Articles tagged with Graphene
Scientists at ORNL and NCSU report growing graphene nanoribbons without a metal substrate, enabling controlled creation of interfaces with different electronic properties. This breakthrough addresses limitations in graphene's application in digital electronics.
Scientists at NC State develop technique to convert positively charged rGO into negatively charged material, enabling the creation of rGO-based transistors. The method uses high-powered laser pulses to disrupt chemical groups, creating a p-n junction that's crucial for transistor applications.
Scientists develop self-assembled organic molecular lattices with controlled geometry and atomic precision on top of graphene, inducing periodic potentials and unprecedented electrical, magnetic, piezoelectric, and optical functionalities. The approach allows for pre-programming and adjustment of the induced potentials.
Scientists at IBS discover a platform to functionalize SLG and BLG, enabling the creation of 2D materials with new characteristics. Functionalized graphene can be applied to various devices, such as sensors and supercapacitors.
Researchers created graphene-based neural probes to record brain activity in high resolution while maintaining a high signal-to-noise ratio. The devices successfully detected small electrical signals associated with brain activities, such as sleep and visual light stimulation, without inducing inflammation or toxicity.
Researchers have discovered a systematic approach to inducing large-amplitude vibrations in graphene models, leading to increased conductivity. The findings offer a valuable theoretical basis for future experimental work, opening up new avenues for smart materials and all-optical networks.
Researchers have developed a technique to control terahertz waves using graphene, enabling potential applications in telecommunications and medical imaging. This discovery could lead to faster data transfer speeds and improved security in communications, as well as non-invasive detection of biological molecules for medical diagnosis.
Scientists have reinvented abandoned heat energy converter technology using graphene, making it seven times more efficient. The new prototype can convert heat into electricity with an electronic efficiency of 9.8%, a significant improvement over traditional methods.
Researchers developed a new method to capture and analyze individual cells from a small sample of blood using graphene oxide sheets. The system demonstrates high efficiency in capturing specific immune cells that are markers for certain cancers, with an estimated production cost of $5 per device.
Rice University researchers simulate a nanoscale sandwich of graphene and magnesium oxide, offering unique properties for molecular sensing, catalysis, and bio-imaging. The hybrid material has tunable band gaps and optical properties, making it suitable for various applications.
Researchers discovered a new type of magnet in three layers of graphene, allowing for the observation of electronic interactions. By reducing imperfections, they enabled the development of coordinated electronic interactions, which is essential for creating electronic devices using graphene.
Researchers at Rice University have developed a new material called rebar graphene, which can be shaped and has exceptional conductivity. The material supports over 3,000 times its own weight without deforming, making it suitable for various applications.
Graphene, a carbon material one atom thick, has been made more commercially viable thanks to the humble soybean. The novel GraphAir technology eliminates the need for high-controlled environments and expensive equipment, reducing production time and cost.
Scientists used a new spectroscopic platform to study graphene's electronic properties, revealing a unique energy structure with two cones resembling a sandglass. This discovery could promote future research on stable quantum measurements for new 2D electronics.
Researchers at UNIST have successfully fabricated the world's thinnest oxide semiconductor, just one atom thick, using atomic layer deposition on graphene. This breakthrough material has a wide band gap and high optical transparency, opening up new possibilities for flexible electronic devices.
Researchers at Ulsan National Institute of Science and Technology create a new technique for enhancing Schottky Diode performance. By inserting a graphene layer, they overcome the contact resistance problem that has remained unsolved for 50 years.
Researchers at the University of Pennsylvania have successfully grown a single layer of tungsten ditelluride, a unique two-dimensional material with predicted topological electronic states. This breakthrough could lead to advancements in quantum computing, as these materials may enable intrinsically error-tolerant forms of computation.
Researchers at Rice University and Kazan Federal University have found a way to extract radioactivity from water using oxidatively modified carbon (OMC) material. The OMC is highly efficient at absorbing radioactive metal cations, including cesium and strontium, making it a promising solution for purifying contaminated water.
A recent study demonstrates the integration of atomically precise graphene nanoribbons (APGNRs) onto nonmetallic silicon substrates, overcoming a significant challenge in chip manufacturing. The 'bottom-up' approach allows for atomic-level control and uniform electronic properties.
Researchers at the University of Cambridge have found a way to trigger graphene's innate ability to act as a superconductor by coupling it with praseodymium cerium copper oxide (PCCO). This breakthrough enhances graphene's potential for industries such as healthcare and electronics. The study suggests that graphene could be used to cre...
Researchers at MIT have designed a strong and lightweight material by compressing graphene flakes into sponge-like configurations, achieving 10 times the strength of steel while maintaining a low density of just 5%. The new material's unusual geometric configuration is key to its exceptional properties.
Researchers found that adding cone-like structures between graphene and nanotubes enhances heat dissipation by reducing the number of heptagons. This could lead to improved performance in next-generation nano-electronics.
Researchers at Vienna University of Technology demonstrated that graphene can transport extremely high currents when impacted by highly charged xenon ions. The material's rapid electronic response allows it to withstand extreme currents without damage, making it a promising candidate for ultra-fast electronics applications.
Researchers at Michigan Tech created a new way to synthesize sodium-embedded carbon nanowalls, which have two orders of magnitude higher conductivity than three-dimensional graphene. The material also retains high capacity after 5,000 charge/discharge cycles, making it ideal for supercapacitors and energy devices.
Researchers attribute graphene's high conductivity to accelerating effect of electrons interacting with photons in a weak magnetic field. The study uses pseudo-quantum electrodynamics to model electron-photon interactions across space-time dimensions.
Researchers at the University of Illinois Chicago have developed a graphene system that can differentiate between cancerous and normal brain cells, detecting hyperactivity in single interfaced cells. This technique uses Raman spectroscopy to pinpoint changes in atomic vibration energy, allowing for early cancer diagnosis.
Scientists have developed a graphene-based imaging system that can visualize tiny electric fields in liquids, allowing for precise imaging of electrical signaling networks in the heart and brain. The new method could aid in diagnosing diseases, developing lab-on-a-chip devices, and studying optoelectronics.
Researchers successfully separate graphene from metal growth substrates using a novel transfer method. The study reveals the role of graphene nanoribbon edges in weakening the pre-elongated O-O bond at the graphene-Cu interface.
Researchers from UNIST and Rutgers University successfully produced high-quality graphene using microwaves, eliminating oxygen exposure that degrades properties. The new technique may solve long-standing manufacturing challenges, enabling affordable mass commercialization of graphene.
Researchers have created extremely sensitive sensors using graphene-infused silly putty, which can measure breathing, pulse, and blood pressure with unprecedented sensitivity. The material shows promise for applications in medical devices and diagnostics, offering a potentially inexpensive alternative to traditional sensors.
Researchers created graphene-infused G-putty, a highly sensitive material that detects heart rates through skin and individual spider footsteps. The unique substance surpasses conventional strain sensors in sensitivity, with potential applications in various fields.
Friction on graphene increases with continued sliding and is higher than in multi-layered graphene or graphite. Scientists attribute this to evolving contact quality and real contact area.
Researchers have deciphered the electronic properties of transition metal dichalcogenides, a promising alternative to graphene for next-generation transistors. The discovery sheds light on how electrons behave in these materials, offering hope for future applications.
Scientists at IBS & KAIST create a new method for producing graphene using laser annealing technology, which can separate complex compounds like SiC into ultrathin elements of carbon and silicon. The technique reaches the same results as traditional methods but at lower temperatures, making it more efficient and scalable.
Researchers at Rice University have developed a new way to dissipate heat in next-generation microelectronic devices by using bumpy surfaces with graphene. The interface between gallium nitride semiconductors and diamond heat sinks was improved, allowing phonons to disperse more efficiently. This improvement can lead to better reliabil...
Researchers at DGIST have successfully developed a graphene microwave photodetector that can detect 100,000 times smaller light energy than existing detectors. The device achieved this by creating a clean electronic system, allowing electrons to move far distances without residues or dispersion.
Using computer simulations, researchers at MIT and others have made significant strides in understanding the way graphene behaves when something slides along its surface. The findings reveal that the quality of contact between two surfaces is more important than the true contact area in explaining a material's frictional behavior.
Researchers at Technical University of Denmark have demonstrated efficient absorption enhancement at a wavelength of 2 micrometers by graphene plasmons. This breakthrough brings graphene into the regime of telecommunication applications.
Researchers at Rice University discovered that molybdenum diselenide's tensile strength can be significantly reduced by flaws as small as one missing atom. The material's brittle nature may limit its use in next-generation technologies.
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.
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 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 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 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 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 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.