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   Non-TechGraphene


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To: DanD who wrote (319)1/29/2017 1:42:02 PM
From: DinoNavarre
4 Recommendations   of 423
 
This sounds to good to be true.....???

Mass Producing Graphene

Previously, it was thought too expensive to manufacture graphene. Now, physicists from Kansas State University may have found a way to mass produce graphene cheaply, and all it takes are three easy steps and uses only three simple materials: hydrocarbon gas, oxygen, and a spark plug.

The method, which lead inventor Chris Sorensen had already applied and received a patent for, uses a contained detonation of carbon-containing materials. Basically, you put oxygen and acetylene or ethylene gas in a chamber, where the contained detonation using a spark plug is supposed to occur. After detonation, graphene is formed and the process is simple, low-cost, and could easily be scaled up for industrial use.

“We have discovered a viable process to make graphene,” Sorensen said. “Our process has many positive properties, from the economic feasibility, the possibility for large-scale production and the lack of nasty chemicals. What might be the best property of all is that the energy required to make a gram of graphene through our process is much less than other processes because all it takes is a single spark.”

Aside from this, Sorensen’s method produces graphene by bulk, so to speak. “The real charm of our experiment is that we can produce graphene in the quantity of grams rather than milligrams,” researcher Arjun Nepal said.

The method was discovered accidentally.....

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To: DinoNavarre who wrote (328)1/29/2017 2:09:28 PM
From: DanD
1 Recommendation   of 423
 
We need to recruit someone with the scientific knowledge to the board to answer these questions .

But explosions creating Graphene does have a certain appeal. :)

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To: DinoNavarre who wrote (328)1/29/2017 3:06:09 PM
From: DanD
3 Recommendations   of 423
 
I went and looked at the patent. patft.uspto.gov

It seems simple even for me to understand. The cylinder isn't that big and produces 7.4 grams of Graphene. And the document says it can be scaled up to produce 300 grams an hour. So you could have a factory of nothing more complicated than an internal combustion cylinder with thousands of these things running producing graphene tonnes of graphene a day very cheap.

So if the data is correct. It does sound pretty great.

The investment question is who will take the risk of building that factory betting on this being best method?

Definitely worth following.

Dan D.

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To: DanD who wrote (330)1/29/2017 4:19:50 PM
From: A.J. Mullen
2 Recommendations   of 423
 
Some of the uses of graphene depend on the possibility that it can occur as a single molecule in the form of a sheet just one atom deep. It's possible to cover the same area with many molecules that are much smaller. The molecules will overlap so the thickness will be greater in places, and non-uniform. There are other methods for making this lesser form of graphene, which is sold for less than the mono-molecular sheets. This new method might be make it cheaper still.

Ashley

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From: DanD1/29/2017 4:39:59 PM
3 Recommendations   of 423
 
MIT comes up with a latticed Graphene structure utilizes the stronger than steel potential. 5% the weight, with 10x the strength.


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To: DanD who wrote (330)1/30/2017 9:27:48 AM
From: DinoNavarre
   of 423
 
>>>The investment question is who will take the risk of building that factory betting on this being best method?<<<

Maybe Elon Musk has some extra coffee money that he can throw into this process~!!!

Maybe the Chinese will run with it?

If the process can be tweaked to get the quality/quantity & repeatability desired, then I would guess that it would attract seed money?

I wonder how low quality the graphene being produced is and how costly it will be to upgrade it?

Not sure whether to file this one under "If it sounds to good to be true....then it probably is" or "Accidents happen"......

==================================================

Now the research team — including Justin Wright, doctoral student in physics, Camp Hill, Pennsylvania — is working to improve the quality of the graphene and scale the laboratory process to an industrial level. They are upgrading some of the equipment to make it easier to get graphene from the chamber in seconds — rather than minutes — after the detonation. Accessing the graphene more quickly could improve the quality of the material, Sorensen said.

patent detonation

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From: DinoNavarre2/3/2017 5:16:53 PM
4 Recommendations   of 423
 
Just a tiny bit more tweaking to do........

CSIRO develops electronics-grade graphene from soybeans Graphene production for use in electronic devices has become more commercially viable thanks to a breakthrough from a team of scientists at the CSIRO.

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To: DinoNavarre who wrote (334)2/14/2017 7:06:33 PM
From: DanD
   of 423
 
This is getting exciting.

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From: vitalremains2/21/2017 2:45:31 PM
3 Recommendations   of 423
 
First use of graphene to detect cancer cells
December 19, 2016, by Bill Burton
news.uic.edu

What can’t graphene do? You can scratch “detect cancer” off of that list.

By interfacing brain cells onto graphene, UIC researchers have shown they can differentiate a single hyperactive cancerous cell from a normal cell, pointing the way to developing a simple, noninvasive tool for early cancer diagnosis.

“This graphene system is able to detect the level of activity of an interfaced cell,” said Vikas Berry, associate professor and head of chemical engineering, who led the research along with Ankit Mehta, assistant professor of clinical neurosurgery in the UIC College of Medicine.

“Graphene is the thinnest known material and is very sensitive to whatever happens on its surface,” Berry said. The nanomaterial is composed of a single layer of carbon atoms linked in a hexagonal chicken-wire pattern, and all the atoms share a cloud of electrons moving freely about the surface.

“The cell’s interface with graphene rearranges the charge distribution in graphene, which modifies the energy of atomic vibration as detected by Raman spectroscopy,” Berry said, referring to a powerful workhorse technique that is routinely used to study graphene.

The atomic vibration energy in graphene’s crystal lattice differs depending on whether it’s in contact with a cancer cell or a normal cell, Berry said, because the cancer cell’s hyperactivity leads to a higher negative charge on its surface and the release of more protons.

“The electric field around the cell pushes away electrons in graphene’s electron cloud,” he said, which changes the vibration energy of the carbon atoms. The change in vibration energy can be pinpointed by Raman mapping with a resolution of 300 nanometers, he said, allowing characterization of the activity of a single cell.

The study, reported in the journal ACS Applied Materials & Interfaces, looked at cultured human brain cells, comparing normal astrocytes to their cancerous counterpart, the highly malignant brain tumor glioblastoma multiforme. The technique is being studied in a mouse model of cancer, with results that are “very promising,” Berry said. Experiments with patient biopsies would be further down the road.

“Once a patient has brain tumor surgery, we could use this technique to see if the tumor relapses,” Berry said. “For this, we would need a cell sample we could interface with graphene and look to see if cancer cells are still present.”

The same technique may also work to differentiate between other types of cells or the activity of cells.

“We may be able to use it with bacteria to quickly see if the strain is Gram-positive or Gram-negative,” Berry said. “We may be able to use it to detect sickle cells.”

Last year, Berry and other coworkers introduced nanoscale ripples in graphene, causing it to conduct differently in perpendicular directions, useful for electronics. They wrinkled the graphene by draping it over a string of rod-shaped bacteria, then vacuum-shrinking the germs.

“We took the earlier work and sort of flipped it over,” Berry said. “Instead of laying graphene on cells, we laid cells on graphene and studied graphene’s atomic vibrations.”

Co-authors on the study are Bijentimala Keisham and Phong Nguyen of UIC chemical engineering and Arron Cole of UIC neurosurgery.

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From: DanD2/25/2017 12:07:07 PM
2 Recommendations   of 423
 
Another production method:

Hi-Tech Machine Enables new Graphene Purification Technique

A revolutionary machine that can unboil an egg is being used to develop graphene purification technology.

Researchers from Flinders University in South Australia along with Western Australian company First Graphite Ltd will use the dynamic Vortex Fluidic Device (VFD) to produce high-quality graphene for industrial use.

grapheneentrepreneur.com

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