Articles tagged with Graphene
Researchers have developed a graphene-based photodetector capable of converting absorbed light into an electrical voltage in less than 50 femtoseconds. The device utilizes ultrafast pulse-shaped laser excitation and highly sensitive electrical readout to achieve this ultrafast conversion.
Researchers at Chalmers University of Technology have discovered that large area graphene can preserve electron spin over extended periods and communicate it over greater distances than previously known. This breakthrough has opened the door for developing faster and more energy-efficient memory and processors in computers.
Researchers summarize the recent progress on theoretical studies of various 2D Dirac materials, including graphene, silicene, and graphynes. They predict these systems will exhibit half-integer quantum Hall effects and ultrahigh carrier mobility, with potential applications in physics and technology.
Researchers at the University of Melbourne have discovered a new method for DNA sequencing using graphene, a one-atom thick sheet of carbon. This technique promises to improve speed, throughput, reliability and accuracy while reducing costs compared to current methods.
A team of researchers from ORNL has successfully demonstrated an energy-efficient desalination technology using a porous graphene membrane. The new method, which uses a one-atom thick graphene sheet with pores as small as 0.5 nanometers, can purify water at an order of magnitude higher rate than traditional methods.
Scientists found small square crystals of ice at room temperature in a transparent nanoscale capillary made from graphene, which allowed them to see individual water molecules. The researchers used computer simulations to find that thin layers of water can form square ice independently of the material's chemical makeup.
Researchers at Caltech have developed a method to produce high-mobility graphene in a single step at lower temperatures, resulting in fewer defects and improved electrical properties. The new technique has the potential to pave the way for commercially feasible graphene-based solar cells and electronics.
Researchers discovered that slightly imperfect single-layer graphene can shuttle protons from one side to the other in mere seconds, outperforming conventional membranes. This new mechanism could lead to improved fuel cell design and fast-charging batteries for transportation.
Researchers discovered that graphene's naturally occurring defects allow hydrogen protons to cross the barrier at unprecedented speeds, creating water channels. This breakthrough could lead to more efficient separation membranes for desalination and a new design for fuel cells.
Researchers have created a new basis for streamlined and more efficient energy technologies by discovering graphene's ability to serve as a proton-selective permeable membrane. This breakthrough could facilitate improvements in fuel cell production, transportation, and use, addressing key issues like size and efficiency.
The study found that geometric relationships between graphene and the substrate determine island shapes, with triangular surfaces leading to more irregular structures. Understanding this process can help design grain boundaries with specific properties, useful for electronics applications.
Researchers discovered that graphene oxide effectively eliminates bacteria linked to tooth decay and gum disease, potentially providing a new tool for fighting these common health problems. The material destroys bacterial cell walls and membranes, slowing the growth of pathogens.
Researchers at EPFL have demonstrated that graphene exhibits quasi-lossless heat transfer, allowing it to propagate heat without significant losses even at room temperature. This discovery has valuable implications for the design of future electronic components.
Researchers from the University of Minnesota have discovered a new 'wonder material' in black phosphorus, which demonstrates high-speed data communication on nanoscale optical circuits. The devices show vast improvement in efficiency over comparable graphene-based devices.
Researchers at the University of Manchester have discovered that graphene oxide can selectively target and neutralize cancer stem cells (CSCs), which are responsible for cancer spread and recurrence. The study suggests that graphene oxide could be used as a non-toxic anti-cancer agent in combination with existing treatments.
University of Pennsylvania researchers have made an advance in manufacturing molybdenum disulphide, allowing for easier control over its size, thickness, and location. The new technique enables the creation of transistors that turn on and off, as well as devices that emit light.
Scientists have created ultra-small and highly sensitive gas sensors made of molybdenum disulfide, which can selectively detect ethanol, acetonitrile, toluene, chloroform and methanol vapors. The sensors are ideal for various applications due to their small size, high selectivity and sensitivity.
Researchers have created a novel solid-state technology platform that enables the use of terahertz photonics in various applications. The new nanodetectors can detect frequencies greater than 3 THz and offer competitive noise equivalent powers with commercially available technologies.
A team of researchers from INRS developed novel graphenated-MWCNTs with enhanced field electron emission properties by decorating graphene sheets with gold nanoparticles. This innovation enhances the density of electron-emitting sites, improving FEE performance and opening new prospects for portable X-ray imaging systems.
Researchers at the University of Illinois developed a novel single-step process to create three-dimensional (3D) texturing of graphene, increasing surface area. The 3D texturing enables expanded capabilities for electronics and biomaterials, including battery and supercapacitor applications.
University of Groningen scientists have successfully grown graphene on copper oxide, preserving its electronic properties. This achievement could pave the way for large-scale production of graphene devices using lithographic techniques.
Penta-graphene, a two-dimensional carbon allotrope composed exclusively of pentagons, has been discovered to possess high strength, thermal stability, and unusual properties. The material's unique structure inspired by the Cairo tiling may have applications in various fields.
Researchers at University of Manchester and University of Sheffield create see-through and efficient electronic devices using graphene and related materials. The new technology enables the creation of light-emitting devices that are incredibly thin, flexible, durable, and semi-transparent.
New research suggests that sinuous grain boundaries in graphene can relieve stress, resulting in enhanced mechanical strength and predictable electronic transport gaps. This discovery may lead to the development of polycrystalline graphene with precise misalignment of components, enabling the control of semiconducting characteristics.
A team of researchers has created a method to change graphene's electron density without physical alteration, enabling dynamic reconfiguring of circuit elements. This technique uses oxides to tune the amount of electrons in graphene, potentially revolutionizing semiconductor devices and optoelectronics.
A team of physicists at UC Riverside created magnetic graphene by bringing it close to a magnetic insulator, preserving its electronic properties. This breakthrough has the potential to increase graphene's use in computers with more robust and multi-functional electronic devices.
Researchers at Rice University have discovered a method to control the edge properties of graphene nanoribbons by manipulating the conditions under which they are pulled apart. This allows for the creation of semiconducting graphene with desirable electronic properties, opening up new possibilities for applications in modern electronics.
Scientists have demonstrated electrical control of energy flow from erbium ions into photons and plasmons using graphene. The research opens up novel types of nano-photonics devices based on active plasmonics, with potential for efficient data storage and manipulation.
Researchers at Rice University have developed stacked, three-dimensional supercapacitors using laser-induced graphene, which show excellent energy-storage capacity and power potential. The devices can be scaled up for commercial applications and offer flexibility and scalability benefits.
Researchers have successfully created heterostructures with varying widths of graphene nanoribbons using molecular self-assembly. This breakthrough could lead to the deployment of graphene in commercial electronic applications, taking advantage of its unique properties.
Scientists at Berkeley Lab and UC Berkeley have developed a new method to synthesize graphene nanoribbons from pre-designed molecular building blocks, enabling the creation of width-varying nanoribbons with enhanced properties. This breakthrough represents progress towards controllably assembling molecules into desired shapes.
Researchers at ICFO have discovered a material system that enables highly confined low-loss plasmons in graphene-boron nitride heterostructures, allowing for efficient optical sensing and computing. This breakthrough paves the way for extremely miniaturized optical circuits and devices.
Researchers have discovered GraphExeter, a graphene-based material that withstands extreme conditions, including high temperatures and humidity. This breakthrough could revolutionize the electronics industry by replacing indium tin oxide (ITO) with a more durable alternative.
Recent research on the fractional quantum Hall effect (FQHE) has made significant progress, including the observation of the 5/2 filling state in graphene. This state is an even denominator state that requires new theoretical concepts to understand its many-body physics. FQHE applications in quantum computing are also being explored.
Researchers developed a drug delivery technique using graphene strips to sequentially deliver two anticancer drugs, TRAIL and doxorubicin, targeting distinct parts of the cell. The technique significantly improved treatment efficacy compared to isolated therapies in mouse models targeting human lung cancer tumors.
A Northwestern University-led team found that graphene oxide (GO) films are soluble in water due to unintentional introduction of common contaminant aluminum ions during filtration. The positively charged ions stabilize the membranes, making them stronger and more stable.
Scientists at Penn State have discovered a miniscule vacuum gap that creates an energy barrier for electrons moving between layers of material. This gap is crucial for designing next-generation electronic devices, such as vertical tunneling field effect transistors.
The researchers found that sodium storage capacity of paper electrodes depends on the distance between individual layers, which can be tuned by heating it in argon or ammonia gas. They successfully demonstrated a flexible paper composed entirely of graphene oxide sheets that can charge and discharge with sodium-ions for more than 1,000...
Researchers design novel cathode for rechargeable lithium-sulfur batteries featuring graphene-wrapped sulfur electrode. The design improves cycling stability and efficiency by confining active materials within a porous structure.
Hydrogen transforms into a layered sheet structure resembling graphene at high pressures, exhibiting unique aromaticity and conductivity. This discovery validates earlier predictions made by chemists three decades ago, expanding our understanding of chemical bonding in extreme conditions.
Researchers have discovered that intercalating lead atoms on graphene creates a powerful magnetic field, revolutionizing spintronics. This property could enable the control of electron spins, leading to advancements in data storage and other applications.
The study finds that laser-induced graphene (LIG) has a unique structure with five- and seven-atom rings, which can store charges and make it suitable for supercapacitors. Researchers developed a scalable one-step process to create LIG in detailed patterns.
Scientists have created an innovative way to utilize atmospheric carbon dioxide to produce high-value materials for energy storage products. This breakthrough in nanotechnology enables the creation of nanoporous graphene, which has exceptional electrical conductivity and surface area.
Rice University scientists used a novel testing method to measure graphene's ability to absorb impact, finding it stretches before breaking. The technique, LIPIT, allows for rapid evaluation of nanoscale materials, with potential applications in body armor and spacecraft shielding.
Researchers at TUM develop a method to extract optically stored information from nitrogen-vacancy centers in nanodiamonds electronically. The technique uses a direct transfer of energy to a neighboring graphene layer, enabling picosecond electronic detection.
Researchers discovered that protons pass through ultra-thin graphene crystals surprisingly easily, making them attractive for proton-conducting membranes. This breakthrough could improve the efficiency and durability of fuel cells, which use oxygen and hydrogen to convert chemical energy into electricity.
Researchers fabricated a new substance from atomic sheets that interlock like Lego toy bricks, offering potential for next-generation materials. The material, made of graphene and tungsten disulfide, combines the good properties of each component layer, enabling efficient solar cells and flexible electronics.
Scientists at HZDR have discovered a seemingly paradoxical phenomenon in graphene when exposed to a magnetic field and laser light pulses. The electrons' energy levels behave unexpectedly due to collisions, causing an unusual rearrangement of the material's state.
Researchers at Northwestern University have developed a method to isolate atomically thin sheets of molybdenum disulfide (MoS2), a promising material for optoelectronics and electronics. The process uses copolymer-assisted gradient ultracentrifugation, allowing for scalable isolation of single-layer, bilayer, or trilayer MoS2 sheets.
The UK's National Physical Laboratory and the University of Manchester are collaborating to speed up the application of graphene, accelerating its commercialization through accurate metrology and characterisation. This partnership aims to establish a Joint Centre of Excellence and make the UK a leading authority on graphene standards.
Researchers at ETH Zurich create an artificial graphene system that breaks time-reversal symmetry using laser beams and ultracold atoms. This setup enables the testing of the topological Haldane model, a concept first proposed in 1988, and paves the way for new electronic applications.
Researchers have made the first direct observations of a one-dimensional boundary separating two different, atom-thin materials. This experiment provides the first experimental validation of theoretical interface properties.
Researchers have created a theoretical model to tune the conductivity of graphene zigzag nanoribbons by applying periodic ultra-short pulses. This could lead to the development of ultrafast electronic switches and graphene-based devices that only conduct electricity when an external pulse is applied.
Researchers at Berkeley Lab and UC Berkeley have developed a method to produce graphene nanopores with integrated optical antennas, enabling direct optical DNA sequence detection. This approach opens new avenues for simultaneous electrical and optical nanopore DNA sequencing and regulating DNA translocation.
A new class of conjugated polymers has been discovered, approaching disorder-free limits and enabling faster, more efficient flexible electronics. These materials could be used to create lightweight, flexible displays for smartphones and tablets.
Researchers have developed transparent graphene microelectrodes that enable real-time observation of neural circuits in epilepsy and other neurological disorders. This technology provides high spatial and temporal resolution, allowing for detailed analysis of seizure patterns and brain electrical activity.
Researchers at Kyoto University developed a novel method to assemble graphene into porous 3D structures, overcoming the challenge of maintaining unique material properties. The technique uses interfacial complexation with oppositely charged polymers, enabling tunable porosity and scalability for large-area films.
University of Illinois researchers use charged graphene to control the movement of DNA through a nanopore, allowing for faster and more accurate DNA sequencing. The study reveals that changing the graphene's charge can stop or speed up DNA movement, and even force it into specific conformations.
Researchers at MIT have discovered that crumpling graphene can create a stretchable supercapacitor that can store energy in flexible electronic devices. The material can be folded and stretched up to 1,000 times without losing performance.
Researchers developed a hybrid catalyst combining graphene quantum dots and graphene oxide, nitrogen, and boron, outperforming commercial platinum-based catalysts in fuel cells. The new material cuts the cost of generating energy with fuel cells, offering a promising solution to the expensive metal hurdle.