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/sci/ - Science & Math


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File: 116 KB, 614x612, wavy-graphene..jpg [View same] [iqdb] [saucenao] [google] [report]
1745769 No.1745769 [Reply] [Original] [archived.moe]

Graphene, oh graphene, what will you be up to next?

>> No.1745798
File: 137 KB, 600x707, nnano.2010.132-f2.jpg [View same] [iqdb] [saucenao] [google] [report]
1745798
Quoted by: >>1745848

http://www.nature.com/nnano/journal/v5/n8/full/nnano.2010.132.html

The koreans will be mass producing it shortly. It's coming to your touchscreens soon...

>> No.1745802
Quoted by: >>1745840

Zero bandgap transistors.

>> No.1745805
Quoted by: >>1745868

Chalk one up for the gay bar.

>> No.1745840

>>1745802


>zero bandgap

>zero bandgap = metal

>band gap is required for SS transistor.

>band gap is the fundamental material property that makes semiconductors useful.


you know nothing about SS device properties, SS physics, or graphene


also graphene is a metallic conductor.


the most interesting thing about graphene is that electrons (n type excitons) have zero effective mass

>> No.1745848

>>1745798

the fuck am i looking at

>> No.1745856

Is the half integer quantum hall effect of graphene useful for electronics?

>> No.1745857

also graphene's major application is as a transparent, flexible anode/cathode material to replace InSnO (ITO, indium tin oxide)


highly ordered graphite (which are made of highly crystalline phases of ordered graphene planes) have been used in electrochemistry for decades.

>> No.1745862
File: 99 KB, 392x300, 789_CoolFace.jpg [View same] [iqdb] [saucenao] [google] [report]
1745862

>>1745840
>the most interesting thing about graphene is that electrons (n type excitons) have zero effective mass
Hey, I know that! It was on the Big Bang Theory.

>> No.1745868
Quoted by: >>1745870

>>1745805
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>> No.1745870

>>1745868
http://www.youtube.com/watch?v=7gLTfGDlEFU
http://www.youtube.com/watch?v=7gLTfGDlEFU
http://www.youtube.com/watch?v=7gLTfGDlEFU
http://www.youtube.com/watch?v=7gLTfGDlEFU
http://www.youtube.com/watch?v=7gLTfGDlEFU
http://www.youtube.com/watch?v=7gLTfGDlEFU
http://www.youtube.com/watch?v=7gLTfGDlEFU
http://www.youtube.com/watch?v=7gLTfGDlEFU

>> No.1745875
Quoted by: >>1745929

It revolutionizes batteries, processors and other critical components of prebiotic technology. Exciting time to be alive if you're a gadget lover.

>> No.1745929
Quoted by: >>1745977

>>1745875

>batteries.

think you mean capacitors. carbon nanostructured ultracapacitors have been in application use for over 5 years. they used them in a variety of Formula 1 cars to store charge recovered from a KERS (kinetic energy recovery system) developing 90 hp for ~1-2 seconds

>processors

again, the major issues associated with graphene application to electronic devices is that graphene is not a simple semiconductor. it thus cannot be used to simply "replace" doped silicon, germanium or any other intrinsic semiconductor.

for 50 years people have been developing the physics of the devices we commonly use in microelectronics.

the problem is that the physics of these devices DEPEND on "normal" semiconductor properties to function.

you can make FET with graphene, but you could never replace doped silicon in a MOSFET architecture with any form of graphene.

until significant amounts of PRIVATE MONEY (like billions of dollars) is invested in this technology, do not expect to see it in your Intel chips

>critical components of prebiotic technology

I wont even comment on "prebiotic" but yes. again the main EXPECTED application is as a replacement for ITO.

indium is in short supply. it is already heavily controlled by various large countries.

China has completely stopped all exports of raw indiu in order to protect its own electronics industry.


look it up on google

"indium shortage"

a replacement for ITO for use in LCD and OLED screens is needed to help fuel the industry.

>> No.1745977
Quoted by: >>1745997

>>1745929
Ah, for semiconductors, perhaps CVD grown single crystal diamonds will be the next big thing.

>> No.1745997
Quoted by: >>1746080

>>1745977


CVD is not a good way to make single crystals. obviously PVD is impossible with carbon, but still...


also CVD is super expensive, much moreso than high temp and pressure in an arc furnace.


besides, you need ultra high pressure to make tetrahedral carbon.

you cant have ultra high pressure deposition processes.

>> No.1746080
Quoted by: >>1746848

>>1745997
You haven't seen what they could do nowadays.

http://www.wired.com/wired/archive/11.09/diamond_pr.html

Read the part about Apollo diamond. They can produce single crystal diamonds using microwave generated plasma using methane and hydrogen. And it is a low pressure process. They are researching on using differentially doping of boron for transistors, I believe. DeBeer's subsidiary element 6 is also into this. They also have single crystal diamonds for sale.

>> No.1746816

>>1745840
IT'S IN NATURE, BITCH
http://www.nature.com/nnano/journal/v3/n11/full/nnano.2008.268.html

>> No.1746843

>>1745840
So you said it's a metallic conductor, and yet you disagree that it has zero bandgap. HOWEVER, graphene transistors are already well-known.

Bitch, you best shut yo' fool mouth.

>> No.1746848
Quoted by: >>1748105

>>1746080
>DeBeer's subsidiary element 6 is also into this.

of course they are. they have to make damn sure they get the patent on as much synthetic diamond shit as possible, because they could literally be bankrupt by a single enterprising company with a solid patent on cheap diamonds. because the general public isn't going to believe that "natural" diamonds are somehow superior forever.

>> No.1748105

>>1746848
Never said I was surprised. Interestingly, while DeBeer's monopoly has been broken, prices do not seem to plunge as the other sellers know it is in their self interest to keep the prices high.

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