Articles tagged with Graphene
The researchers found that the one-layer MoS2 device absorbs less light but produces seven times more photocurrent than the thicker seven-layer MoS2 device. This is attributed to quantum physics mechanisms, including electron tunneling and reduced recombination within the MoS2 layer.
Researchers at NYU Tandon School of Engineering have developed a method for growing high-quality monolayer tungsten disulfide, a material with electronic and optoelectronic applications. The technique boasts the highest carrier mobility values recorded thus far for this material.
Researchers have developed a method for creating crumpled metal-oxide films using graphene templates, resulting in enhanced properties such as higher charge-carrying capacity and increased reactivity. This process allows for the introduction of wrinkle patterns on metal oxides, overcoming previous limitations.
Scientists developed a technique to image THz photocurrents with nanoscale resolution, visualizing strongly compressed THz waves in a graphene photodetector. The imaging technique, called THz photocurrent nanoscopy, provides unprecedented possibilities for characterizing optoelectronic properties at THz frequencies.
Researchers at IBS discovered that hydrogenation of single-layer graphene proceeds rapidly over the entire surface, while few-layer graphene reacts slowly from the edges. Hydrogenation changes graphene's optical and electric properties. The study also found that defects or edges are necessary for the reaction to occur.
Researchers have developed tiny graphene radios that can transmit terahertz waves at speeds greater than one terabit per second, paving the way for an Internet of Nano-Things. These radios could enable short-range, high-speed communication and revolutionize industries such as healthcare and agriculture.
Researchers at Lomonosov Moscow State University have developed a bolometer device that measures electromagnetic radiation energy flow using graphene oxide. The device operates at room temperature without additional cooling, demonstrating the potential of graphene in practical applications.
Rice University scientists have discovered a new material that can store large amounts of hydrogen efficiently, making it suitable for next-generation green cars. The pillared boron nitride and graphene hybrid outperforms other materials in terms of surface area and recyclable properties.
Researchers have demonstrated graphene coating can protect glass from corrosion, preserving transparency and strength. The graphene coating prevents the adsorption of water on the glass surface, reducing dissolution of silicate structures.
Researchers create compact sources of coherent plasmons using van der Waals heterostructures, enabling compact optoelectronic circuits. The discovery has potential applications in signal transmission and tunable sources of terahertz radiation.
Researchers from University of Wisconsin-Madison have revealed a fabrication process for revolutionary transparent sensors, which can be used for brain imaging, electrophysiology, fluorescent microscopy, optical coherence tomography, and optogenetics. The technology has the potential to expand its applications into areas such as stroke...
Researchers have developed methods to control defects in graphene, which can lead to improved membranes for water desalination and energy storage. Simulations using the Reactive Force Field Method predict interactions between atoms and defects, enabling controlled defect formation.
Scientists at the University of Vienna have developed a new technique to measure isotopes in nanometer-sized areas of materials, revealing atomic-resolution electron microscopes can distinguish between different isotopes of carbon. This method can be extended to other two-dimensional materials and has the potential to improve synthesis.
Graphene reacts with formic acid in a water solution upon irradiation with visible light, producing hydrogenated graphene. This environmentally friendly method has potential applications in fields such as hydrogen storage and electronics.
Researchers have directly observed negative refraction for electrons passing across a boundary in graphene, mimicking light behavior. This finding could lead to the development of new types of electron switches and enable new experimental probes, such as on-chip electron microscopes.
Researchers at Rice University have found a new, wavy two-dimensional material called borophene that could be ideal for creating flexible electronic devices. The material has excellent conductivity and can stretch without losing its electronic properties.
Researchers from NIST and collaborators suggest a new DNA sequencer based on an electronic nanosensor that can detect tiny motions in single atoms. The device uses a thin film of molybdenum disulfide to store electric charge, allowing for fast and accurate sequencing of DNA bases.
Researchers at Argonne National Laboratory have developed a method to grow high-quality graphene on ultrananocrystalline diamond, reducing impurities and costs. The new process uses nickel to facilitate the growth of defect-free graphene, enabling its exploitation for advanced electronics and applications.
Researchers at the University of Manchester have developed a method to create artificial capillaries with atomic-scale precision, opening up new avenues for filtration, desalination, and gas separation. The technology uses graphene as a template to produce ultra-thin cavities with tailored properties.
Scientists have created graphene audio speakers for mobile devices with a sound quality comparable to existing systems. The new fabrication method uses ultra-thin graphene aerogels that don't vibrate and can be mass-produced for use in mobile devices.
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 FAU have made a significant break-through in producing defect-free graphene directly from graphite at low costs. This achievement paves the way for advancements in semi-conductor and sensor technologies.
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.
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.
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 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 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 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...
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.
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.
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.