Articles tagged with Graphene
Researchers at IBS developed a two-terminal tunnelling random access memory (TRAM) with highly reliable performance, long retention time, and flexibility. The device stores data by keeping electrons on its graphene layer, enabling flexible and stretchable applications for wearable smartphones, eye cameras, and biomedical devices.
Researchers have developed a porous, highly compressive 3D graphene material suitable for bone implants, demonstrating its potential as a replacement for titanium. The technique uses spark plasma sintering to weld nanoscale graphene sheets, producing materials with high mechanical strength and biocompatibility.
Researchers at Iowa State University have successfully treated inkjet-printed graphene with lasers, improving its electrical conductivity without damaging fragile printing surfaces. The breakthrough technology enables the creation of low-cost and disposable graphene-based electrochemical electrodes for various applications.
Researchers at Rutgers University have discovered an easy way to produce high-quality graphene using microwaves. This breakthrough has significant implications for the production of flexible electronics, energy storage devices, and catalysts.
A team of researchers has successfully developed a device that can control the momentum of electrons in graphene, opening up new possibilities for low-power electronics. The device uses bilayer graphene and can create metallic wires with colored electrons that travel unhindered along the wires with minimal resistance.
Researchers at Penn State have developed a new method to synthesize two-dimensional gallium nitride using graphene encapsulation, opening up new avenues of research in 2D materials. The process produces ultra-thin sheets of gallium nitride with improved properties for applications in electronics and optoelectronics.
Researchers discovered a procedure to restore defective graphene oxide structures, leading to the formation of highly crystalline graphene films with excellent band-like transport. The method involves applying high-temperature reduction treatment in an ethanol environment, resulting in a carrier mobility of ~210 cm2/Vs.
Researchers discovered that the shape and dimensions of graphene nano-bubbles provide information on its elastic strength and interaction with substrates. The balloons can be created intentionally to make tiny pressure machines capable of withstanding enormous pressures.
Researchers developed stretchable micro-supercapacitors using graphene ribbons to store energy in wearable devices. The design allows for stretching without compromising electrochemical performance, enabling applications in smart T-shirts and soft robots.
Researchers from TU Wien, Aachen, and Manchester successfully created artificial atoms in graphene by confining electrons to small spaces. This innovation enables the preservation of arbitrary superpositions for a long time, ideal properties for quantum computers.
Graphene nanoribbons exhibit properties similar to those of biological materials when in solution, forming folds and loops. The researchers found that their rigidity increases as oxide molecules are removed, making them suitable for designing and fabricating GNR-biomimetic interfaces.
Researchers propose a graphene-based spaser that can detect small amounts of explosives and toxic chemicals using surface plasmons. The device's construction involves a graphene layer, enabling subwavelength light focusing and increasing sensitivity beyond conventional optical devices.
Researchers at Kumamoto University have developed a novel, pot-shaped carbon nanomaterial with a deeper orifice than any previously produced hollow carbon nanostructure. The material's unique characteristic enables it to gradually release substances contained within, making it suitable for applications such as drug delivery systems.
Scientists have successfully fabricated monolayer graphene nanoribbons with well-defined zigzag edges, exhibiting high electron mobility and clean energy band gaps. This breakthrough could enable large-scale processing of high-quality graphene nanoribbons for spintronic devices.
The European Science Foundation (ESF) and the Graphene Flagship consortium enabled nine young researchers to attend the EuroScience Open Forum (ESOF). The trip included a visit to the National Graphene Institute, showcasing opportunities for collaboration and networking in graphene research. Young researchers play a crucial role in adv...
Researchers at Washington University in St. Louis have created a new approach to purify water using graphene oxide and bacteria-produced cellulose. The bi-layered biofoam is light, strong, and flexible, allowing for efficient evaporation of contaminated water.
Researchers at Rice University have found that ultra-flat circuits made from 2D materials exhibit distinct electronic characteristics compared to traditional components. The discovery has significant implications for the development of new electronics designs, including photovoltaic applications and transistors.
Researchers developed an ultrasensitive chemical sensor using N-doped graphene and Raman spectroscopy, detecting trace amounts of molecules in solutions. The technique significantly enhances the Raman signal, allowing for detection of organic molecules at very low concentrations.
Researchers at MIT develop a method to stack hundreds of nanoscale layers, producing strong and conductive composites. The technique, inspired by pastry-making, enables the creation of materials with tailored properties for various applications.
A research team has demonstrated that energy-filtered transmission electron microscopy (EFTEM) can be used to image individual electron orbits within atoms. This technique allows for penetration down to the subatomic level, opening up new possibilities for the study of atomic structures.
Researchers have developed a novel graphene photodetector that can efficiently detect low-energy photons using vertical heterostructures. The device harnesses the photo-thermionic effect to extract hot electrons from graphene, enabling fast and efficient optoelectronic applications.
Researchers at Rice University have developed 'rivet graphene', a two-dimensional carbon material with enhanced strength and conductivity. The new material uses nanotubes to reinforce its structure, making it suitable for flexible and transparent electronics.
Scientists have developed graphene-infused packaging that reduces water vapor permeability by a million fold, allowing for longer product lifespans. The material was shown to extend the lifetime of an organic light-emitting diode from less than 30 minutes to over 1 year.
Dr. Rodney S. Ruoff has been recognized with the SGL Carbon Award for his pioneering discoveries in carbon science, including the understanding of nanostructures and 2D materials. His work has greatly accelerated industrial developments in graphene-based materials and electrical energy storage systems.
University of Illinois researchers introduce nanoscale ripples in graphene using rod-shaped bacteria, creating a new material with unique electronic properties. The resulting material exhibits altered conductivity at right angles to the original direction.
University of Illinois researchers have demonstrated doping-induced tunable wetting and adhesion of graphene, revealing its unique properties. The findings show that graphene can exhibit switchable hydrophobic and hydrophilic behavior, enabling the creation of reusable, self-cleaning sensors with potential energy savings.
Researchers at UC Riverside created a compact, fast voltage-controlled oscillator device using TaS2-BN-Graphene materials. The new technology could become an ultralow power alternative to silicon-based devices in various applications.
A team of Engineers and Physicists from the University of Exeter has discovered that GraphExeter can substantially improve the effectiveness of large, flat, flexible lighting. Using GraphExeter, they increased the brightness of flexible lights by up to almost 50% and made them 30% more efficient than existing examples.
Researchers at ICFO developed a hybrid photodetector that surpasses existing performance features, operating in visible, NIR, and SWIR ranges. The device integrates an active colloidal quantum dot photodiode with a graphene phototransistor, enabling high quantum efficiency and fast photoresponse.
Researchers developed an electrical graphene chip capable of detecting DNA mutations at high resolution. The technology could be used in various medical applications such as blood-based tests for early cancer screening and real-time detection of viral and microbial sequences.
Researchers at Tohoku University have synthesized wafer-scale and high-yield suspended graphene nanoribbons using a bottom-up approach, enabling the integration of over 1 million ribbons with high yield.
A Korean research team developed a graphene-based transparent electrode structure, achieving high efficiency and flexibility in flexible OLEDs. The new device architecture maximizes the efficiency of graphene-based OLEDs by inducing a synergistic collaboration between high- and low-index layers.
Researchers at Argonne National Laboratory have developed a graphene-nanodiamond lubricant that reduces friction to nearly zero, allowing for increased efficiency and reduced wear in industries such as wind turbines and computer hard disks. The technology has shown promise in reducing friction by six times and wear by ten thousand time...
A team of international researchers has explained the peculiar behavior of electrons in graphene when passing through narrow constrictions. The results show that the electric current is not continuous, but quantized, exhibiting characteristic steps.
Researchers at the University of Manchester have developed a composite material that combines graphene with natural rubber and polyurethane, resulting in increased strength and elasticity by up to 50%. The added graphene enhances the materials' ability to stretch and withstand force without breaking.
Scientists have successfully demonstrated size quantization of charge carriers in graphene nanoconstrictions, revealing key details relevant to future electronic devices. The study utilized high-quality samples and low temperatures to accurately measure the effects, closely following theoretical predictions.
Scientists have developed a new type of graphene-based transistor that enables record low power consumption and high clock speeds. The device uses bilayer graphene, which exhibits a unique electronic structure allowing for efficient tunneling switches.
Researchers at the University of Washington have discovered a way to harness light energy by exploiting quantum-level interactions in graphene. By aligning graphene with boron-nitride, they created a superlattice that enables efficient optoelectronics, allowing one photon to transfer its energy to multiple electrons.
Researchers have discovered a new approach to modulating synapses using graphene flakes, which buffer activity without acting on the brain or neurosurgery. The method is selective for excitatory synapses and could be used to target certain diseases with non-invasive treatments.
Researchers developed a graphene nanoflake-based film for efficient cooling of electronics, achieving over 76% improvement in heat transfer efficiency. The functionalization layer constrains cross-plane scattering of low-frequency phonons, enhancing in-plane heat conduction and reducing contact resistance.
University of Illinois researchers have created a simple and scalable graphene patterning technique using stencil masks fabricated via a laser cutter. This approach enables rapid design iterations and pattern replications, promoting cleaner quality graphene patterns without polymeric transfer layers or organic solvents.
Atomic magnets have been created in a layer of graphene using the absorption of hydrogen atoms. By manipulating these atoms, it is possible to produce magnetic graphene with atomic precision.
Researchers at Northwestern University have developed a new process to exfoliate atomically thin phosphorene flakes with high yield and minimal degradation. The method uses deoxygenated water as an environmentally benign solvent, resulting in superior material quality and scalable fabrication.
Researchers have stabilised ultra-long carbyne chains with over 6,400 carbon atoms, surpassing previous records. The new method uses double-walled carbon nanotubes to create the stable chains, which could lead to new nano-electronic applications.
Researchers at MIT and Harvard University have successfully fabricated nanoscrolls made from graphene oxide flakes. The scrolls exhibit mechanical properties similar to graphene and can be tailored to trap specific molecules and pollutants.
Researchers developed a new composite catalyst using nitrogen-rich graphene dotted with copper nanoparticles that can convert carbon dioxide to ethylene efficiently and selectively. The study showed a selectivity of 79 percent for ethylene production, significantly higher than other approaches.
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 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.
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.
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 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.