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Categories: Engineering: Graphene

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Engineering: Graphene Physics: General Physics: Quantum Computing Physics: Quantum Physics
Published

Researchers demonstrate a high-speed electrical readout method for graphene nanodevices      (via sciencedaily.com)     Original source 

Graphene is often referred to as a wonder material for its advantageous qualities. But its application in quantum computers, while promising, is stymied by the challenge of getting accurate measurements of quantum bit states with existing techniques. Now, researchers have developed design guidelines that enable radio-frequency reflectometry to achieve high-speed electrical readouts of graphene nanodevices. 

Chemistry: Biochemistry Energy: Technology Engineering: Graphene Physics: General
Published

From a five-layer graphene sandwich, a rare electronic state emerges      (via sciencedaily.com)     Original source 

When stacked in five layers in a rhombohedral pattern, graphene takes on a rare 'multiferroic' state, exhibiting both unconventional magnetism and an exotic electronic behavior known as ferro-valleytricity.

Engineering: Graphene Physics: General
Published

Scientists discover 'flipping' layers in heterostructures to cause changes in their properties      (via sciencedaily.com)     Original source 

Transition metal dichalcogenide (TMD) semiconductors are special materials that have long fascinated researchers with their unique properties. For one, they are flat, one-atom-thick two-dimensional (2D) materials similar to that of graphene. They are compounds that contain different combinations of the transition metal group (e.g., molybdenum, tungsten) and chalcogen elements (e.g., sulfur, selenium, tellurium).

Computer Science: Quantum Computers Engineering: Graphene Physics: General Physics: Quantum Computing Physics: Quantum Physics
Published

Twisted science: New quantum ruler to explore exotic matter      (via sciencedaily.com)     Original source 

Researchers have developed a 'quantum ruler' to measure and explore the strange properties of multilayered sheets of graphene, a form of carbon. The work may also lead to a new, miniaturized standard for electrical resistance that could calibrate electronic devices directly on the factory floor, eliminating the need to send them to an off-site standards laboratory.   

Chemistry: Biochemistry Chemistry: Organic Chemistry Engineering: Graphene
Published

Graphene oxide reduces the toxicity of Alzheimer's proteins      (via sciencedaily.com)     Original source 

A probable early driver of Alzheimer's disease is the accumulation of molecules called amyloid peptides. These cause cell death, and are commonly found in the brains of Alzheimer’s patients. Researchers have now shown that yeast cells that accumulate these misfolded amyloid peptides can recover after being treated with graphene oxide nanoflakes.

Chemistry: Biochemistry Chemistry: General Chemistry: Inorganic Chemistry Energy: Technology Engineering: Graphene Engineering: Nanotechnology
Published

Researchers dynamically tune friction in graphene      (via sciencedaily.com)     Original source 

The friction on a graphene surface can be dynamically tuned using external electric fields, according to researchers.

Chemistry: Organic Chemistry Energy: Alternative Fuels Energy: Fossil Fuels Engineering: Graphene
Published

Efficient fuel-molecule sieving using graphene      (via sciencedaily.com) 

A research team has successfully developed a new method that can prevent the crossover of large fuel molecules and suppress the degradation of electrodes in advanced fuel cell technology using methanol or formic acid. The successful sieving of the fuel molecules is achieved via selective proton transfers due to steric hindrance on holey graphene sheets that have chemical functionalization and act as proton-exchange membranes.

Chemistry: General Chemistry: Inorganic Chemistry Energy: Batteries Energy: Technology Engineering: Graphene Physics: General
Published

One-atom-thick ribbons could improve batteries, solar cells and sensors      (via sciencedaily.com) 

Researchers created nanoribbons made of phosphorus and tiny amounts of arsenic, which they found were able to conduct electricity at temperatures above -140 degrees Celsius, while retaining the highly useful properties of the phosphorus-only ribbons.

Chemistry: Biochemistry Chemistry: General Chemistry: Inorganic Chemistry Engineering: Graphene Engineering: Nanotechnology
Published

Making contact: Researchers wire up individual graphene nanoribbons      (via sciencedaily.com) 

Researchers have developed a method of 'wiring up' graphene nanoribbons (GNRs), a class of one-dimensional materials that are of interest in the scaling of microelectronic devices. Using a direct-write scanning tunneling microscopy (STM) based process, the nanometer-scale metal contacts were fabricated on individual GNRs and could control the electronic character of the GNRs. The researchers say that this is the first demonstration of making metal contacts to specific GNRs with certainty and that those contacts induce device functionality needed for transistor function.

Chemistry: General Chemistry: Inorganic Chemistry Energy: Alternative Fuels Engineering: Graphene Environmental: General Geoscience: Environmental Issues Geoscience: Geochemistry
Published

Making hydrogen from waste plastic could pay for itself      (via sciencedaily.com) 

Researchers have found a way to harvest hydrogen from plastic waste using a low-emissions method that generates graphene as a by-product, which could help offset production costs.

Chemistry: General Chemistry: Organic Chemistry Energy: Alternative Fuels Energy: Batteries Engineering: Graphene Geoscience: Environmental Issues Geoscience: Geochemistry
Published

Efficient and mild: Recycling of used lithium-ion batteries      (via sciencedaily.com) 

Lithium-ion batteries (LIBs) provide our portable devices like tablets and mobiles -- and increasingly also vehicles -- with power. As the share of volatile renewable energy needing electricity storage increases, more and more LIBs are needed, lithium prices rise, resources dwindle, and the amount of depleted batteries that contain toxic substances increases. Researchers introduce a novel approach for the recovery of lithium from used LIBs.

Engineering: Graphene Physics: General Physics: Quantum Computing Physics: Quantum Physics
Published

Graphene: Perfection is futile      (via sciencedaily.com) 

It has long been known that graphene has excellent electronic properties. However, it was unclear until now how stable these properties are. Are they destroyed by disturbances and additional effects, which are unavoidable in practice, or do they remain intact? Scientists have now succeeded in developing a comprehensive computer model of realistic graphene structures. It turned out that the desired effects are very stable. Even graphene pieces that are not quite perfect can be used well for technological applications.

Engineering: Graphene Physics: General Physics: Quantum Computing Physics: Quantum Physics
Published

Golden rules for building atomic blocks      (via sciencedaily.com) 

Physicists have developed a technique to precisely control the alignment of supermoiré lattices by using a set of golden rules, paving the way for the advancement of next generation moiré quantum matter.

Computer Science: Quantum Computers Engineering: Graphene Engineering: Nanotechnology Physics: General Physics: Optics Physics: Quantum Computing Physics: Quantum Physics
Published

New quantum device generates single photons and encodes information      (via sciencedaily.com) 

A new approach to quantum light emitters generates a stream of circularly polarized single photons, or particles of light, that may be useful for a range of quantum information and communication applications. A team stacked two different, atomically thin materials to realize this chiral quantum light source.

Energy: Batteries Energy: Technology Engineering: Graphene
Published

New study finds ways to suppress lithium plating in automotive batteries for faster charging electric vehicles      (via sciencedaily.com) 

A new study has found a way to prevent lithium plating in electric vehicle batteries, which could lead to faster charging times.

Chemistry: Organic Chemistry Engineering: Graphene Geoscience: Environmental Issues
Published

Graphene discovery could help generate hydrogen cheaply and sustainably      (via sciencedaily.com) 

Researchers have finally solved the long-standing puzzle of why graphene is so much more permeable to protons than expected by theory.

Computer Science: General Computer Science: Quantum Computers Engineering: Graphene Engineering: Nanotechnology Physics: General Physics: Quantum Computing Physics: Quantum Physics
Published

Carbon-based quantum technology      (via sciencedaily.com) 

Graphene nanoribbons have outstanding properties that can be precisely controlled. Researchers have succeeded in attaching electrodes to individual atomically precise nanoribbons, paving the way for precise characterization of the fascinating ribbons and their possible use in quantum technology.

Chemistry: Organic Chemistry Engineering: Graphene
Published

Human scent receptors could help 'sniff out' nerve gases in new sensor      (via sciencedaily.com) 

By some estimates, the human nose can detect up to a trillion different smells with its hundreds of scent receptors. But even just catching a quick whiff of certain chemicals known as nerve agents can be lethal, even in tiny amounts. Researchers have now developed a sensitive and selective nerve gas sensor using these human scent receptors. It reliably detected a substitute for deadly sarin gas in simulated tests.

Engineering: Graphene Physics: Quantum Computing Physics: Quantum Physics
Published

Scientists caught Hofstadter's butterfly in one of the most ancient materials on Earth      (via sciencedaily.com) 

Researchers have revisited one of the most ancient materials on Earth -- graphite, and discovered new physics that has eluded the field for decades.