Articles tagged with Graphene
Researchers at Georgia Institute of Technology developed a new templated growth technique for fabricating nanometer-scale graphene devices. The method involves etching patterns into silicon carbide surfaces to direct graphene growth, resulting in smooth-edged nanoribbons with controlled widths.
Researchers at Harvard University have demonstrated that graphene can act as an artificial membrane separating two liquid reservoirs, enabling the measurement of ion exchange and the detection of single molecules of DNA. The graphene membrane's atomic thickness makes it a novel electrical device with potential applications in chemical ...
Researchers have discovered a new phenomenon in graphene where electrons split into unexpected energy levels when exposed to extreme conditions. The discovery raises questions about the fundamental physics of graphene and its potential for powerful applications.
Researchers at UCLA have overcome difficulties in integrating graphene into electronic devices, achieving the fastest graphene transistor to date with a cutoff frequency of up to 300 GHz. This breakthrough enables the development of high-speed radio-frequency electronics for applications in microwave communication and radar technologies.
Researchers at Caltech have developed a simple technique using graphene to visualize the structure of molecules at the atomic scale. The technique reveals new details about how water coats surfaces, including its structure and properties.
Researchers used quantum molecular dynamics and transmission electron microscopy to discover an intermediate step in the cleaning process. Electron irradiation prevented loop formation, allowing for efficient edge cleaning and improving graphene's suitability for electronics.
The study found that energy states follow contours of constant electric potential, creating energy gaps within isolated patches on the surface. These gaps are due to a subtle interaction with the substrate, which consists of multilayer graphene grown on a silicon carbide wafer.
Researchers at Lawrence Berkeley National Laboratory have developed a graphene noise model, showing minimal background signal noise near the Dirac point. The model reveals an M-shaped pattern in single-layer graphene and a V-shaped pattern in bi-layer graphene, correlating to spatial-charge inhomogeneity.
Physicists at the University of California, Berkeley discovered that when graphene is stretched, it develops bubbles of quantized electrons behaving in a bizarre way. The discovery opens doors to room-temperature straintronics and control of electronic properties through strain.
Researchers have successfully produced sheets of hexagonal boron nitride (h-BN), a potential insulator to complement graphene's electronic properties. The material can be deposited and transferred to various substrates, opening up possibilities for its use in graphene-based electronics.
Researchers have created giant pseudo-magnetic fields in graphene by applying the right amount of strain, revealing a new window into fundamental scientific discoveries and potential applications. The findings, published in Science journal, exceed the strongest magnetic fields ever sustained in a laboratory setting.
Researchers at the University of Pennsylvania have developed a new, carbon-based nanoscale platform to electrically detect single DNA molecules using graphene nanopores. The platform exhibits high resolution and may provide a way to distinguish among DNA bases, enabling a low-cost, high-throughput DNA sequencing technique.
A USC team has produced flexible transparent carbon atom films for low-cost and convenient electrical power from the sun. Graphene-based solar cells have significant advantages in physical flexibility, potentially enabling printed-on-fabric applications.
Rice University scientists have created an eco-friendly method for mass-producing graphene oxide, a crucial component in various industries. The new process uses common chemicals to produce the material, eliminating toxic gases and making it safer for large-scale production.
Researchers successfully grow graphene ribbons with adjustable properties by creating narrow ribbons with well-defined edges. The new method enables the production of components with specific optical and electronic properties, paving the way for the development of future nanoelectronics.
Researchers have developed a new form of paper that can fight disease-causing bacteria, with potential applications in anti-bacterial bandages, food packaging, and shoe materials. The material, composed of graphene oxide, shows superior antibacterial effects with minimal impact on human cells.
Researchers at Delft University of Technology have developed a novel technique to fabricate graphene nanopores that can detect individual DNA molecules as they pass through. This technology has the potential to significantly impact DNA sequencing by reading off the sequence base by base in real-time.
Researchers have developed a new method to produce graphene using chemical synthesis, creating a material with improved electronic properties. The new approach allows for the fine-tuning of structures in terms of size, shape, and geometry, making it suitable for commercial mass production.
A new technique enables large-scale production of high-quality graphene at room temperature using a molecular wedge, resulting in undamaged graphene dispersed in water. The researchers used the graphene to build chemical sensors and ultracapacitors with high-performance applications in environmental sensing and energy storage.
Graphene oxide exhibits surfactant behavior like soap and shampoo chemicals, dispersing in water and filtering by size. This property has potential applications for carbon nanotube dispersion and graphene device fabrication.
Researchers have developed a one-step process to create nanowires and tune electronic properties of reduced graphene oxide, turning it into a conducting material. This breakthrough could lead to faster and more power-efficient electronics.
Researchers develop a new procedure for mass-producing graphene, a material that could revolutionize electronics devices. The process uses commercially available silicon carbide wafers to produce high-quality graphene with excellent electronic properties.
Brown University researchers have gained new insights into graphene defects through molecular dynamic simulations. They found that oxygen atoms forming double bonds with carbon create irregular holes in the lattice. The team proposes adding hydrogen to remove impurities and heal the holes.
Researchers have developed a liquid-based method to produce high-quality graphene, which could lead to novel carbon composites and more affordable touch screens. The new technique yields very pure material and has the potential to drive down costs in industries such as aerospace, automotive, and construction.
Researchers at Rice University have discovered a way to extract hydrogen atoms from graphane, creating spaces that resemble quantum dots. This breakthrough enables precise control over the semiconducting properties of quantum dots, with potential applications in advanced optics, single-molecule sensing, and nanoscale circuitry.
Researchers discovered that multiple layers of graphene retain strong heat conducting properties, making it a promising material for removing dissipated heat from electronic devices. This breakthrough could lead to the development of new technologies to keep laptops and other devices from overheating.
Researchers at NIST and Georgia Tech have developed a new technique to analyze multilayer graphene, revealing the rotational orientation of graphene sheets and mapping stress fields. The method uses atomic scale moiré patterns to measure strain in graphene layers with high sensitivity.
Researchers investigated how defects in graphene affect its electronic properties. They found that surface quality plays a crucial role in controlling plasmons, which could be harnessed for future technical applications.
Indiana University chemists have developed an unusual solution to create large, stable graphene sheets by attaching a 3D bramble patch to each side. This allows for the creation of uniform-sized graphene sheets that can efficiently absorb sunlight, paving the way for cheaper and more sustainable solar cells.
Researchers found that supported graphene retains exceptional thermal conductivity of up to 600 watts per meter per Kelvin near room temperature. This is significantly higher than copper and silicon thin films currently used in electronic devices.
Researchers at Berkeley Lab have successfully synthesized single-layer graphene films on a dielectric substrate using direct chemical vapor deposition. The method overcomes current fabrication limitations, enabling the production of high-quality graphene films with controlled properties and morphologies.
Researchers have discovered a new material called graphene-oxide-framework (GOF) that can store hydrogen safely and efficiently. GOFs exhibit unique properties, including high hydrogen absorption at low temperatures, making them a promising candidate for gas storage applications.
Scientists have developed a simple method to produce high-quality graphene on commercially available silicon carbide wafers. This breakthrough enables mass production of graphene, a material with unique electronic properties that could replace silicon in electronics devices.
Researchers at Rice University have developed a graphene-hybrid material by stitching together graphene and hexagonal boron nitride. This 2D structure offers new possibilities for materials scientists, with electric properties ranging from metallic conductor to semiconductor to insulator.
Researchers at UCLA have created a new graphene nanostructure called graphene nanomesh (GNM), which can open up a band gap in graphene and create a highly uniform, continuous semiconducting thin film. This breakthrough has the potential to enable practical application of graphene as a semiconductor material for future electronics.
Researchers used supercomputer calculations to analyze how metal contacts on graphene change its electron transport properties. The study provides new information on the effects of metal contacts and proposes quantitative models for describing these effects.
Researchers at Georgia Institute of Technology developed a single-step process to produce both n-type and p-type doping of large-area graphene surfaces. The technique uses commercially-available spin-on-glass material and electron-beam radiation, providing precise control over the amount of radiation applied.
Researchers have produced high-quality graphene on a large scale, overcoming two major barriers to scaling up the technology. The material's electrical characteristics can now be measured with unprecedented precision, paving the way for widespread adoption in high-speed electronics.
The team created fluorescence quenching microscopy (FQM) to image graphene, which overcomes previous limitations in seeing these materials. FQM can be used on a variety of surfaces and requires minimal equipment, making it a promising method for quality control and research.
Researchers at the University of Illinois Chicago have discovered a way to shape graphene into desired forms using only a nanodroplet of water. The method utilizes weak van der Waals forces between water nanodroplets and graphene, allowing for the creation of complex structures such as capsules, sandwiches, knots, and rings.
Researchers from Empa have successfully synthesized a graphene-like polymer with well-defined pores using a 'bottom-up' synthesis method. The new material boasts finer pores than traditional lithographic processes, opening up new possibilities for applications in electronics and other fields.
Researchers at Vanderbilt University have successfully demonstrated the fractional quantum Hall effect in clean graphene, a two-dimensional crystalline material. This breakthrough exploits graphene's unique electrical properties to create novel devices and test theoretical models of extreme environments.
Researchers at NIST have developed a method to calculate the motions and forces of thousands of atoms simultaneously over longer time scales. This breakthrough enables modeling of atomic-scale processes that unfold over time, such as vibrations in crystals, and improves results in fields like nanotechnology and materials science.
Researchers at Rutgers University have discovered novel electronic properties in 2D carbon structure graphene, exhibiting strongly correlated behavior among charge-carrying particles. The findings are similar to superconductivity observed in some metals and complex materials, enabling the flow of electric current with no resistance.
Researchers at Kansas State University have created 'gold snowflakes' on graphene, improving its electrical properties. These nanostars can be used to functionalize DNA and enhance sensitivity. The discovery shows promise for biological devices and electronics.
Graphene nanodomes, formed by concentric rings of carbon atoms, offer new insight into graphene growth and potential methods for assembling components of graphene-based computer circuits. The discovery enables varying the size of the carbon domes from a few nanometers to hundreds of nanometers across.
Researchers from PNNL have developed a DNA-graphene nanostructure that can detect diseases, toxins, and pathogens. The biosensor has potential applications in cancer diagnosis, food safety, and biodefense due to its stability and high sensitivity.
Researchers found that adding graphene to titanium dioxide-based batteries enhances their performance, with electrodes containing graphene charging and discharging faster than those without. This breakthrough could lead to the development of more efficient lithium-ion batteries using inexpensive materials.
By using a special design and the principle of anti-reflective layers, researchers have made graphene visible on gallium arsenide. This achievement enables the measurement of electrical properties of the new material combination, paving the way for further research and development in electronics.
Researchers have designed a new material called graphone, derived from graphene, with unique optical and transport properties. By controlling hydrogen coverage, they made graphene magnetic, opening possibilities for novel applications in spintronics.
Researchers have found a new way to transform graphite oxide into graphene using an ordinary camera flash, which could lead to the production of low-cost transparent and flexible electronics. The process is simple, energy-efficient, and chemical-free.
The discovery of graphane, an insulating equivalent of graphene, may prove more versatile than its predecessor. Graphane retains the thinness, super-strength, flexibility and density of graphene but has a more controlled electrical conductivity, making it suitable for electronic circuits.
Researchers at UCR manipulated ripples in graphene sheets using thermal manipulation, controlling their orientation, wavelength, and amplitude. This technique enables strain-based graphene electronics, which could have profound implications for electronic devices and magnetic fields.
Researchers have made a direct measurement of graphene's quantum capacitance, revealing its unique properties. The findings hold promise for biosensor applications, chemical sensing devices, and flexible displays.
Engineers from Penn and Sandia National Laboratories demonstrate the formation of interconnected carbon nanostructures on graphene substrate using a simple assembly process. The discovery may lead to new approach of graphene-based electronic devices.
Scientists at the University of California, Berkeley, have created tunable semiconductors using bilayer graphene, which can change its bandgap and Fermi energy with an applied electric field. This breakthrough enables the creation of reconfigurable electronic devices, potentially holding millions of differently tuned devices.
Researchers have successfully engineered a tunable bandgap in bilayer graphene, opening the way for nanoscale electronics and photonics. The breakthrough allows for precise control over the bandgap size and doping level, enabling new types of nanotransistors and nano-LEDs.
Researchers demonstrate graphene's potential as an alternative to copper for interconnects in integrated circuits, with improved conductivity and reduced resistance. Graphene's performance is comparable to or surpasses that of copper at nanoscale sizes.
Researchers at Northwestern University successfully chemically functionalize graphene using perylene-3,4,9,10-tetracarboxylic-dianhydride (PTCDA). The resulting monolayer is nearly defect-free and stable under room temperature conditions.
Direct measurement of graphene's energy spectrum reveals unevenly spaced energy levels and a 'zero energy state.' The findings support the idea that graphene layers are uncoupled from adjacent layers due to their unique stacking orientations.