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New Graphene Research Promises Reliable Chip-Level Production
An anonymous reader writes "A research team from the University of Texas and a German nanotechnology company have published a paper which describes a major milestone for the future of graphene-based computing – the reliable production of wafer-scale graphene measuring between 100 and 300mm, suitable at last for integration with 'traditional' materials in computing. The research team was able to manufacture 25,000 graphene field-effect transistors from lab-produced graphene film on a polycrystalline copper base. Team research leader Deji Akinwande said: 'Our process is based on the scalable concept of growing graphene on copper-coated silicon substrates...Once we had developed a suitable method for growing high-quality graphene with negligible numbers of defects in small sample sizes, it was relatively straightforward for us to scale up.'"(Original, paywalled paper is at ACS Nano.)
I wonder if this will help me 3D print a drone? I was originally going to use Raspberry Pi, but might use a graphene based product instead. I would like to start a delivery service which accepts bitcoin as payment for Apple products.
The non-paywalled article includes some hilarious zingers like "the material also has extraordinary semiconductive properties which could revolutionise the issue of cooling in data centres."
If by "extraodinary" you mean: No bandgap unless you are really doctoring the graphene with other materials, then sure since "ordinary" semiconductors have bandgaps.
Not sure how transistors that can't be turned off will help in cooling data centers, but who knows what revolutions lurk in future press releases!
AntiFA: An abbreviation for Anti First Amendment.
Or anywhere on a website?
read reddit? its like a ton of junk . /. is much less junk i say !! we should knight /. . From now on u will be called Sir /.
I dont think they were button mushrooms in the soup
handy, you 4Re free
Disclaimer: IANAP/C
Abstract from paper published ACS Nano:
Somayyeh Rahimi , Li Tao , Sk. Fahad Chowdhury , Saungeun Park , Alex Jouvray , Simon Buttress , Nalin Rupesinghe , Ken Teo , and Deji Akinwande *
Department of Electrical and Computer Engineering, The University of Texas at Austin, Austin, Texas 78758, United States
Aixtron Ltd., Anderson Road, Swavesey, Cambridge, CB24 4EQ, U.K.
The largest applications of high-performance graphene will likely be realized when combined with ubiquitous Si very large scale integrated (VLSI) technology, affording a new portfolio of “back end of the line” devices including graphene radio frequency transistors, heat and transparent conductors, interconnects, mechanical actuators, sensors, and optical devices. To this end, we investigate the scalable growth of polycrystalline graphene through chemical vapor deposition (CVD) and its integration with Si VLSI technology. The large-area Raman mapping on CVD polycrystalline graphene on 150 and 300 mm wafers reveals >95% monolayer uniformity with negligible defects. About 26000 graphene field-effect transistors were realized, and statistical evaluation indicates a device yield of 74% is achieved, 20% higher than previous reports. About 18% of devices show mobility of >3000 cm2/(V s), more than 3 times higher than prior results obtained over the same range from CVD polycrystalline graphene. The peak mobility observed here is 40% higher than the peak mobility values reported for single-crystalline graphene, a major advancement for polycrystalline graphene that can be readily manufactured. Intrinsic graphene features such as soft current saturation and three-region output characteristics at high field have also been observed on wafer-scale CVD graphene on which frequency doubler and amplifiers are demonstrated as well. Our growth and transport results on scalable CVD graphene have enabled 300 mm synthesis instrumentation that is now commercially available.
... this research WAS done by Africans, wasn't it?
What's that you say?
ANTHROPOLOGY
FACT #21: The name Homo sapien was first used by the 18th Century Swedish botanist Carolus Linnaeus. The word "sapien" means "wise." The name was originally used to speak of the White man and synonymous with "europaeus." As a result, many later taxonomists and geneticists believed that Negroes and other races should be classified as different species. In fact, Darwin declared in The Descent of Man that the varieties of mankind are so distinct that similar differences found in any other animal would warrant their classification in different species, if not different genera. (39)
FACT #22: For his mammoth work, The Origin of Races, Professor Carleton Coon, President of the American Association of Physical Anthropologists and the premier geneticist of the world, assembled massive evidence from geography, anatomy, genetics, physiology, comparative dentition, linguistics, archeology, and fossil records from 300 bone-bearing sites to verify his theory of pre-sapien racianation." In other words, Homo erectus was divided by race even before evolution into Homo sapien stage. (12)
FACT #23: According to Dr. Coon, while the Caucasoid subspecies (the White race) was evolving in Europe, the Negro race was standing still on the evolutionary plane and is today no less than 200,000 years behind the European in skull and brain development. (9)
FACT #24: The Negro skull, in addition to having a smaller brain volume and thicker cranial bones than that of the White, is prognathous; i.e., the lower face projects forward, rather in the manner of an animal's muzzle. In consequence, the Negro jaw is substantially longer, relative to its width, than the White jaw. A feature of the Negro lower jaw is its retention of a vestige of the "simian shelf," a bony region immediately behind the incisors. The simian shelf is a distinguishing characteristic of apes, and it is absent in Whites. (9) (12) (39)
FACT #25: The skin of the Negro is thicker and possibly superior to the White's in the way it impedes the penetration of germs and in its protection from the ultraviolet rays of the sun. (39) (14)
FACT #26: The dark color of the Negro is due to melanin pigment which is spread through every layer of the skin and is found even in the muscles and brain. (9) (27)
FACT #27: An African dentist can tell a Negro's tooth from a white man's at a glance. (14)
FACT #28: Negroes have arms which are longer, relative to body height, than those of Whites. This feature, together with their much thicker cranial bones, gives Black athletes an advantage over Whites in boxing. The skeletal and muscular peculiarities of Negroes' lower limbs have given them considerable success as sprinters, but have left them relative undistinguished as distance runners. (39) (27)
ADDITIONAL DIFFERENCES
The hair is black, crispy, and "woolly" in texture, it is flat and elliptical with no central canal or duct like the hair of Europeans.
The nose is thick, broad and flat, often turned up nostrils exposing the red inner lining of the mucous membrane similar to an ape.
The arms and legs of the Negro are relatively longer than the European. The humerus is a trifle shorter and the forearm longer thereby approximating the simian form.
The eyes are prominent, iris black and the orbits large. The eye often has a yellowish sclerotic coat over it like that of a gorilla.
The Negro has a shorter trunk; the cross-section of the chest is more circular than whites. The pelvis is narrower and longer as it is in an ape.
The mouth is wide with very thick, large and protruding lips.
Negro skin has a thick superficial horny layer which resists scratching and impedes the penetration of germs.
The Negro has a larger and shorter neck akin to that of anthropoids.
The cranial sutures are more simple than in the white type and close together earlier.
The ears are roundish, rather small, standing somewhat high and detached thus approac
Every time I hear about graphite, graphene, bucky balls, nanotubes, and all these other carbon buzzwords, they keep saying "soon soon soon"... Well, what I want to know is when this stuff will leave the research labs and be of any practical use to anyone. Either shit or get off the pot already.
Buck Feta. You know what to do.
Finally, some hope for the 10 GHz Pentium 4 we have been waiting so keenly!
I am not sold on wafer-scale until they make it web-scale