiac known for women.
predicted carbon chemistry is now news? (Score:1)
I know graphene is all the rage in pop-sci news, but calculation/theoretical chemistry is not real until someone makes it. Im not sure how this stuff gets cherry picked to be newsworthy.
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Actually, I'm wondering... (Score:1)
...who China stole this idea from. I mean, seriously, given the amount of hacking they've been doing against government & scientific institutions here in the U.S., it may be more plausible that they are simply taking credit for other people's work.
New Unobtanium ? (Score:3)
It would be great if we could actually get enough graphene of any sort for industrial apps
Pander to My Prejudices (Score:1)
Re:Pander to My Prejudices (Score:4, Insightful)
Actually, the inclusion of a pentagonal allotropic unit inside a carbon nanotube (just rolled up graphene) was one of the first laboratory examples of a pure carbon semiconductor.
WAAAAY back in 1997
http://pubs.acs.org/doi/abs/10... [acs.org]
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