Articles tagged with Graphene
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Researchers have successfully synthesized a new type of carbon allotrope called holey graphyne, which has semiconductor properties and can be used in various applications. The material was created using a bottom-up approach and consists of alternately linked benzene rings and C≡C bonds.
Researchers have developed a new type of separation membrane that can separate hydrogen from methane at speeds 100 times faster than conventional membranes. The graphene-wrapped zeolite membrane achieves a high separation factor of 245, making it suitable for energy-saving separation technologies in various industries.
Researchers studied twisted trilayer graphene, discovering a phase diagram that decouples into product states of graphene and bilayer graphene. The system exhibits unique insulating and semi-metallic phases in the presence of an electric field.
Researchers successfully measured the wettability of graphene and other 2D materials using VSFG, a surface-selective tool that connects macroscopic and molecular-level properties. The study found that graphene's 'wetting transparency' diminishes with increasing layers, becoming hydrophobic at a certain point.
A team of researchers from Delft University of Technology has captured the sound of a single bacterium using a graphene membrane. The graphene drum detected tiny oscillations caused by the bacteria's flagella, which can be converted into a 'soundtrack' and listened to. This technology has enormous implications for detecting antibiotic ...
Scientists have identified magic-angle twisted bilayer graphene as a promising material for high-temperature superconductivity. Researchers found that nematic order in MATBG originates from the interference between fluctuations of a novel degree-of-freedom combining valley and spin degrees.
Researchers have developed an eco-friendly and reusable solution for removing toxic synthetic dyes from wastewater using nanocomposite-based hydrogels. The new material, made from carboxymethyl cellulose (CMC) and graphene oxide, demonstrates high adsorption capacities and retains its effectiveness even after multiple cycles of use.
The researchers successfully synthesized π-extended nanographene carbon nanosolenoid (CNS) material with continuous spiral graphene planes, matching the structure of Riemann surface. CNS exhibited special photoluminescence and magnetic properties, including red-shifted emission band and large thermal hysteresis.
Rice University researchers have developed a customizing method for producing doped graphene with tailored structures and electronic states. The doping process adds elements to the 2D carbon matrix, making it suitable for use in nanodevices such as fuel cells and batteries.
Researchers successfully grow high-quality single-crystal graphene sheets on insulating supports using a copper-catalyzed decomposition method. The resulting graphene exhibits excellent electronic performance due to its high crystallinity and minimal surface folds.
Researchers have developed a new method to synthesize large defectless graphene crystals using carbon monoxide under ambient pressure. The process benefits from self-limiting conditions, resulting in purer graphene with faster growth rates and better crystal formation.
A team of scientists has discovered a way to bend electrons without applying a magnetic field by using circular polarized light in bilayer graphene. This breakthrough enables new sensing applications and opens up possibilities for infrared and terahertz sensing, medical imaging, and security applications.
Researchers at Rice University have developed a new type of electronics using undulating graphene, which creates mini channels that produce detectable magnetic fields. This technology has the potential to facilitate nanoscale optical devices and valleytronics applications, such as converging lenses and collimators.
Researchers found that laser-induced reduction of graphene oxide can produce high-quality graphene by reducing defects and improving lattice structure. At high temperatures, oxidation occurs near defects but is balanced by annealing in the center of the sheet, resulting in well-structured material.
A new paradigm in atmospheric gas sensing has been achieved using a graphene sensor integrated with carbon molecular sieve functionality. The sensor demonstrates selective gas detection, including ammonia, at room temperature with a fast response time of seconds.
Researchers have found direct evidence of strong electron correlation in ABC trilayer graphene, a two-dimensional material that can switch between metal, insulator, and superconductor states. The discovery provides insight into the underlying physics driving these switchable materials.
The project aims to find efficient ways to use graphene particles from domestic coal wastes in Fused Deposition Modeling (FDM) 3D printing, increasing the carbon content of filaments and developing new materials. This technology could lead to a more sustainable future by reducing greenhouse gas emissions.
A study by researchers at Pusan National University has investigated the relationship between surface structures and nanoscale friction in multi-layered CVD graphene. They found that only the top-most layer of graphene was twisted with respect to the rest, affecting layer-dependent nanoscale friction.
Researchers have confirmed a novel quantum topological material for ultra-low energy electronics, reducing energy consumption by a factor of four. The study reveals the potential of zigzag-Xene-nanoribbons to make topological transistors with robust edge states and low threshold voltage.
The researchers developed a power suit made of a layered carbon composite material that works as an energy-storing supercapacitor-battery hybrid device. This material could increase an electric car's range by 25% and boost its power, giving it the extra push it needs to go from zero to 60 mph in 3 seconds.
Researchers have demonstrated control of graphene's relaxation time, allowing for novel functionalities in devices such as light detectors and modulators. This work paves the way for the development of ultrafast optical devices with potential applications in photonics and telecommunications.
A team of researchers at NGI and NPL demonstrated that slightly twisted 2D transition metal dichalcogenides (TMDs) display room-temperature ferroelectricity. This characteristic can be used to build multi-functional optoelectronic devices with built-in memory functions on a nanometre length scale.
Researchers have developed wearable sensors that collect data for clinicians while limiting patient discomfort. The sensors use flexible electronics to monitor patients' physical motions and chemical signals in their sweat, skin, and more to help diagnose or inform treatment plans.
A novel graphene-based field effect transistors (FETs) device can detect four different synthetic and natural opioids at once in wastewater. The device uses aptamers to trap opioid metabolites, enabling real-time monitoring with high geographical resolution and low cost.
Researchers have developed a novel approach to detect non-uniformities in 2D materials, enabling the creation of new medical sensors that can detect cancer treatment drugs like doxorubicin. The sensor material combines multiple signals from graphene and molybdenum disulfide to accurately measure analyte concentration.
Researchers at Osaka University have successfully accelerated energetic ions using graphene targets irradiated with ultra-intense lasers, overcoming previous limitations. The findings demonstrate the robustness of graphene in this application and pave the way for compact and efficient plasma-based accelerators.
Researchers at NGI demonstrate improved spin transport characteristics in nanoscale graphene-based electronic devices, achieving up to 130,000cm²/Vs mobility. The study also reveals spin diffusion lengths approaching 20μm, comparable to the best graphene spintronic devices demonstrated to date.
Rice University scientists have developed a method to extract rare earth elements from fly ash, bauxite residue, and electronic waste using flash Joule heating. This process improves yields and reduces the use of strong acids, making it a more sustainable solution for recycling these materials.
A Korean research team has demonstrated the anisotropic superconductivity of a high-temperature superconductor by stacking twisted pieces of Bi2Sr2CaCu2O8+x using the microcleave-and-stack technique. This study confirms material properties and develops a new fabrication method for nanomaterials.
Researchers use scanning tunneling microscopes to visualize electrons in graphene, discovering crystal structures that exhibit spatial periodicity corresponding to quantum superposition. These findings shed light on the complex quantum phases electrons can form due to their interactions.
Scientists from University of Würzburg create custom-made nanographene with cavities to hold smaller PAHs, forming two- and three-layer complexes in solution. They also isolate pairs as solids, leading to promising results for solar cells
Researchers at the University of Bath have developed a novel chemical glucose sensing method based on boronic acids and graphene foam. The new technique can accurately detect lower glucose concentrations than current systems, making it ideal for chronic conditions like diabetes.
Researchers propose that water molecules interact with electrons in the nanotube walls, slowing down flow. Theoretical findings could significantly impact proposed carbon nanotube applications, such as filtering salt from seawater or generating energy.
Rice University scientists employ machine-learning techniques to streamline the process of synthesizing graphene from waste through flash Joule heating. The lab used its custom optimization model to improve graphene crystallization from four starting materials over 173 trials.
Scientists at Vienna University of Technology have successfully integrated large surface areas of graphene into limited volumes by producing it on complex branched nanostructures. This breakthrough enables increased storage capacity for hydrogen and higher sensitivity in chemical sensors.
Researchers at the University of Manchester observed the Schwinger effect using graphene-based devices, producing particle-antiparticle pairs from a vacuum. They also discovered an unusual high-energy process where electrons became superluminous, providing an electric current higher than allowed by general rules.
A KAIST research team has developed graphene-inorganic-hybrid micro-supercapacitors made of leaves using femtosecond direct laser writing lithography. The innovation enables mass production of flexible and green graphene-based electronic devices, reducing waste and environmental issues associated with traditional batteries.
Researchers at Rice University found that iron itself plays a role in its own corrosion when exposed to supercritical CO2 and trace amounts of water. Thin layers of 2D materials like graphene can serve as a barrier to prevent corrosion.
Researchers have successfully synthesized a new 2D material, 2D cuprous iodide, by stabilizing it in a graphene sandwich. The study's lead author notes that understanding the structure was crucial to designing a chemical process for large-scale production.
Researchers have developed a method to analyze audio from graphene production, allowing for near-instantaneous assessment of product type and purity. This approach could improve manufacturing processes, such as flash Joule heating and sintering, by providing real-time data on material properties.
A Korean research team created a DUV LED using hexagonal boron nitride (hBN), emitting strong UV light with low skin penetrability. The new material has higher luminescence efficiency and enables miniaturization, making it suitable for various applications.
A UCF researcher is leading a $1.5 million DARPA project to develop a highly sensitive infrared imaging system that can enhance night vision, space exploration, and healthcare diagnostics. The system will use graphene-based nano-antennas to collect light, enhancing infrared absorption by over 30 times.
A new graphene-based platform allows researchers to control the interaction strength between electrons and holes, enabling the formation of quantum condensates at room temperature. The platform's tunability enables testing of theoretical predictions about superconductivity and its potential for higher temperature limits.
Researchers at JAIST have demonstrated a high thermal rectification ratio on suspended asymmetric graphene nanomesh devices at low temperatures. The device shows promise for developing a high-efficiency thermal rectifier based on graphene nanomesh structure.
Researchers at Brown University discovered that magic-angle graphene becomes a powerful ferromagnet when spin-orbit coupling is introduced. This finding opens up new possibilities for quantum science research and potential applications in computer memory and quantum computing.
Researchers have discovered a new electronic nematic phase in twisted double bilayer graphene, which breaks the material's symmetry and allows for the re-alignment of electrons. This finding adds to our understanding of graphene-based systems and may hold implications for the study of superconductivity.
Researchers at Japan Advanced Institute of Science and Technology developed a graphene sensor that detects electric fields with improved efficiency and reduced size. The mechanism involves the transfer of charges between graphene and traps, allowing for the detection of field polarity and magnitude.
Researchers at Lawrence Berkeley National Laboratory developed a method to stabilize graphene nanoribbons and directly measure their unique magnetic properties. By substituting nitrogen atoms along the zigzag edges, they can discretely tune the local electronic structure without disrupting the magnetic properties.
Researchers have successfully incorporated phosphorene nanoribbons into new types of solar cells, achieving an efficiency above 21%, comparable to traditional silicon-based solar cells. The unique properties of PNRs, including improved hole mobility, enable the creation of high-performance optoelectronic devices.
Researchers developed a method to directly grow high-quality graphene on wafer-scale insulators without transfer, achieving improved electrical performance and carrier mobility. The approach utilizes copper acetate to supply copper clusters, enhancing precursor decomposition and resulting in robust graphene films.
Researchers discovered a graphene-like material called magnetene that exhibits ultra-low friction, contrary to predictions based on Van der Waals forces. Quantum effects play a crucial role in its behavior, making it suitable for use in micro-electro-mechanical systems and implantable devices.
Researchers develop new epitaxial growth mechanism to achieve large-scale single-crystal WS2 monolayers, overcoming a crucial hurdle in replacing silicon with 2D materials. The technique enables uniform alignment of small crystals and leads to the successful growth of wafer-scale single-crystals of WS2, MoS2, WSe2, and MoSe2.
Theorists have observed a rare phenomenon called the quantum anomalous Hall effect in bilayer graphene, a naturally occurring, two-atom thin layer of carbon atoms. The researchers found eight different ground states exhibiting ferromagnetism and ferroelectricity simultaneously.
A team of UBCO researchers developed a recipe for a clean-burning, power-boosting aircraft fuel by adding graphene oxide nanomaterials to ethanol. This mixture improves the burn rate by about eight per cent, reducing carbon footprint and increasing engine power.
Researchers from Germany and Spain successfully create a uniform two-dimensional material with exotic ferromagnetic behavior known as easy-plane magnetism. This discovery opens up new possibilities for spintronics, a technology that uses magnetic moments instead of electrical charges.
A new study proposes a clean technique to dope graphene via a charge-transfer layer made of low-impurity tungsten oxyselenide (TOS), increasing its electrical mobility. The researchers found that doping graphene with TOS resulted in higher electrical conductivity and transparency compared to previous methods.
Researchers have discovered that twisted bilayer graphene can guide and control light at the nanometer scale due to its unique interaction with collective electron movements. This property enables the material to be used as a platform for optical sensing of gases and bio-molecules.
Researchers at Duke University developed electrochromic technology that can alternate between harvesting heat from sunlight and allowing an object to cool. The device, which uses a thin layer of graphene and metal nanoparticles, demonstrates a tuning range of thermal radiation never seen before.
Scientists have developed a new material, black phosphorous, only three atoms thick, which can control light with unprecedented precision. This breakthrough technology has the potential to revolutionize telecommunications and pave the way for Li-Fi, a light-based replacement for Wi-Fi.
Researchers discovered a resemblance between magic graphene's superconductivity and high-temperature superconductors, shedding light on the mysterious ceramic compounds. The study provides evidence for unconventional superconductivity in magic bilayer graphene.