Articles tagged with Graphene
Researchers successfully grew forests of carbon nanotubes on a sheet of graphene, creating a seamless three-dimensional structure with a massive surface area. This hybrid material offers great potential for electronic components like fast supercapacitors.
Researchers have successfully increased graphene's conduction electrons' spin-orbit coupling by a factor of 10,000, enabling the construction of a switch that can be controlled via small electric fields. The discovery opens up new possibilities for building graphene-based components.
By fabricating graphene structures atop nanometer-scale steps etched into silicon carbide, researchers have created a substantial electronic bandgap suitable for room-temperature electronics. The bandgap allows for the fabrication of transistors and other devices, potentially opening the door for developing all-carbon integrated circuits.
Researchers from China have devised a universal method using just an optical microscope to measure graphene and other two-dimensional materials' thickness. The technique exploits the reflected light's red, green, and blue components, increasing contrast with sample thickness.
Graphene crystals offer unprecedented stiffness, electrical and thermal properties due to their two-dimensional atomic structure. Researchers are now able to study the bonding characteristics of individual impurities in graphene, enabling them to optimize materials for specific applications.
A Northwestern University team has developed a technique for creating nanofluidic devices using paper and scissors, generating numerous ion channels when layered. The method uses inexpensive materials and allows for easy shaping and scaling of the device.
Physicists create graphene mini-labs to study fast-moving electrons and their relativistic behavior. The experiments mimic the dynamics of cosmic rays, despite traveling at a fraction of the speed of light.
Researchers have found that graphene membranes contain tiny pores, allowing small molecules to pass through while blocking larger ones. This discovery opens up new possibilities for creating membranes that can filter microscopic contaminants from water or separate specific types of molecules from biological samples.
Researchers created a multilayer cake using graphene and boron nitride to form a nanoscale electric transformer. The breakthrough paves the way for complex electronic devices with novel architectures.
Researchers at Rice University have made a breakthrough in doping graphene with light, allowing for the creation of simple, graphene-based diodes and transistors on demand. The discovery uses plasmonics to manipulate light and inject electrons into the material, enabling novel security and cryptography devices.
The graphene-paved roadmap outlines the material's potential for transforming various industries, including electronics and medicine. With its unique properties, graphene is expected to play a crucial role in developing new technologies such as flexible devices, rollable e-paper, and high-speed wireless communications.
The University of Colorado Boulder has developed graphene membranes with tiny pores that can efficiently separate gas molecules based on size. This technology holds promise for enhancing natural gas production while reducing carbon dioxide emissions from power plant exhaust pipes.
Researchers at UT Dallas have successfully controlled the size of graphene nanopores, enabling potential low-cost DNA sequencing. The achievement could lead to improved disease diagnosis and treatment by allowing tailored drug development based on an individual's genetic code.
Researchers created a defect in the structure of a single-layer crystal by inserting an extra particle, then observed as the crystal 'healed' itself. The discovery has important implications for improving conductivity in electronics and other materials science applications.
Researchers at NTNU have patented a method to grow semiconductor nanowires on graphene, offering excellent optoelectronic properties. This technology has the potential to enable new types of device systems, including solar cells and self-powered nanomachines, with large market potential.
Rice University researchers have developed a nanoreactor theory to predict graphene formation, which can advance the material's quality and electronic properties. The team found that the shape of the graphene edge pattern is dictated by the most efficient use of energy, with skewed edges growing fastest.
A new method, called laser shock-induced shaping, enables the tuning of nanowires by altering electrical and optoelectrical properties critical for electronic components and instruments. Graphene was also successfully shaped using this technique.
Researchers at MIT have successfully produced complex electronic components from molybdenum disulfide, a material that naturally comes with a bandgap and could enable new products such as glowing walls, clothing with embedded electronics, and glasses with built-in display screens. The discovery opens up a new realm of research on two-d...
New experiments show graphene reacts chemically and electrically differently depending on the substrate material, allowing for patterned surfaces with varying chemical behavior. This discovery enables the creation of microarrays of sensors and potential protective coatings for materials.
Researchers measured spin properties of electrons in graphene using a new technique, enabling the detection of spin resonance electrically. This breakthrough propels research forward into optimizing graphene for spintronic applications.
Researchers at Lawrence Berkeley National Laboratory have made the first direct observations of electron-electron interactions in graphene. The study reveals that these interactions are critical to graphene's extraordinary properties, including its superconductivity and high-speed conductivity.
Researchers at the University of Manchester have developed a side-view imaging technique to visualize individual graphene layers in devices, finding that structures are remarkably stable even with multiple layers. This achievement has significant implications for the engineering of graphene-based computer chips.
Researchers at Columbia Engineering demonstrate graphene's remarkable optical nonlinear behavior, enabling broad applications in optical interconnects and low-power photonic integrated circuits. The graphene-silicon hybrid device achieves radio frequency generation with a resonant quality factor more than 50 times lower than what other...
Researchers have successfully trapped and controlled light within a graphene lattice, allowing for the development of computers with optical switches. This breakthrough demonstrates the high potential of graphene in nanoelectronics.
Researchers at NIST and University of Maryland successfully created graphene quantum dots by manipulating the strain in graphene drumheads. By controlling the tension on the drumhead, they mimicked magnetic fields and created semiconducting regions with a band gap, crucial for computing and other applications.
Scientists have demonstrated that they can control the length and height of plasmons on graphene using an electrical circuit, opening up possibilities for information processing in tight spaces. This breakthrough uses infrared light to excite surface plasmons with wavelengths as short as 100 nanometers.
Scientists visualize the trapping and confinement of light on graphene, making it a promising candidate for optical information processing. Graphene plasmons can be used to electrically control light, enabling new optical switches and applications in medicine, bio-detection, solar cells, and quantum information processing.
Researchers at Rice University have created a tiny coaxial cable that is about a thousand times smaller than a human hair and has higher capacitance than previously reported microcapacitors. The nanocable, made with carbon and copper, could be used to build next-generation energy-storage systems.
Researchers at the University of Notre Dame have developed a new sensor that can detect organic contaminants in water at very low concentrations. The sensor uses silver nanoparticles and graphene oxide films, allowing for side-selective deposition of metal ions.
Researchers at the University of Maryland have developed a new type of hot electron bolometer that can detect infrared light with high sensitivity and speed. The device uses bilayer graphene to absorb low-energy photons, making it promising for applications in security imaging technologies and studying dark energy.
Iowa State researchers have found a new photo-excited graphene state characterized by broadband population inversion of electrons, resulting in optical gain. This discovery could enable the development of efficient amplifiers and opto-electronics devices.
Researchers have developed a closed-loop fabrication method to tailor graphene into desired edge structures and shapes. The technique uses interaction forces as real-time feedback, allowing for precise cutting control. This innovation has the potential to fabricate large-scale graphene-based nanodevices at low cost with high efficiency.
University of Florida physicists achieved a groundbreaking 8.6% power conversion efficiency from a graphene solar cell created in their lab by chemically treating the graphene with trifluoromethanesulfonyl-amide. This breakthrough could make graphene solar cells a contender in the market if production costs are kept low.
Researchers at Georgia Institute of Technology found that hydrogen availability significantly affects graphene oxide's properties, which can be controlled through chemical and thermal treatments. Understanding this control is crucial for realizing potential applications, such as nano-electronics and energy storage.
A group of researchers at the University of California, Riverside developed a technique to lower hot spots in GaN transistors by introducing graphene multilayers, increasing device lifetime by a factor of 10. The new approach represents a transformative change in thermal management.
GraphExeter, a graphene-based material, enhances solar panel efficiency by up to 30% due to its wide light spectrum transparency. It has the potential to replace indium tin oxide in wearable devices and smart windows, offering a flexible alternative for electronics industry
Researchers at Michigan Technological University discovered that adding graphene to titanium dioxide increases conductivity, bringing 52.4% more current into the circuit in dye-sensitized solar cells.
A team of scientists has developed a technique to encapsulate liquids containing nanocrystals between layers of graphene, enabling the direct observation of chemical reactions at the atomic scale. This breakthrough allows for unprecedented studies of nanoscale phenomena in liquids.
Researchers created a graphene lens that focuses electrons by controlling the focal length through geometry changes. The graphene lens uses strained graphene to shepherd electrons to a fine point, allowing for high-speed data exchange without traditional cable restrictions.
Researchers at UWM create a semiconducting material called graphene monoxide (GMO) from graphene oxide, which could revolutionize electronics. The discovery pushes carbon materials closer to replacing traditional wires in devices.
Researchers developed a graphene liquid cell to visualize nanoscale processes in fluids with atomic-level resolution. The technology enables real-time imaging of platinum nanocrystals in solution, shedding light on atomic-level dynamics and coalescence.
Researchers found a way to influence electron flow through graphene by mounting it on boron nitride, enabling more controlled electronic properties. The discovery creates hexagonal structures that prevent some electrons from passing through, opening up new possibilities for graphene-based microelectronics.
Researchers from the University of Florida have developed a new technique to create graphene patterns on silicon carbide using ion implantation. This method allows for selective graphene growth at lower temperatures and can be used to create graphene nanoribbons with nanoscale dimensions.
A new method for mass-producing high-quality graphene nanosheets has been developed by researchers, enabling the production of sheets at a lower cost than current methods. The technique uses dry ice and an industrial process to create flakes of graphite with opened-up edges, making them soluble in solvents and allowing for easy separat...
Researchers at Stanford University have engineered piezoelectricity into a nanoscale material, known as graphene. By modifying the graphene lattice, they were able to achieve fine physical control and created piezoelectric levels comparable to traditional materials. This breakthrough brings new dimension to straintronics and has promis...
Scientists from Stanford University and SLAC National Accelerator Laboratory have created a system of 'designer electrons' with unique properties. By tuning the fundamental behavior of electrons, researchers can create exotic variants of ordinary electrons that may lead to new types of materials and devices.
Researchers at Vanderbilt University have identified a major barrier to faster graphene devices, finding that charged impurities on the surface of graphene scatter electrons. By using electrically neutral liquids, they achieved record-levels of room-temperature electron mobility, three times greater than previous graphene-based devices.
Researchers have discovered that graphene provides exceptional corrosion protection, even at a single layer thickness, outperforming conventional coatings. The study's findings suggest graphene could be ideal for applications where a thin coating is necessary, such as in microelectronic components.
Researchers at Northwestern University have created a new method to oxidize graphene, overcoming the material's zero band-gap issue. The reversible oxidation process enables tunability of electronic properties, paving the way for high-performance applications.
Researchers from the University of Bristol have identified graphene's stress and strain shear modulus and internal friction, shedding light on its structural behavior as a mechanical material. The study suggests CVD-grown single-layer graphene films could be used in nanosensors, providing a vital alternative to existing materials.
Graphene flakes are used to protect molecules from short circuits, paving the way for new electronics in memory technology, displays, and solar cells. The development solves a decade-old problem and allows for alternative conductive and non-conductive molecules to be used.
The University of Houston assistant professors received NSF CAREER awards for their innovative work on graphene's optical properties, polymer-based cells, and environmental impact. Bao aims to confirm graphene's ability to act as an optical waveguide, while Moeller researches fundamental materials structure-property relationships.
Researchers at the University of Manchester have created a transistor that may prove graphene's potential as the next silicon for computer chips. The new device uses a vertical direction and exploits graphene's unique features to overcome current leakage issues.
Scientists have created a graphene-based ultra-fast photodetector that can detect pulses as short as a few picoseconds. The device also generates terahertz radiation, which has properties of both particle and electromagnetic waves. This breakthrough could lead to advancements in material testing and medical treatments.
Researchers at the University of Manchester discovered graphene oxide membranes that can selectively remove water while blocking other substances, potentially leading to new applications in filtration and separation
A Rice University research team made graphene suitable for organic chemistry applications by attaching various molecules to its sheets, enabling advanced chemical sensors and electronic circuits. The hydrogenation process transformed graphene into a semiconducting superlattice, allowing for tailored functionality.
A UC Riverside-led team has identified a property of bilayer graphene that becomes insulating when the number of electrons on the sheet is close to zero. This finding suggests promising routes for digital and infrared technologies, including trilayer and tetralayer graphene with larger energy gaps.
A new study reveals graphene's ability to enhance conductivity while retaining wetting characteristics, making it a promising coating for various applications. The research found that gold, copper, and silicon get just as wet when clad by a single layer of graphene as they would without.
Researchers at Rensselaer Polytechnic Institute and Rice University discovered that a single layer of graphene enables near-perfect wetting transparency. The extreme thinness of graphene allows it to be transparent to water, with contact angles varying from 77 to 86 degrees on different surfaces.
Researchers from the University of Illinois at Urbana-Champaign and Dioxide Materials have developed a chemical sensor using randomly stacked graphene flakes. The thin films of flaky graphene outperformed previous sensors made from carbon nanotubes or graphene crystals, detecting trace amounts of test chemicals with high reliability.