Articles tagged with Graphene
A new composite material made with graphene is stronger and more durable than traditional concrete, while also significantly reducing its carbon footprint. The innovation has the potential to modernize the construction industry worldwide.
Researchers at ICFO have achieved the ultimate level of light confinement using graphene, creating ultra-small optical switches and sensors. By sending infra-red light through devices, they observed how plasmons propagated in between metal and graphene, demonstrating control of light guided in channels smaller than one nanometer.
Researchers at ICFO have successfully confined light to a space one atom thick, setting a new record. They used graphene and other 2D materials to create an optical device that can control light in channels smaller than one nanometer.
Researchers found that graphene's Poisson ratio, which determines material capability to shrink or extend in transverse dimension, varies depending on the applied tensile force. This discovery could help create new materials with required exotic properties and improve existing technologies.
A Japanese research team has developed an automated robot that greatly speeds up the collection and assembly of 2D crystals to form van der Waals heterostructures. The robot can detect 400 graphene flakes an hour, stacking four layers in just a few minutes with minimal human input.
Researchers at MIT have developed a continuous manufacturing process to produce long strips of high-quality graphene. The team's results are the first demonstration of an industrial, scalable method for manufacturing high-quality graphene suitable for membrane applications.
Scientists have developed a method to modify graphene without destroying it, creating a stable structure called 'polymer carpets'. When exposed to light, these carpets generate current, making them suitable for use in solar batteries and flexible electronics.
Researchers at Chalmers University of Technology have discovered that a layer of vertical graphene flakes can form a protective surface that kills bacteria, preventing infections and eliminating the need for antibiotic treatment. The graphene flakes are sharp enough to slice apart bacteria without harming human cells.
A team of physicists has successfully imaged individual impurity atoms in graphene ribbons using atomic force microscopy. The technique allowed them to identify boron and nitrogen atoms, expanding graphene's properties for applications like transistors and circuits.
Researchers investigated the oxidative unzipping mechanism of MWCNTs, revealing an intercalation-driven process. The study showed that controlling the KMnO4/MWCNT ratio and reaction time allows for the production of GNRs with varying properties, from multi-layered graphenic nanoribbons to single-layered GONRs.
Researchers from MIPT have created biosensor chips based on copper and graphene oxide, achieving unmatched sensitivity. The innovative design enables compact devices compatible with microelectronics technology, opening up new avenues for bio-sensing applications.
Researchers have developed highly integrated graphene blackbody emitters with a fast response time of ~100 ps, outperforming previous emitters. The emitters' properties are controlled by the number of graphene layers and can be used for real-time optical communication.
Kansai researchers successfully synthesized hexa-peri-hexabenzo[7]helicene, the first helically twisted chiral graphene. The discovery offers promising applications in nanomechanics and has unique electronic structure properties.
Scientists at Rice University have developed a method to produce strong, lightweight graphite pellets without the need for high-temperature processing. The pellets exhibit good conductivity and stability in various conditions, making them suitable for applications such as conducting cables and electrodes.
Researchers at Nagoya University have developed a method to construct perfectly aligned molecular assembly structures on graphenes. The technique relies on atomic force microscopy (AFM) and induces symmetry breaking in molecular patterns, enabling precise control over molecular alignment.
Researchers developed a new type of quantum dot allowing for highly tunable energy levels of confined electrons, enabling potential applications in valleytronics. The discovery uses a combination of graphene and hexagonal boron nitride materials.
Researchers at University of Illinois Chicago developed graphene-oxide coated nanosheets to regulate lithium deposition, extending battery life and safety
A Northwestern University team has developed a new hair dye using graphene that is non-toxic and non-damaging to hair. The dye works as well as commercial permanent dyes without chemically altering hairs, and it also offers anti-static properties.
Researchers have developed a graphene-based hair dye that adheres to the surface of hair, forming a coating resistant to at least 30 washes without chemicals. This coating also dissipates static electricity, eliminating flyaways.
Researchers have discovered graphene nanoflakes that can exploit quantum effects to modulate current flow. The flakes also exhibit new magnetic properties, enabling the creation of spin currents and potential applications in spintronics.
Researchers at Rice University have developed a new 'white graphene' architecture that can store hydrogen with unprecedented capacity in boron nitride nanomaterials. The optimal design features a specific spacing and arrangement of boron nitride sheets and pillars, resulting in improved hydrogen absorption and release capabilities.
A new technique allows for the growth of large, single-crystal-like graphene films over a foot long, enabling high-quality two-dimensional materials necessary for practical applications. The novel approach harnesses an evolutionary 'survival of the fittest' competition among crystals to produce uniform and robust graphene.
Researchers have developed graphene-based nanoscrolls with a large surface area, stability at high temperatures and durability. The material mimics the capillary structure in a dog's nose to detect odors at extremely low concentrations.
Researchers have found that graphene can be tuned to behave as an insulator or a superconductor, exhibiting unusual electronic properties. By creating a 'superlattice' of stacked graphene sheets, the team demonstrated intrinsic superconductivity in pure carbon-based material.
Scientists have developed a way to write graphene patterns onto virtually any surface, including food, using a new laser technique. This technology could enable edible electronics that track food origin, storage, and safety, as well as detect harmful organisms like E. coli.
Researchers at Rice University have found that graphene catalysts contain trace amounts of manganese, which activates the oxygen reduction reaction and improves fuel-cell efficiency. The study used inductively coupled plasma mass spectrometry to detect manganese atoms in samples made by the Rice lab.
The University of California - Santa Barbara team designed a new spiral inductor made of multiple layers of graphene, which offers one-and-a-half times the inductance density of traditional inductors. This innovative design enables a one-third reduction in size while maintaining high efficiency.
Researchers at Florida State University have developed a new strategy for synthesizing olympicene, a highly versatile molecule with potential applications in nanoscale materials. The breakthrough, published in Angewandte Chemie, enables the production of structurally precise carbon-rich nanostructures.
CSIRO scientists have developed a new filtering technique using Graphair that can remove almost all contaminants from water in a single step. The breakthrough technology has the potential to provide clean drinking water for millions of people worldwide who currently lack access to safe drinking water.
Rice University scientists have developed a technique to write graphene patterns onto various materials, including food, paper, and cloth. The new method uses laser-induced graphene (LIG) to create conductive identification tags and sensors that can be embedded into products.
Researchers have synthesized a water-soluble warped nanographene that exhibits photodynamic properties, killing human cells upon irradiation. The material's biocompatibility and fluorescence make it suitable for bioimaging and potential therapeutic applications.
Researchers at Tohoku University have fabricated two types of trilayer graphene with different electrical properties. The ABA-stacked graphene exhibits excellent electrical conductivity, while the ABC-stacked graphene displays semi-conducting properties. These findings hold implications for the development of novel electronic devices.
Researchers have created a graphene-based radiation detector with a fast response time and the ability to work over a wide range of temperatures. The device exploits graphene's thermoelectric properties, generating an electric field that provides a direct measurement of radiation.
Researchers at Clemson University have developed a wireless energy generation device called W-TENG, which generates electricity from motion and vibrations. The device uses graphene-PLA fiber and can generate enough voltage to power standard electrical outlets or store energy wirelessly in capacitors.
Researchers at the University of Warwick have discovered a new approach to replace graphite in lithium-ion batteries using silicon reinforced with graphene girders. This could more than double the battery's life and increase its capacity.
Researchers at Iowa State University have developed a new graphene printing technology that produces electronic circuits with low cost, flexibility, and conductivity. The technology uses laser processing to create water-repelling surfaces on graphene flakes, opening up possibilities for self-cleaning wearable electronics and sensors.
Northwestern University researchers have created a new battery using crumpled graphene balls, which can accommodate fluctuation of lithium as it cycles between the anode and cathode. This approach avoids lithium dendrite growth, increasing battery performance and capacity.
Researchers at Saarland University successfully measured the mechanical properties of free-standing single-atom-thick graphene membranes. The study provides direct evidence for the unique mechanical stability of these materials, which is crucial for their potential applications in various technological sectors.
Physicists at the University of Sussex have developed a new, affordable, and non-invasive wearable health monitor that can detect heart and breathing abnormalities in babies. The technology uses graphene-based liquid sensors to track vital signs wirelessly.
Engineers at Iowa State University have developed a new type of wearable sensor for plants, using graphene technology to measure water use in crops. The sensors are made by patterning and transferring graphene-based nanomaterials onto tape, allowing for precise measurements of transpiration from leaves.
Trisodium bismuthide (Na3Bi) has been found to have an electronically smooth nature similar to graphene, allowing it to maintain high electron mobility. This discovery opens up possibilities for the advancement of topological materials and their applications in electronics.
Researchers Ana María Valencia García and Marília Junqueira Caldas resolved a longstanding controversy about the calculation of defect electronic structures in graphene. They used a hybrid functional method, which yielded results compatible with experimental data, resolving divergences between different simulation methods.
Researchers at CUNY's Advanced Science Research Center discovered a process to create a diamond-like material from two-layer graphene that becomes harder than diamond upon impact. This innovation has potential applications in wear-resistant protective coatings and ultra-light bullet-proof films.
Researchers detected graphene's out-of-plane heat transfer in van der Waals heterostructures, with implications for ultra-fast photodetectors and optoelectronic device design. The phenomenon relies on hot electrons and hyperbolic phonons in the hBN layer.
Scientists have discovered a new process to layer metals under graphite, leading to unique mesas with potential applications in quantum computing and sensing. The formation of these structures could enable controlled magnetic and electronic properties.
The Graphene Flagship has successfully tested graphene for two space-related applications: loop heat pipes and solar sails. The experiments, conducted in microgravity, showed excellent thermal properties and radiation pressure behavior, paving the way for a commercial product.
Researchers have successfully engineered artificial graphene in a nanofabricated semiconductor structure, offering more versatile properties than natural graphene. This breakthrough could lead to the development of new electronic switches, transistors, and storage methods based on exotic quantum mechanical states.
Researchers predict and demonstrate a giant spin anisotropy in graphene, paving the way for new spintronic logic devices. This phenomenon enables control over the lifetime of different spin orientations in graphene.
Researchers develop new method to produce nanoribbons of graphene, essential for smaller electronic devices. The process uses ultraviolet light and 600-degree heat to create narrow strips of graphene with a bandgap.
Researchers have developed graphene nano tweezers that can efficiently trap individual biomolecules, opening up new possibilities for point-of-care diagnostics. The technology has the potential to be miniaturized into a single microchip and operate on portable devices like smartphones.
Rodney S. Ruoff, a renowned researcher at UNIST, has been awarded the James C. McGroddy Prize for his groundbreaking work on scalable synthesis and applications of graphene and its derivatives. With over 141,000 citations, Ruoff is considered one of the most prolific researchers in the field.
Scientists have successfully observed and followed real-time heat transport in van der Waals stacks, where graphene is encapsulated by hexagonal BN. The heat actually flows to the surrounding hBN sheets on an ultrafast timescale of picoseconds, dominating competing heat transfer processes.
Researchers have successfully grown graphene nanoribbons with a regular armchair edge, exhibiting a precisely defined energy gap. This enabled the integration of these structures into nanotransistors, overcoming previous challenges related to dielectric layers and ribbon alignment.
Researchers have developed ultra-thin and flat graphene metalenses that can concentrate terahertz beams to a spot, flip their polarization and modulate their intensity. These devices have the potential to revolutionize applications such as amplitude tunable lenses, lasers and dynamic holography.
Scientists have developed a method to print electronic circuits on fabric using graphene-based inks, creating flexible, washable, and breathable wearable devices. The technology has the potential to revolutionize the textile industry with applications in healthcare, energy harvesting, and fashion.
Researchers discovered a new route to ultra-low-power transistors using graphene-based composite materials, achieving fine electrical control over the electron's spin. The discovery has the potential to lead to much-needed low-energy consumption electronics.
Pillared graphene's thermal transport was found to be faster with wrinkles due to reduced phonon scattering. The optimal configuration involves three octagons instead of six heptagons, facilitating a smoother turn without significantly stressing the graphene.
Researchers at Chalmers University have developed a flexible terahertz detector using graphene transistors on plastic substrates. The device detects signals in the frequency range of 330 to 500 gigahertz, opening up various applications including imaging sensors and wireless communications.
Researchers at the University of Sussex have created a new method for making smart phone touch screens that are cheaper, less brittle, and more environmentally friendly. The breakthrough involves combining silver nanowires with graphene to create a hybrid material that matches existing technologies at a fraction of the cost.
Mahmooda Sultana, a NASA research engineer, has been named IRAD Innovator of the Year for her groundbreaking work on nanomaterials and detectors. She is expanding her research to develop quantum-dot technology and 3-D printed sensor platforms.