Articles tagged with Graphene
A research team at AIMR has developed a new bottom-up fabrication method that produces defect-free graphene nanoribbons with periodic zigzag-edge regions. The method controls GNR growth direction and length distribution, enabling the potential for self-assembling single graphene devices at desired locations.
Researchers discovered that adding fluorine to graphene increases friction on a nanoscale, despite making surfaces water-repellent. The team found that electronic roughness caused by fluorine atoms introduces energy peaks and valleys, leading to increased friction.
Researchers at Rice University discover that phosphorus exhibits stable semiconducting properties in its 2-D form, even with defects. This property makes it a promising candidate for solar cells and electronics applications.
A team of European researchers has successfully synthesized germanene, a 2D material with impressive electrical and optical properties. The material was synthesized by depositing individual germanium atoms onto a gold substrate under high temperatures and in an ultra-high vacuum, revealing its characteristic honeycomb structure.
Scientists have successfully demonstrated how combining hexagonal boron nitride and graphene can create perfect crystals capable of being used in ultra-high frequency devices. The research paves the way for innovative applications in high-frequency electronics.
Scientists create doped graphene nanoribbons with nitrogen atoms, enabling directional electronic current flow and solving scaling issues. The development allows for the transfer of ultra-narrow graphene ribbons onto non-conductive materials, paving the way for future graphene-based electronics.
Researchers at Penn State have developed a new route to making graphene through intercalation, allowing for the creation of single-layer sheets without damaging the layers. This breakthrough could lead to easier and more efficient production of graphene for various industrial applications.
Researchers developed a prototype detector that sees an extraordinary broad band of wavelengths, including terahertz waves invisible to the human eye. The detector uses graphene and is more than a million times faster than existing room temperature detectors.
Researchers at UC Santa Barbara have developed a highly sensitive biosensor using molybdenum disulfide, offering improved scalability and mass production capabilities. The material's wide band gap enables accurate readings with reduced leakage current.
Researchers have developed graphene-infused rubber bands that can measure breathing, heart rate, and movement, enabling affordable remote healthcare monitoring. The technology has the potential to revolutionize remote healthcare, particularly in developing countries where access to medical care is limited.
Researchers discovered graphene devices have different electronic properties at edges and centers. Edge conduction was found to be p-type, while the center exhibited n-type electron conduction. These findings offer insights into developing graphene nanoribbon devices and studying edge photocurrents.
Scientists at the University of Illinois have discovered a single-layer sheet of molybdenum disulfide (MoS2) that can sequence DNA more accurately and quickly than existing materials. The new material outperforms graphene, which had limitations due to DNA sticking to it.
Researchers have developed a simple method to detect contaminants on atom-thin graphene using terahertz spectroscopy. The technique involves placing the graphene on a layer of indium phosphide, which emits terahertz waves when excited by a laser pulse, allowing for non-contact detection and mapping of changes in electrical conductivity.
Scientists have discovered a way to create hemp-derived carbon nanosheets that can store as much energy as graphene, the current gold standard for supercapacitors. These nanosheets offer a promising alternative for more affordable and sustainable energy storage.
Graphene-based planar micro-supercapacitors provide a promising solution for on-chip energy storage with high power density and fast charging capabilities. The devices can deliver a superior cycling lifetime of millions of cycles, making them suitable for applications that require high power over a short timeframe.
Researchers at TUM are developing an artificial retina made of graphene, which converts light into electrical impulses for the brain. The material's excellent biocompatibility and electronic properties provide a promising solution to existing retina implants.
Researchers from Monash University discovered that graphene oxide sheets can change structure to become liquid crystal droplets spontaneously. This opens up possibilities for its use in drug delivery and disease detection, potentially paving the way for new methods of detecting toxins.
A team of UC Riverside engineers will characterize, analyze, and synthesize van der Waals materials for novel electronic devices, optical detectors, and energy conversion systems. The research aims to produce new material synthesis techniques and enable practical applications in ultra-thin film materials.
Researchers at MIT have found a way to control graphene's electrical conductivity using extremely short light pulses. By modulating electron concentration, they can alter graphene's photoconductive properties from semiconductor-like to metallike behavior.
Researchers at Rice University have developed a tough and ultralight foam using atomic-scale materials, with properties including high strain handling and bounce-back ability. The foam can be tailored to any size and shape, and its lightweight density is 400 times less than graphite.
Researchers from University of Pennsylvania use cutting-edge microscope to study graphene nanoribbons, revealing how atomic geometry affects electrical conductivity. The study provides crucial insights for designing graphene-based integrated circuits and computer chips.
Researchers at Linköping University have demonstrated that geckos and spiders lose grip due to the effect of heat on van der Waals forces. This phenomenon has significant industrial benefits, particularly in the production of graphene, where detachment from the substrate is crucial.
Columbia researchers have observed the fractional quantum Hall effect in bilayer graphene, demonstrating a controllable phase transition by applying electric fields. The team's breakthrough allows for tuning of the charge density and identification of exotic non-abelian states with potential for quantum computation.
A team of researchers at the University of Wisconsin-Milwaukee has developed a method to produce graphene ribbons with widths as low as three nanometers, transforming them into semiconductors with tunable electrical properties. This breakthrough could lead to the creation of nano-devices and atomic-scale components made from graphene.
Researchers at Perimeter Institute discovered novel states in graphene, a 1-atom-thick material, which exhibits the fractional quantum Hall effect. The discovery opens doors to studying new phenomena and potential applications in quantum computing.
A domestic research team created a carbon material without artificial defects, maintaining graphene's characteristics, and developed a simpler production process. The new method can mass-produce high-quality graphene substitutes for solar cells and semiconductor chips.
Researchers at the University of Houston have identified a semiconducting material called graphene nitride as one of the thinnest possible piezoelectric materials. The material is only one atomic layer thick and can be stacked on top of itself without losing its piezoelectric properties.
The team created a crystal that can form a paper-like sheet just three atoms thick and exhibits remarkable ability to behave like a switch. It can be mechanically pulled and pushed, back and forth, between two different atomic structures.
Researchers at Umea University and Humboldt University found that graphite oxide layers increase in distance when exposed to water due to varying thickness. The discovery helps design new membrane types with adjustable permeation properties.
The Graphene Flagship is doubling in size with 66 new partners added through a €9 million competitive call, increasing the consortium's scope and capabilities. This move reflects growing interest from economic actors in graphene technology.
Harvard-led researchers successfully measured the collective mass of 'massless' electrons in motion in graphene, shedding light on fundamental kinetic properties. The discovery has implications for designing more sophisticated plasmonic devices with graphene and miniaturizing electronic circuitry.
The University of Surrey has established a graphene centre to advance technologies such as electronic devices, supercapacitors, and solar cells through collaborative research with industry partners. The Centre will utilize the ATI's Photo Thermal deposition technology to produce high-quality graphene for various industrial applications.
Scientists from MIPT, RAS, Kurchatov Institute and Kintech Lab Ltd have developed a new method to synthesize nickel-carbon compounds using electron irradiation. The study reveals potential electronic, magnetic and optic features of these compounds.
Researchers at the University of Manchester have discovered that combining graphene with boron nitride creates an additional band gap, allowing for more control over its electrical conductivity. This phenomenon, known as the Hofstadter butterfly, results in strongly contorted replicas of the original graphene spectrum.
Scientists at the University of Vienna observe random diffusion of a butterfly-shaped atomic defect in graphene, revealing a random walk through the crystal. The study uses high-resolution electron microscopy to track the defect's migration over time.
A new supersonic spray system produces a smooth, defect-free graphene layer by dispersing and restructuring graphene flakes. This method enables the production of high-quality graphene on various substrates without post-treatment or introducing defects.
Researchers successfully trapped and controlled light using graphene-based optical antennas, demonstrating the fundamental principles of conventional optics. The discovery paves the way for the development of compact and faster photonic devices and circuits, which could revolutionize signal processing and computing.
Researchers at MIT have developed a method to produce graphene directly on materials like large sheets of glass, enabling scalable manufacturing. This breakthrough could lead to advances in display screens, solar cells, and other electronic devices.
Scientists at UC Riverside developed a nanometer scale ruthenium oxide anchored graphene foam architecture that improves supercapacitors' performance, delivering two times more energy and power. The design shows promising properties for future energy storage applications.
Berkeley Lab researchers have developed a technique to modify graphene boron nitride heterostructures using visible light, preserving high electron mobility. This method enables p–n junctions and flexible doping profiles without sacrificing material quality.
Researchers from the University of Pennsylvania have combined graphene with a painkiller receptor to create an artificial chemical sensor. The device uses electrical responses instead of biochemical ones, allowing it to be read out by a computer. This technology has potential applications in drug development and various diagnostic tests.
Researchers have found that graphene's thermal conductivity increases with the number of layers, but still falls short of idealized values. The team is exploring novel ways to support graphene, including three-dimensional interconnected foam structures and hexagonal boron nitride.
Scientists at AIMR successfully synthesized three-dimensional (3D) nanoporous graphene with preserved two-dimensional Dirac electronic characters. The material exhibits exceptional electron mobility and a massless Dirac cone system, making it an attractive alternative to silicon-based devices.
Researchers at UCSB demonstrate a rapid synthesis technique for large-area Bernal (or AB) stacked bilayer graphene films, exhibiting electron mobility as high as 3450 cm2/(V•s). The growth of high-quality and large-area bilayer graphene films is achieved with controlled stacking order required for low-power digital electronics.
Scientists at the University of Arizona have developed a way to control graphene's crystal structure using an electric field. This breakthrough could lead to the creation of faster and more versatile transistors, which would enable faster computing and new applications for graphene in microelectronics.
Researchers measured graphene's fracture toughness for the first time, finding it to be significantly lower than its intrinsic strength. The study highlights the importance of fabricating high-quality graphene sheets without defects.
Researchers from Rice University and Georgia Tech measured graphene's fracture toughness for the first time, finding it to be somewhat brittle. The study highlights the importance of fabricating high-quality graphene sheets without defects to ensure its structural applications.
Researchers found graphene oxide nanoparticles more stable in groundwater and unstable in surface waters. The material's mobility in water has significant implications for its potential environmental impact. The study highlights the need for further research on the stability and transport of these engineered nanomaterials.
Scientists successfully create 'heterostructures' with novel functionalities, such as tunnelling transistors and solar cells. By controlling the relative orientation between graphene and boron nitride, researchers can reconstruct the crystal structure of graphene and open a band-gap.
Researchers explore the capabilities of graphene-based metamaterials for various neurosurgical applications, including cancer treatment, neuroregeneration, and functional neurosurgery. Graphene's unique properties make it a promising material for developing new technologies in neurosurgery.
Researchers at Monash University have modelled a carbon-based spaser that could enable the creation of ultra-thin mobile phones printed on clothing. The device offers advantages such as high temperatures resistance, eco-friendliness, and flexibility, paving the way for innovative applications in telecommunications.
Researchers created a new ultracapacitor by combining graphene flakes with single-walled carbon nanotubes, resulting in three times higher specific capacitance. The hybrid structure's low costs and small size make it suitable for portable electronics and hybrid electric vehicles.
Scientists at Helmholtz-Zentrum Dresden-Rossendorf and Vienna University of Technology created ultra-thin membranes that allow highly charged ions to pass through with little energy loss. This discovery has significant implications for developing novel electronic components made of graphene.
The team of researchers produced a stable porous membrane that is thinner than a nanometre, consisting of two layers of graphene on which tiny pores were etched. The membrane can permeate tiny molecules and may be used for waterproof clothing, water filtration, or gas separation.
Researchers have successfully observed the quantum phase transition of a superconductor-to-metal type in a graphene-based hybrid system. The system, consisting of tin nanodisks on a graphene substrate, exhibits a sharp drop in temperature at which the spatial phase coherence is destroyed solely by quantum fluctuations.
NTNU researchers have discovered that by tuning a small strain on single nanowires, they can become more effective in LEDs and solar cells. The discovery enables the creation of highly effective solar cells that produce a higher electric power.
Researchers have discovered conditions under which graphene nanoribbons can function as electronic switches. The study reveals that the transport gap, a critical factor for switch functionality, is inversely proportional to the ribbon's width and independent of crystallographic orientation.
Researchers at Rice University and Nanyang Technological University have developed a scalable CVD process for producing one-atom-thick layers of 2D molybdenum diselenide, a highly sought semiconductor. The new method offers improved electronic properties compared to similar materials like graphene.
Researchers at Rice University have developed a new hybrid material by combining carbon nanotubes with graphene, resulting in improved electrical and mechanical properties. The 'rebar graphene' technique enables large, flexible, conductive sheets of graphene to be manipulated more easily, making it a potential replacement for indium ti...
Scientists have successfully fabricated a photosensor using single layers of molybdenum disulfide (MoS2), which converts light into electricity at an extremely efficient rate. The material's large energy gap enables it to achieve high on/off ratios, making it suitable for future electronic devices.