Articles tagged with Graphene
The study reveals ballistic transport of electrons in graphene, enabling fast speed and low energy consumption. By mapping the 'reflectance' of the sample with ultrafast lasers, researchers observed electrons moving ballistically in real time.
Researchers at University at Buffalo have discovered a way to create strong and effective fuel cell catalysts that approach the performance of platinum. By adding hydrogen to the fabricating process, they were able to balance durability and efficiency, potentially making fuel cells more affordable and polluting-free.
The team created an ultraclean transfer process using a hybrid stamp, resulting in atomically clean interfaces and minimal strain. This breakthrough enables the commercialization of 2D material-based electronic devices with novel hybrid properties.
Researchers at Helmholtz-Zentrum Dresden-Rossendorf have developed tiny electromagnets made of ultra-thin carbon, graphene, using terahertz pulses. The graphene discs briefly turned into strong magnets, with magnetic fields in the range of 0.5 Tesla, and showed promise for developing future magnetic switches and storage devices.
Purdue researchers found that graphene's thermal conductivity is lower than previously thought due to four-phonon scattering. The team predicted the material's thermal conductivity at room temperature to be 1,300 W/(m K), which is less than diamond and raw graphite.
Magnetic graphene has been developed to induce and directly quantify spin splitting in two-dimensional materials. The technology offers a promising avenue for advancing the field of two-dimensional spintronics with applications for low-power electronics.
Researchers at the University of Manchester have discovered a way to accelerate proton transport through graphene using light. This breakthrough could lead to more efficient hydrogen fuel cells and solar water-splitting devices.
Physicists have directly observed the Kondo effect in a single artificial atom using a scanning tunnelling microscope. The team confirmed a decades-old prediction by validating their experimental data against theoretical models. This breakthrough paves the way for investigating exotic phenomena in magnetic wires.
Researchers from Tohoku University developed a special type of porous carbon sheet, graphene mesosponge sheet, which significantly improves the energy density and cycle stability in Li-O2 batteries. The GMS-sheet achieves high-performance standards with over 6300 milliampere-hours per gram.
Researchers have discovered a rare electronic state in five-layer graphene, exhibiting both unconventional magnetism and ferro-valleytricity. This multiferroic state could enable ultra-low-power, high-capacity data storage devices for classical and quantum computers.
Researchers have developed a high-performance magnesium-air primary battery using nitrogen-doped nanoporous graphene as air electrodes, offering superior performance to platinum cathode-based batteries. The battery's porous electrode structure facilitates air transport and prevents rapid corrosion of the Mg electrode.
Researchers have developed a metal nanocluster-based separator for lithium-sulfur batteries, accelerating electrochemical kinetics and improving capacity and cycling stability. The technology has the potential to increase the adoption of sustainable energy storage systems, including electric vehicles and renewable energy.
Researchers found that changing the stacking order of layers in transition metal dichalcogenide (TMD) semiconductors creates new optoelectronic devices with tailor-made properties. The study reveals dark excitons exclusively located in the top layer, which can be utilized for optical power switches in solar panels.
Researchers at NIST have created a new quantum ruler to measure and explore the properties of moiré quantum matter, which can generate magnetic fields, become superconductors, or turn into perfect insulators. The findings promise to shed light on how electrons in twisted graphene sheets give rise to new magnetic properties.
Researchers at Chalmers University of Technology have shown that graphene oxide nanoflakes can reduce the accumulation of misfolded amyloid peptides in yeast cells, which are similar to human neurons affected by Alzheimer's disease. This suggests that graphene oxide may hold great potential for treating neurodegenerative diseases.
Researchers add graphene to Bi-2223 superconductors, increasing critical current density and improving phase formation. The findings suggest potential applications in various fields, including power generation, transportation, and quantum computing.
Researchers at the University of Illinois have successfully tuned graphene surface friction using external electric fields, allowing for dynamic control of friction. This breakthrough could lead to reduced energy consumption in nano- and micro-electromechanical systems and mitigate wear and corrosion of sliding surfaces.
Researchers developed a graphene-based proton-exchange membrane that successfully suppresses the crossover phenomenon, allowing for high proton conductivity while blocking fuel molecule penetration. This study contributes to the development of advanced fuel cells as an alternative to hydrogen-type fuel cells.
A new device based on twisted double bilayer graphene has been developed, showing radical improvement in ultra-broadband photodetection. The device can detect light efficiently over a wide spectral range, from far-terahertz to near-infrared, with good internal quantum efficiency and scalability.
Researchers have developed a method to control the electronic character of graphene nanoribbons by making metal contacts using direct-write scanning tunneling microscopy. This precise technique allows for device functionality needed for transistor function, overcoming previous uncertainty with giant electrodes.
Researchers at Rice University have discovered a method to produce clean hydrogen gas from waste plastics using low-emissions technology. By utilizing rapid flash Joule heating, they can convert plastic waste into high-yield hydrogen and valuable graphene, which could offset the production costs of clean hydrogen.
GIST researchers found that nano-sized pits on AlN surfaces cause graphene degradation at higher temperatures, leading to GaN film exfoliation failure. The study's results demonstrate the importance of substrate chemical and topographic properties for successful remote epitaxy.
Researchers developed a novel approach called 'countercation engineering' to impart thermoresponsiveness to graphene-oxide nanosheets. The method involves synthesizing GO nanosheets with specific countercations, resulting in inherent thermoresponsive behavior without the need for thermoresponsive polymers.
The Graphene Flagship project has produced significant contributions to Europe's GDP and GVA, with an estimated return on investment of 14.5-fold. By 2030, the project aims to create over 81,000 jobs internationally.
Researchers at TU Wien developed a comprehensive computer model of realistic graphene structures, showing that the material's desired effects are stable even with defects. This means graphene can be used in quantum information technology and sensing without needing to be perfect.
Researchers at NUS have developed a technique to precisely control the alignment of supermoiêre lattices using golden rules, expanding tunable material properties for diverse applications. They fabricated 20 moiêre samples with accuracy better than 0.2 degrees.
Researchers have solved the long-standing puzzle of graphene's proton permeability using ultra-high spatial resolution measurements. Protons are strongly accelerated around nanoscale wrinkles, proving that perfect graphene crystals are permeable.
Researchers from The University of Warwick and The University of Manchester have solved the long-standing puzzle of why graphene is permeable to protons. Protons are strongly accelerated around nanoscale wrinkles in perfect graphene crystals, which could lead to more sustainable hydrogen production.
A new study proves that thermal fluctuations of freestanding graphene can produce useful work by charging storage capacitors. The system satisfies both the first and second laws of thermodynamics throughout the charging process.
A Princeton University-led team has captured the precise microscopic behavior of interacting electrons that give rise to insulating quantum phase in magic-angle twisted bilayer graphene. The study uses scanning tunneling microscopy and achieves pristine samples, allowing for high-resolution images of materials.
Researchers at Columbia University have developed a new fabrication technique to create devices with uniform twist angles and strain profiles in graphene. This allows for the systematic exploration of the material's properties and behavior, potentially leading to breakthroughs in quantum materials science.
A team of researchers has developed a new screening method to identify defective sensors, enabling the mass production of reliable graphene sensors for detecting toxins in water. The sensors can detect multiple contaminants simultaneously and provide early warning for contamination.
A team of researchers has successfully created a high-performance graphene-dielectric interface using a novel technique called UV-assisted atomic layer deposition. This breakthrough results in uniform atomic layer deposition without compromising graphene's properties, leading to improved electrical performance and reduced defects.
Researchers have created a novel water-adsorbent material, fullerene-pillared porous graphene (FPPG), with highly designable and controllable pore structures. FPPG exhibits the largest water vapor adsorption capacity at 40% relative humidity due to the production of uniform nanopores.
Researchers have developed ultra-thin and flexible 2D biochemical sensors with high sensitivity for detecting target substances, revolutionizing sensing technology. However, integrating these sensors into comprehensive systems for large-scale industrial manufacturing poses significant challenges.
Researchers at the University of Manchester's National Graphene Institute discover new physics in ancient graphite, finding a 2.5D Hofstadter’s butterfly effect that modifies both surface and bulk states.
A team of scientists from Chemnitz University of Technology has successfully synthesized two-dimensional lead layers using a novel method. The researchers were able to comprehensively describe the structures of these layers, which could become relevant in the development of novel electronic systems and quantum materials.
A team of researchers at the University of Washington has discovered a way to imbue bulk graphite with physical properties similar to those of graphene, a single-layer sheet. This breakthrough could unlock new approaches for studying unusual and exotic states of matter and bring them into everyday life.
Researchers developed an AI algorithm to predict the properties of new 2D materials with point defects, achieving 3.7 times greater accuracy than other machine learning algorithms. The model operates 1000 times faster than quantum mechanical computations and can handle multiple defects simultaneously.
Lancaster University researchers have developed a novel scanning thermal microscopy approach to directly measure the heat conductivity of two-dimensional materials. This breakthrough enables the creation of efficient waste heat scavengers generating cheap electricity, new compact fridges, and advanced optical and microwave sensors and ...
Researchers developed a new approach to create a wideband microwave absorption metamaterial using ultraviolet lasers, achieving high absorption performance and control over electrical and magnetic properties. The process enables mass production of complex structures without post-treatment.
Graphene materials have excellent electrical conductivity and physical, optical, thermal, and structural properties, making them suitable for sensor applications. Laser-scribed graphene (LSG) has been developed as a promising method for fabricating high-quality graphene with low energy consumption and environmental friendliness.
Researchers from Japan and Germany have created an eco-friendly light-emitting electrochemical cell using dendrimers combined with biomass-derived cellulose acetate as the electrolyte and a graphene electrode. The device has a long lifespan of over 1000 hours and is environmentally friendly.
Researchers at ETH Zurich have found a novel mechanism to produce nanoscale light sources by exploiting the antenna-like behavior of semiconductor materials. By varying the voltage and measuring the current through a tunnel junction, they discovered an exciton resonance that acts as an effective antenna, enabling efficient light emission.
Researchers have discovered anomalous quantum oscillations in twisted double bilayer graphene, which exhibit periodic behavior with the inverse of magnetic field. The oscillations are tunable by electric field and qualitatively reproduce calculations based on a phenomenological model.
A study by the Helmholtz-Zentrum Dresden-Rossendorf team demonstrates efficient conversion of high-frequency signals into visible light using graphene-based materials. The mechanism involves a thermal radiation process, and the conversion is ultrafast and tunable.
Researchers at Tohoku University have developed a technique to micro/nanofabricate silicon nitride thin devices using a femtosecond laser. The method enables precise machining and contaminant removal, opening doors for non-destructive cleaning of high-purity graphene. By applying this method to an ultra-thin atomic layer of graphene, t...
Researchers comprehensively reviewed recent discoveries in 2D material mechanics, highlighting elastic properties, failure, and interfacial behaviors. Computational advancements are crucial for understanding dynamic behaviors and practical applications.
Researchers at Nagoya University have developed a new technology to fabricate high-quality nanosheet films in about one minute. The method uses an automated film-forming process that produces neatly tiled monolayer films with no gaps between the nanosheets.
A team of scientists has found a way to directly manipulate the spin of electrons in 2D materials like graphene, a long-standing challenge. They used a novel experimental technique to study the properties of how electrons spin in these materials.
Scientists at Forschungszentrum Juelich develop bilayer graphene quantum dots with near-perfect symmetry, allowing for efficient long-distance coupling and robust spin-state detection. This breakthrough has significant implications for the realization of large-scale quantum computers.
A team of scientists has engineered a new method for building carbon nanocircuits with adaptable bridges, allowing for the fine-tuning of electronic properties and enabling potential applications in advanced electronics and sustainable energy. The breakthrough could also lead to the development of thermoelectric materials with signific...
Researchers propose a new bonding theory that illustrates how each boron atom satisfies the octet rule and how alternating σ bonds further stabilize the 2D sheet. The theory introduces a new form of resonance, allowing delocalization of σ electrons within the plane.
Researchers developed a graphene 'tattoo' implant that senses irregular heart rhythms and delivers electrical stimulation without constraining the heart's natural motions. The device is optically transparent, allowing for external light to record and stimulate the heart through the device.
Researchers at Chalmers University of Technology have discovered a two-dimensional magnetic material that can work in room temperature. This breakthrough paves the way for energy-efficient and faster data storage and processing in computers and mobile devices.
A UK-based graphene company has formed a $1 billion deal with Quazar Investment Company in the UAE to commercialize graphene-based technologies, aiming to reduce CO2 emissions. The partnership will develop and produce premium, environmentally-friendly products using advanced materials.
Researchers from the University of Manchester have discovered that graphene displays a remarkably strong response to magnetic fields, reaching above 100% in standard permanent magnets. This is a record magnetoresistivity among all known materials, attributed to the presence of Dirac fermions in high-mobility graphene.
Researchers observed quantum interference effect in inter-layer Coulomb drag for the first time, revealing significant deviations from classical drag resistance. The discovery relies on superimposing inter-layer diffusion paths and impurity potential scatterings from intermediate insulating layers.
Researchers from Chinese Academy of Sciences have doubled lithium storage capacity in hard carbon anodes by exploring lithiation boundary parameters. The study reveals the dual effect of lithium intercalation and reversible lithium film as key to high-reversible capacities.
A partnership between Professor Rahul Nair and Carlsberg aims to develop more sustainable plant-based food production through graphene-enhanced membrane technology. The project will explore how these membranes can be used for selective removal of sugars, alcohol, and acids in plant-based diets.