It looks like you're using an Ad Blocker.
Please white-list or disable AboveTopSecret.com in your ad-blocking tool.
Some features of ATS will be disabled while you continue to use an ad-blocker.
Scientists at the National University of Singapore (NUS) , DSO National Laboratories and University of Cambridge have jointly announced a new world record in broadband non-linear optical absorption behavior using single-sheet graphene dispersions in a variety of heavy-atom solvents and film matrices.
It has been predicted that graphene nanoplatelets can be produced at $5 per pound. If such costs could be achieved it will provide major disruption in the nanocomposites marketplace.
Although 3,000 related research papers and over 400 patent applications related to the technology were filed in 2010, mass commercialization of graphene may still be years away due to a number of product and process obstacles.
1) cost of development, which will likely decrease as process innovations reduce variability in production and as throughput rises.
2) technological complication that pertains to the high electrical conductivity of the material. Scientists must identify a way to contain the charge in graphene sheets so that digital signals can be processed properly.
3) Difficulties relating to the health and safety of nanotechnology in general, though graphene retains some safety advantages over its close cousin, carbon nanotubes.
Dr Narayan Hosmane from Northern Illinois University will tell us how he almost by accident produced high-yields of graphene instead of the expected single-wall carbon nanotubes by using the Dry-Ice Method. Synthetic methodologies for producing graphene on large quantities will be the topic of his presentation.
SAN RAFAEL — Dominican University in San Rafael has joined forces with a Marin company producing graphene from carbon dioxide, allowing students to conduct research commonly reserved for large universities and bolstering the company’s efforts to refine manufacturing of the promising material.
The partnership with the company, Graphene Technologies, represents an increasing trend among universities, enhancing the real-world experience of students without adding expenses like hiring additional instructors, said Dr. Sibdas Ghosh, chair of the department of Natural Science and Mathematics at Dominican.
“Other universities will see this as a viable model,” Dr. Ghosh, chair since 2001, said. “They (Graphene Technologies) have the technology — we have the space and the students.”
For Graphene Technologies, which moved much of its analysis and processing of the material to Dominican in June, the help of intern researchers has already resulted in discoveries that have significantly improved the manufacturing process. The goal, said company CEO and co-founder Jon Myers, is to be able to produce one ton of the material per year by the end of 2012.
The hexagonal lattice has the longest "mean free path" of any known material — of the order of microns. This is the distance an electron can travel freely without bumping into anything, or having its path disrupted by scattering; the things that induce resistance. When the mean free path is longer than the dimensions of the material, you get ballistic transport. In graphene, the mean free path is of the order of 65 microns — long enough that electronic components could be made that would operate at ambient temperatures with virtually no resistance. This is similar to superconductivity, but at room temperature.
4, 5 & 6. Best at electricity And in case that doesn't impress you, Manchester University's Dr Leonid Ponomarenko points out that graphene also has "the highest current density (a million times that of copper) at room temperature; the highest intrinsic mobility (100 times more than in silicon); and conducts electricity in the limit of no electrons". Which means it can carry more electricity more efficiency, faster and with more precision than any other material.
Determined to play a key role in solving global dependency on fossil fuels, Javad Rafiee, a doctoral student in the Department of Mechanical, Aerospace, and Nuclear Engineering at Rensselaer Polytechnic Institute, has developed a new method for storing hydrogen at room temperature.
Rafiee has created a novel form of engineered graphene that exhibits hydrogen storing capacity far exceeding any other known material. For this innovation, which brings the world a step closer to realizing the widespread adoption of clean, abundant hydrogen as a fuel for transportation vehicles, Rafiee is the winner of the 2010 $30,000 Lemelson-MIT Rensselaer Student Prize. He is among the four 2010 $30,000 Lemelson-MIT Collegiate Student Prize winners announced today.