Articles tagged with Graphene
Researchers create magic-angle twisted bilayer graphene to explore interacting electrons' surprising phases of matter. They discovered the creation of unexpected and spontaneous topological states, including topological insulators with free-moving edge electrons.
Researchers have shown that a single layer of graphene can convert light into various colors through nonlinear interactions. The team used nanometer-sized gold ribbons to squeeze light into the graphene, producing strong optical nonlinearities.
A team of researchers developed a paper-based electrochemical sensor that can detect COVID-19 genetic material in under 5 minutes. The sensor uses graphene-based probes to target specific regions of the virus's RNA, providing reliable and sensitive results.
Researchers at Chalmers University of Technology have developed graphene-based heat pipes that can efficiently cool electronics and power systems. The new technology offers a significant energy efficiency contribution to data centres and other applications, reducing greenhouse gas emissions.
Columbia researchers have created graphene plasmon polaritons without an external gate or chemical dopants, using static charge between 2D atomic layers. The discovery has broad applications in nanotechnology, including biosensing and solar energy.
Direct visualization of quantum dots in bilayer graphene reveals a broken rotational symmetry with three peaks instead of concentric rings. This discovery provides crucial information for developing quantum devices based on this system.
Research on strain engineering of 2D materials, including graphene and transition metal dichalcogenides, has shown promising results. The unique mechanical and optical properties of these materials make them suitable for optimizing device performance and enabling new photonic applications.
Scientists from the University of Groningen discovered how strontium titanium oxide can change its resistance based on changes in the number of electrons or accumulation of oxygen vacancies. This finding opens up new paths to memristive heterostructures combining ferroelectric materials and graphene.
Researchers at Tohoku University have successfully amplified 3D graphene's electrical properties by controlling its curvature. The study found that the motion of electrons on the 3D curvature enhances electron scattering, leading to unique electrical properties.
A Northwestern University research team has uncovered new findings on the role of ionic interaction within graphene and water. The insights could inform the design of energy-efficient electrodes for batteries and provide backbone ionic materials for neuromorphic computing applications.
A new method developed at KAUST uses laser beams to produce uniform, three-dimensional graphene electrodes with high porosity and surface area. The electrodes exhibit excellent electrocatalytic activity and distinguish paracetamol and other compounds. Researchers plan to optimize the fabrication of sensors and expand their applications.
The discovery of Brown-Zak fermions in graphene-based superlattices offers a new perspective for electronic devices operating under extreme conditions. The high mobility of these quasiparticles allows them to travel long distances without scattering, making them suitable for ultra-high frequency transistors.
Scientists create one-dimensional array of individual molecules and precisely control its electronic structure. By manipulating individual molecules, they can create alternating charge patterns, allowing for information transfer in tiny circuits.
Researchers demonstrate graphene heterogeneous fiber micro resonator, generating dissipative soliton mode-locked laser combs with dynamic tunability. The graphene device provides opto-electric stabilization, reducing phase noise to instrument-limited floor, -130 dBc/Hz at 10 kHz offset.
Researchers at the University of Tokyo have developed a new and efficient way to create nanographene, a material that is expected to revolutionize technology. The method uses an atomic force microscope (AFM) to precisely control the fabrication process, allowing for the creation of tailored nanographene formations.
Researchers at the University of Nottingham have successfully used inkjet printing to create novel electronic devices with useful properties. The study shows that combining advanced manufacturing techniques with quantum wave modeling enables the creation of customized structures with promising applications for optoelectronic devices, w...
Researchers have developed a graphene-organic heterojunction transistor that can modulate photocurrent speed, magnitude, and direction using light. The device utilizes the effective exciton thickness limitation of an intermediate organic transport layer to achieve logic reversal under optical modulation.
Researchers at Penn State have developed graphene-based memory resistors that mimic the brain's neural networks and offer high precision neuromorphic computing. The new technology can control up to 16 possible memory states, compared to two in most existing memristors.
Researchers at Rice University have created a new method to convert plastic waste into high-quality graphene, offering a potential solution to the global plastic waste crisis. The flash graphene process eliminates much of the expense associated with recycling plastic, making it an economically viable alternative.
Researchers at Rice University have developed a new method to create nanodiamond from graphene by applying pinpoint pressure, overcoming the energetic barrier to nucleation. This breakthrough could lead to the creation of single-crystal diamond films for electronics and optical applications.
Researchers at Ames Laboratory discovered a correlation between broad diffraction patterns and high-quality graphene, challenging conventional wisdom. The discovery has implications for reliable quality control of 2D materials in manufacturing environments.
Researchers have developed an on-surface synthesis method to create graphene nanoribbons with precise electronic properties, advancing quantum devices. The approach uses a titanium dioxide surface and achieves atomic-scale precision, decoupling the material from the substrate and enabling unique quantum properties.
Scientists at Chalmers University of Technology develop a new method for controlling the edges of two-dimensional materials, resulting in extremely sharp and atomically precise patterns. This breakthrough enables the creation of perfect edges in 2D materials, opening up new possibilities for nanoscience and technology.
Researchers at Columbia University discovered a rare form of magnetism in a three-layer graphene structure, showcasing exotic electronic states and controllable magnetic behavior. The twist angle enables the manipulation of spin-free magnetism, opening new possibilities for quantum computation and energy-efficient data storage.
Materials scientists developed a method to spray graphene ink onto flexible substrates at a specific angle and temperature, creating micro-supercapacitors with excellent performance. The new design stores up to 2 times more charge per square centimeter than previous devices, making it suitable for wearable electronic skin devices.
A new synthesis method for crystalline graphitic nanoribbons has been developed, utilizing pressure-induced polymerization of 1,4-diphenylbutadiyne. The resulting product is a graphene nanoribbon with an armchair edge and controlled width.
Researchers developed a method to generate precisely controlled graphene microbubbles with perfect spherical curvature, suitable for use as concave reflective lenses. The high uniformity of the graphene oxide films enables precise control over bubble position, size, and stability.
A broadband graphene detector has been created to reveal the polarization of terahertz radiation. The device relies on plasma wave interference and has potential applications in next-generation information transmission systems and medical diagnostics.
Researchers at KAUST have developed a fast and efficient way to make a carbon material that can dissipate heat in electronic devices. The new material, called nanometer-thick graphite film (NGF), is approximately 100 nanometers thick and can be grown on nickel foils using chemical vapor deposition.
Researchers at the University of Washington have discovered that stacked graphene bilayers can exhibit highly correlated electron properties. The team found evidence of exotic magnetic states and correlated insulating states with features resembling superconductivity. The origins of these features are attributed to quantum mechanical p...
Researchers have developed a new type of transistor that can emit strong light, overcoming previous limitations. By modulating the contacts and channel with separate three gates, the polarity and light emission can be controlled, showing great promises for multi-digit logic devices and highly integrated optoelectronic circuitry.
Physicists at the University of Arkansas have successfully developed a graphene-based circuit capable of capturing thermal motion and converting it into electrical current. The discovery proves a long-held theory that graphene can harness energy from its atomic motion.
Researchers developed a new microwave radiation sensor with 100,000 times higher sensitivity than currently available sensors, enabling improved thermal imaging and detection of electromagnetic signals. The technology has potential applications in quantum sensing, radar, and the search for dark matter.
The study creates controlled X-ray radiation with a narrow spectrum, tunable at high resolution, from advanced van der Waals materials. This innovation has the potential to replace expensive facilities and enable new applications in medical imaging, chemical analysis, and security screening.
A joint research team has developed an ultrasensitive sensor that can detect microwaves with high sensitivity, enabling the commercialization of next-generation technologies like quantum computers. The device uses graphene and a Josephson junction to measure microwave photons absorbed per unit time.
A team of scientists at ICFO has developed a graphene-based bolometer that can detect microwave photons with extremely high sensitivities and fast time responses. The device uses a microwave resonator to generate photons, which are then detected through the heating of graphene.
Physicists at Aalto University have developed a new detector that can measure energy quanta with unprecedented resolution, overcoming limitations in current state-of-the-art detectors used in quantum computers. The graphene bolometer achieves speeds of well below a microsecond and higher theoretical accuracy than voltage measurements.
A team of researchers at UC Berkeley has created the last tool in the toolbox for building working carbon circuits, a metallic wire made entirely of carbon. This breakthrough enables the creation of more efficient carbon-based transistors and ultimately, computers that can switch many times faster and use less power.
Researchers at KAUST have developed graphene-based sensors to monitor multiple environmental variables in extreme conditions. The sensors can withstand temperatures of up to 650 degrees Celsius and offer increased sensitivity in temperature sensing.
Two Pitt projects have received more than $1 million in NSF funding, one investigating the water wettability of floating graphene and the other developing high-performance materials for liquid-phase energy storage systems.
Researchers have confirmed that calcium atoms create a high-temperature superconductor when injected into graphene on a silicon-carbide substrate. The calcium atoms 'float' between the upper graphene layer and the lower 'buffer' sheet, surprising scientists who had expected them to be between two carbon layers.
A research team from City University of Hong Kong has produced graphene masks with an anti-bacterial efficiency of 80%, which can be enhanced to almost 100% with exposure to sunlight. The graphene masks are easily produced at low cost and can help resolve the problems of sourcing raw materials and disposing of non-biodegradable masks.
Physicists develop minuscule superconducting quantum interference device (SQUID) able to detect extremely weak magnetic fields, with potential applications in medicine and research. The device features a complex six-layer stack of individual two-dimensional materials.
A team of international researchers has successfully demonstrated room-temperature coherent amplification of terahertz radiation in graphene. The development paves the way for a new generation of all-electronic, resonant, and voltage-controlled THz amplifiers.
A new wearable gas sensor has been developed to detect nitrogen dioxide at low concentrations, with improved sensitivity compared to conventional designs. The sensor combines laser-induced graphene foam material with molybdenum disulfide and reduced-graphene oxide nanocomposites, enabling real-time environmental monitoring applications.
Researchers at Monash University developed a machine-learning algorithm that can characterise graphene properties and quality without bias in under 14 minutes. This technology will help manufacturers boost the quality and reliability of their graphene supply, saving time and money.
Researchers trap and control light at the interface of atomically thin nanomaterials, leveraging topological effects to create predictable and controllable photonics. The study demonstrates on-and-off electric switching and dimensional hierarchy of the device's topology.
Researchers at Cornell University developed a graphene-based Hall-effect sensor that can operate over a greater temperature range than previous sensors. The device can detect miniscule changes in magnetic fields, even within a larger magnetic background, making it ideal for various technological applications.
Researchers successfully synthesized a pristine diamane film using high-pressure compression, demonstrating its semiconducting properties and potential applications in electronic devices. The film has an energy gap of 2.8 eV, which is higher than that of gapless graphene.
A study finds that exchange and correlation effects significantly impact the electron mobility of Na3Bi, leading to unexpectedly fast conduction electrons. The research uses a scanning-tunnelling microscope technique to map the electronic structure in the material.
A team of researchers has created a new family of inks that can print electronic devices with unprecedented scales. The ink formulation overcomes the coffee ring effect, allowing for uniform thickness and properties in printed shapes.
Buckled graphene mimics colossal magnetic fields, altering electronic properties for novel quantum materials and superconductors. Researchers discover dramatic changes in material's behavior at extremely low temperatures.
A new method developed by researchers at the University of Sussex provides detailed information about the size and thickness of graphene particles. This technique is a non-destructive, laser-based approach that allows for statistical mapping of nanosheet populations in materials.
Researchers at the University of Manchester have discovered a nanomaterial that mimics the 'magic angle' effect in twisted bilayer graphene, offering an alternative medium to study superconductivity. The new findings show strong electron-electron interactions in rhombohedral graphite, which could lead to game-changing effects in materi...
Researchers at University of Bath discover formula to predict interaction between layers of atomically thin materials, enabling efficient design of electronic components. The study's findings have the potential to lead to breakthroughs in materials science and their practical applications.
A compound used in rewritable discs has been found to exhibit Dirac electrons, behaving similarly to graphene. The discovery could lead to the development of faster electronic devices with improved switching speeds.
Researchers have created a method to selectively process surfaces on an atomic scale, leaving one layer intact while perforating another. By utilizing highly charged ions, they can anchor metals on ultra-thin layers, enabling the creation of new materials with promising properties.
Researchers have developed a new method to enhance graphene-based supercapacitors, increasing storage capacity and reducing size. The approach uses gel-based electrolytes, offering a path to miniaturized on-chip energy storage systems compatible with silicon electronics.
Researchers find twisted bilayer graphene displays strong photoresponse and superconducting states when exposed to mid-infrared light. The material's unique properties make it a promising candidate for advanced devices.
A novel method to grow multi-layered, single-crystalline graphene with a selected stacking order in a wafer scale has been developed. The researchers used Cu-Si alloy formation to control the number of graphene layers, allowing for uniform large-area single-crystalline layer-tunable multilayer graphene growth.