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New Form of "Mobius" Carbon Predicted
KentuckyFC writes "We've seen carbon nanotubes, buckyballs, and chickenwire. Now materials scientists have created a computer model of a Mobius strip fashioned from strips of graphene — a molecule that would have a single surface and only one edge. (Other groups have made Mobius-like organic molecules but never out of carbon sheets.) The model allows the researchers to determine the physical and chemical properties of the molecules and how these depend on the number of twists in the strip. The team says, for example, that 'Mobius carbon' should be stable to temperatures of at least 500 Kelvin (abstract). But the most exciting prediction is that strips with an odd number of half twists should have a dipole moment that would cause them to self-organize into a crystal. That implies that there's a new type of carbon made entirely of Mobius strips ready to be made by any chemists with a good supply of graphene (maybe these guys)."
I wrote the first post on the Moebius strip I wrote the first post on the Moebius strip
V'Ger will comply, if the carbon units give the information
Do these have useful properties at all? Where's the (wild and unfounded) speculation?
paper: http://arxiv.org/abs/0903.2080
After logging in slashdot still does not take you back to the page you were on. It's been that way for 20 years.
A Mobius strip is bad for your back.
I think I'll just stick with the Pole strip for now thanks.
RUGBYRUGBYRUGBY
Can you imagine a Klien Bottle made of these?
I am wondering the chemistry applications of this. I bet you can make some very interesting compounds out of this material. A one sided molecule kind of redefines limiting agent would it not? - StupidPeopleTrick
Now they just need to perfect it for water.
Will this do anything for bicycle frames?
When they can produce a Klein Bottle I will be impressed. Still not sure either will be be useful, but I will be impressed.
We link the mobius loops with each other and use an electric field to manipulate the dipole moment ---
Variable Sword !
My first thought would be that:
Carbon Crystal = Diamond
So handmade custom 'Mobius Diamonds' could be the new rage
My second though was that
Carbon Nanotube Crystal != Diamond
Diamonds are carbon crystals at the atomic level, where is sounds these crystals would be at the molecular level (molecules being bonded groups of atoms)
So they probably would not share all the characteristics of diamonds. I'd be interested to see what they look like though.
IANAChemist, so I'm curious to hear from someone more qualified than I about what a nanotube crystal could be like.
What, are you calling my high school journalism teacher a liar?
Graphene has some pretty interesting electronic properties. Its bandgap (the essential component of all semiconductors)
Graphene is a semimetal. The bandgap is zero in suspended graphene. Epitaxial graphene on SiC has a small gap (0.1meV) but below Fermi level, so not very useful.
can be manipulated by changing the length of the sheet; as the sheet becomes infinitely long, the bandgap approaches zero.
Not correct. The bandgap of a narrow ribbon depends on the width (not the length) of the ribbon. Above 10nm there is no gap, below there is, regardless how long it is.
As a result, it could hold potential in photovoltaics for light capture or LEDs for light emission where capture/emission is tunable based on the size of the particle (which is pretty easy to manipulate).
Well, this is totally unrelated as electron-hole pair recombination requires a junction.
Another article popped up on Slashdot recently suggesting graphene could be used for super high-capacity memory storage: http://hardware.slashdot.org/article.pl?sid=08%2F12%2F18%2F2332251.
From the paper they mention that active electrons have near-zero effective mass. Since electron mobility is inversely proportional to effective mass, resistivity approaches zero (in essence, we approach superconductivity).
No. mobility is finite, because you need to take into account of the so called saturation velocity. Besides, near-zero doesn't mean zero, so conceptually the two are completely different.
Will these Mobius strips have ants on them? ;)
Ant(Dude) @ Quality Foraged Links (AQFL.net) & The Ant Farm (antfarm.ma.cx / antfarm.home.dhs.org).
You might be the right person to ask this. I commute on a fairly good mountain bike. My biggest maintenance issue is with the rear gear shift. The nine speed system is must harder to keep calibrated than my old seven speed bikes. It really is a PITA.
The hydraulic disc brakes OTH are absolutely fantastic. Easily 10 times easier to maintain than cable actuated caliper brakes.
So I would love to see a hydraulic gear shift. Do you know if anybody is working on that? It would be fantastic.
http://michaelsmith.id.au
As they only have one side would these be able to be used to create monopoles?
Oh wow, that's stable within a handful of degrees of boiling water.
I'm very curious what it may be good for, but that little factoid makes it sound and feel like buzzword useless hype.
Article seems a little ... one-sided.
I'll get my coat.
Ydco co
One property of a mobius ring is that if the ribbon is cut along its length, it falls apart into two interlocked loops, each new ring passing through the hole in the middle of the other (two rings simply linked together).
If the original band that gets twisted and joined into a mobius ring had a weak "seam" down its middle, perhaps other chemical/physical means could then split it along that seam. Like perhaps an enzyme solution working on a protein seam "doped" into the middle of the graphene strips alongside the seam. That process might be a lot cheaper/easier than some other process that directly forms linked loops of graphene rings.
Perhaps a wide band could be split many times into a highly interlocked set of rings. Perhaps just pairs of rings could have interesting properties in a material of many of them. Perhaps there's more advanced topological methods that can split a mobius ring into a very long series of linked rings.
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make install -not war
i got my girlfriend to shave her pubes into a Mobius Strip
Utilizing the synergization of benchmark e-solutions to pre-workaround action items!
Can the same technology be used to create politicians?