Graphene mini-lab
Physicists create graphene mini-labs to study fast-moving electrons and their relativistic behavior. The experiments mimic the dynamics of cosmic rays, despite traveling at a fraction of the speed of light.
Graphene
Articles tagged with Graphene
Tiny pores in graphene could give rise to membranes
Researchers have found that graphene membranes contain tiny pores, allowing small molecules to pass through while blocking larger ones. This discovery opens up new possibilities for creating membranes that can filter microscopic contaminants from water or separate specific types of molecules from biological samples.
Making a layer cake with atomic precision
Researchers created a multilayer cake using graphene and boron nitride to form a nanoscale electric transformer. The breakthrough paves the way for complex electronic devices with novel architectures.
The graphene-paved roadmap
The graphene-paved roadmap outlines the material's potential for transforming various industries, including electronics and medicine. With its unique properties, graphene is expected to play a crucial role in developing new technologies such as flexible devices, rollable e-paper, and high-speed wireless communications.
Light might prompt graphene devices on demand
Researchers at Rice University have made a breakthrough in doping graphene with light, allowing for the creation of simple, graphene-based diodes and transistors on demand. The discovery uses plasmonics to manipulate light and inject electrons into the material, enabling novel security and cryptography devices.
Graphene membranes may lead to enhanced natural gas production, less CO2 pollution says CU study
The University of Colorado Boulder has developed graphene membranes with tiny pores that can efficiently separate gas molecules based on size. This technology holds promise for enhancing natural gas production while reducing carbon dioxide emissions from power plant exhaust pipes.
UT Dallas research shows graphene nanopores can be controlled
Researchers at UT Dallas have successfully controlled the size of graphene nanopores, enabling potential low-cost DNA sequencing. The achievement could lead to improved disease diagnosis and treatment by allowing tailored drug development based on an individual's genetic code.
Scientists discover novel way to remove defects in materials
Researchers created a defect in the structure of a single-layer crystal by inserting an extra particle, then observed as the crystal 'healed' itself. The discovery has important implications for improving conductivity in electronics and other materials science applications.
Semiconductors grown on graphene
Researchers at NTNU have patented a method to grow semiconductor nanowires on graphene, offering excellent optoelectronic properties. This technology has the potential to enable new types of device systems, including solar cells and self-powered nanomachines, with large market potential.
Every atom counts in graphene formation
Rice University researchers have developed a nanoreactor theory to predict graphene formation, which can advance the material's quality and electronic properties. The team found that the shape of the graphene edge pattern is dictated by the most efficient use of energy, with skewed edges growing fastest.
'Nano machine shop' shapes nanowires, ultrathin films
A new method, called laser shock-induced shaping, enables the tuning of nanowires by altering electrical and optoelectrical properties critical for electronic components and instruments. Graphene was also successfully shaped using this technique.
1-molecule-thick material has big advantages
Researchers at MIT have successfully produced complex electronic components from molybdenum disulfide, a material that naturally comes with a bandgap and could enable new products such as glowing walls, clothing with embedded electronics, and glasses with built-in display screens. The discovery opens up a new realm of research on two-d...
Graphene's behavior depends on where it sits
New experiments show graphene reacts chemically and electrically differently depending on the substrate material, allowing for patterned surfaces with varying chemical behavior. This discovery enables the creation of microarrays of sensors and potential protective coatings for materials.
Physicists explore properties of electrons in revolutionary material
Researchers measured spin properties of electrons in graphene using a new technique, enabling the detection of spin resonance electrically. This breakthrough propels research forward into optimizing graphene for spintronic applications.
A direct look at graphene
Researchers at Lawrence Berkeley National Laboratory have made the first direct observations of electron-electron interactions in graphene. The study reveals that these interactions are critical to graphene's extraordinary properties, including its superconductivity and high-speed conductivity.
Cutting the graphene cake
Researchers at the University of Manchester have developed a side-view imaging technique to visualize individual graphene layers in devices, finding that structures are remarkably stable even with multiple layers. This achievement has significant implications for the engineering of graphene-based computer chips.
Unique properties of graphene lead to a new paradigm for low-power telecommunications
Researchers at Columbia Engineering demonstrate graphene's remarkable optical nonlinear behavior, enabling broad applications in optical interconnects and low-power photonic integrated circuits. The graphene-silicon hybrid device achieves radio frequency generation with a resonant quality factor more than 50 times lower than what other...
Researchers tune the strain in graphene drumheads to create quantum dots
Researchers at NIST and University of Maryland successfully created graphene quantum dots by manipulating the strain in graphene drumheads. By controlling the tension on the drumhead, they mimicked magnetic fields and created semiconducting regions with a band gap, crucial for computing and other applications.
Graphene Research: Trapping light in a carbon net
Researchers have successfully trapped and controlled light within a graphene lattice, allowing for the development of computers with optical switches. This breakthrough demonstrates the high potential of graphene in nanoelectronics.
Graphene is a tunable plasmonic medium
Scientists have demonstrated that they can control the length and height of plasmons on graphene using an electrical circuit, opening up possibilities for information processing in tight spaces. This breakthrough uses infrared light to excite surface plasmons with wavelengths as short as 100 nanometers.
Taming light with graphene
Scientists visualize the trapping and confinement of light on graphene, making it a promising candidate for optical information processing. Graphene plasmons can be used to electrically control light, enabling new optical switches and applications in medicine, bio-detection, solar cells, and quantum information processing.
'Nanocable' could be big boon for energy storage
Researchers at Rice University have created a tiny coaxial cable that is about a thousand times smaller than a human hair and has higher capacitance than previously reported microcapacitors. The nanocable, made with carbon and copper, could be used to build next-generation energy-storage systems.
New research leads to sensors that detect contaminants in water
Researchers at the University of Notre Dame have developed a new sensor that can detect organic contaminants in water at very low concentrations. The sensor uses silver nanoparticles and graphene oxide films, allowing for side-selective deposition of metal ions.
UMD scientists create faster, more sensitive photodetector by tricking graphene
Researchers at the University of Maryland have developed a new type of hot electron bolometer that can detect infrared light with high sensitivity and speed. The device uses bilayer graphene to absorb low-energy photons, making it promising for applications in security imaging technologies and studying dark energy.
Iowa State, Ames Lab researchers find new properties of the carbon material graphene
Iowa State researchers have found a new photo-excited graphene state characterized by broadband population inversion of electrons, resulting in optical gain. This discovery could enable the development of efficient amplifiers and opto-electronics devices.
Graphene-control cutting using an atomic force microscope-based nanorobot
Researchers have developed a closed-loop fabrication method to tailor graphene into desired edge structures and shapes. The technique uses interaction forces as real-time feedback, allowing for precise cutting control. This innovation has the potential to fabricate large-scale graphene-based nanodevices at low cost with high efficiency.
University of Florida physicists set new record for graphene solar cell efficiency
University of Florida physicists achieved a groundbreaking 8.6% power conversion efficiency from a graphene solar cell created in their lab by chemically treating the graphene with trifluoromethanesulfonyl-amide. This breakthrough could make graphene solar cells a contender in the market if production costs are kept low.
Study shows availability of hydrogen controls chemical structure of graphene oxide
Researchers at Georgia Institute of Technology found that hydrogen availability significantly affects graphene oxide's properties, which can be controlled through chemical and thermal treatments. Understanding this control is crucial for realizing potential applications, such as nano-electronics and energy storage.
Not your grandma's quilt
A group of researchers at the University of California, Riverside developed a technique to lower hot spots in GaN transistors by introducing graphene multilayers, increasing device lifetime by a factor of 10. The new approach represents a transformative change in thermal management.
New graphene-based material could revolutionize electronics industry
GraphExeter, a graphene-based material, enhances solar panel efficiency by up to 30% due to its wide light spectrum transparency. It has the potential to replace indium tin oxide in wearable devices and smart windows, offering a flexible alternative for electronics industry
Graphene boosts efficiency of next-gen solar cells
Researchers at Michigan Technological University discovered that adding graphene to titanium dioxide increases conductivity, bringing 52.4% more current into the circuit in dye-sensitized solar cells.
First atomic-scale real-time movies of platinum nanocrystal growth in liquids
A team of scientists has developed a technique to encapsulate liquids containing nanocrystals between layers of graphene, enabling the direct observation of chemical reactions at the atomic scale. This breakthrough allows for unprecedented studies of nanoscale phenomena in liquids.
Graphene lenses: 2-D electron shepherds
Researchers created a graphene lens that focuses electrons by controlling the focal length through geometry changes. The graphene lens uses strained graphene to shepherd electrons to a fine point, allowing for high-speed data exchange without traditional cable restrictions.
UWM discovery advances graphene-based electronics
Researchers at UWM create a semiconducting material called graphene monoxide (GMO) from graphene oxide, which could revolutionize electronics. The discovery pushes carbon materials closer to replacing traditional wires in devices.
High-resolution atomic imaging of specimens in liquid by TEM using graphene liquid cell
Researchers developed a graphene liquid cell to visualize nanoscale processes in fluids with atomic-level resolution. The technology enables real-time imaging of platinum nanocrystals in solution, shedding light on atomic-level dynamics and coalescence.
Microprocessors from pencil lead
Researchers found a way to influence electron flow through graphene by mounting it on boron nitride, enabling more controlled electronic properties. The discovery creates hexagonal structures that prevent some electrons from passing through, opening up new possibilities for graphene-based microelectronics.
Writing graphene circuitry with ion 'pens'
Researchers from the University of Florida have developed a new technique to create graphene patterns on silicon carbide using ion implantation. This method allows for selective graphene growth at lower temperatures and can be used to create graphene nanoribbons with nanoscale dimensions.
Simple, cheap way to mass-produce graphene nanosheets
A new method for mass-producing high-quality graphene nanosheets has been developed by researchers, enabling the production of sheets at a lower cost than current methods. The technique uses dry ice and an industrial process to create flakes of graphite with opened-up edges, making them soluble in solvents and allowing for easy separat...
Straintronics: Engineers create piezoelectric graphene
Researchers at Stanford University have engineered piezoelectricity into a nanoscale material, known as graphene. By modifying the graphene lattice, they were able to achieve fine physical control and created piezoelectric levels comparable to traditional materials. This breakthrough brings new dimension to straintronics and has promis...
Molecular graphene heralds new era of 'designer electrons'
Scientists from Stanford University and SLAC National Accelerator Laboratory have created a system of 'designer electrons' with unique properties. By tuning the fundamental behavior of electrons, researchers can create exotic variants of ordinary electrons that may lead to new types of materials and devices.
Barrier to faster graphene devices identified and suppressed
Researchers at Vanderbilt University have identified a major barrier to faster graphene devices, finding that charged impurities on the surface of graphene scatter electrons. By using electrically neutral liquids, they achieved record-levels of room-temperature electron mobility, three times greater than previous graphene-based devices.
'Miracle material' graphene is thinnest known anti-corrosion coating
Researchers have discovered that graphene provides exceptional corrosion protection, even at a single layer thickness, outperforming conventional coatings. The study's findings suggest graphene could be ideal for applications where a thin coating is necessary, such as in microelectronic components.
A step toward better electronics
Researchers at Northwestern University have created a new method to oxidize graphene, overcoming the material's zero band-gap issue. The reversible oxidation process enables tunability of electronic properties, paving the way for high-performance applications.
Shear stiffness and friction mechanics of single-layer graphene measured for the first time
Researchers from the University of Bristol have identified graphene's stress and strain shear modulus and internal friction, shedding light on its structural behavior as a mechanical material. The study suggests CVD-grown single-layer graphene films could be used in nanosensors, providing a vital alternative to existing materials.
New technology platform for molecule-based electronics
Graphene flakes are used to protect molecules from short circuits, paving the way for new electronics in memory technology, displays, and solar cells. The development solves a decade-old problem and allows for alternative conductive and non-conductive molecules to be used.
5 University of Houston assistant professors receive NSF CAREER awards
The University of Houston assistant professors received NSF CAREER awards for their innovative work on graphene's optical properties, polymer-based cells, and environmental impact. Bao aims to confirm graphene's ability to act as an optical waveguide, while Moeller researches fundamental materials structure-property relationships.
Graphene electronics moves into a third dimension
Researchers at the University of Manchester have created a transistor that may prove graphene's potential as the next silicon for computer chips. The new device uses a vertical direction and exploits graphene's unique features to overcome current leakage issues.
Ultra-fast photodetector and terahertz generator
Scientists have created a graphene-based ultra-fast photodetector that can detect pulses as short as a few picoseconds. The device also generates terahertz radiation, which has properties of both particle and electromagnetic waves. This breakthrough could lead to advancements in material testing and medical treatments.
Supermaterial goes superpermeable
Researchers at the University of Manchester discovered graphene oxide membranes that can selectively remove water while blocking other substances, potentially leading to new applications in filtration and separation
Graphene: Impressive capabilities on the horizon
A Rice University research team made graphene suitable for organic chemistry applications by attaching various molecules to its sheets, enabling advanced chemical sensors and electronic circuits. The hydrogenation process transformed graphene into a semiconducting superlattice, allowing for tailored functionality.
Bilayer graphene works as an insulator
A UC Riverside-led team has identified a property of bilayer graphene that becomes insulating when the number of electrons on the sheet is close to zero. This finding suggests promising routes for digital and infrared technologies, including trilayer and tetralayer graphene with larger energy gaps.
Nature Materials study: Graphene 'invisible' to water
Researchers at Rensselaer Polytechnic Institute and Rice University discovered that a single layer of graphene enables near-perfect wetting transparency. The extreme thinness of graphene allows it to be transparent to water, with contact angles varying from 77 to 86 degrees on different surfaces.
Water sees right through graphene
A new study reveals graphene's ability to enhance conductivity while retaining wetting characteristics, making it a promising coating for various applications. The research found that gold, copper, and silicon get just as wet when clad by a single layer of graphene as they would without.
Flaky graphene makes reliable chemical sensors
Researchers from the University of Illinois at Urbana-Champaign and Dioxide Materials have developed a chemical sensor using randomly stacked graphene flakes. The thin films of flaky graphene outperformed previous sensors made from carbon nanotubes or graphene crystals, detecting trace amounts of test chemicals with high reliability.
Graphene quantum dots: The next big small thing
A Rice University-led team discovered a one-step chemical process to create graphene quantum dots from carbon fiber. The sub-5 nanometer carbon-based quantum dots are highly soluble and have controllable size, with potential for biomedical imaging, protein analysis, and cell tracking.
Hydrogen advances graphene use
Researchers at Linköping University found that hydrogen renders graphene more useful by making its atomic van der Waals forces repulsive, allowing sheets to float freely apart. This discovery has several potential applications, including storage of hydrogen as vehicle fuel and manufacture of friction-free components on a Nano scale.
Slippery when stacked: NIST theorists quantify the friction of graphene
Researchers at NIST developed a new software to quantify the friction of graphene, finding that the material becomes more slippery when stacked. The study provides new quantitative data and sheds light on the differences in graphene's friction compared to three-dimensional graphite-like materials.
Theory explains how new material could improve electronic shelf life
Researchers at the University of Texas at Dallas have discovered a new material called graphene that conducts heat 20 times faster than silicon, leading to more-efficient cooling of electronics and potentially longer-lasting computers and cellphones.
Keeping electronics cool
Researchers at UC Riverside have made a significant discovery in graphene's thermal conductivity, showing that isotopically engineered graphene can conduct heat more efficiently than natural graphene. This finding has the potential to impact various applications, including electronics, photovoltaic solar cells and radars.
Graphene reveals its magnetic personality
Researchers at the University of Manchester have successfully made graphene magnetic by introducing vacancies and nonmagnetic atoms. The study's findings hold promise for future applications in spintronics and electronics, despite the tiny magnetism observed.