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Researchers Discover Natural 3D Counterpart to Graphene.
Xbitlabs ^ | 01/21/2014 11:50 PM | Anton Shilov

Posted on 01/23/2014 9:50:30 AM PST by Ernest_at_the_Beach

A collaboration of researchers at the U.S department of energy (DOE)’s Lawrence Berkeley national laboratory (Berkeley Lab) has discovered that sodium bismuthide can exist as a form of quantum matter called a three-dimensional topological Dirac semi-metal (3DTDS). This is the first experimental confirmation of 3D Dirac fermions in the interior or bulk of a material, a novel state that was only recently proposed by theorists.

(Excerpt) Read more at xbitlabs.com ...


TOPICS: Science
KEYWORDS: graphene; sodiumbismuthide; stringtheory

1 posted on 01/23/2014 9:50:30 AM PST by Ernest_at_the_Beach
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To: Ernest_at_the_Beach

one dimensional = nanotube (technically 3D, but still)
two dimensional = graphene
Three dimensional = ?


2 posted on 01/23/2014 9:53:02 AM PST by cuban leaf
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To: Ernest_at_the_Beach
Missed the first paragraph:

**********************************************

The discovery of what is essentially a 3D version of graphene – the 2D sheets of carbon through which electrons race at many times the speed at which they move through silicon – promises exciting new things to come for the high-tech industry, including much faster transistors and far more compact storage devices.

3 posted on 01/23/2014 9:57:10 AM PST by Ernest_at_the_Beach
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To: cuban leaf; ShadowAce; SunkenCiv; Marine_Uncle; neverdem

See just above.


4 posted on 01/23/2014 9:58:58 AM PST by Ernest_at_the_Beach
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To: Fred Nerks

ping


5 posted on 01/23/2014 9:59:44 AM PST by Ernest_at_the_Beach
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To: rdb3; Calvinist_Dark_Lord; Salo; JosephW; Only1choice____Freedom; amigatec; Still Thinking; ...

6 posted on 01/23/2014 10:03:04 AM PST by ShadowAce (Linux -- The Ultimate Windows Service Pack)
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To: ShadowAce; All
Thanks.

*********************************************

I should explain my absence for quite awhile.

Due to vision issues I suspended my typo filled comments, ...

Not been reading much either.

But now have reworked systems with Korora 20 and am a heavy user of the zoom accessibility feature. Please excuse any typos.

Might be around a bit more,.

7 posted on 01/23/2014 10:17:35 AM PST by Ernest_at_the_Beach
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To: Ernest_at_the_Beach

Imagine a marriage of graphene and 3D printing. I was reading about this just this week. Its already being worked on.


8 posted on 01/23/2014 10:39:54 AM PST by Starboard
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To: Starboard
This will keep a lot of researches busy for awhile!
9 posted on 01/23/2014 10:43:25 AM PST by Ernest_at_the_Beach
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To: Ernest_at_the_Beach
This is frustrating as supposed scientists plainly ignore a dimension for headline grabbing press. Graphene and nano tubes both have three dimensions. It doesn't matter that one dimension is small.
10 posted on 01/23/2014 10:43:44 AM PST by Durus (You can avoid reality, but you cannot avoid the consequences of avoiding reality. Ayn Rand)
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To: Durus

Yes, they are all three dimensional. But their construction/use is not. Nanotubes are essentially a rolled cylinder of graphene, but their electrical properties turn graphene’s 2-dimensional electrical properties into a single dimension (down the axis). The new materials this article describes maintain the same electromagnetic properties as a single sheet of graphene, but in a third dimension, allowing for much thicker materials, giving you much more volume. The issue with graphene is that when stacked, the special properties diminish and are no longer as useful.


11 posted on 01/23/2014 11:08:56 AM PST by Svartalfiar
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To: Ernest_at_the_Beach

Nice to see you back, I wondered where you got to!


12 posted on 01/23/2014 12:25:25 PM PST by Fred Nerks (fair dinkum)
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To: Svartalfiar
A sheet of graphene has three dimensions, and while it's thickness (or depth) is only a single atom it is still a thickness or depth. If we could develop a sheet of some material made of some sort of sub atomic particle that had only the thickness of said single subatomic particle it would still be have three dimensions. Describing graphene as a two dimensional material is not only incorrect it ignores the model of the physical universe in which all known matter exists.

Being able to have a material with the characteristics of graphene but can be thicker than graphene is exciting. It still doesn't make one of the dimensions of graphene not exist.

13 posted on 01/23/2014 12:38:40 PM PST by Durus (You can avoid reality, but you cannot avoid the consequences of avoiding reality. Ayn Rand)
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To: Durus

Yes, GRAPHENE physically has 3 dimensions.

The electrical USE of graphene has 2 dimensions.

No matter what you do, electrons only move within the graphene lattice in two directions. I’m not describing graphene as a 2-dimensional structure, I am describing its use in 2 dimensions, because electrons can’t move in that third dimension to do anything useful. When you start layering graphene in order to gain that third dimension electrically, you lose the special properties that make the single layer so useful electrically. Different orientations lose effectiveness at different rates, but you end up with pencil lead. Which, as we know, is not very conductive. (I’m not confusing you by calling it ‘lead’, am I?) But what makes sodium bismuthide so special is it has that third dimension (electrically) that maintains those special properties despite having multiple layers.

Imagine you have a pile of 2x2 flat-top lego blocks. You can place them on a base sheet, but you can’t stack them on top of each other. Yes, each lego block has 3 sides, but your constructed piece can only be built and added on to in 2 dimensions.


14 posted on 01/23/2014 12:59:56 PM PST by Svartalfiar
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To: Ernest_at_the_Beach
RE: "Might be around a bit more,. "
Well I would hope so Ernest.

This stuff continues to impress me as to possibilities for new generation semi-conductor and other, technologies.

15 posted on 01/23/2014 2:02:27 PM PST by Marine_Uncle (Galt level is not far away......)
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To: Ernest_at_the_Beach

You’re in my prayers Ernest...


16 posted on 01/23/2014 2:41:18 PM PST by GOPJ ("Remember who the real enemy is... ")
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To: ShadowAce

I’m still trying to figure out how to milk a bismuth.


17 posted on 01/23/2014 3:56:16 PM PST by NonValueAdded (It's not the penalty, it's the lack of coverage on 1 Jan. Think about it.)
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To: NonValueAdded
I’m still trying to figure out how to milk a bismuth.

Very carefully, or they will kick you in the head.

5.56mm

18 posted on 01/23/2014 3:58:27 PM PST by M Kehoe
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To: Ernest_at_the_Beach; 6SJ7; AdmSmith; AFPhys; Arkinsaw; allmost; aristotleman; autumnraine; ...
Thanks Ernest.


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19 posted on 01/23/2014 5:33:31 PM PST by SunkenCiv (;http://www.freerepublic.com/~mestamachine/)
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To: Ernest_at_the_Beach

With that sort of flexibility in terms our entire spacetime bubble could be said to be only two dimensional, or even one dimensional. Single atoms are three dimensional ... unless in a quantum super position.


20 posted on 01/23/2014 6:31:06 PM PST by MHGinTN (Being deceived can be cured.)
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To: Ernest_at_the_Beach
Haven't seen you for a while Ernest.

Glad to see you back.

21 posted on 01/23/2014 6:46:47 PM PST by Carry_Okie (Grovelnator Shwarzenkaiser: fasionable fascism one charade at a time.)
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To: Ernest_at_the_Beach

Much Love to you, sir.

I wish you the best.


22 posted on 01/23/2014 8:28:39 PM PST by HippyLoggerBiker (Always carry a flagon of whiskey in case of snakebite and furthermore always carry a small snake.)
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