Articles tagged with Graphene
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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...
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 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.
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.
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.
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.
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.
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...
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 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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.