Surfing over simulated ripples in graphene
Scientists from India developed a theory governing curved graphene using a quantum simulator based on an optical lattice. The findings could lead to novel graphene-based sensors with controlled deformation.
Graphene
Articles tagged with Graphene
PolyU develops novel efficient and low-cost semitransparent solar cells
Researchers at PolyU have created high-efficiency, low-cost semitransparent perovskite solar cells with graphene electrodes for BIPV applications. The PCEs reach up to 12% and show potential cost savings of over 50% compared to existing silicon-based solar panels.
First superconducting graphene created by UBC researchers
UBC physicists successfully induce superconductivity in single-layer graphene by coating it with lithium atoms, opening up new possibilities for graphene electronics and nanoscale quantum devices. The breakthrough has significant cross-disciplinary impacts, with potential applications in computing, medicine, and sustainable energy.
SourceUniversity of British Columbia·JournalProceedings of the National Academy of Sciences·DateSep 7, 2015
New nanomaterial maintains conductivity in three dimensions
Researchers create a one-step process to make seamless carbon-based nanomaterials that possess superior thermal, electrical and mechanical properties in three dimensions. The material enables high efficiency batteries, supercapacitors, and solar cells, and has potential for applications such as energy storage, sensors, and wearable ele...
Major grant for Manchester graphene research
The five-year grant aims to create prototype nanomaterials with designed functional properties through the assembly of atomic planes from various bulk crystals. Researchers led by Sir Andre Geim will explore flexible optoelectronics, energy harvesting, gas separation and water desalination applications.
Phagraphene, a 'relative' of graphene, discovered
Phagraphene, a two-dimensional carbon material, has been predicted to exist through computer simulation. It consists of penta-, hexa- and heptagonal carbon rings and exhibits distorted Dirac cones, allowing electrons to behave like particles without mass. This discovery opens up new possibilities for flexible electronic devices.
Successful boron-doping of graphene nanoribbon
Researchers at the University of Basel have synthesized boron-doped graphene nanoribbons with controlled band gaps, enabling the development of highly sensitive gas sensors for nitrogen oxides. The material's chemical properties were characterized using atomic force microscopy, revealing high selectivity towards adsorption.
Graphene oxide's secret properties revealed at atomic level
Researchers at Northwestern University discovered that graphene oxide exhibits remarkable plastic deformation before breaking, unlike its more perfect counterpart graphene. This unique property may unlock the secret to scaling up graphene oxide.
Manchester team reveal new, stable 2-D materials
Manchester University researchers have developed a method to stabilize previously unstable 2D crystals, allowing for the study of their properties and potential applications. The breakthrough enables the isolation of these materials in thin stacks, enabling control over their properties and opening up new possibilities for industry.
Laser-burned graphene gains metallic powers
Researchers at Rice University have developed a way to embed metallic nanoparticles into laser-induced graphene, creating a useful catalyst for fuel cells and other applications. The material, called metal oxide-laser induced graphene (MO-LIG), has shown promise as a potential substitute for expensive metals like platinum.
Black phosphorus surges ahead of graphene
A Korean team tunes black phosphorus' band gap to form a superior conductor, enabling mass production for electronic and optoelectronic devices. This breakthrough allows for great flexibility in device design and optimization.
Discovery in growing graphene nanoribbons could enable faster, more efficient electronics
University of Wisconsin-Madison researchers have discovered a way to grow graphene nanoribbons directly on germanium semiconductor wafers, overcoming precision and edge quality issues. The technique enables the mass production of nanoribbons with desirable semiconducting properties for high-performance electronics.
Better together: Graphene-nanotube hybrid switches
Researchers have created digital switches using graphene-nanotube hybrids, outperforming existing graphene-based switches. The material's lopsided band gaps create a potential barrier that stops electrons, enabling high-speed switching.
A cost-effective solution to tuned graphene production
Researchers developed a simple electrochemical approach to create intentionally defective graphene, altering its properties. By varying voltage, they controlled the thickness, flake area, and number of defects in graphene.
More efficient process to produce graphene developed by Ben-Gurion University researchers
Researchers at Ben-Gurion University have developed a new one-step graphene production process that is faster and potentially scalable. The lamp-ablation method produces high-yield few-layer graphene without toxic substances.
US Navy eyes graphene nanoribbon for ultimate power control system
The US Navy is developing narrow strips of graphene called nanoribbons to improve power control systems in ships, smartphones and electronic devices. Graphene nanoribbons can conduct electricity with reduced heat loss and added strength compared to traditional materials.
An easy, scalable and direct method for synthesizing graphene in silicon microelectronics
Researchers from Korea University have developed an easy and microelectronics-compatible method to grow graphene, allowing for the synthesis of high-quality, multi-layer graphene on silicon substrates. The technique involves ion implantation and activation annealing, enabling controllable and scalable production of large-area graphene.
Graphene electrons share the heat
Researchers discovered that graphene electrons share heat when exposed to ultrafast electrical currents, behaving like a hot gas. This thermodynamic approach allows for better understanding and improvement of graphene-based nano-electronic devices.
A most singular nano-imaging technique
Researchers at Berkeley Lab developed a new technique called SINGLE that provides 3D images of individual platinum nanoparticles in solution. This allows for the study of their structures and properties, which is crucial for applications in renewable energy, catalysis, and more.
Weyl points: Wanted for 86 years
Researchers find Weyl points, predicted by Hermann Weyl in 1929, in photonic crystals, opening a new area of photonics. The discovery paves the way for new photonic phenomena and applications, including angularly selective materials and powerful single-frequency lasers.
SourceMassachusetts Institute of Technology, Institute for Soldier Nanotechnologies·JournalScience·DateJul 16, 2015
On the way to breaking the terahertz barrier for graphene nanoelectronics
Graphene transistors and photodetectors will benefit from this simpler thermodynamic approach, allowing for improved performance. Researchers have discovered that the energy of ultrafast electrical currents is efficiently converted into electron heat, enabling faster operation speeds.
For faster, larger graphene add a liquid layer
Researchers at Oxford University have developed a scalable technique to produce millimetre-sized graphene crystals in minutes, compared to hours using current methods. The new approach creates a liquid layer that smooths out nanoscale valleys, allowing for larger flakes of high-quality graphene.
Plantations of nanorods on carpets of graphene capture the Sun's energy
Scientists have developed a photocatalytic material that captures solar energy to catalyze chemical reactions. The innovative 3D material achieves high yields with minimal recombination, opening up new possibilities for the pharmaceutical and chemical industries.
SourceInstitute of Physical Chemistry of the Polish Academy of Sciences·JournalAdvanced Functional Materials·DateJul 15, 2015
'White graphene' structures can take the heat
Researchers at Rice University have found that three-dimensional boron nitride structures can efficiently control heat flow in electronics by slowing down phonon transfer between layers. These structures, composed of hexagonal boron nitride sheets and boron nitride nanotubes, can be tuned to create thermal switches or rectifiers.
Graphene-based film can be used for efficient cooling of electronics
Researchers developed a graphene-based film that efficiently cools electronics by increasing thermal conductivity to four times that of copper. The film can be attached to silicon components, overcoming previous adhesion issues, and has been tested with an additive creating stronger silane bonds, resulting in improved heat transfer.
Graphene gets competition
Researchers have developed black arsenic phosphorus as an alternative to graphene for electronic devices. The new material exhibits an extremely small band gap and can be precisely controlled by adjusting the arsenic concentration, making it suitable for sensors and other applications.
A graphene-based sensor that is tunable and highly sensitive
Researchers developed a graphene-based sensor that can detect nanometer-sized molecules and reveal their structure. By harnessing the unique optical and electronic properties of graphene, scientists improved upon infrared absorption spectroscopy to create a highly sensitive molecule sensor.
A tunable, highly sensitive graphene-based molecule sensor
Scientists at EPFL and ICFO have developed a reconfigurable, highly sensitive graphene-based molecule sensor that can detect nanometric compounds. The device exploits the unique electronic and optical properties of graphene to focus light on precise spots, enabling detection of tiny molecules.
Sensitive and specific: A new way of probing electrolyte/electrode interfaces
Researchers developed a novel diffraction spectroscopy technique to probe chemical processes at the electrode/electrolyte interface, offering enhanced sensitivity and specificity. The method uses graphene gratings to detect molecular vibrations with sub-monolayer sensitivity.
Bats do it, dolphins do it -- now humans can do it, too
Physicists at UC Berkeley have created lightweight ultrasonic loudspeakers and microphones using graphene, allowing humans to communicate and gauge distance like bats and dolphins. The devices offer improved fidelity and efficiency compared to traditional ultrasound or sonar methods.
SourceUniversity of California - Berkeley·JournalProceedings of the National Academy of Sciences·DateJul 7, 2015
A cool way to form 2-D conducting polymers using ice
Researchers at POSTECH develop a method to form PANI nanosheets on deep frozen ice, resulting in high electronic current flows and conductivity. The process is environmentally friendly, inexpensive, and can produce large areas of nanosheets in minutes.
Transition from 3 to 2 dimensions increases conduction, MIPT scientists discover
Researchers found that electron-phonon interaction is suppressed in 2D materials due to dimensional effects, leading to increased conduction. The discovery has potential applications in the creation of future flat and flexible electronic devices.
Graphene flexes its electronic muscles
Researchers at Rice University have discovered that graphene can be controlled by twisting it, creating an electronic flexoelectric effect. This property can be manipulated to vary the work function and engineer the band-structure stacking in bilayers or multiple layers.
Breakthrough graphene production could trigger revolution in artificial skin development
Researchers at the University of Exeter have discovered a new technique for producing high-quality, low-cost graphene, paving the way for flexible electronic skin development. The breakthrough could enable the creation of truly flexible electronics and wearable technologies.
Towards graphene biosensors
Researchers have successfully created graphene biosensors that can selectively bind to specific molecules, allowing for precise detection and control. This breakthrough enables the development of inexpensive 'lab-on-a-chip' devices for medical diagnostics, promising a significant impact on healthcare.
SourceHelmholtz-Zentrum Berlin für Materialien und Energie·JournalElectrochemistry Communications·DateJun 24, 2015
Physicists fine-tune control of agile exotic materials
Researchers have successfully controlled the length and strength of waves of atomic motion, promising applications in fine-scale imaging and information transmission. Hybrid polaritons propagate throughout many layers of a crystalline material and can be tuned with an electronic gate.
Robust new process forms 3-D shapes from flat sheets of graphene
The researchers have developed a robust approach to integrate graphene onto 3D microstructured surfaces, maintaining the structural integrity of graphene. The process incorporates three sequential steps: substrate swelling, shrinking, and adaptation, allowing for damage-free integration of graphene on 3D microstructures.
Five new calcium carbides: Unique reducers and new hydrocarbon synthesis methods
Researchers predict and synthesize five new calcium carbides with varied chemical and physical properties, including a two-dimensional metal-like compound. The discovery opens up possibilities for industrial applications in the chemical industry.
Stanford engineers find a simple yet clever way to boost chip speeds
Researchers at Stanford University have found a way to improve chip speeds by wrapping copper wires with a protective layer of graphene. This modest fix can lead to faster data processing and is especially beneficial as transistors continue to shrink in size.
Graphene heat-transfer riddle unraveled
A team of researchers solved the long-standing issue of how grain boundaries affect heat conductivity in graphene thin films. They devised a technique to measure heat transfer across single grain boundaries, finding it was 10 times lower than theoretically predicted values.
World's thinnest lightbulb -- graphene gets bright!
Researchers at Columbia University have successfully demonstrated an on-chip visible light source using graphene, a single layer of carbon atoms. The graphene-based light emitter can be integrated into chips and is expected to revolutionize the development of photonic circuits and displays.
SourceColumbia University School of Engineering and Applied Science·JournalNature Nanotechnology·DateJun 15, 2015
New boron compounds for organic light-emitting diodes
Researchers at Goethe University Frankfurt have developed a new class of organic luminescent materials featuring blue fluorescence, which are suitable for use in organic light-emitting diodes. The boron-containing nanographenes exhibit improved electron transport and stability, making them ideal for portable electronic devices.
Slip sliding away: Graphene and diamonds prove a slippery combination
Scientists at Argonne National Laboratory have found a way to create a material combination that demonstrates superlubricity, a highly-desirable property in which friction drops to near zero. The team used graphene and diamond nanoparticles to create a nanoscale phenomenon, but found that humidity inhibited the effect.
Improving the delivery of chemotherapy with graphene
Researchers found that graphene prevents damage to chemotherapy drugs and reduces potential for catheters breaking, potentially improving treatment efficacy. Graphene's biocompatibility and low toxicity make it a promising alternative coating material.
Thin coating on condensers could make power plants more efficient
Researchers at MIT developed a graphene coating that improves condenser heat transfer, potentially leading to a 2-3% overall improvement in power plant efficiency and significant reductions in carbon emissions. The coating has been shown to last for two weeks without degrading under typical power plant conditions.
Simulations predict flat liquid
Researchers have predicted a liquid phase in atomically thin golden islands that patch small pores of graphene, where gold atoms flow and change places in the plane. The liquid state is possible when the edge of graphene pore stretches the metallic membrane.
Taking control of light emission
By pairing graphene and hexagonal boron nitride, researchers can control light waves and create unique optical materials. This enables the development of tiny optical waveguides and new applications in infrared spectroscopy and imaging devices.
Scientists print low cost radio frequency antenna with graphene ink
Researchers from the University of Manchester have printed a radio frequency antenna using compressed graphene ink, demonstrating its potential for commercial use in low-cost applications. The antenna is flexible, environmentally friendly, and could be mass-produced at a lower cost than traditional metals.
Printing 3-D graphene structures for tissue engineering
A Northwestern University team developed a novel graphene-based ink that can print large, robust 3D structures while preserving the material's unique properties. The ink allows for the creation of flexible and strong scaffolds that can support stem cells and promote differentiation into neuron-like cells.
Graphene holds key to unlocking creation of wearable electronic devices
Researchers created a truly electronic textile using graphene, revolutionizing wearable devices like smart clothing and phones. The breakthrough enables flexible and transparent electrodes, paving the way for innovative applications in healthcare, defense, and communication.
Diagnostics of quality of graphene and spatial imaging of reactivity centers on carbon surface
Researchers introduced a procedure to visualize defects on graphene layers using a contrast agent, revealing organized patterns of defects. This imaging approach enables the visualization of chemical reactivity at the nanoscale.
SourceInstitute of Organic Chemistry, Russian Academy of Sciences·JournalChemical Science·DateMay 8, 2015
Plugging up leaky graphene
Researchers have developed a process to repair leaks in graphene membranes, filling cracks and plugging holes using chemical deposition and polymerization techniques. The team created tiny, uniform pores in the material, allowing only water to pass through, resulting in high flow rates and efficient filtration.
Electrons corralled using new quantum tool
Researchers have created a new 'whispering gallery' effect for electrons in graphene, allowing precise control over the reflecting region. This confinement could lead to the development of electronic lenses and other quantum-based electron-optics devices, enabling the study of subtle charge carrier behavior at a microscopic level.
Channeling valleytronics in graphene
Berkeley Lab researchers have discovered topologically protected one-dimensional electron conducting channels at the domain walls of bilayer graphene. These conducting channels feature a ballistic length of about 400 nanometers at 4 kelvin, making them suitable for applications such as quantum computing.
Two-dimensional semiconductor comes clean
Researchers at Columbia Engineering and their collaborators have demonstrated the improvement of molybdenum disulfide (MoS2) performance by encapsulating it in boron nitride (BN), an insulating material. This breakthrough enables the study of true properties and potential applications in high-performance electronics, detection, and emi...
SourceColumbia University School of Engineering and Applied Science·JournalNature Nanotechnology·DateApr 27, 2015
Picture this: Graphene brings 3-D holograms clearer and closer
Researchers at Griffith University and their international consortium have made significant progress in creating wide-angle and full-color 3D images using graphene. The sub-wavelength feature size allows for static holographic 3D images with a wide viewing angle, revolutionizing capabilities across various optical and electronic devices.
Researchers add a new wrinkle to cell culture
Brown University researchers developed new textured surfaces using graphene to better mimic the complex surroundings in which cells grow. The wrinkled surfaces influenced cell growth, with cells being elongated and aligned along the wrinkles, resembling a biologically relevant phenotype.
New class of 3-D-printed aerogels improve energy storage
Researchers from Lawrence Livermore National Laboratory have developed a new type of graphene aerogel using direct ink writing. The 3D printed aerogels exhibit high surface area, excellent electrical conductivity, and supercompressibility, making them suitable for applications such as energy storage and sensors.
'Holey' graphene for energy storage
Researchers at the University of California - San Diego have discovered a method to increase electric charge storage in graphene, a two-dimensional form of carbon. The 'holey' structure introduces charged defects that increase capacitance by three-fold, making it useful for quick bursts of energy.
Yale-NUS, NUS and UT Austin researchers establish theoretical framework for graphene physics
Researchers from Yale-NUS, NUS and UT Austin develop a theoretical framework to understand the elastic and electronic properties of graphene. The findings provide insights into creating hybrid materials with band gaps necessary for semiconductors.