Moiré effect: How to twist material properties

The discovery of the material graphene, which consists of only one layer of carbon atoms, was the starting signal for a global race: Today, so-called “2D materials” are produced, made of different types of atoms. Atomically thin layers that often have very special material properties not found in conventional, thicker materials. Now another chapter is…

A new, positive approach could be the key to next-generation, transparent electronics: Filling a crucial gap in the materials spectrum

A new study, out this week, could pave the way to revolutionary, transparent electronics. Such see-through devices could potentially be integrated in glass, in flexible displays and in smart contact lenses, bringing to life futuristic devices that seem like the product of science fiction. For several decades, researchers have sought a new class of electronics…

Less than a nanometer thick, stronger and more versatile than steel

Scientists create stable nanosheets containing boron and hydrogen atoms with potential applications in nanoelectronics and quantum information technology. What’s thinner than thin? One answer is two-dimensional materials — exotic materials of science with length and width but only one or two atoms in thickness. They offer the possibility of unprecedented boosts in device performance for…

Entropy measurements reveal exotic effect in ‘magic-angle’ graphene: Researchers discover a surprising phase transition in twisted bilayer graphene

Most materials go from being solids to liquids when they are heated. One rare counter-example is helium-3, which can solidify upon heating. This counterintuitive and exotic effect, known as the Pomeranchuk effect, may now have found its electronic analogue in a material known as magic-angle graphene, says a team of researchers from the Weizmann Institute…

A breakthrough that enables practical semiconductor spintronics

It may be possible in the future to use information technology where electron spin is used to store, process and transfer information in quantum computers. It has long been the goal of scientists to be able to use spin-based quantum information technology at room temperature. A team of researchers from Sweden, Finland and Japan have…

Graphene: Everything under control in a quantum material

How can large amounts of data be transferred or processed as quickly as possible? One key to this could be graphene. The ultra-thin material is only one atomic layer thick, and the electrons it contains have very special properties due to quantum effects. It could therefore be very well suited for use in high-performance electronic…

Optically active defects improve carbon nanotubes: Scientists achieve defect control with a new reaction pathway

The properties of carbon-based nanomaterials can be altered and engineered through the deliberate introduction of certain structural “imperfections” or defects. The challenge, however, is to control the number and type of these defects. In the case of carbon nanotubes — microscopically small tubular compounds that emit light in the near-infrared — chemists and materials scientists…

Following atoms in real time could lead to better materials design

Researchers have used a technique similar to MRI to follow the movement of individual atoms in real time as they cluster together to form two-dimensional materials, which are a single atomic layer thick. The results, reported in the journal Physical Review Letters, could be used to design new types of materials and quantum technology devices.…

Unlocking richer intracellular recordings

Behind every heartbeat and brain signal is a massive orchestra of electrical activity. While current electrophysiology observation techniques have been mostly limited to extracellular recordings, a forward-thinking group of researchers from Carnegie Mellon University and Istituto Italiano di Tecnologia has identified a flexible, low-cost, and biocompatible platform for enabling richer intracellular recordings. The group’s unique…

Water purification system engineered from wood, with help from a microwave oven

Researchers in Sweden have developed a more eco-friendly way to remove heavy metals, dyes and other pollutants from water. The answer lies in filtering wastewater with a gel material taken from plant cellulose and spiked with small carbon dots produced in a microwave oven. Reporting in the journal Sustainable Materials and Technologies, researchers from KTH…

Physicists map new route to control sound in thin films

A theoretical path to make artificial composite thin films in which sound waves can be stopped, reversed and even stored for later use has been accomplished by University of Oregon physicists. Postdoctoral researcher Pragalv Karki and Jayson Paulose, an assistant professor of physics, focused on mechanical vibrations in thin elastic plates, the building blocks for…

2D nanomaterial MXene: The perfect lubricant: In extreme heat or in the vacuum of space: a novel nanomaterial delivers top performance in extreme situations, as demonstrated by TU Wien (Vienna) with international partners

You can lubricate a bicycle chain with oil, but what do you do with a Mars rover or a red-hot conveyor belt in the steel industry? Very special nanomaterials have now been studied by the TU Wien together with research groups from Saarbrücken (Germany), Purdue University in the USA and the Universidad de Chile (Santiago,…

Identification of the wettability of graphene layers at the molecular level

Graphene is a two-dimensional material in which carbon atoms are arranged in hexagonal structures, and it has unique physical and chemical properties such as sub-nanometer thickness, chemical stability, mechanical flexibility, electrical and thermal conductivity, optical transparency, and selective permeability to water. Due to these properties, various applications of graphene in transparent electrodes, desalination, electrical energy…

Fully recyclable printed electronics developed: New technique reclaims nearly 100% of all-carbon-based transistors while retaining future functionality of the materials

Engineers at Duke University have developed the world’s first fully recyclable printed electronics. By demonstrating a crucial and relatively complex computer component — the transistor — created with three carbon-based inks, the researchers hope to inspire a new generation of recyclable electronics to help fight the growing global epidemic of electronic waste. The work appears…

New two-dimensional material

An international team with researchers from the University of Bayreuth has succeeded for the first time in discovering a previously unknown two-dimensional material by using modern high-pressure technology. The new material, beryllonitrene, consists of regularly arranged nitrogen and beryllium atoms. It has an unusual electronic lattice structure that shows great potential for applications in quantum…

Silicon could be a photonics game-changer

New research from the University of Surrey has shown that silicon could be one of the most powerful materials for photonic informational manipulation — opening up new possibilities for the production of lasers and displays. While computer chips’ extraordinary success has confirmed silicon as the prime material for electronic information control, silicon has a reputation…

A path to graphene topological qubits

In the quantum realm, electrons can group together to behave in interesting ways. Magnetism is one of these behaviors that we see in our day-to-day life, as is the rarer phenomena of superconductivity. Intriguingly, these two behaviors are often antagonists, meaning that the existence of one of them often destroys the other. However, if these…

Intranasal influenza vaccine enhances immune response and offers broad protection

An influenza vaccine that is made of nanoparticles and administered through the nose enhances the body’s immune response to influenza virus infection and offers broad protection against different viral strains, according to researchers in the Institute for Biomedical Sciences at Georgia State University. Recurring seasonal flu epidemics and potential pandemics are among the most severe…

Stabilization of the borafluorene anion with carbenes

The incorporation of boron into polycyclic aromatic hydrocarbon systems leads to interesting chromophoric and fluorescing materials for optoelectronics, including organic light-emitting diodes (OLEDS) and field-effect transistors, as well as polymer-based sensors. In the journal Angewandte Chemie, a research team has now introduced a new anionic organoborane compound. Synthesis of the borafluorene succeeded through the use…

Towards 2D memory technology by magnetic graphene

In spintronics, the magnetic moment of electrons (spin) is used to transfer and manipulate information. An ultra-compact 2D spin-logic circuitry could be built from 2D materials that can transport the spin information over long distances and also provide strong spin-polarization of charge current. Experiments by physicists at the University of Groningen (The Netherlands) and Colombia…

In graphene process, resistance is useful

A Rice University laboratory has adapted its laser-induced graphene technique to make high-resolution, micron-scale patterns of the conductive material for consumer electronics and other applications. Laser-induced graphene (LIG), introduced in 2014 by Rice chemist James Tour, involves burning away everything that isn’t carbon from polymers or other materials, leaving the carbon atoms to reconfigure themselves…

Graphene key for novel hardware security

As more private data is stored and shared digitally, researchers are exploring new ways to protect data against attacks from bad actors. Current silicon technology exploits microscopic differences between computing components to create secure keys, but artificial intelligence (AI) techniques can be used to predict these keys and gain access to data. Now, Penn State…

Stabilizer residue in inks found to inhibit conductivity in 3D printed electronic

Inks containing metal nanoparticles are among the most commonly-used conductive materials for printed electronics. Ink-jetting layers of MNP materials allows for unpreceded design flexibility, rapid processing and 3D printing of functional electronic devices such as sensors, solar panels, LED displays, transistors and smart textiles. Inkjet 3D printing of metals typically form a solid printed object…

Scaling down Ionic Transistors to the ultimate limit

The human brain is a vast network of billions of biological cells called neurons which fires electrical signals that process information, resulting in our sense and thoughts. The ion channels of atomic scale in each neuron cell membrane plays a key role in such firings that opens and closes the ion flow in an individual…

New atomically precise graphene nanoribbon heterojunction sensor developed

An international research team led by the University of Cologne has succeeded for the first time in connecting several atomically precise nanoribbons made of graphene, a modification of carbon, to form complex structures. The scientists have synthesized and spectroscopically characterized nanoribbon heterojunctions. They then were able to integrate the heterojunctions into an electronic component. In…

A new form of carbon opens door to nanosized wires: New type of atomically thin carbon material

Carbon exists in various forms. In addition to diamond and graphite, there are recently discovered forms with astonishing properties. For example graphene, with a thickness of just one atomic layer, is the thinnest known material, and its unusual properties make it an extremely exciting candidate for applications like future electronics and high-tech engineering. In graphene,…

Engineering matter at the atomic level

As devices continue to be built on an increasingly small scale, scientists are looking toward developing ways to engineer materials at the atomic level. In a breakthrough that will contribute to this, published in Nature Communications, researchers from the RIKEN Cluster for Pioneering Research and RIKEN Center for Advanced Photonics, along with collaborators, have developed…

Quantum electronics: ‘Bite’ defects in bottom-up graphene nanoribbons

Graphene nanoribbons (GNRs), narrow strips of single-layer graphene, have interesting physical, electrical, thermal, and optical properties because of the interplay between their crystal and electronic structures. These novel characteristics have pushed them to the forefront in the search for ways to advance next-generation nanotechnologies. While bottom-up fabrication techniques now allow the synthesis of a broad…