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Keyword: graphene

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  • Physicists Harness the Atomic Motion of Graphene to Generate Clean, Limitless Power

    10/02/2020 7:09:57 AM PDT · by Red Badger · 64 replies
    SciTechDaily.com ^ | sOctober 2, 2020 | By University of Arkansas
    Researchers build circuit that harnessed the atomic motion of graphene to generate an electrical current that could lead to a chip to replace batteries. ============================================================================ A team of University of Arkansas physicists has successfully developed a circuit capable of capturing graphene’s thermal motion and converting it into an electrical current. “An energy-harvesting circuit based on graphene could be incorporated into a chip to provide clean, limitless, low-voltage power for small devices or sensors,” said Paul Thibado, professor of physics and lead researcher in the discovery. The findings, published in the journal Physical Review E, are proof of a theory the...
  • Irish Researchers Find New Way Of Producing Graphene Using Irish Whiskey

    10/25/2019 12:12:01 PM PDT · by 2ndDivisionVet · 20 replies
    Irish Tech News ^ | October 25, 2019
    Researchers at AMBER, the SFI Research Centre for Advanced Materials and BioEngineering Research hosted by Trinity College Dublin, today announced the development of a new way to exfoliate graphene using Irish whiskey. An increasing number of graphene production techniques have been developed to enable graphene’s use in commercial applications. Liquid-phase exfoliation – pioneered by AMBER researchers – has been deemed by the research community as one of the most efficient and scalable means for producing high-quality graphene sheets. In this study, the team from AMBER have shown that defect-free nanosheets can be exfoliated in Irish whiskey and also that inks...
  • Tetra Pak to research uses for graphene in the packaging industry

    10/19/2019 10:00:05 PM PDT · by 2ndDivisionVet · 10 replies
    Packaging Gateway ^ | October 16, 2019 | Rosie Lintott
    Multinational food packaging company Tetra Pak will be exploring the possible future applications of graphene in food and beverage manufacturing as the exclusive representative from the packaging industry at the European Commission Graphene Flagship project. The company is leading research and development in the packaging industry into how graphene can be used to unlock innovations for food and beverages. Graphene is a thin, carbon-based material that is around 200 times stronger than steel. It is an excellent conductor of heat and electricity, and absorbs light in a number of ways. Tetra Pak will look at how graphene can be used...
  • Graphene adds Step-Change to Clean Water Tech

    10/04/2019 7:57:23 PM PDT · by 2ndDivisionVet · 7 replies
    Labmate ^ | October 3, 2019
    Removing salts from brackish water using graphene-based membranes is being conducted by researchers from the University of Manchester and Khalifa University of Science and Technology in Abu Dhabi, in a bid to tackle water scarcity. Reverse osmosis, which requires large quantities of water to be forced through a membrane, is a popular method to remove high content of salts; however, bodies of brackish water, with lower salt content, require more efficient methods. The team of researchers developed new ion-selective membranes incorporating graphene oxide, for use in electromembrane desalination processes such as electrodialysis and membrane capacitive deionisation, which drives ions in...
  • New method to fabricate graphene sheet fabricated from camphor

    09/03/2019 11:37:25 PM PDT · by 2ndDivisionVet · 12 replies
    Down To Earth ^ | August 19, 2019 | Susheela Srinivas
    Graphene, a recently discovered wonder material, is increasingly sought after for its superior electrical, thermal, optical and mechanical properties. It is used in the manufacture of optoelectronic devices such as detectors, sensors and solar cells. It is made up of one-atom-thick, honeycomb-like structure of carbon atoms. A significant challenge faced by scientists is the fabrication of large-area graphene sheets for devices. Finding a ‘green’ source for the carbon atoms is another hurdle. Indian researchers have now developed a new method to fabricate graphene sheets from camphor — a readily available ingredient often used in religious rituals. “Camphor is a plant...
  • Graphene and Water Treatment

    08/31/2019 11:50:48 PM PDT · by 2ndDivisionVet · 19 replies
    AZO Cleantech ^ | August 28, 2019 | Dr. Ramya Dwivedi, Ph.D.
    Over 2 billion people are facing a water crisis, and water-related hygiene and sanitation problems. Clean water is the base for economic development of any society. Water treatment produces clean water. Water treatment includes sedimentation, filtration, aeration, solar treatment, chlorination, and sterilization by boiling. A wide range of treatment processes have evolved to suit the different local conditions. Water treatment must produce ‘clean water’, which is having all contaminants safely below the maximum permissible limits (MPL). With oft revised MPL, new materials are explored to address the presence of contaminants such as microbes, heavy metal ions, oils, pesticides, disinfection byproduct...
  • Samsung rumored to launch phone with graphene battery next year

    08/20/2019 7:29:04 PM PDT · by 2ndDivisionVet · 28 replies
    Graphene Info ^ | August 19, 2019 | CNet
    Samsung may be in the race to develop a graphene-based alternative to lithium-ion batteries for its phones. Rumors are going around claiming that the Company hopes to have at least one phone with a graphene battery ready next year or by 2021. The word is that these graphene-based batteries will be capable of a full charge in under a half-hour, but they still need to raise capacities while lowering costs. In 2017, Samsung said its researchers developed a "graphene ball" material that enables five times faster charging speeds than standard lithium-ion batteries. Samsung may be looking into battery alternatives following...
  • Flexible generators turn movement into energy

    06/01/2019 7:09:44 PM PDT · by ETL · 12 replies
    Phys.org ^ | May 31, 2019 | Mike Williams, Rice University
    Wearable devices that harvest energy from movement are not a new idea, but a material created at Rice University may make them more practical. The Rice lab of chemist James Tour has adapted laser-induced graphene (LIG) into small, metal-free devices that generate electricity. Like rubbing a balloon on hair, putting LIG composites in contact with other surfaces produces static electricity that can be used to power devices.For that, thank the triboelectric effect, by which materials gather a charge through contact. When they are put together and then pulled apart, surface charges build up that can be channeled toward power generation.In...
  • Toward a High-Velocity Astronomy

    05/15/2019 9:39:55 PM PDT · by LibWhacker · 14 replies
    Centauri Dreams ^ | 5/15/19 | Paul Gilster
    Toward a High-Velocity Astronomyby Paul Gilsteron May 15, 2019 Couple the beam from a 100 gigawatt laser with a single-layer lightsail and remarkable things can happen. As envisioned by scientists working with Breakthrough Starshot, a highly reflective sail made incredibly thin — perhaps formed out of graphene and no thicker than a single molecule — could attain speeds of 20 percent of c. That’s good enough to carry a gram-scale payload to the nearest stars, the Alpha Centauri triple system, with a cruise time of 20 years, for a flyby followed by an agonizingly slow but eventually complete data return....
  • A novel graphene quantum dot structure takes the cake

    08/23/2018 6:26:43 PM PDT · by BenLurkin · 7 replies
    phys.org ^ | August 23, 2018 by | Ben P. Stein
    In a marriage of quantum science and solid-state physics, researchers at the National Institute of Standards and Technology (NIST) have used magnetic fields to confine groups of electrons to a series of concentric rings within graphene, a single layer of tightly packed carbon atoms. This tiered "wedding cake," which appears in images that show the energy level structure of the electrons, experimentally confirms how electrons interact in a tightly confined space according to long-untested rules of quantum mechanics. The findings could also have practical applications in quantum computing. Graphene is a highly promising material for new electronic devices because of...
  • Team led by Indian-American develops trickle-down method to ‘grow’ graphene

    08/06/2018 9:10:38 AM PDT · by 2ndDivisionVet · 9 replies
    The Tribune ^ | August 6, 2018 | IANS
    By making carbon leak (trickle down) through cracks on copper, researchers have developed a new process for “growing” graphene directly on materials used for nano-scale electronic applications, thereby opening the way to produce high-performance electronic devices. This versatile process, developed by a team of chemical engineers led by Indian-American Vikas Berry at the University of Illinois at Chicago (UIC) in the US, enables graphene to be economically grown on almost any semiconducting or dielectric substrate of relevance to the electronic industry, the researchers claim. They have reported this new method in the journal “ACS Applied Materials and Interfaces” of the...
  • Graphene: the wonder material that could solve the world's water crisis

    05/25/2018 3:37:56 PM PDT · by 2ndDivisionVet · 36 replies
    The Telegraph ^ | May 3, 2018 | Aisha Majid
    Graphene, the much-hailed wonder material, may be the solution to the world’s water crisis. One in nine people around the world do not have access to clean, safe water close to their homes and at least 2 billion people are forced to use a drinking water source contaminated with faeces. Dirty water is a serious public health concern and drinking or washing in dirty water spreads diseases such as diarrhoea, cholera and typhoid. Contaminated drinking water causes over 500,000 deaths each year from diarrhoea, a leading killer of children under five. First developed by scientists at the University of Manchester...
  • Graphene confines light to one atom to enable ultra small optical switches, detectors and sensors

    05/16/2018 4:56:57 PM PDT · by 2ndDivisionVet · 16 replies
    Next Big Future ^ | May 16, 2018 | Brian Wang
    Researchers have been able to confine light down to a space one atom, the smallest possible. This will pave the way to ultra-small optical switches, detectors and sensors. Light can function as an ultra-fast communication channel, for example between different sections of a computer chip, but it can also be used for ultra-sensitive sensors or on-chip nanoscale lasers. There is currently much research into how to further shrink devices that control and guide light. New techniques searching for ways to confine light into extremely tiny spaces, much smaller than current ones, have been on the rise. Researchers had previously found...
  • Graphene Makes Concrete Stronger While Reducing Carbon Emissions

    04/30/2018 3:58:45 PM PDT · by 2ndDivisionVet · 28 replies
    Clean Techica ^ | April 30, 2010 | Steve Hanley
    Concrete is one of the most widely used building materials in the world, but it also is responsible for about 5% of all global carbon dioxide emissions according to the Earth Institute at Columbia University. Those emissions result directly from the conversion of limestone into cement and indirectly by burning fuel to heat the limestone to 1400º C, the temperature required to initiate the conversion process. “Cement manufacturing is highly energy and emissions intensive because of the extreme heat required to produce it. Producing a ton of cement requires 4.7 million BTU of energy, equivalent to about 400 pounds of...
  • Why is graphene taking so long?

    03/30/2018 5:38:54 PM PDT · by Bellflower · 35 replies
    techradar.com ^ | 3/5/2018 | Jamie Carter
    Graphene is proper 'disruptive technology'. Every press release in the tech industry now contains that awful phrase, but graphene is the only material capable of changing the world of electronics as we know it. It's ultra-light, just an atom thin, and yet it’s 200 times stronger than steel. It's flexible, transparent, and more conductive than copper. Scientists have been promising stronger, lighter, flexible products, faster transistors, bendable phones, and many other breakthrough graphene gadgets for over a decade. So, what's taking scientists so long to make the graphene era a reality? Or, is it really taking as long as some...
  • Eager to dye your hair with ‘nontoxic’ graphene nanoparticles? Not so fast!

    03/24/2018 9:38:20 PM PDT · by upchuck · 28 replies
    WTOP/AP ^ | Mar 20, 2018
    Graphene is something of a celebrity in the world of nanoscale materials. Isolated in 2004 by Nobel Prize winners Andre Geim and Konstantin Novoselov, these ultrathin sheets of carbon atoms are already finding novel uses in areas like electronics, high-efficiency heating systems, water purification technologies and even golf balls. According to recent research published in the journal Chem, hair dyes can now be added to this list. But how safe and responsible is this new use of the carbon-based wonder-material? Northwestern University’s press release proudly announced, “Graphene finds new application as nontoxic, anti-static hair dye.” The announcement spawned headlines like...
  • This Graphene Filter Makes Dirty Saltwater Drinkable

    02/28/2018 6:15:36 PM PST · by upchuck · 27 replies
    Fast Company ^ | Feb 26, 2018 | ADELE PETERS
    The water in Sydney Harbor–which is salty and polluted by sewage, toxic chemicals, and microplastics–isn’t drinkable. But researchers in Australia recently tested a new type of water filter that purified and desalinated the water in a single step. The same process could potentially be used to help the 2 billion-plus people around the world who lack access to safe drinking water. The filter uses Graphair, a type of graphene, a material made from a thin layer of pure carbon. A film made from the new version of the material, with microscopic nano-channels, has a “unique atomic structure where the channel...
  • Using crumpled graphene balls to make better batteries

    01/18/2018 11:38:20 AM PST · by Red Badger · 9 replies
    techxplore.com ^ | 01/18/2018 | by Amanda Morris, Northwestern University
    Six years ago, Jiaxing Huang discovered crumpled graphene balls -- novel ultrafine particles that resemble crumpled paper balls. Credit: Jiaxing Huang ___________________________________________________________________________________________________________________________________________________________ Lithium metal-based batteries have the potential to turn the battery industry upside down. With the theoretically ultra-high capacity of lithium metal used by itself, this new type of battery could power everything from personal devices to cars. "In current batteries, lithium is usually atomically distributed in another material such as graphite or silicon in the anode," explains Northwestern University's Jiaxing Huang. "But using an additional material 'dilutes' the battery's performance. Lithium is already a metal, so why not...
  • 9 amazing uses for graphene, from filtering seawater to smart paint

    01/14/2018 10:43:30 AM PST · by Swordmaker · 22 replies
    Digital ^ | January 14, 2014 | By Luke Dormehl
    Graphene is a single layer of graphite — also known as that soft material commonly found in pencil lead — with the atoms arranged in a honeycomb-like, hexagonal pattern. While that description is decidedly unexciting, graphene is actually emerging as one of science’s most versatile new materials. Just one atom thick (or thin, depending on how you think about it), graphene is among the strongest materials in the known universe, with 100 times the strength of steel, an astonishing amount of flexibility, and a whole lot of other talents lurking beneath the surface. Do you remember that classic scene from...
  • The Truth About Those 'Alien Alloys' in The NY Times UFO Story

    12/23/2017 11:49:18 AM PST · by BenLurkin · 39 replies
    https://www.space.com/39187-alien-alloys.html ^ | December 21, 2017 09:37pm ET | Rafi Letzter, Live Science Staff Writer
    "I don't think it's plausible that there's any alloys that we can't identify," Richard Sachleben, a retired chemist and member of the American Chemical Society's panel of experts, told Live Science.... Alloys are mixtures of different kinds of elemental metals. They're very common — in fact, Sachleben said, they're more common on Earth than pure elemental metals are — and very well understood. Brass is an alloy. So is steel. Even most naturally occurring gold on Earth is an alloy made up of elemental gold mixed with other metals, like silver or copper. "There are databases of all known phases...