Articles tagged with Graphene
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.
Researchers at Linköping University found that hydrogen renders graphene more useful by making its atomic van der Waals forces repulsive, allowing sheets to float freely apart. This discovery has several potential applications, including storage of hydrogen as vehicle fuel and manufacture of friction-free components on a Nano scale.
A Rice University-led team discovered a one-step chemical process to create graphene quantum dots from carbon fiber. The sub-5 nanometer carbon-based quantum dots are highly soluble and have controllable size, with potential for biomedical imaging, protein analysis, and cell tracking.
Researchers at NIST developed a new software to quantify the friction of graphene, finding that the material becomes more slippery when stacked. The study provides new quantitative data and sheds light on the differences in graphene's friction compared to three-dimensional graphite-like materials.
Researchers at UC Riverside have made a significant discovery in graphene's thermal conductivity, showing that isotopically engineered graphene can conduct heat more efficiently than natural graphene. This finding has the potential to impact various applications, including electronics, photovoltaic solar cells and radars.
Researchers at the University of Texas at Dallas have discovered a new material called graphene that conducts heat 20 times faster than silicon, leading to more-efficient cooling of electronics and potentially longer-lasting computers and cellphones.
Researchers at the University of Texas created a new graphene form that is 60% more effective at managing and transferring heat than normal graphene. This breakthrough could lead to smaller, faster, and more powerful electronic devices with improved performance.
Researchers at the University of Manchester have successfully made graphene magnetic by introducing vacancies and nonmagnetic atoms. The study's findings hold promise for future applications in spintronics and electronics, despite the tiny magnetism observed.
Engineers created graphene's pseudo-piezoelectric behavior by punching triangle-shaped holes into it, producing strong piezoelectricity comparable to well-known substances like quartz. The results have the potential to open new avenues for graphene and applications relying on piezoelectricity.
Research from Rice University and UC Berkeley reveals graphene tears along energetically favorable lines, creating desirable edges. The study suggests a new way to control graphene's electrical properties by manipulating its edges.
Graphene nanowiggles exhibit highly varied band gaps and magnetic properties, enabling customization of nanostructures for different tasks. The discovery provides a roadmap for building and designing new devices using these promising nanomaterials.
Researchers developed a method to prevent graphene re-stacking and created materials that can process in solvents and film matrices, exhibiting giant broadband nonlinear optical absorption response. The discovery sets a new record in energy limiting onset of 10 mJ/cm^2 for linear transmittance of 70%.
Researchers at Helmholtz-Zentrum Dresden-Rossendorf have measured the lifetime of electrons in graphene in lower energy ranges. The study reveals that the energy of light particles and atomic lattice oscillations influence electron lifetimes, with longer lifetimes observed when excitation energies are lower than lattice oscillations.
Researchers at Rice University have developed functionalized graphene oxide to alleviate clogging issues in newly drilled wells. The material forms a thinner, lighter filter cake that allows for improved drilling efficiency and reduced environmental impact.
Researchers demonstrate graphene-based transistor array compatible with living cells, recording electrical signals generated by individual nerve cells. The platform shows potential for future bioelectronic applications, including brain-eye-ear implants to compensate for neural damage.
Researchers at University College London discovered electronic stripes on graphene sheets, a finding that could revolutionize the exploitation of this material. The discovery was made using a scanning tunneling microscope and found that extra electrons arrange themselves into nanometer-scale stripes spontaneously.
Researchers found that defects in graphene improve its chemical sensing capabilities, leading to potential breakthroughs in gas detection technology. The study suggests that micrometer-sized line defects can enhance the sensitivity of graphene sensors.
Researchers at Rice University developed a two-step method to attach organic molecules to pristine graphene, making it suitable for various new applications. This breakthrough enables advances in chemical sensors, thermoelectric devices, and metamaterials.
Rensselaer Polytechnic Institute researchers developed a graphene foam sensor that detects ammonia and nitrogen dioxide at concentrations as low as 20 parts-per-million, outperforming commercial gas sensors. The new technology is flexible, rugged, and reusable, making it suitable for various industrial applications.
Researchers at Northwestern University have created an electrode that allows lithium-ion batteries to hold a charge up to 10 times greater than current technology. The new technology can also charge 10 times faster, paving the way for more efficient and smaller batteries for electric cars.
Researchers at Rensselaer Polytechnic Institute have discovered that stacking graphene nanoribbons can significantly enhance its ability to transmit electricity, reducing the band gap and increasing efficiency. The study, published in ACS Nano, brings industry closer to realizing graphene nanoelectronics and potentially replacing coppe...
Electrons in graphene exhibit Klein tunneling, allowing them to pass through energy barriers regardless of width and height. This phenomenon has been observed experimentally in graphene.
Nanotechnology researchers at Georgia Tech have compared two techniques for chemically doping sheets of graphene for device and interconnect fabrication. Edge treatment, which reacts with defects created when the material is cut, was found to be thousand times more efficient than surface treatment.
Graphene's unique properties, including fast electron mobility and high mechanical strength, make it suitable for fast analog electronics. Researchers are working to improve synthetic graphene quality and study its behavior in technology conditions.
The study reveals that certain copper crystal structures promote better graphene growth due to their atomic shape and arrangement. This finding could lead to more cost-effective and high-quality graphene production for consumer electronics applications.
Researchers at Rice University have made a groundbreaking discovery by creating giant flakes of graphene oxide that form a gel-like liquid crystal in water. This alignment enables the creation of metamaterials with unique mechanical and electronic properties, as well as high-strength fibers with enhanced properties.
UCSB researchers develop scalable synthesis technique for high-quality and uniform graphene, controlled number of layers, and improved carrier mobility. The discovery paves the way for next-generation electronics applications in green electronics, super-strong materials, and medical technology.
Researchers at Northwestern University have developed a new form of graphene that resists aggregation, thanks to its crumpled shape. The material retains its surface area and remains pure, making it more useful for applications requiring large amounts of the material.
Scientists have developed a material that exhibits physical properties similar to graphene, including superconductivity and magnetic behavior. The discovery was made by combining ultra-high magnetic fields with the unique composition of SrMnBi2, which allows for easy doping with foreign atoms.
Researchers at the University of Manchester have created a graphene 'Big Mac' structure that isolates graphene from environmental influences, allowing for better electronic properties. This breakthrough enables the potential replacement of silicon chips in computers with graphene-based transistors.
Scientists have made precise measurements of the quantum Hall effect in graphene, supporting the redefinition of the kilogram and ampere. This breakthrough aims to establish a universal and stable definition for these fundamental constants, linking them to natural quantities.
Researchers at UC Riverside discovered that stacking three layers of graphene creates a 'knob' for tuning its electrical properties. The team found that some trilayer graphene devices were conducting while others were insulating, depending on the layer order.
Researchers at Georgia Institute of Technology have developed a method to control silicon evaporation, allowing for the growth of high-quality layers of epitaxial graphene on silicon carbide wafers. This technique enables the production of uniform and high-quality graphene layers, which is essential for electronic device applications.
The discovery of GNR@SWNTs opens up potential applications in electronics, optoelectronics, and energy storage. Researchers have found that the shape of encapsulated graphene nanoribbons can be modified by different polyaromatic hydrocarbon molecules, allowing for metallic or semiconductor properties.
Researchers from the University of Notre Dame have developed a graphene-based modulator that significantly expands the terahertz signal's modulation range to over 90 percent. This breakthrough replaces traditional metal gates with graphene, enabling more versatile applications in communications, medical imaging, and chemical detection.
Purdue researchers develop new type of graphene inverter that works at room temperature, enabling transistors to amplify signals and control switching. The breakthrough could lead to the creation of ultrafast devices with simplified circuits for broader digital applications.
Scientists at Berkeley Lab have demonstrated a microscale device made of graphene that can tune its response to light at terahertz frequencies with exquisite precision. The device uses an array of graphene ribbons to control collective oscillations of electrons, or plasmons, which absorb different frequencies of light.
Researchers at the University of Manchester and Cambridge have discovered a way to enhance graphene devices for photodetectors in high-speed optical communications by 20 times. This is due to the addition of metallic nanostructures that concentrate light within the graphene layer, increasing its efficiency.
Researchers at the University of Colorado Boulder discovered graphene's surprisingly powerful adhesion qualities, which could guide the development of graphene manufacturing and mechanical devices. The study showed that graphene's extreme flexibility allows it to conform to even the smoothest substrates.
Researchers studied electronic properties of bilayer graphene, revealing unique effects due to electron-electron interactions. The material's quasiparticles exhibit chiral symmetry, making it an exciting material for electronic applications.
Researchers at the University of Nottingham have pioneered a new method for producing graphene nanoribbons, which could revolutionize electronic devices. The breakthrough allows for the creation of nano-switches, nano-actuators, and nano-transistors with unprecedented physical properties.
Researchers found a direct relationship between chemical synthesis conditions and graphene alloy electronic properties. This discovery enables precise prediction of final product's properties using well-understood chemical procedures.
Researchers demonstrate that any carbon source can be converted into high-quality graphene, a material with numerous applications. They tested various materials, including food, insects, and waste, to produce graphene, showcasing its potential for widespread use.
A Wayne State University researcher has received a $475,000 grant to develop graphene-based neural implants that could improve the quality of life for millions. The technology aims to overcome limitations of current implantable devices by using a flexible material and biodegradable backing.
Researchers at Rice University have created a hybrid graphene film that combines conductivity and transparency, potentially replacing indium tin oxide as a transparent conductive coating in displays. The material outperforms ITO in terms of transparency and conductivity, and is environmentally stable.
Researchers have developed a graphene-based device that stores information in ferroelectric material, increasing fidelity and reducing operating voltage. The device's high-speed performance is expected to overcome issues associated with traditional memory devices.
Berkeley Lab researchers have created a graphene and tin nanoscale composite material for high-capacity energy storage. The new material, dubbed a 'sandwich' structure, bolsters battery performance and enables quick charging and repeated cycling without degradation.
Researchers have discovered a 'quantum leap' in graphene's electronic properties, enhancing electron-on-electron interaction. This breakthrough could accelerate research on devices like touch-screens and ultrafast transistors.
Researchers at Rensselaer Polytechnic Institute developed a graphene coating that harvests energy from flowing water, powering tiny sensors used to detect underground oil and gas. The technology enables cost-efficient oil exploration and could lead to autonomous microscale sensors for various applications.
A new approach to growing graphene reduces problems plaguing researchers, clearing a path for sophisticated electronic devices. Hydrogen controls the graphene grain shape and size, enabling the creation of well-defined graphene grains with perfect hexagonal shapes.
Researchers used ARPES to study graphene's behavior near the Dirac point, observing unusual electronic interactions and renormalization. This discovery confirms graphene's semimetal properties and provides insight into its unique electronic structure.
Research team discovers how simple processing errors can degrade graphene's electrical properties, causing bottlenecks in electron flow. Heating the graphene may be a solution to remove contaminant molecules, ensuring its unique properties are maintained for commercial applications.
Researchers at the University of Manchester showcase graphene's remarkable story and potential applications. Visitors can interact with a virtual microscope, see real images of graphene, and learn about its unique properties, including superconductivity, transparency, and high strength.