Graphene: Reversible Method of Magnetic Doping Paves Way For Semiconductor Use 38
concertina226 writes: A team of physicists at University of California, Riverside have discovered how to induce magnetism in graphene in a way that still preserves the material's electronic properties, which paves the way for graphene to be used as a semiconductor.
The researchers grew a sheet of yttrium iron garnet using laser molecular beam epitaxy in a laboratory (abstract). Magnetic substances like iron are known to disrupt graphene's electrical conduction properties, but yttrium iron garnet works well as it is an electric insulator.
When a graphene sheet was placed on top of an atomically smooth sheet of yttrium iron garnet, the graphene borrowed the magnetic properties from the yttrium iron garnet and became magnetized without the need for doping.
The researchers grew a sheet of yttrium iron garnet using laser molecular beam epitaxy in a laboratory (abstract). Magnetic substances like iron are known to disrupt graphene's electrical conduction properties, but yttrium iron garnet works well as it is an electric insulator.
When a graphene sheet was placed on top of an atomically smooth sheet of yttrium iron garnet, the graphene borrowed the magnetic properties from the yttrium iron garnet and became magnetized without the need for doping.
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The debt will be forgiven.
without the need for doping (Score:2, Funny)
Graphene. Just say "no" to drugs?
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When a graphene sheet was placed on top of an atomically smooth sheet of yttrium iron garnet, the graphene borrowed the magnetic properties from the yttrium iron garnet and became magnetized without the need for doping.
I agree. I have had enough of hearing about all the doping scandals.
...and with two sheets built in, I won't have to hunt for paper!
The last thing I need is news that my writing instrument is high on who-knows-what.
I can't wait to buy a pencil that will stick to my fridge without having to glue a magnet to it.
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Because of some skinny sheet
Of Graphene!
Don't know why
Don't know why
Don't know why
Graphene!
When your job ain't no fun
Turn a zero to one
With Graphene!
Don't know why
Don't know why
Don't know why
Graphene!
Apologies to Eric Clapton...
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So Doctor Rockso (I DO GRAPHENE!)?
Damn.
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I can't wait to buy a pencil that will stick to my fridge without having to glue a magnet to it.
You gave me an idea for Magnetic Erasers
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As opposed to the first myomer bundle bicep. "The Schwarzenegger Bundle"
Confused Summary (Score:4, Informative)
Graphene might be used in semiconductor devices whether magnetized or not; being able to magnetize it opens possibilities of making some types of devices but in no way is a prerequisite for practical applications of graphene in computers, semiconductors, etc.
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Graphene IS doped in experiements, and interesting and useful properties have been found. look up "doped graphene" in google and see the cool stuff that comes up.
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Graphene loses it's sought after properties when doped. It becomes useless for the intended purpose. Silicon is better than doped graphene.
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Wrong, dopants have been found that give useful properties. google is your friend
Pathogenic + Magnetic + Biomarker (Score:1)
With all these attributes Graphene could maybe be applied to warfare as a payload. Once inhaled, some kind of detection scheme to track or detect the targets that were in the vicinity. Just put in a little graphene if you want to mark them for future surveillance, put in a shitload if you want them to inhale a bunch more...that would probably work faster than asbestos especially if it were possible to manipulate the structure to make particles ever more wickedly shaped. Like little shurikens or caltrops
Graphene still has a little problem (Score:5, Insightful)
Until we have a way to mass produce the stuff, all this research is fine and well but you won't be seeing it in products anytime soon. Not saying the research is pointless, just that people shouldn't get too excited about the applications just yet. There are some more fundamental issues that need to be resolved first.
wow. homemade graphene with microscopic features (Score:2)
That's pretty awesome.
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It think it's important to figure out how to use it before figuring out how to mass manufacture it - since they don't know the end result required by the manufacturing process until they figure out how to use it.
That sounds cheap (Score:2)
NOT!
But good luck with it. This is the kind of breakthrough that may one day lead to viable quantum computers, teleportation, and other things that are relegated to the SyFy channel for now.
Still ignoring the big issue with graphene. (Score:3)
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http://www.rsc.org/chemistrywo... [rsc.org]
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Hmm... I was just realizing that this DVD method should also allow for the printing of graphene-based circuits; instead of pitting the foil, the laser would be reducing paths in the disc (instead of the entire thing). I wonder how good the resolution would be using a method like this? Would it work with blu-ray and a blue laser, or would that break down the oxide too much? You should get better resolution that way, and if someone made a multi-layer disc with graphite oxide instead of reflective foil, you
ZZZZZZZ another graphite/graphene article... (Score:1)
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Cause he isn't an egghead.
Quite a contrast (Score:2)
Early laser development: a solution in search of applications
Early graphene development: A plethora of applications for a substance we still can't manufacture.
press release creep (Score:2)
and it becomes