Articles tagged with Graphene
Scientists have successfully manipulated individual dislocations in bilayer graphene using advanced electron microscopy and nanoscale robot arms. This breakthrough confirms long-standing theories of defect interactions and opens up new possibilities for studying plasticity.
The research demonstrates a novel device structure that allows for unprecedented control over the angular orientation in twisted-layer devices. The team used graphene/boron-nitride heterostructures to show that the energy gap observed in graphene is tunable and can be turned on or off by changing the orientation between the layers.
Researchers have created new 'switches' that respond to light using combined light-sensitive molecules with layers of graphene and other 2D materials. This technology could lead to programmable applications in smart electronics, sensors, and flexible devices.
Scientists at UC Berkeley have discovered a long-sought carbon structure called schwarzite, which has unique electronic, magnetic, and optical properties. The negatively curved schwarzites were formed inside zeolite pores and have potential applications in supercapacitors, battery electrodes, and gas storage.
Rice University researchers discovered that graphene reinforced with carbon nanotubes 'rebar' can withstand twice the stress of pristine graphene, making it more suitable for flexible electronics. The study demonstrated how rebar helps bridge cracks in graphene under strain.
Researchers created a machine learning technique to categorize different molecules based on the nano-sized shapes they form. The approach could help materials scientists identify suitable precursor molecules for synthesizing target nanomaterials.
Researchers have explained 'electron-hole reverse drag' and exciton formation using a multiband approach, revealing the bandgap's role in dual-layer graphene structures. This new understanding opens possibilities for ultra-low dissipation future electronics and room-temperature superfluid flow.
Researchers at Rice and Northwestern universities discovered how different lattice arrangements of borophene can combine into new crystal-like forms, exhibiting metallic properties and unique electronic structure. The findings suggest potential applications in flexible and transparent electronic interconnects, electrodes, and displays.
Researchers found that folding graphene significantly enhances its mechanical properties, leading to increased stiffness, strength, and toughness in polymer composites. The folded structure can sustain larger bending forces compared to stacked layers, making it an efficient strategy for incorporating large-area monolayer graphene films.
Researchers discovered graphene's 'transparency' in controlling water evaporation by adjusting wetting angles. The coating accelerates evaporation on hydrophobic surfaces and suppresses it on hydrophilic ones, leading to changes in the evaporation rate.
Graphene's lifetime limitation has been overcome by connecting it to other atomic layers. The tri-layer material increases the lifetime of excited electrons in graphene by several hundred times, enabling high efficiency in solar cells. This breakthrough could lead to the development of ultrathin and flexible solar cells.
A team at the University of California San Diego has developed a wireless chip that can detect genetic mutations, including single nucleotide polymorphisms (SNPs), in real-time. The chip is at least 1,000 times more sensitive than current technology and could lead to cheaper, faster, and portable biosensors for early disease detection.
Scientists at the University of Vienna have successfully manipulated individual silicon impurity atoms in graphene with atomic precision, recording nearly 300 controlled jumps. This achievement enables potential high-density data storage and demonstrates the control of single atoms in two-dimensional materials.
Scientists at University of Illinois discovered that water molecules can be compressed by 3% under a high-gradient electric field, which may be useful for precise filtering of biomolecules. The compression occurs because the charges on water molecules align with the electric field, and the membrane's thinness focuses the force.
NIST researchers have simulated simple logic operations in a liquid medium by trapping ions in graphene, enabling potential applications in water filtration and sensor technology. The ion-trapping approach requires minimal material and can conform to custom shapes.
The new photodetector designed by UCLA has major improvements in speed, sensitivity and spectrum range, making it suitable for a wider range of applications including thermal imaging, environmental sensing and medical diagnosis.
University of Tsukuba researchers developed a method to balance catalyst activity and stability in acidic liquids using graphene coatings. The approach resulted in nanoparticles with high durability and similar catalytic activity to expensive platinum-based catalysts.
Researchers at Brown University discovered that graphene forms sharp, saw-tooth kinks called quantum flexoelectric crinkles, which produce intense electrical charges. These charges can be used to direct nanoscale self-assembly and manipulate biomolecules like DNA.
Researchers at Chalmers University of Technology have developed a graphene assembled film with over 60% higher thermal conductivity than graphite film. The graphene film's high thermal conductivity is attributed to its large grain size, high flatness, and weak interlayer binding energy.
Graphene's high strength is accompanied by ultra-low bending rigidity, leading to rich morphology control. The scientists review the mechanics of defects in graphene and outline challenges for nanomechanics research.
Researchers from Yunnan University investigate recent research progress on QDs/GR composites, highlighting their industrial preparation methods and commercial applications. The synergistic effects of the QDs/GR composite materials enhance their optical gain, charge separation, and carrier mobility.
Researchers explain Auger recombination in graphene as prohibited by classical laws due to quantum uncertainty. They found conditions for low probability and propose viable graphene-based lasers using low-energy carriers.
Researchers at Drexel University have found MXene to be the strongest material of its kind, with a high elastic modulus. The material's durability and strength make it suitable for applications such as composite materials, protective coatings, and membranes.
Researchers at UC San Diego developed a technique to engineer graphene electrodes with low impedance and transparency. This allows for simultaneous recording of neuronal activity and high-quality imaging of brain cell activity in transgenic mice. The technology brings graphene electrodes closer to being adapted into next-generation bra...
Researchers create 3D laser-induced graphene (LIG) foam with excellent performance in lithium-ion capacitors, exceeding graphite's theoretical limit. The process is easily scaled and scalable to complex shapes using a custom-built fiber lasing system.
Researchers at SISSA observed an increase in nerve cell activity on graphene carpets, attributed to ion 'trapping' that modulates its composition. This phenomenon enhances neuronal excitability, with specific effects depending on the graphene's support material.
Scientists have developed a new anode material for lithium-ion batteries that can store more energy and charge faster. The hybrid material combines tin oxide nanoparticles with antimony on a graphene base, improving stability and conductivity.
Researchers have developed a new ultrafast and highly sensitive bolometer that can work at room temperature, paving the way for new astronomical observatories, heat sensors, and quantum sensing devices. The device uses graphene to amplify absorption of electromagnetic radiation, enabling precise measurements in picoseconds.
Researchers have developed a method to analyze electron flow in graphene nanoribbons using a simplified physics model. This approach uses a matching method to calculate transmission properties of electrons through the junction.
Researchers have developed a new carbon-based material that significantly outperforms current drying agents, with twice the absorbent capacity of industry standard silica gel. The super desiccant can discharge moisture at energy-saving low temperatures, making it suitable for frequent reuse and reducing costs.
Researchers at Berkeley Lab's Molecular Foundry created graphene-layered material with exotic electron behavior that can be used for next-generation computing applications. The material exhibits tiny swirling patterns where layers meet, which could be controlled to tap into spin-orbitronics in ultrathin materials.
Professor Rodney S. Ruoff has been awarded the prestigious James C. McGroddy Prize for New Materials by the American Physical Society for his pioneering contributions to graphene and its derivatives. The award recognizes his achievements in scalable synthesis, materials science, and applications of graphene.
Researchers at TU Dresden have created a novel approach to synthesize nanographenes and graphene nanoribbons using ball mills, eliminating the need for solvents and reducing environmental impact. This breakthrough could pave the way for more efficient and sustainable production of electronic and solar energy materials.
Researchers have developed a novel cryogenic near-field optical microscope to study graphene plasmons at variable temperatures. They discovered that compact nanolight can travel along the surface of graphene without unwanted scattering, opening up new applications in sensors, imaging, and signal processing.
Researchers created a technology that boosts graphene's non-linear optical effects using electrical fields, leading to faster and more reliable ultra-broad bandwidth transfers. This breakthrough could enable larger volumes of information to be processed or transmitted.
Scientists at University of California San Diego School of Medicine developed a method to control human heart cells growing in a dish on command by shining light and varying its intensity. The graphene surface converts light into electricity, providing a more realistic environment than standard laboratory dishes.
A Columbia University-led team developed a technique to manipulate graphene's electrical conductivity with compression, bringing it closer to being a viable semiconductor. By applying pressure, researchers increased the band gap in BN-graphene structures, effectively blocking electricity flow and creating a stronger switch.
Researchers from Kazan University and Russian Academy of Sciences proved that graphene maintains the causality principle in its conductivity. The study found that graphene's real and imaginary parts satisfy Kramers-Kronig relations precisely.
Researchers from ICFO and European partners cracked the code on graphene's behavior after absorbing light, revealing why conductivity increases or decreases. This breakthrough enables more efficient design and development of graphene-based light detection technology.
Researchers at the Center for Multidimensional Carbon Materials successfully measured and controlled the temperature of individual graphene bubbles using a single laser beam. The study found that the temperature oscillates with bubble height, allowing for efficient heating of specific regions within the bubble.
The Argonne team discovered that sulfur diffusion breaks down nanodiamonds into onion-like carbon, creating a superlubricant with friction 10 times lower than some nonstick coatings. The new lubricant can be used in various industries, including wind turbines and magnetic disc drives.
Scientists at the University of Tsukuba have created an electrode based on 'holey' graphene that efficiently catalyzes the hydrogen evolution reaction in acidic electrolyte, making it cheaper and more effective. The new system outperforms regular non-holey graphene electrodes in acid conditions.
Scientists have developed high-strength, super-tough carbon sheets by chemically stitching together platelets of graphitic carbon at low temperatures. The material's mechanical properties exceed those of current carbon fiber composites, offering potential cost savings and improved performance for various applications.
Researchers embedded graphene in a photonic crystal to enhance its light-absorbing capabilities. By varying the external temperature, they can tune the material's optical characteristics, leading to potential applications in light sensors and ultra-fast lasers.
Physicists at MIPT and their colleagues revealed the mechanisms leading to photocurrent in graphene under terahertz radiation. The study sets the stage for developing high-sensitivity terahertz detectors, essential for medical diagnostics, wireless communications, and security systems.
Researchers at the University of Illinois have developed a tunable infrared filter made from graphene, allowing soldiers to change the frequency of a filter simply by controlled mechanical deformation. This breakthrough enables real-time chemical detection and identification, overcoming limitations of conventional filters.
A new composite material made with graphene is stronger and more durable than traditional concrete, while also significantly reducing its carbon footprint. The innovation has the potential to modernize the construction industry worldwide.
Researchers at ICFO have achieved the ultimate level of light confinement using graphene, creating ultra-small optical switches and sensors. By sending infra-red light through devices, they observed how plasmons propagated in between metal and graphene, demonstrating control of light guided in channels smaller than one nanometer.
Researchers at ICFO have successfully confined light to a space one atom thick, setting a new record. They used graphene and other 2D materials to create an optical device that can control light in channels smaller than one nanometer.
Researchers found that graphene's Poisson ratio, which determines material capability to shrink or extend in transverse dimension, varies depending on the applied tensile force. This discovery could help create new materials with required exotic properties and improve existing technologies.
A Japanese research team has developed an automated robot that greatly speeds up the collection and assembly of 2D crystals to form van der Waals heterostructures. The robot can detect 400 graphene flakes an hour, stacking four layers in just a few minutes with minimal human input.
Scientists have developed a method to modify graphene without destroying it, creating a stable structure called 'polymer carpets'. When exposed to light, these carpets generate current, making them suitable for use in solar batteries and flexible electronics.
Researchers at MIT have developed a continuous manufacturing process to produce long strips of high-quality graphene. The team's results are the first demonstration of an industrial, scalable method for manufacturing high-quality graphene suitable for membrane applications.
Researchers at Chalmers University of Technology have discovered that a layer of vertical graphene flakes can form a protective surface that kills bacteria, preventing infections and eliminating the need for antibiotic treatment. The graphene flakes are sharp enough to slice apart bacteria without harming human cells.
A team of physicists has successfully imaged individual impurity atoms in graphene ribbons using atomic force microscopy. The technique allowed them to identify boron and nitrogen atoms, expanding graphene's properties for applications like transistors and circuits.
Researchers investigated the oxidative unzipping mechanism of MWCNTs, revealing an intercalation-driven process. The study showed that controlling the KMnO4/MWCNT ratio and reaction time allows for the production of GNRs with varying properties, from multi-layered graphenic nanoribbons to single-layered GONRs.
Researchers from MIPT have created biosensor chips based on copper and graphene oxide, achieving unmatched sensitivity. The innovative design enables compact devices compatible with microelectronics technology, opening up new avenues for bio-sensing applications.
Researchers have developed highly integrated graphene blackbody emitters with a fast response time of ~100 ps, outperforming previous emitters. The emitters' properties are controlled by the number of graphene layers and can be used for real-time optical communication.
Kansai researchers successfully synthesized hexa-peri-hexabenzo[7]helicene, the first helically twisted chiral graphene. The discovery offers promising applications in nanomechanics and has unique electronic structure properties.
Scientists at Rice University have developed a method to produce strong, lightweight graphite pellets without the need for high-temperature processing. The pellets exhibit good conductivity and stability in various conditions, making them suitable for applications such as conducting cables and electrodes.