#World thinnest lightbulb developed using graphene A postdoctoral research scientist, Young Duck Kim, has led a team of scientists from Columbia, Seoul National University (SNU),
and Korea Research Institute of Standards and Science (KRISS) that have demonstrated for the first time ever an on-chip visible light source using graphene, an atomically thin and perfectly crystalline form of carbon,
They attached small strips of graphene to metal electrodes, suspended the strips above the substrate,
The study, right visible light emission from graphene is published in the Advance Online Publication on Nature Nanotechnology website on June 15. ee created
and graphene-based on-chip optical communications. Creating light in small structures on the surface of a chip is crucial for developing fully integrated hotoniccircuits that do with light
By measuring the spectrum of the light emitted from the graphene, the team was able to show that the graphene was reaching temperatures of above 2500 degrees Celsius,
hot enough to glow brightly. he visible light from atomically thin graphene is so intense that it is visible even to the naked eye,
without any additional magnification, explains Young Duck Kim, first and co-lead author on the paper and postdoctoral research scientist who works in Hone group at Columbia Engineering.
which the team discovered was due to interference between the light emitted directly from the graphene
and light reflecting off the silicon substrate and passing back through the graphene. Kim notes, his is only possible
because graphene is transparent, unlike any conventional filament, and allows us to tune the emission spectrum by changing the distance to the substrate.
The ability of graphene to achieve such high temperatures without melting the substrate or the metal electrodes is due to another interesting property:
graphene becomes a much poorer conductor of heat. This means that the high temperatures stay confined to a small ot spotin the center. t the highest temperatures,
the electron temperature is much higher than that of acoustic vibrational modes of the graphene lattice,
observes. hese unique thermal properties allow us to heat the suspended graphene up to half of temperature of the sun,
as compared to graphene on a solid substrate. The team also demonstrated the scalability of their technique by realizing large-scale of arrays of chemical-vapor-deposited (CVD) graphene light emitters.
Yun Daniel Park, professor in the department of physics and astronomy at Seoul National University and co-lead author,
#Reducing traffic congestion in India with suspended, driverless pods t an electric car, except you don drive it,
or small groups to drop them off at precisely their destination. t a self-driving car, except it doesn move on the general network of roadways,
or small groups to drop them off at precisely their destination. t a self-driving car, except it doesn move on the general network of roadways,
as well as capacitors with energy storage capacity that increases about tenfold when the fibers are stretched. Fibers and cables derived from the invention might one day be used as interconnects for super-elastic electronic circuits
#Scientists grow human mini-brains that are giving big insights into autism Scientists first grew mini-hearts in a lab. Then they 3d printed skin.
#Melt Electrospinning Writing, A New 3d printing Technique, Points Way to Human Tissue Repair (Technische Universitat Munchen) An international study points the way toward wider,
the researchers from the Technische Universität München investigated a new combination of 3d printed microfiber scaffolding and hydrogels.
A new 3d printing technique called melt electrospinning writing played a key role, simultaneously providing room for cell growth as well as the needed mechanical stiffness.
Itublished by Sandra Helselmay 19,2015 11:20 am (3d printing Industry)--The Electroloom team recently launched its Kickstarter campaign for
more effective use ofublished by Sandra Helselmay 18,2015 11:50 am (3d printing Industry)--Printrbot has unveiled its Printrbot Pro, a large-scale 3d printer and a
#3d printed Graphene Nanoflakes May Play Role in Regenerative medicine and Tissue Engineering (3d printing Industry) A research team at Northwestern University has begun printing three-dimensional structures with graphene nanoflakes.
The team, led by Ramille Shah, assistant professor of Materials science and engineering at the Mccormick School of engineering and Surgery at the Feinberg School of medicine, has developed a new kind of graphene ink that can be used to print large 3d structures.
Shah ink uses 60 to 70 percent graphene, preserving the integrity of the material, including its electrical conductivity.
The secret ingredient in Shah ink is a mix of biocompatible elastomer and fast-evaporating solvents.
This particular graphene-based ink is just one of 30 printable bio inks that Shah has formulated with her graduate team.
#Researchers Develop 3d printing Method to Produce Shell Capsules That Can Be loaded with Therapeutic Drugs Researchers at the University of Minnesota have introduced a novel 3d printing based method to produce highly monodisperse core/shell capsules that can
They expect that this platform of 3d printed programmable release capsules will be useful in applications such as dynamic tissue engineering, 3d printed drug delivery systems, synthetic/artificial tissues, programmable matter,
and triggered temporal release of the biomolecular payload. a
#Micron3dp Announces Breakthrough in 3d printing of Liquid, Hot Glass Israel Micron3dp has announced a breakthrough in glass 3d printing.
Micron3dp has succeeded in printing oftglass at a temperature of 850 degrees Celsius, as well as borosilicate glass at a melting temperature of 1640 degrees Celsius.
Eran Gal-Or, R&d manager of Micron3dp, explained, icron3dp made a successful 3d printing test, and although efforts have been made in the past by other companies to print with this medium,
this is the first time that glass has been printed in liquid hot form and Micron has accomplished it by means of its innovative way of 3d printing in an extremely hot extruder.
This new method once perfected, may open the door to a variety of new 3d printing applications within the art industry, medicine, aerospace, security, architecture, and more.
Micron3dp is reportedly seeking investors who are interested in helping them further the technology involved within these new processes w
#3d printing Technique Being developed for Bone Regeneration A team of scientists from the University of Nottingham has developed a new 3d bioprinting technique that allows them to 3d-print a thick paste filled with protein-releasing microspheres that can be used to greatly speed up bone regeneration
Smartphone-Based 3d printed Diagnostic Device for Viruses (3ders. org) A team of researchers from the California Nanosystems Institute at UCLA has created a low-cost,
smartphone-based device and app that is made with a 3d printer and can read enzyme-linked immunosorbant assay (ELISA) diagnostic plates on the spot, with up to 99.6 percent accuracy for certain viruses. With the UCLA researcher new invention,
a small and low-cost 3d printed device is attached to a smartphone and illuminates a 96-well plate with an LED array.
More exotic and much longer term techniques such as quantum computing are also being explored as discussed in Quantum computing takes a step closer.
It also performs correlation pattern matching used in Big data analysis such as DNA analysis and financial modeling.
This will allow datacenters to offer greater data rates and bandwidth for cloud computing and Big data applications.
#D-Wave Breaks 1000 Qubit Quantum computing Barrier Today D-Wave Systems announced that it has broken the 1000 qubit barrier,
According to D-Wave, this is a major technological and scientific achievement that will allow significantly more complex computational problems to be solved than was possible on any previous quantum computer.
D-Wave quantum computer runs a quantum annealing algorithm to find the lowest points, corresponding to optimal or near optimal solutions, in a virtual nergy landscape.
Every additional qubit doubles the search space of the processor. At 1000 qubits the new processor considers 21000 possibilities simultaneously,
a search space which dwarfs the 2512 possibilities available to the 512-qubit D-Wave Two. n fact,
the new search space contains far more possibilities than there are articles in the observable universe. As the only manufacturer of scalable quantum processors, D-Wave breaks new ground with every succeeding generation it develops.
The 1000-qubit milestone is the result of intensive research and development by D-Wave and reflects a triumph over a variety of design challenges aimed at enhancing performance
Beyond the much larger number of qubits, other significant innovations include: A 1000 qubit processor will also be on display at the upcoming GEOINT conference in D-Wave booth,#10076.
Sign up for our insidehpc Newsletter e
#Researchers Build Memcomputing Prototype Over at Scientific Advances, a newly published paper describes a high-efficiency architecture called memcomputing.
The SMT system uses machine learning, Big data and analytics to continuously analyze, learn from and improve solar forecasts derived from a large number of weather models.
most current forecasting techniques rely on individual weather models that offer a more narrow view of the variables that affect the availability of renewable energy.
IBM approach provides a general platform for renewable energy forecasting, including wind and hydro. It advances the state-of-the-art by using deep machine learning techniques to blend domain data,
That can increase the use of renewable energy sources as a more accepted energy generation option, said Dr. Bri-Mathias Hodge,
who oversees the Transmission and Grid Integration Group at the National Renewable energy Laboratory (NREL), a collaborator in the project.
exceeded only by natural gas 1. A USA Sunshot Vision Study suggests that solar power could provide as much as 14%of U s. electricity demand by 2030 and 27%by 2050 2. Currently,
there are two main customers for renewable energy forecasting technologies: utility companies and independent system operators (ISOS.
With solar power installations rapidly growing, future solar penetration levels will soon require increased attention to the value of more accurate solar forecasting.
The U s. Department of energy Sunshot Initiative is a collaborative national effort that aggressively drives innovation to make solar energy fully cost-competitive with traditional energy sources before the end of the decade.
Citing a soon to be released report from computer security company Kaspersky Lab the newspaper said the attack involved malicious software that gave hackers long-term access to banking systems.
#3 Japanese automakers to jointly work on self-driving car technology TOKYO Japan big three automakers will team up with electronics giants
and the government in a bid to propel the country into the front ranks of self-driving car technology,
Japanese and US automakers are aiming to commercialise self-driving cars by around 2020, with global behemoths including Daimler and Google in play.
#Toyota Nissan Honda to jointly support hydrogen station infrastructure development Toyota motor Corp Nissan motor co and Honda motor Co have agreed to work together to help accelerate the development of hydrogen station infrastructure for fuel cell vehicles (FCVS.
For hydrogen-fueled FCVS to gain popularity it is not only important that attractive products be launched-hydrogen station infrastructure must also be developed.
and operating hydrogen stations while FCVS are not common on the road. Following the formulation of its Strategic Road Map for Hydrogen
and Fuel cells in June 2014 the Japanese government has highlighted the importance of developing hydrogen station infrastructure as quickly as possible
not only supporting the installation of hydrogen stations by means of subsidies but has resolved also to introduce a range of additional policies aimed at promoting activities that generate new demand for FCVS including partially subsidizing the cost of operating hydrogen stations.
The three automobile manufacturers hope to both popularize FCVS and ensure that it will be easy to refuel them.
Consequently they have recognized jointly the need for automobile manufacturers to promote the development of hydrogen station infrastructure alongside the government
The three automobile manufacturers will give careful consideration to concrete initiatives such as underwriting a portion of the expenses involved in the operation of hydrogen stations.
The new chips could help meet demands of future cloud computing and Big data systems, cognitive computing, mobile products and other emerging technologies, according to IBM,
New 3d printers Could Build Implants Electronics Several new 3d printers showcased at CES 2015 in Las vegas earlier this month suggest that the 3d printing industry best known for churning out brightly colored plastic doodads could be turning over a new
Amid the rough-edged replicas of superheroes and army tanks that adorned the expo's 3d printing space stood a machine that prints tiny medical implants that dissolve inside the human body.
One company displayed a prototype of a 3d printed medical device that can automatically stitch up patients after surgery.
3d printing isn't just for makers anymore. Increasingly, this trendy technology is turning into a must-have tool for doctors, researchers and engineers, according to Nick Liverman, CEO and founder of Old world Labs (OWL), a Virginia-based company that designs dissolvable 3d printed implants.
The 10 Weirdest Things Created By 3d printing"Most 3d printers are made to print what's already out there a model version of the Eiffel Tower or a chess set.
But you would use our printer to build things that aren't developed yet: theories, research.
"Liverman told Live Science. 3d printed implants OWL's MC-1 and MC-2 printers were both on display at CES.
This technique sets OWL's printers apart from other 3d printers on the market, such as Makerbot's Replicator or the Ultimaker 2, that use a process known as fused deposition modeling (FDM), not SLA.
Other 3d printers on the market also use stereolithography to build what Liverman calls"high-resolution"objects.
"7 Cool Uses of 3d printing in Medicine During cartilage replacement surgery, the scaffold containing the stem cells would be implanted in the knee,
not just in the lab. Printable electronics OWL wasn't the only progressive 3d printing company hawking its wears at CES.
The company's 3d printers have two extruders one that prints in conventional plastic filaments and another that squirts out highly conductive ink."
"There's a trend to try to get 3d printing to create more useful things, "Oliver told Live Science."
and closer to the idea that anything can be 3d printed. 3
#Four Tech Breakthroughs at the Cutting edge of Light During these dark winter months, spare a thought for artificial lights.
in agriculture, more effective harvesting of solar energy and its conversion into heat via greenhouses could enable year-round production as well as access to crops not currently available in certain climates.
and sell fuel cell vehicles, and to parts suppliers and companies interested in building and operating fueling stations,
and supply a network of 12 hydrogen stations for New york, New jersey, Massachusetts, Connecticut and Rhode island d
using a system produced by Ekso Bionics, of Richmond, California. More than 3, 500 patients with either spinal cord or stroke injuries have walked more than 15 million steps with the device,
Ekso Bionics has been working on its project for more than a decade, he said. The first version required 2,
For example, a wearable device called Stonecrysus, which will be available in February 2015, says it can calculate people's metabolic rate based on measures like their heart and respiration rates.
and analysis behind the scenes of any wearable device that collects the data. The idea is to get a comprehensive model of human physiology from just a few measurements,
"The scientists said their pop-up assembly technique has many advantages over 3d printers, which create 3d structures by depositing layers of material on top of one another.
Although 3d printers are increasingly popular, they work slowly. In addition, it is difficult for 3d printers to build objects using more than one material,
and it is nearly impossible for these printers to produce semiconductors or single crystalline metals,
Still, Rogers emphasized the team's new strategy is complementary to 3d printing, and is not an attempt to replace that technique.
paving the way for new types of unmanned vehicles that could one day carry people. Earlier this spring, NASA ENGINEERS flew the so-called GL-10 (the"GL"stands for"Greased Lightning")prototype drone at a military base located about two hours away from the agency's Langley Research center In virginia.
and earlier this month, the prototype was displayed at the Association for Unmanned vehicles Systems International's 2015 conference, in Atlanta.
#World's Thinnest Light bulb Created from Graphene Graphene, a form of carbon famous for being stronger than steel
Researchers have developed a light-emitting graphene transistor that works in the same way as the filament in a light bulb."
This new graphene device, however, is so efficient and tiny, the resulting technology could offer new ways to make displays or study high-temperature phenomena at small scales,
In the new study, the scientists used strips of graphene a few microns across and from 6. 5 to 14 microns in length, each spanning a trench of silicon like a bridge.
An electrode was attached to the ends of each graphene strip. Just like tungsten, run a current through graphene
and the material will light up. But there is an added twist, as graphene conducts heat less efficiently as temperature increases,
which means the heat stays in a spot in the center, rather than being distributed relatively evenly as in a tungsten filament.
"The temperature of hot electrons at the center of the graphene is about 3, 000 K 4, 940 F,
while the graphene lattice temperature is still about 2, 000 K 3, 140 F, "he said."
"It results in a hotspot at the center and the light emission region is focused at the center of the graphene,
"It's also the reason the electrodes at either end of the graphene don't melt.
As for why this is the first time light has been made from graphene, study co-leader Yun Daniel Park,
a professor of physics at Seoul National University, noted that graphene is embedded usually in or in contact with a substrate."
"Physically suspending graphene essentially eliminates pathways in which heat can escape, "Park said.""If the graphene is on a substrate,
much of the heat will be dissipated to the substrate. Before us, other groups had reported only inefficient radiation emission in the infrared from graphene."
"The light emitted from the graphene also reflected off the silicon that each piece was suspended in front of.
The reflected light interferes with the emitted light, producing a pattern of emission with peaks at different wavelengths.
The principle of the graphene is said simple, Park, but it took a long time to discover."
The MIT report stated that power-over-Wi-fi could be the enabling technology that finally brings the'Internet of things'to life e
#Flexible devices are a step closer For wearable technology a truly flexible electronic device is the goal.
Do it is made of organic bioelectronics and is able to convert chemical signals to electric potentials that travel along the device
From the study abstract in journal Biosensors and Bioelectronics: Study in Biosensors and Bioelectronics: An organic electronic biomimetic neuron enables auto-regulated neuromodulationource:
Karolinska Institutet u
#To Be prescribed Soon: Implantable Drug Releasing Microchips Over the past few years wee covered Microchips Biotech, an MIT spin out company that developed an implantable technology to release drugs inside the body in a controlled manner.
but 3d printers typically use heat to melt layers together, which means that incorporating cells during the printing process is nearly impossible.
Connecticut recently announced that it would offer $450, 000 in subsidies for two hydrogen stations in that state,
#Wind turbines Without Blades It no longer surprising to encounter 100-foot pinwheels spinning in the breeze as you drive down the highway.
A Spanish company called Vortex Bladeless is proposing a radical new way to generate wind energy that will once again upend
data center servers and the specialized computers that direct autonomous cars and drones with collision detection. Eventually, the technology could reach home computers
Data centers that require faster connections between computers also could implement the technology soon, he says.
#Charting quantum signatures of electronic transport in graphene Over the last seven years, Javier Sanchez-Yamagishi has built several hundred nanoscale stacked graphene systems to study their electronic properties."
"What interests me a lot is that the properties of this combined system depend sensitively on the relative alignment between them,
He assembles sandwiches of graphene and boron nitride with various horizontal orientations.""The tricks we would use were making cleaner devices,
Sanchez-Yamagishi was a lead co-author of a 2014 paper in Nature("Tunable symmetry breaking and helical edge transport in a graphene quantum spin Hall state)
"which showed that having a component of the applied magnetic field in the graphene plane forced electrons at the edge of graphene to move in opposite directions based on their spins.
"We were trying to realize some interesting quantum states in the graphene. It's called a Quantum Spin Hall State,
That would have applications in quantum computing, an area of interest to the group because Jarillo-Herrero is a researcher in the NSF-funded Center for Integrated Quantum Materials.
and collaborators demonstrated that a certain alignment of layered graphene and hexagonal boron nitride created a unique bandgap in graphene,
which could be a precursor to developing the material for functional transistors. Sanchez-Yamagishi's co-authors again included Young
Hofstadter butterfly Graphene and boron nitride layers each have arranged atoms in a hexagonal, or six-sided, pattern.
When the lattice arrangement of graphene and hexagonal boron nitride layers are aligned closely, and the samples are exposed to a large out-of-plane magnetic field,
In addition to the Hofstadter butterfly result, the same devices were also the first to show a bandgap in graphene.
"What was unexpected very was showed we that graphene, which usually conducts very well, under the conditions of that experiment with a very low angle of rotation between the graphene
and the HBN, became an insulator. It didn't conduct at all. That was a behavior
"Fortunate discovery The peculiar electronic behavior of graphene comes from its molecular structure, which is like a honeycomb or chicken-wire-shaped lattice of carbon atoms.
the graphene has to be aligned very closely to hexagonal boron nitride. When it's closely aligned,
when layers of graphene just one to few atoms thick are separated from the graphite.""Graphene conducts electricity better than graphite.
It conducts better than silver or gold, "Sanchez-Yamagishi says. Sanchez-Yamagishi built a machine in the lab that stacks extremely thin layers of graphene and similar materials.
When two layers of graphene are misaligned, they are called twisted bilayer graphene.""In graphite, normally all the layers are aligned with each other;
electrons get slowed down, "he explains. It turns out that if two layers of graphene are stacked in alignment,
electrons traveling within a layer are slowed down in the same way. But with graphene, if the layers stacked on top of each other are misaligned,
they act as if one layer doesn't really feel the other layer.""You can put it right on top of each other,
they actually remain decoupled from each other, and it can still conduct electricity basically as well as if it was still a single sheet of graphene,
"he says.""If they are misaligned, then the electron in one layer does not get affected by the other layers and zips along quickly."
Sanchez-Yamagishi, 28, says he has grown from initially spending months to make good quality graphene to now making very intricate graphene devices and combining then with other materials.
Gold contacts send current through the graphene to measure its electrical properties. Often, graphene shapes used in test devices are shaped irregularly
since that is how they come off the natural graphite material. The graphite is rubbed on a sheet of silicon
and lifted off with special tape to create thin layers of graphene. Maximizing the amount of graphene that can be used for a device takes priority over making it look nice
Sanchez-Yamagishi says.""We're trying to push the technology to the highest level, so we're kind of relying on the tail end of the distribution here.
including those that are made with graphene electrodes.""It's amazing to be able to design a molecular circuit,
#Graphene gets bright: World's thinnest lightbulb developed Led by Young Duck Kim, a postdoctoral research scientist in James Hone's group at Columbia Engineering, a team of scientists from Columbia, Seoul National University (SNU),
and Korea Research Institute of Standards and Science (KRISS) reported today that they have demonstrated-for the first time-an on-chip visible light source using graphene, an atomically thin and perfectly crystalline form of carbon,
They attached small strips of graphene to metal electrodes, suspended the strips above the substrate,
right Visible light Emission from Graphene, is published in the Advance Online Publication (AOP) on Nature Nanotechnology's website on June 15."
and graphene-based on-chip optical communications.""Creating light in small structures on the surface of a chip is crucial for developing fully integrated'photonic'circuits that do with light
By measuring the spectrum of the light emitted from the graphene, the team was able to show that the graphene was reaching temperatures of above 2500 degrees Celsius,
hot enough to glow brightly. he visible light from atomically thin graphene is so intense that it is visible even to the naked eye,
without any additional magnification, explains Kim, first and co-lead author on the paper. Interestingly, the spectrum of the emitted light showed peaks at specific wavelengths,
which the team discovered was due to interference between the light emitted directly from the graphene
and light reflecting off the silicon substrate and passing back through the graphene. Kim notes
because graphene is transparent, unlike any conventional filament, and allows us to tune the emission spectrum by changing the distance to the substrate. he ability of graphene to achieve such high temperatures without melting the substrate
or the metal electrodes is due to another interesting property: as it heats up, graphene becomes a much poorer conductor of heat.
This means that the high temperatures stay confined to a small ot spotin the center. t the highest temperatures,
the electron temperature is much higher than that of acoustic vibrational modes of the graphene lattice,
observes. hese unique thermal properties allow us to heat the suspended graphene up to half of the temperature of the sun,
as compared to graphene on a solid substrate. he team also demonstrated the scalability of their technique by realizing large-scale of arrays of chemical-vapor-deposited (CVD) graphene light emitters.
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