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Keyword: graphene

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  • Breakthrough for electric cars: Supercapacitors from miracle substance charges batteries in minutes

    07/23/2015 9:23:04 PM PDT · by 2ndDivisionVet · 37 replies
    International Business Times ^ | May 25, 2015 | Peter Carty
    The problem of limited range has been an important factor curbing the wide-spread adoption of electric cars. But scientists in South Korea have developed a new technology which could solve the problem. The lithium-ion batteries used in most of the current generation of electric cars have limitations. They are expensive and store insufficient power for the needs of many drivers, requiring frequent top-ups. And when they have to be recharged the charging process is time consuming. The technological breakthrough could solve these problems. And in the process, Dr Lu Wu of the Gwangju Institute of Science and Technology in South...
  • [Improved] Graphene Used to Make Efficient Cooling for Electronics

    07/11/2015 10:40:25 AM PDT · by BenLurkin · 2 replies
    viralglobalnews.com ^ | July 11, 2015
    A few years ago, researchers from Chalmers University of Technology demonstrated that graphene could be used to cool silicon-based electronics. “But the methods that have been in place so far have presented the researchers with problems,” explained professor Johan Liu of Chalmers University of Tech. “It has become evident that those methods cannot be used to rid electronic devices off great amounts of heat [sic], because they have consisted only of a few layers of thermal conductive atoms.” According to Liu and colleagues, adding additional layers of graphene to the surface leads to less adhesion. The researchers have overcome this...
  • China claims to have the world’s first material for light-propelled spaceflight (Graphene)

    06/30/2015 8:50:21 PM PDT · by 2ndDivisionVet · 18 replies
    China Daily Mail ^ | June 30, 2015
    The following is based on a translation of a report in Chinese media: According to xinhuanet.com’s report on June 19, through 3 years of research, Prof. Chen Yongsheng of the College of Chemistry and Prof. Tian Jianguo of the Institute of Physics, Nankai University have obtained a special graphene material for light-driven flight. Due to the special electronic characteristic of graphene and the macrostructure and form of the material, the material is able to get driving force from light 1,000 times greater than ordinary light pressure. The website’s reporter claimed to have seen with his own eyes a graphene sponge...
  • Single atom thick graphene 'light bulb' demonstrated by scientists (Short Video)

    06/20/2015 9:31:29 AM PDT · by Ernest_at_the_Beach · 23 replies
    hexus.net ^ | 18 June 2015, 15:36 | Mark Tyson
    Scientists have collaborated to create "what is essentially the world's thinnest light bulb". The development is yet another based upon the pure carbon wonder-material called graphene. Researchers passed current though atom-thin, flexible, transparent strips of graphene which reached temperatures over 2500°C, producing bright light visible to the naked eye.
  • Hemp nanosheets could be better than graphene for making the ideal supercapacitor

    06/17/2015 2:21:57 AM PDT · by 2ndDivisionVet · 21 replies
    As hemp makes a comeback in the U.S. after a decades-long ban on its cultivation, scientists are reporting that fibers from the plant can pack as much energy and power as graphene, long-touted as the model material for supercapacitors, according to David Mitlin, Ph.D. Supercapacitors are energy storage devices that have huge potential to transform the way future electronics are powered. Unlike today’s rechargeable batteries, which sip up energy over several hours, supercapacitors can charge and discharge within seconds. But they normally can’t store nearly as much energy as batteries, an important property known as energy density. One approach researchers...
  • Researchers demonstrate method that reduces friction between two surfaces to almost zero...

    05/15/2015 1:36:22 PM PDT · by Red Badger · 23 replies
    05-15-2015 | Bob Yirka
    A team of researchers working at Argonne National Laboratory, in Illinois, has found a way to dramatically reduce friction between two macroscopic scale surfaces—to near zero. In their paper published in the journal Science, the team describes how they accidently discovered the method and why they believe it might be useful for real world applications. As most people are aware, friction causes energy loss and wear and tear on mechanical parts—lubricants such as oil are used to help reduce friction and to dissipate heat, but scientists would really like to find a way to prevent it from happening in the...
  • Spiders Ingest Nanotubes, Then Weave Silk Reinforced with Carbon

    05/07/2015 2:27:54 PM PDT · by Citizen Zed · 43 replies
    Spiders sprayed with water containing carbon nanotubes and graphene flakes have produced the toughest fibers ever measured, say materials scientists. Spider silk is one of the more extraordinary materials known to science. The protein fiber, spun by spiders to make webs, is stronger than almost anything that humans can make. The dragline silk spiders use to make a web’s outer rim and spokes is amazing stuff. It matches high-grade alloy steel for tensile strength but is about a sixth as dense. It is also highly ductile, sometimes capable of stretching to five times its length. This combination of strength and...
  • Spiders sprayed with carbon nanotubes spin superstrong webs

    05/06/2015 8:29:15 AM PDT · by Red Badger · 12 replies
    Phys.Org ^ | 05-06-2015 | by Bob Yirka
    A team of researchers working in Italy has found that simply spraying a spider with a carbon nanotube solution can cause the spider to spin stronger webs. In their paper they have uploaded to the preprint server arXiv, the team describes their experiments with both graphene and nanotube solutions and what happened when they sprayed it on ordinary spiders. As the researchers note, while silk production using silkworms has been quite successful, doing the same to harvest silk from spiders has not, (because of their territorial traits, the complex nature of the silk they make and their cannibalistic tendencies) which...
  • Graphene 3D Lab Announces Water-Soluble 3D Printer Filament

    05/01/2015 3:06:18 PM PDT · by 2ndDivisionVet · 15 replies
    TenLinks ^ | April 29, 2015
    NEW YORK, NY, Apr 29, 2015 – Graphene 3D Lab Inc. will announce details of a newly-developed water-soluble 3D filament at the Canadian Manufacturers & Exporters’ (CME) Canada Makes: Additive Manufacturing Forum at Mohawk College in Hamilton, Ontario on April 30, 2015. The water-soluble filament is the latest in a line of specialty-functional filaments that Graphene 3D is introducing to the 3D printing industry. Elena Polyakova, chief operating officer of Graphene 3D, will present details on the new water-soluble filament and discuss the effect of graphene-enhanced materials for the 3D printing industry. Water-soluble filaments are primarily used to occupy negative...
  • ORNL-led team demonstrates desalination with nanoporous graphene membrane

    03/25/2015 6:59:31 PM PDT · by ckilmer · 25 replies
    ornl.gov ^ | 2015 | Dawn Levy
    News   Home  |  ORNL  |  News  |  News Releases  |  2015 SHARE   Media Contact: Dawn LevyCommunications865.576.6448   ORNL-led team demonstrates desalination with nanoporous graphene membrane    Researchers created nanopores in graphene (red, and enlarged in the circle to highlight its honeycomb structure) that are stabilized with silicon atoms (yellow) and showed their porous membrane could desalinate seawater. Orange represents a non-graphene residual polymer. Image credit: Oak Ridge National Laboratory, US Dept. of Energy (hi-res image) OAK RIDGE, Tenn., March 25, 2015—Less than 1 percent of Earth’s water is drinkable. Removing salt and other minerals from our biggest available source of water—seawater—may help satisfy a growing...
  • This Scientist Invented a Simple Way to Mass-Produce Graphene

    03/21/2015 8:25:38 PM PDT · by 2ndDivisionVet · 14 replies
    Popular Mechanics ^ | March 20, 2015 | John Wenz
    Caltech's David Boyd has done what scientists have been struggling to do for years: He says he's figured out a cheap, easy way to make graphene, and to make a lot of it. The kicker? He's using technology from the 1960s. Cooking up graphene Graphene was a wonder material first theorized in 1947 and not actually proven in the real world until years later, when scientists did it in the strangest of ways in 2003: by rubbing a pencil across some Scotch tape. Made of sheets of carbon just one atom thick, the stuff is tough, durable, and conductible. It's...
  • Magnetized graphene could 'change the course of human civilization'

    03/10/2015 11:57:26 PM PDT · by 2ndDivisionVet · 29 replies
    EDN Network ^ | March 10, 2015 | Amy Norcross
    Graphene, a material formed of a mesh of hexagonal carbon atoms, has, according to ExtremeTech author Ryan Whitwam, “many fantastic properties that could change the course of human civilization. It’s chemically stable, highly conductive, and incredibly strong.” In a recent New Yorker article, John Colapinto stated graphene “may be the most remarkable substance ever discovered.” One thing graphene is not, however, is magnetic. Researchers at the University of California, Riverside have developed a way to induce magnetism in graphene while preserving its electronic properties. The research team did this by bringing a single sheet of graphene into close proximity to...
  • Buckybomb shows potential power of nanoscale explosives

    03/06/2015 3:35:05 PM PST · by LibWhacker · 41 replies
    PhysOrg ^ | 3/5/15 | Lisa Zyga
    Buckybomb shows potential power of nanoscale explosives Mar 05, 2015 by Lisa Zyga Enlarge Molecular configuration of an exploding buckybomb. Credit: ACS (Phys.org)—Scientists have simulated the explosion of a modified buckminsterfullerene molecule (C60), better known as a buckyball, and shown that the reaction produces a tremendous increase in temperature and pressure within a fraction of a second. The nanoscale explosive, which the scientists nickname a "buckybomb," belongs to the emerging field of high-energy nanomaterials that could have a variety of military and industrial applications. The researchers, Vitaly V. Chaban, Eudes Eterno Fileti, and Oleg V. Prezhdo at the University of...
  • Tech Developed to Make Graphene Batteries 10x Smaller, Same Strength

    02/22/2015 3:23:13 PM PST · by 2ndDivisionVet · 9 replies
    BusinessKorea ^ | February 2, 2015 | Jung Suk-yee
    A Korean research team has successfully developed a technology to make a sponge-like electrode material using graphene and a polymer, leading to a graphene battery. The newly-developed battery is ten times as small as existing ones, but can show the same product performance. A research team headed by Park Ho-seok, professor of the School of Chemical Engineering at Sungkyunkwan University, announced on Feb. 1 that it has succeeded in developing a very porous graphene aerogel electrode material by combining polyvinyl alcohol and graphene. Studies on developing high-capacity and rapidly-chargeable batteries are underway worldwide. It is necessary to compress devices in...
  • ICL Researchers Figure out How to 3D Print Pure Graphene

    02/18/2015 6:04:28 PM PST · by 2ndDivisionVet · 23 replies
    3D Printing ^ | February 13, 2015 | Brian Krassenstein
    We’ve seen an incredible amount of research hours and dollars being poured into an area where the ‘miracle material’ graphene converges with what some may call a ‘miracle technology’ in 3D printing. In this space, a whole slew of groundbreaking applications and processes may emerge as a better understanding of graphene, and how to 3D print it come about. We’ve discussed a company called Graphene 3D Lab in the past. They have been producing a graphene nanocomposite filament for typical FDM/FFF 3d printers. The problem with this filament, however, is the fact that most of the desirable properties of graphene,...
  • Researchers 3 Years Away from Commercializing Pure Graphene 3D Printers

    12/24/2014 8:36:43 PM PST · by 2ndDivisionVet · 8 replies
    3D Print ^ | December 24, 2014 | Heidi Milkert
    As we’ve mentioned so many times in past articles, the convergence of additive manufacturing and the ‘miracle material’ graphene could have major ramifications for dozens of industries over the next several years. Because of this, researchers and companies are spending a great deal of time and money figuring out the best methods to 3D print graphene. A group of researchers, led by Seol Seung-kwon at the Korea Electrotechnology Research Institute’s Nano Hybrid Technology Research Center (KERI) are at the forefront of this research. As we mentioned last month, KERI, a unit under the Ministry of Finance in South Korea, recently...
  • Graphene-based Fuel Cell Membrane Could Extract Hydrogen Directly from Air

    12/11/2014 3:24:14 PM PST · by 2ndDivisionVet · 44 replies
    IEEE Spectrum ^ | December 2, 2014 | Dexter Johnson
    In research out of the University of Manchester in the UK led by Nobel Laureate Andre Geim, it has been shown that the one-atom-thick materials graphene and hexagonal boron nitride (hBN), once thought to be impermeable, allow protons to pass through them. The result, the Manchester researchers believe, will be more efficient fuel cells and the simplification of the heretofore difficult process of separating hydrogen gas for use as fuel in fuel cells. This latest development alters the understanding of one of the key properties of graphene: that it is impermeable to all gases and liquids. Even an atom as...
  • Energy Storage of the Future: Researchers Find Promising Properties in Lightest Materials

    11/07/2014 10:01:27 AM PST · by 2ndDivisionVet · 3 replies
    Virtual-Strategy Magazine ^ | October 20, 2014
    Researchers at Lawrence Livermore National Laboratory recently found that properties of graphene aerogel could be used to enhance energy storage for electric vehicles and other high-power energy storage applications. The research will appear as the cover article in the Nov. 14 issue of the Journal of Materials Chemistry A. Personal electronics such as cell phones and laptops could get a boost from some of the lightest materials in the world. Lawrence Livermore researchers have turned to graphene aerogel for enhanced electrical energy storage that eventually could be used to smooth out power fluctuations in the energy grid. The team found...
  • IBM to invest $3 billion in chip development over next 5 years (Graphene R & D ??)

    07/14/2014 10:34:48 AM PDT · by Ernest_at_the_Beach · 16 replies
    hexus.net ^ | 10 July 2014, 10:07 | by Mark Tyson
    IBM has provided an outline of its plans to invest $3 billion over the next five years. It hopes the cash injected into its R&D activities will help it find ways to make chips even smaller and more efficient and research into practical alternative materials which will prove superior to silicon.Big Blue has observed the diminishing returns in the process reduction of silicon chips over recent years and has now decided it needs to bet big on the task of finding a suitable successor. Tom Rosamilia, Senior Vice President of IBM Systems & Technology Group said "We really do see...
  • Why You, Non-Nerd, Should Get Excited about Graphene

    05/31/2014 1:27:07 AM PDT · by kingattax · 18 replies
    Yahoo ^ | May 30, 2014 | Joshua Fruhlinger
    Let’s talk about the coolest substance ever: graphene. It’s one atom thick, (about one-millionth the thickness of a single strand of hair), it’s 100 times stronger than steel, and it conducts electricity like nothing else. It’s a supermaterial that is quietly changing the course of technology. Here’s why you should get excited about it: It will turn computers into transformers It is now being suggested that graphene can be changed into different configurations on the fly by simply manipulating it with lasers. That means that it could take on the form of different computers in just seconds, freeing us from...
  • Physicists Discover How to Change the Crystal Structure of Graphene

    05/01/2014 9:41:15 PM PDT · by neverdem · 11 replies
    SciTech Daily ^ | May 1, 2014 | NA
    Graphene trilayers can be stacked in two different configurations, which can occur naturally in the same flake. They are separated by a sharp boundary. (Image: Pablo San-Jose ICMM-CSI) A team of researchers has discovered how to change the crystal structure of graphene, a finding that could lead to smaller and faster microprocessors.A University of Arizona-led team of physicists has discovered how to change the crystal structure of graphene, more commonly known as pencil lead, with an electric field, an important step toward the possible use of graphene in microprocessors that would be smaller and faster than current, silicon-based technology.Graphene consists...
  • Graphene made in a kitchen blender

    04/23/2014 1:53:19 PM PDT · by neverdem · 16 replies
    Chemistry World ^ | 22 April 2014 | Tim Wogan
    Shear mixing could be used to produce graphene flakes in bulk © CRANN Suspensions of high quality graphene can be produced quickly and cheaply using a common industrial mixer, researchers in Ireland have discovered.1 The scientists even managed to produce small amounts of graphene using a kitchen blender.While next generation electronic devices need ultra-pure, monolayer graphene produced by mechanical exfoliation or chemical vapour deposition, everyday electronics such as batteries and solar cells are produced using solution coating. Therefore, to use graphene in these kinds of electronics engineers require huge amounts of high quality graphene flakes suspended in solution.In 2008, Jonathan...
  • Five wonder materials that could change the world

    04/16/2014 1:54:31 AM PDT · by blueplum · 10 replies
    The Guardian ^ | April 15, 2014 | Ian Sample
    Materials such as graphene and shrilk are so new that the scientists who discovered them hardly know what to do with them – they only know they might yet transform our lives :snip: Last week, Zhaohui Zhong at the University of Michigan described how graphene might be used to make night-vision contact lenses. "Graphene has huge potential," says Andrea Ferrari, director of the Cambridge Graphene Centre. "You don't usually find a material that has applications in so many different areas." :snip: What to call a material made from leftover shrimp shells and proteins derived from silk? Javier Fernandez and Don...
  • Samsung claims a ‘Massive’ Graphene Wafer breakthrough – Begins Prototype production of gFETs ....

    04/07/2014 11:23:16 AM PDT · by Ernest_at_the_Beach · 56 replies
    wccftech.com ^ | 12:16 PM - 6 Apr 2014 | Syed Muhammad Usman Pirzada
    Graphene is slated as the major breakthrough of this century. Infact it could very well propel the semiconductor a couple of decades easily (compared to the performance trend via Moore’s law ). Graphene transistors are more than capable of being clocked at 500Ghz so you get the idea of what Samsung is claiming to have achieved: a replicateable production process of Graphene nodes.Graphene.Experimental gFET Graphene Production – Scientific breakthrough of this century to be used in CPUs* of wearable devicesOK, I admit, I was being slightly sarcastic when I wrote the headline. It seems sort of ironic that if Samsung’s...
  • Samsung researchers claim graphene breakthrough

    04/05/2014 6:51:29 PM PDT · by Vince Ferrer · 30 replies
    The Telegraph ^ | 4/4/2014 | Sophie Curtis
    Samsung researchers have developed a new method of synthesising graphene, which they claim could accelerate the commercialisation of the so-called 'miracle material', for use in electronic devices. Graphene is one of the thinnest, lightest, strongest and most conductive materials know to man, consisting of a single layer of carbon atoms arranged in a honeycomb structure. Its versatility means that it can potentially support a wide variety of applications in electronics, including flexible displays, wearables and other next-generation electronic devices.
  • Understanding How Graphene can become Superconducting

    03/21/2014 6:56:04 PM PDT · by Ernest_at_the_Beach · 11 replies
    Overclockersclub ^ | March 21, 2014 09:50AM | Guest_Jim_*
    The atom-thick sheet of carbon, graphene already has a number of amazing properties to it, including strength and electrical conductivity. As impressive its conductivity is though, superconductivity is still greater and has been observed with graphene, but not explained. Researchers at the SLAC National Accelerator Laboratory and Stanford University have now found how graphene and calcium become a superconductor.Called calcium intercalated graphite, or CaC6 is produced by interweaving calcium and graphite, which is a means of isolating sheets of graphene. About ten years ago it was discovered that this material could become superconducting, but neither the exact means nor...
  • IBM Demonstrates Graphene-Powered RF Processor.

    02/06/2014 7:35:05 AM PST · by Ernest_at_the_Beach · 6 replies
    Xbitlabs ^ | 01/30/2014 11:47 PM | by Anton Shilov
    Graphene, one of the world’s thinnest electronic nanomaterials, has long held the promise as a wonder material in everything from flexible touchscreens to super-fast circuits. IBM researchers have demonstrated one of the first working prototype chips made of graphene. They created a logic circuit that was reliable enough to send and receive a text message. The demonstration has the potential to improve today’s wireless devices’ communication speed, and lead the way toward carbon-based electronics device and circuit applications beyond what is possible with today’s silicon chips. Integrating graphene radio frequency (RF) devices into today’s low-cost silicon technology could also be...
  • Researchers Discover Natural 3D Counterpart to Graphene.

    01/23/2014 9:50:30 AM PST · by Ernest_at_the_Beach · 21 replies
    Xbitlabs ^ | 01/21/2014 11:50 PM | Anton Shilov
    A collaboration of researchers at the U.S department of energy (DOE)’s Lawrence Berkeley national laboratory (Berkeley Lab) has discovered that sodium bismuthide can exist as a form of quantum matter called a three-dimensional topological Dirac semi-metal (3DTDS). This is the first experimental confirmation of 3D Dirac fermions in the interior or bulk of a material, a novel state that was only recently proposed by theorists.
  • Bio-inspired method to grow high-quality graphene for high-end electronic devices (Breakthrough?)

    12/16/2013 3:20:28 PM PST · by 2ndDivisionVet · 2 replies
    Space Daily ^ | December 17, 2013 | Staff
    A team of researchers from the National University of Singapore (NUS), led by Professor Loh Kian Ping, who heads the Department of Chemistry at the NUS Faculty of Science, has successfully developed an innovative one-step method to grow and transfer high-quality graphene on silicon and other stiff substrates, opening up opportunities for graphene to be used in high-value applications that are currently not technologically feasible. This breakthrough, inspired by how beetles and tree frogs keep their feet attached to submerged leaves, is the first published technique that accomplishes both the growth and transfer steps of graphene on a silicon wafer....
  • Scientists Develop Graphene-Coated Silicon Supercapacitor

    10/24/2013 1:12:03 PM PDT · by Red Badger · 34 replies
    scitechdaily.com ^ | 10-24-2013 | Staff - Source: David Salisbury, Vanderbilt University
    Using porous silicon coated with graphene, material scientists at Vanderbilt University have developed the first supercapacitor that is made out of silicon. Solar cells that produce electricity 24/7, not just when the sun is shining. Mobile phones with built-in power cells that recharge in seconds and work for weeks between charges. These are just two of the possibilities raised by a novel supercapacitor design invented by material scientists at Vanderbilt University that is described in a paper published in the October 22 issue of the journal Scientific Reports. It is the first supercapacitor that is made out of silicon so...
  • Strongest Material Ever Found in Atom-Thick Carbyne Chains

    10/12/2013 12:44:48 PM PDT · by Straight Vermonter · 54 replies
    Science World Report ^ | Oct 11, 2013
    The strongest material ever could be carbyne, atom-thick chains of carbon, according to theoretical calculations by Rice University Physicists. The big question is now if and when anyone can make it in bulk. Carbyne is a chain of carbon atoms held together by either double or alternating single and triple atomic bonds. That makes it a true one-dimensional material, unlike atom-thin sheets of graphene, which have a top and a bottom, or hollow nanotubes, which have an inside and outside. These carbyne nanorods or nanoropes, if they can be made, would have a host of remarkable and useful properties, as...
  • New Development Could Enable Graphene-Based Magnetic Media Storage.

    07/19/2013 12:16:19 PM PDT · by Ernest_at_the_Beach · 1 replies
    Xbitlabs ^ | 07/18/2013 11:50 PM | by Anton Shilov
    Scientists Create Magnetic Switch from Graphene Researchers in Singapore have designed an electronic switch that responds to changes in a magnetic field. The device relies on graphene, a strong and flexible electricity-conducting layer of carbon atoms arranged in a honeycomb pattern. The transistor is based on two nanoribbons of graphene, each just a few tens of nanometers wide, which are joined end to end. The atoms along the edges of these nanoribbons are arranged in an ‘armchair’ configuration – a pattern that resembles the indented battlements of castle walls. If these edges were in a zigzag pattern, however, the material...
  • Jagged graphene edges can slice into cell membranes

    07/11/2013 3:37:24 PM PDT · by neverdem · 8 replies
    Biology News Net ^ | July 10, 2013 | NA
    Sharp corners and jagged edges on graphene sheets enable them to puncture cell membranes. Researchers from Brown University have shown how tiny graphene microsheets — ultra-thin materials with a number of commercial applications — could be big trouble for human cells. The research shows that sharp corners and jagged protrusions along the edges of graphene sheets can easily pierce cell membranes. After the membrane is pierced, an entire graphene sheet can be pulled inside the cell where it may disrupt normal function. The new insight may be helpful in finding ways to minimize the potential toxicity of graphene, said...
  • Green graphene band-aid

    07/10/2013 11:21:04 PM PDT · by neverdem · 20 replies
    Chemistry World ^ | 7 July 2013 | Anthony King
    Scientists in the US and China have revealed that graphene kills bacteria by slicing through their membranes and yanking out their phospholipids. They say graphene could become a new type of ‘green’ antimicrobial material for everyday use, applied directly to wounds.Modelling and transmission electron microscopy showed that . It cut through the membranes and extracted large amounts of phospholipids from cell membranes because of strong dispersion interactions between graphene and lipid molecules. Graphene kills bacteria by slicing through their membranes and yanking out their phospholipids‘Once extracted, the strong hydrophobic interactions between graphene and phospholipids – as they are pushed together...
  • Invention allows clear photos in dim light (graphene 1,000x more sensitive than CCD or CMOS)

    05/31/2013 4:13:02 PM PDT · by LibWhacker · 31 replies
    PhysOrg ^ | 5/30/13
    Cameras fitted with a new revolutionary sensor will soon be able to take clear and sharp photos in dim conditions, thanks to a new image sensor invented at Nanyang Technological University (NTU). The new sensor made from graphene, is believed to be the first to be able to detect broad spectrum light, from the visible to mid-infrared, with high photoresponse or sensitivity. This means it is suitable for use in all types of cameras, including infrared cameras, traffic speed cameras, satellite imaging and more. Not only is the graphene sensor 1,000 times more sensitive to light than current imaging sensors...
  • Ultrashort laser pulses squeezed out of graphene

    05/24/2013 10:39:35 PM PDT · by neverdem · 5 replies
    Nature News ^ | 24 May 2013 | Katia Moskvitch
    Experiments suggest that the carbon sheets can produce beams in broad range of colours. Graphene, hailed as one of the thinnest, strongest and most conductive materials ever found, seems to have bagged one more amazing property. Experiments suggest that it can be used to create ultrashort laser pulses of any colour, owing to an ability to absorb light over a broad range of wavelengths. The discovery could help researchers to build small, cheap and highly versatile ultrashort-pulse lasers, with potential applications ranging from micro-machinery to medicine. Conventional ultrashort-pulse lasers use a material that absorbs light like a sponge and then...
  • Sticky problem snares wonder material - Graphene-like form of silicon proves hard to handle.

    03/14/2013 10:51:28 PM PDT · by neverdem · 12 replies
    Nature News ^ | 12 March 2013 | Geoff Brumfiel
    In 2011, physicist Guy Le Lay stood before a half-filled room on the last day of the American Physical Society’s March meeting in Dallas, Texas, and presented data on a new form of silicon. In his laboratory at Aix-Marseille University in France, Le Lay had grown sheets of honeycombed silicon with layers just one atom thick. He had only preliminary evidence that was unpublished at the time. “It was a risk, you know?” he says now of his decision to present the data. At this year’s meeting, on 18–22 March in Baltimore, Maryland, scientists will deliver about two dozen talks...
  • MIT Scientists Mix Graphene with Hexagonal Boron Nitride to Create New Material for Computer Chips.

    05/24/2013 9:49:30 AM PDT · by Ernest_at_the_Beach · 20 replies
    Xbitlabs ^ | 05/22/2013 08:57 PM | Anton Shilov
    Researchers Create New Material for Semiconductors Graphene has dazzled scientists, ever since its discovery more than a decade ago, with its unequalled electronic properties, its strength and its light weight. But one long-sought goal has proved elusive: how to engineer into graphene a property called a band gap, which would be necessary to use the material to make transistors and other electronic devices.Now, new findings by researchers at MIT are a major step toward making graphene with this coveted property. The work could also lead to revisions in some theoretical predictions in graphene physics. The new technique involves placing a...
  • Understanding defects in graphene

    05/10/2013 10:09:26 PM PDT · by neverdem · 6 replies
    Chemistry World ^ | 9 May 2013 | Emma Stoye
    The products of thermally exfoliating graphite oxide to make graphene are much more complex than previously thought, new research shows. The volatile compounds formed vary with reaction conditions, and may influence the graphene’s structure.The most common way to prepare graphene is by thermally reducing – or ‘exfoliating’ – graphite oxide. But the graphene produced often contains defects and lacks the perfect honeycomb structure. One explanation is that these defects may be the result of organic by-products forming and escaping as gases during the reaction.‘It has been commonly believed that the only gaseous products of graphite oxide exfoliation are water, carbon...
  • Century-old problem: ... professor finds out what causes low-frequency electronic 1/f noise

    03/07/2013 8:42:43 AM PST · by Red Badger · 37 replies
    Phys.Org ^ | 03-07-2013 | Provided by University of California - Riverside
    FULL TITLE: Solving nearly century-old problem: Using graphene, professor finds out what causes low-frequency electronic 1/f noise =========================================================== A University of California, Riverside Bourns College of Engineering professor and a team of researchers published a paper today that show how they solved an almost century-old problem that could further help downscale the size of electronic devices. The work, led by Alexander A. Balandin, a professor of electrical engineering at UC Riverside, focused on the low-frequency electronic 1/f noise, also known as pink noise and flicker noise. It is a signal or process with a power spectral density inversely proportional to...
  • Video: The battery that might change everything

    02/23/2013 12:51:19 PM PST · by Para-Ord.45 · 80 replies
    http://hotair.com ^ | february 23 2013 | jazz shaw
    Some of the great scientific breakthroughs of the last century came about entirely by accident. Many of you are probably familiar with the origins of the Post It Note, and how it was invented as a result of a failure when attempting to create a super strong adhesive. Well, there may be another such story taking place in the present day. Scientists working with carbon compounds developed Graphene, a safe substance with a lot of structural strength for very little mass and weight. And then some wise guy discovered that it had another use. The recap: Graphene, a very simple...
  • Spotting silicon in graphene, it's dope

    11/27/2012 1:04:16 PM PST · by neverdem · 14 replies
    Chemistry World ^ | 26 November 2012 | David Bradley
    Atomic structures for three-fold and four-fold coordinated silicon impurities in monolayer graphene © APSA combination of scanning transmission electron microscopy and atomic-resolution spectroscopic techniques has allowed US researchers to pick out individual silicon atoms in a doped graphene sheet. The technique reveals that the silicon atoms can exist in a planar hybridised ‘sp2d’ like form when bonded to four carbon atoms, as well as the anticipated sp3 form when triply coordinated. The experimental observations mesh with simulations of two-dimensional solids and point the way to a method for exploring single impurities in graphene and related materials.Stephen Pennycook and colleagues at...
  • An ultralight graphene structure for all seasons

    10/12/2012 3:24:30 PM PDT · by neverdem · 8 replies
    Chemistry World ^ | 12 October 2012 | Jon Cartwright
    The graphene framework is not only light, it's flame resistant and mops up oil © Wiley-VCHChemists in China claim to have created the lightest graphene framework to date. The material, which is light enough to rest on a dandelion seed head, is also fire resistant and has record-breaking adsorption and capacitance.The development of ultralight materials has exploded in recent years. Last year, engineers in the US presented a material made of hollow metallic tubes in a micro-lattice. With a density of 0.9mg/cm3, the material was 100 times lighter than styrofoam. Yet that record was beaten in July, when material scientists...
  • New material may replace silicon

    10/04/2012 4:34:27 PM PDT · by null and void · 25 replies
    Electronic Products ^ | 10/4/12 | Written by:Bĺrd Amundsen/Thomas Keilman. Translation: Glenn Wells/Carol B. Eckmann
    Norwegian researchers are the world’s first to develop a method for producing semiconductors from graphene. This finding may revolutionise the technology industry. The method involves growing semiconductor-nanowires on graphene. To achieve this, researchers “bomb” the graphene surface with gallium atoms and arsenic molecules, thereby creating a network of minute nanowires. The result is a one-micrometre thick hybrid material which acts as a semiconductor. By comparison, the silicon semiconductors in use today are several hundred times thicker. The semiconductors’ ability to conduct electricity may be affected by temperature, light or the addition of other atoms.Fantastic potential Graphene is the thinnest material...
  • High-frequency self-aligned graphene transistors with transferred gate stacks ( 400+ GHz )

    07/06/2012 1:16:15 PM PDT · by Ernest_at_the_Beach · 13 replies
    pnas.org ^ | June 8, 2012 | Edited by Paul L. McEuen,
    Graphene has attracted enormous attention for radio-frequency transistor applications because of its exceptional high carrier mobility, high carrier saturation velocity, and large critical current density. Herein we report a new approach for the scalable fabrication of high-performance graphene transistors with transferred gate stacks. Specifically, arrays of gate stacks are first patterned on a sacrificial substrate, and then transferred onto arbitrary substrates with graphene on top. A self-aligned process, enabled by the unique structure of the transferred gate stacks, is then used to position precisely the source and drain electrodes with minimized access resistance or parasitic capacitance. This process has therefore...
  • Unique Properties of Graphene Lead to a New Paradigm for Low-Power Telecommunications

    07/16/2012 11:27:45 AM PDT · by Ernest_at_the_Beach · 14 replies
    ScienceDaily ^ | July 15, 2012
    New research by Columbia Engineering demonstrates remarkable optical nonlinear behavior of graphene that may lead to broad applications in optical interconnects and low-power photonic integrated circuits. With the placement of a sheet of graphene just one-carbon-atom-thick, the researchers transformed the originally passive device into an active one that generated microwave photonic signals and performed parametric wavelength conversion at telecommunication wavelengths."We have been able to demonstrate and explain the strong nonlinear response from graphene, which is the key component in this new hybrid device," says Tingyi Gu, the study's lead author and a Ph.D. candidate in electrical engineering. "Showing the power-efficiency...
  • Rapid synthesis of graphene capsules

    05/10/2012 8:10:23 PM PDT · by neverdem · 4 replies
    Chemistry World ^ | 03 May 2012 | Tegan Thomas
    A rapid route to synthesise graphene capsules has been developed by researchers in the US and Korea. The capsules can be nano-engineered on demand and show promise in oil absorption. After oil uptake the capsules aggregate on the water surface allowing them to be collected Hollow spheres of graphene or graphene oxide (GO) have previously been made, but usually via complicated routes that involve the assembly of GO sheets onto template particles and then a separate template removal step. Now, a team led by Jiaxing Huang at Northwestern University and HeeDong Jang at the Korea Institute of Geoscience and Mineral...
  • Graphene emits infrared light

    04/25/2012 11:44:33 PM PDT · by neverdem · 10 replies
    physicsworld.com ^ | Apr 25, 2012 | Belle Dumé
    Physicists in the US have discovered yet another useful property of the wonder material graphene – it can function much like a laser when excited with very short femtosecond light pulses. The team has shown that the material has two technologically important properties – population inversion of electrons and optical gain. The findings suggest that graphene could be used to make a variety of optoelectronics devices, including broadband optical amplifiers, high-speed modulators, and absorbers for telecommunications and ultrafast lasers. Graphene is a sheet of carbon atoms arranged in a honeycomb-like lattice just one atom thick. Since its discovery in 2004,...
  • Nanomachines could benefit from superlubricity

    04/11/2012 11:16:01 PM PDT · by neverdem · 5 replies
    Physics World ^ | Apr 5, 2012 | Jon Cartwright
    Researchers in China and Australia have observed superlubricity – the dropping of friction to near zero – on length scales much larger than before. They say that the phenomenon, which they measured in sheared pieces of graphite, could find applications in sensitive microscopic resonators or nanoscale gyroscopes. Superlubricity is sometimes used to mean simply very low friction, but the original meaning is that the friction between two surfaces disappears almost completely. Proposed in the early 1990s by Motohisa Hirano, then at the Nippon Telegraph and Telephone Corporation in Tokyo, Japan, and others, it relies on a special arrangement of atoms...
  • Graphene puts wet chemistry under the microscope

    04/08/2012 12:54:35 PM PDT · by neverdem · 7 replies
    Chemistry World ^ | 05 April 2012 | Simon Hadlington
    The list of remarkable applications for graphene grows ever longer. This time, scientists in the US and Korea have shown that the single-atom thick carbon membrane can be used as a cover slip for an electron microscope to allow atomic-resolution observations of wet chemistry - something that is notoriously tricky to achieve. The graphene cover slip allows researchers to watch liquid chemistry taking place in much greater detail © Image courtesy of Alivisatos, Lee and Zettl research groups, Lawrence Berkeley National Laboratory and KAIST The researchers wanted to investigate how platinum nanocrystals form from solution. 'Seeing the crystals form at...