Sentences with word «nanoribbons»

«Many studies have predicted the properties of graphene nanoribbons with zigzag edges,» said Guangyu Zhang, senior author on the study.

«We are now able to watch as individual molecules join together to form nanoribbons of graphene and polymers.

It is now feasible to make a prized material for spintronic devices and semiconductors — monolayer graphene nanoribbons with zigzag edges.

That research team, led by PNNL's Chun - Long Chen, successfully achieved self - assembly of peptoids into networks of hexagonally patterned nanoribbons on a mineral surfaces.

Short summary: Researchers successfully achieved self - assembly of peptoids into networks of hexagonally patterned nanoribbons on a mineral surfaces.

Dagdeviren designed a flexible and stretchable sensor that uses nanoribbons to generate small charges to measure skin's elasticity.

The sensitivity of graphene bio-devices can be improved by using narrow graphene materials like nanoribbons.»

Hu, Ruan, and Chen also published a paper four years ago in the journal Nano Letters, among the first to propose asymmetric graphene nanoribbons as a thermal rectifier in research using the molecular dynamics simulations.

Although with their finite narrow width nanoribbons lack the 2D symmetry of large sheets of graphene, they are particularly attractive for electronic applications because it is possible to engineer their bandgap.

In racetrack devices, information - holding skyrmions would speed along a magnetic nanoribbon, like cars on the Indianapolis Motor Speedway.

PZT nanoribbons in the device generate small charges that measure skin elasticity, which indicates how well the skin is hydrated and how well a moisturizer is working.

Engineers at the University of Illinois at Urbana - Champaign and Northwestern University teamed up with cardiologists at the University of Arizona to develop what they call piezoelectric nanoribbons, which attach to the outside of the heart muscle, much like a Band - Aid.

Scientists funded by the NSF are working to synthesize, characterize and functionalize boron nitride nanotubes and boron nitride nanoribbons to create new electronic and optical materials with tunable properties.

Because the communication between each of the graphene nanoribbons takes place via an electromagnetic wave, instead of the physical movement of electrons, Friedman expects that communication will be much faster, with the potential for terahertz clock speeds.

The team synthesized nanoribbons of the new phase by simply heating the gold (III) chloride hydrate (HAuCl4) with a mixture of three organic solvents and then centrifuging and washing the product.

Doping, or chemically modifying, conductive nanotubes or nanoribbons changes their chemical bonding characteristics.

The researchers showed the same catalytic principles held true, but to lesser effect, for nanoribbons with armchair edges.

Nanotubes have an advantage over nanoribbons because of their curvature, which distorts chemical bonds around their circumference and leads to easier binding, the researchers found.

They also determined D - loops might be prevented entirely by starting with graphene nanoribbons rather than PAN.

At 1,500 degrees Celsius, the heat burns off all but the strongly bound carbon atoms, ultimately turning them into rudimentary graphene nanoribbons aligned in a way that prevents the ribbons from easily zipping into graphene's familiar honeycomb lattice.

Previously, researchers have tried to make graphene nanoribbons by placing sheets of graphene over a layer of silica and using atomic hydrogen to etch strips with zigzag edges, a process known as anisotropic etching.

The zigzag - edged nanoribbons showed high electron mobility in the range of 2000 cm2 / Vs even at widths of less than 10nm — the highest value ever reported for these structures — and created clean, narrow energy band gaps, which makes them promising materials for spintronic and nano - electronic devices.

In future studies, extending this method to other kinds of substrates could enable the quick large scale processing of monolayers of graphene to make high - quality nanoribbons with zigzag edges.

A graphen nanoribbon was anchored at the tip of a atomic force microscope and dragged over a gold surface.

«Smart» prosthetic skin made from silicon nanoribbons is reported this week in Nature Communications.

For instance, the nanofabrication of 2D graphene nanomesh [1], 1D graphene nanoribbons [2] and 0D graphene quantum dots [3], has paved the way for the development of the promising field of nanographene optoelectronics.

(Oct 2018) • Graphene nanoribbons enable ultra-sensitive mass detection (Apr 2017)

«Surface - Directed Assembly of Sequence - Defined Synthetic Polymers into Networks of Hexagonally Patterned Nanoribbons with Controlled Functionalities.»

The researchers found that like DNA and proteins, nanoribbons in solution naturally form folds and loops, but can also form helicoids, wrinkles and spirals.

In February researchers at the University of Illinois showed that nanoribbons of graphene could be cut in such a way that they could be turned on and off.

Sorkin and Su's calculations give further insights into these systems, indicating that as they point out in their report, «the intermediate structure experiences disintegration followed by a remarkable re-building process to form graphene nanoribbons with differently oriented grains.»

Ultimately, the model could be applied to semiconductors used as high - efficiency thermoelectrics, and to graphene nanoribbons used as heat sinks for so - called ultra large scale integration devices, such as computer microprocessors.

But there are ways to give the material a band gap, including using two separated strips of graphene fabricated as «nanoribbons.»

The researchers used an advanced simulation method called molecular dynamics to demonstrate thermal rectification in structures called «asymmetric graphene nanoribbons.»

Triangular graphene nanoribbons (a) are proposed as a new thermal rectifier, in which the heat flow in one direction is larger than that in the opposite direction.

From coal, soot and pencils to electronics, nanoribbons and atom - thick semiconductors — carbon is turning out to be even more talented than we thought

Various methods of making graphene - based field effect transistors (FETs) have been exploited, including doping graphene tailoring graphene - like a nanoribbon, and using boron nitride as a support.

In Friedman's spintronic circuit design, electrons moving through carbon nanotubes — essentially tiny wires composed of carbon — create a magnetic field that affects the flow of current in a nearby graphene nanoribbon, providing cascaded logic gates that are not physically connected.

In addition, a magnetic field near a two - dimensional ribbon of carbon — called a graphene nanoribbon — affects the current flowing through the ribbon.

In each group, roughly 30 percent more of the nanoribbons carried the chirality of the light they were exposed to.

Graphene nanoribbons are synthesized on a gold surface and interconnected to create a well - defined pore network.

One research group first stuck the nanotubes to a polymer film, then used argon gas to etch away a strip from each tube to produce the nanoribbons.

The Rice researchers, including lead author and former postdoctoral associate Xiaolong Zou and graduate student Luqing Wang, used computer simulations to discover why graphene nanoribbons and carbon nanotubes modified with nitrogen and / or boron, long studied as a substitute for expensive platinum, are so sluggish and how they can be improved.

«While doped nanotubes show good promise, the best performance can probably be achieved at the nanoribbon zigzag edges where nitrogen substitution can expose the so - called pyridinic nitrogen, which has known catalytic activity,» Yakobson said.

Nitrogen - doped carbon nanotubes or modified graphene nanoribbons may be suitable replacements for platinum for fast oxygen reduction, the key reaction in fuel cells that transform chemical energy into electricity, according to Rice University researchers.

They also showed co-doping graphene nanoribbons with nitrogen and boron enhances the oxygen - absorbing abilities of ribbons with zigzag edges.

This top - down approach to making graphene is quite different from previous works by Tour's lab, which pioneered the small - scale manufacture of the atom - thick material from common carbon sources, even Girl Scout cookies, and learned to split multiwalled nanotubes into useful graphene nanoribbons.