Articles tagged with Graphene
Researchers at Peter the Great St.Petersburg Polytechnic University develop a theory of transients in graphene, exploring its unique properties that deviate from expected behavior. The study's findings have significant implications for investigation of heat transport and other nonequilibrium thermodynamic processes in graphene.
Researchers quantify tiny height differences and detect different atom arrangements in silicene using low-temperature atomic force microscopy. The unevenness, known as buckling, influences the material's electronic properties, unlike graphene.
Physicists have discovered that an existing technique is more accurate in explaining the 'critical temperature' of superconductivity in pure, single-layer graphene. This finding has significant implications for understanding graphene's diverse structural properties and potentially aiding the development of new technologies.
Scientists develop an all-optical switch operating in the femtosecond range with low energy consumption, breaking the trade-off between switching speed and energy. The device uses a nanoscale waveguide based on plasmonics and graphene to control optical signals.
Researchers at Weizmann Institute of Science have visualized electrons flowing through graphene, mimicking the flow of liquid through a pipe. This behavior has important implications for creating new electronic devices with reduced resistance.
Researchers successfully synthesized a graphene nanostructure with magnetic properties, fulfilling a decades-old prediction. The structure's high exchange coupling energy enables stable spin-based logic operations at room temperature.
The Graphene Flagship has launched eleven Spearhead Projects to catalyse commercialisation of graphene-enabled products. These projects combine innovative research with industrial ambitions, aiming to boost technology readiness levels and bring graphene-based technologies to market.
Researchers have successfully converted large-area bilayer graphene into the thinnest possible diamond-like material, F-diamane, under moderate pressure and temperature conditions. This flexible and strong material has potential for industrial applications in nano-optics and nanoelectronics.
Researchers developed graphene-integrated composites to improve strength and properties of fibre-reinforced composites. These materials can withstand extreme temperatures, humidity, and lightning strikes, making them suitable for aerospace and automotive industries.
The study reveals that electrochemical reactions between water and oxygen can control the physical properties of graphene and other two-dimensional materials. This discovery has significant implications for developing flexible displays, high-speed transistors, and next-generation batteries.
Researchers developed a graphene-titania composite that degrades up to 70% more atmospheric nitrogen oxides than standard titania in real pollutant tests. The composite can be coated on materials like concrete to passively remove pollutants from the air, promoting a healthier environment.
Researchers from Kiel and Copenhagen developed a new computational model to simulate the detailed behavior of electrons in graphene nanoribbons. The model predicts that correlation effects due to electron repulsion have a dramatic influence on local energy spectrum, enabling precise control over electronic properties.
Researchers developed a high-efficiency and low-cost preparation method of 2D materials using intermediate-assisted grinding exfoliation. The technology overcomes mass production challenges, enabling the commercialization of 2D materials for various applications.
Researchers at Columbia University have developed a new way to control the properties of two-dimensional materials by adjusting the twist angle between them. By creating multiple moiré patterns in a graphene-boron nitride device, they were able to study the effects of coexisting moiré superlattices on a layer of graphene.
New research reveals that multilayer graphene behaves differently when bent a little versus a lot, with two distinct regimes of stiffness and flexibility identified. This discovery has implications for the creation of machines that can interact with cells or biological material.
Researchers developed a scalable method to grow orthorhombic molybdenum oxide (α-MoO3) nanosheets on graphene substrates using van der Waals epitaxial growth. The nanosheets retain bulk-like structural and electrical properties even at thicknesses of 2-3 layers, making them suitable for optoelectronic devices and power electronics.
The SPRING project aims to develop all-graphene platforms using spins for information processing, potentially enabling faster and power-efficient components.
A new study reveals twisted bilayer graphene can exhibit superconducting and insulating regions, increasing its usefulness for electronic devices. The discovery is a significant advance in the emerging field of Twistronics, enabling the creation of materials with high-temperature superconductivity.
Researchers from ICFO have observed a variety of previously unseen superconducting and correlated states in magic-angle graphene, including an entirely new set of magnetic and topological states. The discovery has led to a record-high superconducting transition temperature above 3 kelvin.
Scientists at DOE/Ames National Laboratory have found a broad diffraction pattern in high-quality graphene samples, indicating defect-free and uniform layers of atoms. This discovery enables the reliable identification of structurally perfect graphene, a crucial step towards optimizing its properties for various applications.
Researchers developed a method to adopt kirigami architectures for graphene-based sensors, achieving strain-insensitivity up to 240% uniaxial strain. The design redistributes stress concentrations, enabling directional mechanical attributes.
The graphene nanomechanical bolometer is the fastest and most sensitive in its class, detecting nearly every color of light at high speeds. It has wide-spread use potential in astronomy, medicine, industrial manufacturing, and more.
Researchers have created a device that controls spin currents using a double layer of graphene on top of tungsten disulphide. The new technique enables the use of spin currents in transistors, which could be more energy-efficient than traditional electronics.
Researchers at the University of Wyoming have developed an automated system to align single-wall carbon nanotubes, producing higher alignment and precise control over filtration flow rate. This breakthrough enables various tech applications, including electronics and optics.
Northwestern University researchers have successfully integrated graphene and borophene into 2D heterostructures, enabling the creation of ultrahigh density devices. The achievement demonstrates a significant step towards creating integrated circuits from these nanomaterials.
Scientists at Aalto University and the University of Vienna create hybrid material combining graphene and single-walled carbon nanotubes, achieving higher conductivity than either component alone. The van der Waals interaction between graphene and nanotubes enhances charge-tunneling, leading to improved electrical properties.
A graphene filter developed by Rice University scientists can capture and sanitize airborne pathogens, including bacteria, fungi, and viruses. The filter uses Joule heating to kill trapped microbes and their toxic byproducts, potentially reducing hospital infections.
Researchers from SUTD discovered a new theory that describes thermionic emission in graphene, improving the accuracy of models used to design devices. The new approach overcomes limitations of existing Dirac cone approximation, enabling universal descriptions of graphene-based devices across different temperatures and energy regimes.
The Graphene Flagship predicts high potential for graphene-enabled batteries, supercapacitors, and sustainable energy generation. Short-term applications include materials sector innovations, while mid-term prospects focus on energy and opto-electronics advancements.
Researchers at Ohio State University have made a discovery that could provide new insights into how superconductors might move energy more efficiently. They found that graphene can become a superconductor when twisted to an angle of around 0.9 degrees, which is less than previously thought.
The integration of graphene and 2D materials with silicon technology promises to overcome current challenges and enhance device component function and performance. This could lead to breakthroughs in computational systems, non-computational applications, such as cameras and sensors, and even push performance gains in memory and data st...
Researchers have successfully grown elongated hexagon-shaped flakes of borophene on a silver substrate, overcoming a major hurdle in its production. The discovery could enable the creation of atom-width conductive wires for nanoelectronics devices.
Researchers found that graphene shares similar mechanical properties with 3D graphite and has a significantly thicker thickness than believed. Graphene's true thickness was determined to be around 0.34 nm, revealing its 3D nature.
Researchers at Georgia Institute of Technology developed platinum-graphene fuel cell catalysts with unprecedented catalytic activity and longevity. The new catalysts outperformed nanoparticle platinum in dissociation energy, suggesting potentially longer-lasting catalytic systems.
Researchers at the University of Groningen have successfully created a two-dimensional spin transistor in graphene, which uses charge-to-spin conversion to generate spin currents. The spin transistor can be switched on and off using an electric field, enabling the creation of all-electrical spin circuits.
A research team has found a way to overcome the limitations of graphene-based molecular devices, creating structures that are both electrically and mechanically stable at room temperature. The breakthrough, published in Nature Nanotechnology, uses a combination of covalent binding and large ۆ-conjugated head groups to achieve stability.
Researchers have developed a new class of flexible and transparent wearable devices that can measure multiple human vital signs, including heart rate, respiration rate, and blood pulse oxygenation. The devices are conformable to the skin, operate battery-free wirelessly, and provide continuous measurements during activity.
Researchers found that graphene bilayer conductivity varies based on the states of carbon atoms at their edges, particularly in relation to quantum spin Hall and Rashba spin-orbit coupling. This property could be useful for spintronics applications, including quantum computing.
Researchers from Chalmers University of Technology have demonstrated a graphene-based detector that can detect faint cosmic signals with high sensitivity and large bandwidth. The device's low power requirements make it ideal for future space missions, enabling 3D imaging of the universe.
Researchers at University of Göttingen developed a new method using graphene to measure the distance of single molecules from the sheet, allowing for high accuracy in optical resolution. The technique enabled the measurement of single lipid bilayers with nanometre resolution, advancing super-resolution microscopy.
Researchers developed graphene-based films that protect skin from mosquitoes by impeding their ability to detect molecular attractants. These wearable patches offer a potential solution for preventing insect bites without conferring mechanical puncture resistance.
A new graphene-based film has shown promise in blocking mosquito bites by interfering with their ability to sense skin and sweat. The dry film provides a strong mechanical barrier that prevents mosquitoes from landing and biting.
A new model of heat transfer in crystals has been developed by a team of Russian scientists from Peter the Great St. Petersburg Polytechnic University. The model describes the distribution of heat in ultrapure crystals at the atomic level, revealing certain directions along which heat rays distribute major energy.
Researchers have discovered that graphene-lined clothing could be an effective mosquito barrier. The ultra-thin yet strong material acts as a physical barrier that mosquitoes are unable to bite through, while also blocking chemical signals that trigger their urge to bite.
A research team at Tokyo Institute of Technology successfully synthesized atomically flat oxidized borophene sheets through a simple solution-based method. The resulting material exhibits anisotropic conducting behavior, with different conductivity types depending on current flow direction.
Researchers at Northwestern University discovered that mixing strong and weak graphene oxide flakes can create stronger paper, improving the material's durability. The finding sheds light on a general problem in materials engineering and has implications for other two-dimensional materials.
Researchers at Rice University have created a method to modify hexagonal-boron nitride (h-BN) by attaching carbon chains, making it easier to bond with polymers and other materials. This modification also makes the material more dispersible in organic solvents.
Researchers developed a method to measure all phonons in graphene nanostructures, opening new possibilities for material design and optimization. This breakthrough technique uses high-resolution electron spectroscopy inside an electron microscope, resolving spatial and momentum vibrations.
Researchers studied H2SO4-GIC to monitor stage transitions and observed a difference in mechanisms between natural flake graphite-based and HOPG-based GICs. The findings advance the field of graphene and have potential applications in Li-ion batteries, hydrogen fuel cells, and single-layer graphene production.
University of Illinois researchers discovered that tiny defects formed during fabrication can be used to direct molecules into membrane pores. Their findings could lead to devices that quickly sequence DNA for personalized medicine, increasing capture throughput by several orders of magnitude.
Researchers at KAIST have developed a novel synthesis method for single-crystalline hexagonal graphene quantum dots, which emit stable blue light. The team successfully created homogeneous nucleation of graphene quantum dots through a single-phase reaction.
A team of engineers at Lehigh University has successfully created a catalyst that uses sunlight to split water molecules, producing hydrogen. This process is performed at room temperature and under ambient pressure, making it a promising route towards a renewable energy-based economy.
Researchers from Russia and Japan have developed a new stabilization method for unique 2D copper oxide materials using graphene, allowing them to exhibit stable rectangular atomic structures. This breakthrough has significant implications for the development of spintronics devices, as these materials show promise in this field.
Researchers found that twisted bilayer graphene's moiré pattern creates a state where electrons organize into stripes, leading to robust properties. The discovery provides new evidence for the link between graphene and high-temperature superconductors.
New experiments reveal that magic-angle twisted graphene's superconductivity arises from strong interactions between electrons, yielding insights into the rules governing superconductivity. The discovery provides a fundamentally different mechanism for superconductivity compared to traditional materials.
Researchers at Stanford University have discovered a novel form of magnetism, called orbital ferromagnetism, generated by carefully stacking and rotating honeycomb-shaped carbon lattices. This finding could prove useful for certain applications, such as quantum computing.
In acoustoelectronics, surface acoustic waves generate electric currents with conventional and unconventional components. The Valley Acoustoelectric Effect creates a warping-based current and a Hall current with distinct characteristics.
Researchers developed a graphene device that can switch between superconducting and insulating states, allowing for the study of exotic quantum physics. The device, made of three atomically thin layers of graphene, exhibits unique properties such as high-temperature superconductivity and Mott insulator behavior.
Researchers find that introducing a controlled amount of fluorine enhances the growth rate of 2D materials like graphene, h-BN, and WS2. This allows for faster production of high-quality films, reducing synthesis time by up to 70%. The study demonstrates a promising approach to controlling the growth of 2D materials.
Scientists have developed a method to produce graphene materials using bacteria, overcoming a major hurdle in adopting this revolutionary nanomaterial. The bacterially-produced graphene material retains its amazing properties, making it suitable for innovative technologies such as field-effect transistor biosensors and conductive inks.