Articles tagged with Graphene
Researchers created a new ultracapacitor by combining graphene flakes with single-walled carbon nanotubes, resulting in three times higher specific capacitance. The hybrid structure's low costs and small size make it suitable for portable electronics and hybrid electric vehicles.
The team of researchers produced a stable porous membrane that is thinner than a nanometre, consisting of two layers of graphene on which tiny pores were etched. The membrane can permeate tiny molecules and may be used for waterproof clothing, water filtration, or gas separation.
Researchers have successfully observed the quantum phase transition of a superconductor-to-metal type in a graphene-based hybrid system. The system, consisting of tin nanodisks on a graphene substrate, exhibits a sharp drop in temperature at which the spatial phase coherence is destroyed solely by quantum fluctuations.
NTNU researchers have discovered that by tuning a small strain on single nanowires, they can become more effective in LEDs and solar cells. The discovery enables the creation of highly effective solar cells that produce a higher electric power.
Researchers at Rice University and Nanyang Technological University have developed a scalable CVD process for producing one-atom-thick layers of 2D molybdenum diselenide, a highly sought semiconductor. The new method offers improved electronic properties compared to similar materials like graphene.
Researchers have discovered conditions under which graphene nanoribbons can function as electronic switches. The study reveals that the transport gap, a critical factor for switch functionality, is inversely proportional to the ribbon's width and independent of crystallographic orientation.
Researchers at Rice University have developed a new hybrid material by combining carbon nanotubes with graphene, resulting in improved electrical and mechanical properties. The 'rebar graphene' technique enables large, flexible, conductive sheets of graphene to be manipulated more easily, making it a potential replacement for indium ti...
Scientists have successfully fabricated a photosensor using single layers of molybdenum disulfide (MoS2), which converts light into electricity at an extremely efficient rate. The material's large energy gap enables it to achieve high on/off ratios, making it suitable for future electronic devices.
Researchers at the University of Illinois have developed a novel solar cell architecture based on dense arrays of coaxial p-n junction InGaAs nanowires on InAs stems grown directly on graphene. The resulting ternary InGaAs NW arrays demonstrate a conversion efficiency of 2.51% under air mass 1.5 global solar illumination, representing ...
Researchers at SLAC and Stanford University discovered a potential way to make graphene superconducting, which could transform the engineering of materials for nanoscale electronic devices. They found that electrons scatter between graphene and calcium layers, interacting with natural vibrations to conduct electricity without resistance.
A room-temperature graphene light detector has been developed that can sense the full infrared spectrum without bulky cooling equipment. This technology could enable heat vision technology in contact lenses and expand vision capabilities.
Scientists have developed a water purifier that can remove pharmaceuticals, pesticides and other pollutants from drinking water using sunlight. The new technology combines titanium dioxide and graphene to create an easy-to-use system that could be incorporated into consumer products.
UC Riverside and University of Manchester researchers discover that adding a layer of graphene to each side of a copper film increases heat conducting properties by up to 24 percent. This enhancement could further help in the downscaling of electronics.
Researchers at the University of Warsaw have discovered a material called molybdenum disulfide with properties similar to those of graphene. This material has an energy gap, allowing it to be switched on and off, which could lead to significant energy savings in electronic devices.
Researchers at Vienna University of Technology have created the world's thinnest solar cells using tungsten diselenide, a material that can absorb light and convert it into electrical power. The ultrathin layers exhibit high transparency and efficiency, making them suitable for flexible displays and glass facades.
University of Cincinnati researchers have made a breakthrough in boosting the efficiency of polymer solar cells by adding graphene nanoflakes, increasing performance threefold. The new method aims to make solar-powered panels lighter, less expensive and more flexible.
Researchers at MIT developed a new method to create controlled-size holes in graphene sheets, enabling the production of highly selective filters for improved desalination. The graphene filters can sustain higher water flow rates than conventional membranes, making them suitable for efficient desalination and nanofiltration applications.
A new study reveals graphene's ability to absorb 90% more electromagnetic radiation, opening doors for secure wireless networks and improved communication devices. Researchers are now developing prototypes to translate this potential into practical applications.
Researchers have successfully produced artificial graphene from traditional semiconductor materials, opening up new possibilities for high-performance photovoltaic cells, lasers, LED lighting, and more. The discovery was made by a team of scientists at the University of Luxembourg and published in Physical Review X.
Researchers at the University of Manchester have discovered that graphene can be used to create ultrafast filters for liquid water, with an astonishingly accurate mesh that allows precise separation of atomic species. The filters also exhibit 'ion sponging' properties, sucking up small ions and concentrating them internally.
Scientists at the University of Vienna have unveiled the superconducting pairing mechanism in calcium-doped graphene using the Angle-resolved photoemission spectroscopy (ARPES) method. The findings reveal that calcium is the most promising candidate to induce superconductivity in graphene, with a critical temperature of about 1.5K.
Researchers at the University of Illinois Chicago have developed a graphene 'sandwich' that enables atomic-level imaging of biomolecules in their natural state. This breakthrough improves resolution and minimizes damage to samples, opening up analysis of difficult-to-image biological samples.
Researchers discovered graphene nanoribbons exhibit exceptional ballistic transport, allowing electrons to flow smoothly along the edges. This property could lead to ultra-fast computing and new types of electronic devices that exploit room temperature conductivity.
Researchers have developed a graphene water balloon to visualize hydrated protein molecules without freezing or slicing them. This technique allows for the capture of high-resolution images of ferritin, a protein critical for human health, which may lead to new treatments for diseases like Alzheimer's and cancer.
Belgian scientists applied a particle physics analogy to describe exciton behaviour in two graphene layers, mimicking parallel worlds. The approach reveals swapping effects between layers under specific electromagnetic conditions, similar to brane theory predictions.
Scientists at Rice University and Russia have calculated a road map for creating ultra-thin diamond films without high pressure. The 'phase diagram' outlines conditions necessary to turn stacked graphene sheets into flawless diamond lattices, with potential applications in nanocapacitors, electronics, and nano-optics.
Researchers at Rice University measured the speed and efficiency of excited 'hot' electrons drawn from gold nanoparticles into a sheet of graphene. They found that graphene accelerated damping of plasmons, shortening its lifetime, and calculated the electrons' transfer time.
A Kansas State University engineer has developed a composite paper that can efficiently store sodium atoms and serve as a flexible current collector in sodium-ion batteries. The paper offers stable charge capacity and eliminates the need for polymeric binders and copper current collectors.
Researchers have discovered a way to control heat flow using tiny triangular structures that can 'thermal rectify', allowing for greater flow of heat in one direction. The technology has potential applications in thermal management, electronics, and textiles.
Scientists have created a boron-based material called borophene, which could be stronger and more conductive than graphene. The material is formed from a triangular lattice structure with hexagonal vacancies, similar to the theoretical predictions made earlier.
Dr. Jeremy Robinson, a researcher at the Naval Research Laboratory, has won the Presidential Early Career Awards for Scientists and Engineers for his groundbreaking work on graphene. He is building on his brother's research to develop new sensors and applications for nanoelectronic communication.
Three students from Northwestern University created a device using pencil traces on paper to measure strain, while also detecting hazardous chemical vapors. The technology uses the conductive properties of graphene, which is shed when drawing on paper, to create a rudimentary electrode.
Researchers at Berkeley Lab have found a new form of quantum matter called a three-dimensional topological Dirac semi-metal (3DTDS) in sodium bismuthate, promising faster transistors and compact hard drives. The discovery features intriguing non-saturating linear magnetoresistance.
The study pioneers a new approach to forming a 2-D, single-atom sheet of two different materials with a seamless boundary. By rethinking traditional methods, researchers combined graphene and boron nitride into a single layer only one atom thick.
A UNIST research team has developed a method for the mass production of boron/nitrogen co-doped graphene nanoplatelets, which led to the fabrication of graphene-based field-effect transistors (FETs) with semiconducting nature. This breakthrough opens up opportunities for practical use in electronic devices.
Rice University scientists have developed a spray-on coating made from graphene nanoribbons that can melt ice on sensitive radar domes without interfering with radio frequencies. The material is also transparent and durable, making it a promising competitor to existing deicing technologies.
Researchers developed graphene-based nano-antennas that can connect devices powered by small amounts of scavenged energy, enabling nanoscale communication. The antennas operate at lower frequencies than traditional metallic components, reducing power needs.
The NUS team has successfully developed a one-step method to grow and transfer high-quality graphene on silicon substrates, opening up opportunities for its use in photonics and electronics. The 'face-to-face transfer' method enables the technological application of graphene in optoelectronic modulators, transistors, and biosensors.
A UNL-led team discovered that using small amounts of graphene oxide as a template improves carbon nanomaterials, leading to enhanced strength and other properties. The process could lower the cost of making composites significantly by requiring only small quantities of expensive nanoparticles.
Researchers have developed a new recipe for growing graphene, using a thin film of copper with massive crystalline grains. The large grains enable the material to survive high temperatures needed for graphene growth.
Scientists have developed a method to study individual sheets of graphene in a stack, even when they cover each other. By analyzing the polarization of reflected light, researchers can identify and characterize different graphene multilayers.
A new study by UWM researchers identified two features affecting electron transport in graphene: intrinsic ripples and the Schottky barrier. These characteristics impact the ability to control an electric current, making it challenging to engineer nanoscale transistors with graphene.
Researchers at Penn University have developed a new technique for fast and sensitive DNA sequencing using graphene nanoribbons with nanopores. The team's innovative method allows for faster measurement of DNA sequences, as the electrical current flowing through the ribbon is modulated by each base.
A team of Columbia researchers has developed a nano-mechanical system that can create FM signals, paving the way for more efficient cell phones and wireless communication. The device uses graphene's unique properties to tune frequency and overcome size limitations.
EPFL researchers have developed a new method for detecting individual DNA molecules using graphene nanoribbons, offering improved precision and potential for DNA sequencing. The technology has the potential to detect other types of proteins and provide information on their size and shape.
Researchers at UT Austin have grown centimeter-size single graphene crystals on copper using surface oxygen, increasing crystal size by 10,000 times. The crystals exhibit exceptional electrical properties, including high carrier mobility, which is crucial for electronic devices.
Researchers at City College of New York develop novel edge-contact geometry to bridge 3D world to 2D graphene without contaminating its properties. The technique enables remarkably low contact resistance, opening possibilities for device applications and pure physics studies.
Researchers create cleanest graphene by making electrical contact only along its 1D edge and using a contamination-free assembly technique. This results in improved performance, including high electron mobility and low sheet resistivity, making it suitable for electronic devices.
A Korean research team from Ulsan National Institute of Science and Technology (UNIST) developed a high-performance metal-free electrocatalyst for oxygen reduction reaction using covalently functionalized graphene nanosheets. The new catalyst shows superior stability compared to commercial Pt/C catalysts.
UCSB researchers demonstrate seamless designing of an atomically thin circuit with transistors and interconnects etched on a monolayer of graphene. The proposed all-graphene circuits have achieved higher noise margins and lower static power consumption compared to current CMOS technology.
A recommended nomenclature for 2D carbon materials has been published by the Editorial Board of Journal Carbon, aiming to standardize definitions and promote precise ideas. The new guidelines suggest using 'graphene materials' as an overarching term, including morphological descriptors for shape and size.
The Graphene Flagship aims to take graphene from academic labs to society, revolutionizing multiple industries and creating economic growth. The initiative includes 75 partners in 17 European countries, focusing on ICT, energy technology, and sensors.
Researchers developed a new method to create biomimetic membranes, allowing for the study of cell membrane functions and development of novel applications in medicine and biotechnology. The method uses lipid dip-pen nanolithography to write tailored patches of phospholipid membrane onto graphene substrates.
Scientists have successfully assembled model cell membranes on graphene surfaces using Lipid Dip-Pen Nanolithography (L-DPN). This breakthrough enables the study of complex systems and processes in a controlled environment.
Researchers at Rice University have created a polymer material infused with graphene nanoribbons that can contain pressurized gases for extended periods. The material has potential applications in the automotive industry, food packaging, and beverage containers.
Carbyne nanorods or nanoropes have a host of remarkable and useful properties, including surpassing the tensile strength of any other known material and having twice the tensile stiffness of graphene. Stretching carbyne alters its electronic band gap significantly, making it suitable for applications such as sensors and energy storage.
Researchers have discovered that graphene remains its conductive properties even when coated with silicon, a breakthrough for transparent solar cells. The study shows that the embedded graphene layer has a carrier mobility roughly 30 times greater than conventional zinc oxide-based contact layers.
Researchers at the University of South Carolina have developed a graphene oxide membrane less than 2 nanometers thick with high permeation selectivity between hydrogen and carbon dioxide gas molecules. The team's method allows for uniform coverage without inter-flake leaks, enabling thinner membranes that can efficiently separate gases.
Berkeley Lab researchers have developed a unique graphene liquid cell that enables the study of soft materials, including DNA and biological compounds. They have recorded the 3D motion of DNA connected to gold nanocrystals using transmission electron microscopy.
Researchers have developed a new production method for graphene that uses aromatic molecules, enabling the creation of flexible graphene structures with specific functionality. The method allows for the manufacture of quantum dots, nanoribbons, and other nano-geometries with unique properties.