Articles tagged with Graphene
Researchers at EPFL developed a microchip using graphene that can filter out unwanted radiation, ensuring data integrity. The discovery could lead to faster data uploads and improved wireless communication in the Terahertz frequency band.
A new approach to modifying 2D materials has led to an enhancement in the light absorption and stretchability of atomically thin materials. By engineering the two-dimensional material into three-dimensional crumpled structures, researchers achieved more than an order-of-magnitude enhancement in photoresponsivity.
Researchers have synthesized micrometer length-scale carbon chains, surpassing previous records by more than one order of magnitude. The discovery confirms the existence of ultra-long linear carbon chains, also known as carbyne, using various advanced spectroscopic and microscopic techniques.
A Kansas State University engineer has developed a paperlike battery electrode made from glass-ceramic that improves the performance of tools for space exploration and unmanned aerial vehicles. The electrode has high cycling efficiency and can function at low temperatures, making it suitable for long-duration missions.
Researchers at Juelich's Peter Gruenberg Institute have discovered that effective graphene doping is influenced by the choice of substrate material. The scientists found that nitrogen atoms in the interface layer can dope the lattice without destroying it, leading to promising results for future applications in micro- and nanoelectronics.
Researchers have synthesized graphene nanoribbons with perfect zigzagged edges, allowing for the creation of spin barriers and filters. This enables the design of ultra-energy-efficient transistors and spintronic devices with new components, including magnetic data storage devices.
Researchers at the Swiss Federal Laboratories for Materials Science and Technology (EMPA) have successfully synthesized graphene nanoribbons (GNR) with perfectly zigzagged edges using a perfected manufacturing process. This breakthrough enables the creation of spintronic devices that can efficiently switch on and off with minimal energ...
Researchers from Brown University found that repeatedly crumpling sheets of graphene can improve its water-repelling properties and electrochemical behavior. The process creates complex architectures with interesting patterns, including superhydrophobic surfaces and enhanced electrodes for batteries and fuel cells.
Researchers at Lawrence Livermore National Laboratory have discovered that certain metal oxides increase the capacity and cycling performance of lithium-ion batteries. The team created graphene-metal oxide nanocomposites and found two of them greatly improved reversible lithium storage capacity.
Graphene-based technologies enable ultra-small optical nanodevices by capturing light in record-small volumes. The researchers identified two types of plasmons - edge and sheet modes - with unique properties that can channel electromagnetic energy in one dimension.
Researchers have discovered a new way to manipulate plasmons on graphene and TMDs using circularly polarized light, enabling separation of particle streams without magnetic fields. This breakthrough could lead to novel electro-optical devices and applications in chip-scale optical isolation.
Graphene, known as 'black gold', has high surface area and can effectively purify contaminated water due to its unique structure. Using light, researchers can extract the graphene and contaminants, enabling easier purification.
The IBS team developed a graphene-semiconductor catalytic nanodiode that enables the detection of hot electrons on platinum nanoparticles in real time. This breakthrough allows researchers to study the electronic effect on catalytic activity and potentially design improved catalytic materials with lower costs.
Researchers have discovered that graphene can transmit high-frequency electrical signals without losing any energy. This breakthrough has significant implications for the development of next-generation electronic devices and ultra-sensitive biological sensors.
Researchers discovered graphene's exceptional lubricity, enabling frictionless movement between mechanical parts. The study suggests graphene could revolutionize coatings and electromechanical devices by reducing energy consumption and increasing service life.
Researchers create lattice-shaped cubes and truss structures using frozen water, ensuring retention of shape at room temperature. This breakthrough could make graphene commercially viable for electronics, medical devices, and more.
Scientists are studying graphene oxide to create bacteria-killing catheters and medical devices, reducing the need for antibiotics and speeding recovery times. Graphene oxide wraps around bacteria, puncturing its membrane and killing it, making it a potential alternative to traditional methods that are toxic to the environment.
A new one-atom-thick flat material made of silicon, boron, and nitrogen has been discovered by University of Kentucky physicist Madhu Menon. The material is extremely stable, a property lacking in many graphene alternatives, and can be fine-tuned to suit various applications.
Researchers at the University of Surrey have developed a new graphene material with enhanced light absorption, enabling applications such as 'smart wallpaper' that can generate electricity from waste light or heat. The technology uses nanotexturing to localise light into narrow spaces, increasing light absorption by 90%.
Researchers have discovered graphene's exceptional lubricity, which could drastically reduce energy loss in machines when used as a coating. The material's ability to slide smoothly across gold surfaces has significant implications for improving energy efficiency and extending equipment lifespan.
Electrons with 'no mass' in graphene become superconducting at 4 K, paving the way for ultrahigh-speed nano devices. The superconductivity is driven by electron transfer from calcium atoms to graphene sheets.
Scientists use soda-lime glass to create resilient and high-performing graphene, improving technologies from solar cells to touch screens. The sodium in the glass enhances electron density in the graphene, overcoming challenges in achieving this balance.
Researchers at Harvard have advanced graphene's understanding by observing electrons behaving like a fluid, defying classical physics expectations. The findings pave the way for novel thermoelectric devices and provide a model system to explore exotic phenomena.
Researchers found that graphene efficiently shields chemical interactions by covering surface defects, reducing reactivity. This shielding enables controlled selectivity and activity of supported metallic catalysts on carbon substrates.
Berkeley Lab scientists found that polycrystalline graphene is strong but has low toughness, a property necessary for structural reliability in applications. The researchers developed a statistical model to predict failure in the material, revealing its fracture resistance.
Researchers have discovered Landau levels on atomically flat surfaces without asymmetries, supporting the domain model for non-magnetic field generation. The study reveals unique properties of graphite-based carbon materials, such as graphene, for electronic devices and catalysis.
Researchers have successfully interfaced graphene with neurons, maintaining the integrity of these vital cells. The work may lead to the development of graphene-based electrodes that can safely be implanted in the brain, offering promise for restoring sensory functions in amputee or paralyzed patients.
Scientists develop custom-fit graphene cages to enhance silicon anode particles, improving charging capacity and stability. The approach could enable larger, cheaper, and more efficient batteries.
Researchers at Northwestern University discovered crumpled graphene balls as a promising lubricant additive that outperforms some commercial lubricants in reducing friction and wear on steel surfaces. The additive is self-dispersing without surfactants and has high performance sensitivity to concentration, making it more stable.
Scientists at the University of California, Riverside have created a way to observe electrons cooling off in just 30 quadrillionths of a second. This breakthrough could lead to more efficient devices for visual displays, solar cells, and optical communications.
A team of ICFO researchers has developed a novel hybrid system that combines graphene nanoelectromechanical systems (NEMS) with nitrogen-vacancy centers, enabling precise control over light emission. This breakthrough holds promise for various applications in nanophotonics and quantum optomechanics.
Rice researchers found that graphene oxide layers change their mechanical properties depending on the strain rate, making it brittle when pulled fast but more pliable under slow stress. This discovery can help build three-dimensional structures from two-dimensional materials for various applications.
Researchers at NIST have simulated a new concept for rapid, accurate gene sequencing by pulling DNA through a graphene nanopore and detecting changes in electrical current. The method could identify about 66 million bases per second with 90% accuracy, potentially revolutionizing forensics.
Scientists at Rice University and Montreal Polytechnic designed computer simulations to investigate the electromagnetic properties of graphene-boron nitride hybrids. The researchers found that these hybrid materials exhibit both electronic and magnetic properties, which could be useful in spintronic and nano-transistor applications.
Researchers at Tohoku University successfully demonstrated electronic connection between graphene nanoribbons by molecular assembly, showing that GNR electronic properties are directly extended through the interconnected structures. This breakthrough enables the development of high-performance, low-power-consumption electronics based o...
Researchers developed flexible microsupercapacitors that store and release energy like commercial supercapacitors, but are made in a room-temperature process. The technology has potential for cost-effective mass production.
Penn researchers develop ultra-thin aluminum oxide plates with nanoscale thickness, exhibiting remarkable mechanical strength and stiffness. These corrugated plates, like an egg carton on the nanoscale, can bend, twist, and recover their shape without additional support.
Researchers at Oak Ridge National Laboratory have developed a virtually perfect single layer of 'white graphene,' featuring high mechanical strength, thermal conductivity, and transparency. This breakthrough material could enable faster data transfers and improve the performance of electronic devices.
Researchers have developed a new hybrid structure that interacts strongly with electromagnetic radiation, enabling control over optical switches. The graphene-based material has the effect of focusing radiation into a smaller area than its wavelength.
Researchers at the University of Belgrade developed a graphene-based microphone with up to 15 dB higher sensitivity compared to commercial nickel-based microphones. The graphene membrane was grown on a nickel foil using chemical vapour deposition and showed potential for ultrasonic performance.
Scientists from Osaka University have observed the electron partitioning process in graphene for the first time, a world-first discovery that could lead to the development of electron interferometer devices. The study found that electron partitioning took place in the p-n junction of graphene in the Quantum Hall regime.
Scientists at the University of Tokyo have created an electrically-controllable valley current device that may pave the way to ultra-low-power computing devices. The device uses pure valley current, which is non-dissipative and does not produce heat, making it a promising alternative to traditional electronics.
Researchers have developed a new technique to trap light at the surface of graphene using laser pulses, enabling the steered light to be directed across the material's surface. This breakthrough has significant implications for advances in electronic products, such as sensors and miniaturized integrated circuits.
Researchers have designed graphene biosensors that can detect low concentrations of molecular substances without labels, improving the reliability of biochemical reactions. The sensors use surface plasmon resonance spectroscopy and are expected to revolutionize pharmaceutical biodetection, enabling the testing of small molecules.
Researchers have developed a new class of materials for organic electronics, featuring polymeric carbon nitrides with high charge mobility and long lifetimes. These materials show promise for building durable and efficient components for organic electronics applications.
Researchers at UTA are using a next-generation positron beam facility to investigate the properties of graphene, a versatile pure carbon material 200 times stronger than steel. The team is analyzing the microscopic interaction of graphene with other materials to translate its exceptional properties into real-life applications.
Lawrence Livermore National Laboratory scientists discovered that hydrogen-treated graphene nanofoam electrodes improve lithium ion battery performance by increasing capacity and facilitating easier lithium penetration. This breakthrough has real-world applications for electric vehicles and aerospace applications.
Researchers have developed a graphene-integrated device that detects heat signatures at room temperature without cryogenic cooling. This breakthrough could lead to a more versatile thermal sensor, potentially based on a single layer of graphene, simplifying manufacturing and reducing costs.
Researchers have developed ultrasensitive gas sensors using boron-doped graphene, detecting noxious gas molecules at extremely low concentrations. The sensors outperform current state-of-the-art sensors by six orders of magnitude, opening a path to high-performance detection of toxic gases and other molecules.
Scientists have developed a working laboratory demonstrator of a lithium-oxygen battery with very high energy density, exceeding 90% efficiency, and over 2000 recharges. The breakthrough relies on a highly porous graphene electrode and additives altering chemical reactions for improved stability and efficiency.
Researchers developed a graphene broadband detector that reacts rapidly to incident light and works at room temperature. The device can synchronize laser pulses with high accuracy, enabling precise measurements at room temperature.
Researchers at RIKEN have discovered that wrinkles in graphene can form a junction-like structure, changing its electronic properties from zero-gap conductor to semiconductor and back. By manipulating the carbon structure using scanning tunneling microscopy, they have opened up new possibilities for graphene engineering.
Researchers have identified a new way for molecules to move across graphene surfaces, allowing for faster and more controlled motion than previously observed. This discovery opens up possibilities for industrial applications in improved sensors and filters.
Researchers at Binghamton University have developed a method to pattern electrically conductive features into individual graphene oxide sheets with unprecedented spatial control. This enables the potential integration of graphene oxide into future technologies such as flexible electronics, solar cells, and biomedical instruments.
Graphene nanoribbons are grown on germanium crystals using chemical vapor deposition, providing a straightforward way to make semiconducting nanoscale circuits. The researchers confirmed the presence of graphene nanoribbons growing on the germanium crystal faces (1,1,1), (1,1,0) and (1,0,0).
Scientists at MIT have developed tiny graphene pores that exhibit diverse preferences for certain ions, similar to those found in biological channels. The findings have significant implications for the development of ion-specific membranes for environmental sensing and trace metal mining.
Researchers at ICFO have developed a new material combining graphene and two-dimensional crystals, achieving faster optical pulse detection than ten picoseconds. This breakthrough could lead to high-speed integrated communication systems.
Researchers at Umeå University and UC Berkeley have developed a method to synthesise novel molecular nanoribbons that resemble graphene but in molecular form. The nanoribbons exhibit ideal properties as electronic highways for organic solar cells, with dimensions smaller than 10-15 nanometres.
Researchers have developed a process to cover fragile perovskite layers with graphene, resulting in an ideal front contact. The graphene layer enhances transparency and reduces open-circuit voltage losses, increasing overall conversion efficiency.
Researchers use Raman spectroscopy to measure strain at each pixel on graphene's surface, enabling quick and accurate monitoring of defects. This breakthrough could help prevent defects caused by strain in high-quality graphene production.