Articles tagged with Graphene
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 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 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 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 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.
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.
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.
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 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.
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.
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.
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.
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.
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.
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 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.
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...
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 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 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 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 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.
A new quantum sensing technique developed by researchers at the University of Maryland uses diamonds to visualize electrical currents in graphene. The technique provides detailed images of current flow, shedding light on the intricate behavior of electrons in this material.
New research finds that graphene flakes can attract water at their edges but repel it on their surface, making them a new generation of surfactant. This property allows graphene to stabilise oil and water mixtures, opening up possibilities for environmentally friendly extraction of minerals and crude oil.
Researchers created a durable graphene-based catalyst that outperforms commercial catalysts and lasts longer, potentially enabling widespread adoption of hydrogen fuel cells. The breakthrough could address the high cost of platinum catalysts and reduce environmental impact.
Researchers propose an all-optical method to modulate plasmonic response in graphene and metal-based systems using intense pump beams, enabling ultrafast light modulation. The technique exploits nanoscale photothermal effects to heat electrons, inducing changes in conductivity and optical properties.
Researchers at Kazan Federal University discovered that water molecules, not manganese derivatives, form covalent C-O bonds in graphene oxide. The study also found that the C-O bonds can be easily cleaved and remigrated along the graphene plane.
Researchers have developed graphene-based sensors that retain adsorbed gas molecule interactions hours after electric field is turned off, enabling long-term molecular identification and 'beyond-sensing' applications.
Researchers have successfully produced porous, nitrogen-containing graphene ribbons exhibiting semiconducting properties, which is essential for their potential applications in electronics. These new materials could display extraordinary magnetic properties, making them suitable for quantum computing applications.
Researchers observed how indium oxide grows on graphene, revealing the importance of background pressure and temperature in the process. The study's findings have significant implications for predicting and controlling the integration of graphene with other materials.
Scientists discover magic-angle graphene can behave like an insulator or a superconductor at the same time, sparking new research on the material's physics. The study reveals that the insulating and superconducting phases may compete with each other, rather than being directly related.
Researchers developed a graphene-based ultrathin lens that can be electrically tuned to adjust focusing and eliminate chromatic aberration. The device features high transmittance, high resolution, and multifunctional capabilities for various display applications.
Scientists successfully synthesized a 17-carbon wide graphene nanoribbon with the smallest bandgap seen to date among known graphene nanoribbons. This breakthrough has significant implications for the development of new electronic devices.
Graphene sensors printed with aerosol jet technology can detect histamine in tuna broth down to 3.41 parts per million, exceeding US FDA guidelines for food safety. The technology also has potential applications in environmental toxin detection, wearable health monitoring, and disease diagnostics.
Researchers at MLU, UT, and ORNL have successfully produced graphene nanoribbons directly on semiconductor surfaces, overcoming previous limitations. This breakthrough enables customization of the material's properties, paving the way for potential applications in storage technology, semiconductor industry, and quantum computing.
Researchers have developed a new technique using V-shaped graphene-metal film structures to study the properties of individual organic molecules and nanolayers. The approach relies on plasmon localization, which enables the team to focus on the sample and register a response from several molecules or even a single large molecule like DNA.