#Graphene-coated'e textile'detects noxious gases Scientists in Korea have developed wearable, graphene-coated fabrics that can detect dangerous gases present in the air,
alerting the wearer by turning on an LED light("Ultrasensitive and Highly Selective Graphene-Based Single Yarn for Use in Wearable Gas Sensor").
"The researchers, from the Electronics and Telecommunications Research Institute and Konkuk University in the Republic of korea, coated cotton and polyester yarn with a nanoglue called bovine serum albumin (BSA.
Graphene is an incredibly strong one-atom-thick layer of carbon, and is known for its excellent conductive properties of heat and electricity.
and this method provides a straightforward way to make semiconducting nanoscale circuits from graphene, a form of carbon only one atom thick.
when graphene grows on germanium, it naturally forms nanoribbons with these very smooth, armchair edges,"said Michael Arnold, an associate professor of materials science and engineering at UW-Madison."
"Graphene, a one-atom-thick, two-dimensional sheet of carbon atoms, is known for moving electrons at lightning speed across its surface without interference.
As a semimetal, graphene naturally has no band-gaps, making it a challenge for widespread industry adoption.
graphene and it shows some characteristic electronic properties, "said Kiraly.""What's even more interesting is that these nanoribbons can be made to grow in certain directions on one side of the germanium crystal,
and graphene that may play a role e
#Experimental treatment regimen effective against HIV PROTEASE inhibitors are a class of antiviral drugs that are used commonly to treat HIV, the virus that causes AIDS.
#Ultrasensitive sensors made from boron-doped graphene Ultrasensitive gas sensors based on the infusion of boron atoms into graphene--a tightly bound matrix of carbon atoms--may soon be possible, according to an international team of researchers
Graphene is known for its remarkable strength and ability to transport electrons at high speed, but it is also a highly sensitive gas sensor.
reported today in the Proceedings of the National Academy of Sciences("Ultrasensitive gas detection of large-area boron-doped graphene),
"We were previously able to dope graphene with atoms of nitrogen, but boron proved to be much more difficult.
Once we were able to synthesize what we believed to be boron graphene, we collaborated with experts in the United states
confirmed the presence of the boron atoms in the graphene lattice and their effect when interacting with ammonia or nitrogen oxide molecules.
theoretical work indicates that boron-doped graphene could lead to improved lithium-ion batteries and field-effect transistors, the authors report t
#Novel'crumpling'of hybrid nanostructures increases SERS sensitivity By"crumpling"to increase the surface area of graphene-gold nanostructures,
an assistant professor of mechanical science and engineering at Illinois."This mechanical self-assembly strategy will enable a new class of 3d crumpled graphene-gold (Au) nanostructures.
"This work demonstrates the unique capability of micro-to-nanoscale topographies of the crumpled graphene-Au nanoparticles--higher density,
""We achieve a 3d crumpled graphene-Au hybrid structure by the delamination and buckling of graphene on a thermally activated, shrinking polymer substrate.
This process enables precise control and optimization of the size and spacing of integrated Au nanoparticles on crumpled graphene for higher SERS enhancement."
"According to Nam, the 3d crumpled graphene-Au nanostructure exhibits at least one order of magnitude higher SERS detection sensitivity than that of conventional, flat graphene-Au nanoparticles.
The hybrid structure is adapted further to arbitrary curvilinear structures for advanced, in situ, nonconventional, nanoplasmonic sensing applications."
An earlier study by Nam's research group was the first to demonstrate graphene integration onto a variety of different microstructured geometries,
and the 3d integration of gold nanoparticle/graphene hybrid structures r
#Facebook M Is trained and Monitored by Humans, Facebook Reveals Facebook has entered the virtual digital assistant space with a new service for its millions of Messenger users,
The Stanford team ended up using our old friend graphene to play the cathode to aluminum's anode.
and this method provides a straightforward way to make semiconducting nanoscale circuits from graphene, a form of carbon only one atom thick.
when graphene grows on germanium, it naturally forms nanoribbons with these very smooth, armchair edges,"said Michael Arnold, an associate professor of materials science and engineering at UW-Madison."
"Graphene, a one-atom-thick, 2-D sheet of carbon atoms, is known for moving electrons at lightning speed across its surface without interference.
As a semimetal, graphene naturally has no band-gaps, making it a challenge for widespread industry adoption.
graphene and it shows some characteristic electronic properties, "said Kiraly.""What's even more interesting is that these nanoribbons can be made to grow in certain directions on one side of the germanium crystal,
and graphene that may play a role. This research is detailed in a paper published in Nature Communications s
#Cobalt atoms on graphene a powerful combo Graphene doped with nitrogen and augmented with cobalt atoms has proven to be an effective, durable catalyst for the production of hydrogen from water, according to scientists at Rice Univ. The Rice lab of chemist James Tour and colleagues at the Chinese Academy of Sciences,
They tested nitrogen-doped graphene on its own and found it lacked the ability to kick the catalytic process into gear.
Atom-thick graphene is the ideal substrate, Tour said, because of its high surface area, stability in harsh operating conditions and high conductivity.
#Nanoquakes probe new 2-D material In a step towards a post-graphene era of new materials for electronic applications,
'fluffy'carbon electrode made from graphene (comprising one-atom-thick sheets of carbon atoms), and additives that alter the chemical reactions at work in the battery,
changing it to a highly porous form of graphene, adding lithium iodide, and changing the chemical makeup of the electrolyte,
and smartphones, was reached by using a'fluffy'carbon electrode made from graphene. What's more, by changing the chemical mix from earlier versions of lithium-air batteries,
with many graphene edges that proved to be crucial to catalysis."This is a low-cost, one-step, scalable process,
#Graphene pushes the speed limit of light-to-electricity conversion ICFO researchers Klaas-Jan Tielrooij, Lukasz Piatkowski,
have demonstrated now that a graphene-based photodetector converts absorbed light into an electrical voltage at an extremely high speed.
The study, entitled"Generation of photovoltage in graphene on a femtosecond timescale through efficient carrier heating"
Facilitated by graphene's nonlinear photo-thermoelectric response, these elements enabled the observation of femtosecond photodetection response times."
"The ultrafast creation of a photovoltage in graphene is possible due to the extremely fast and efficient interaction between all conduction band carriers in graphene.
Next, the electron heat is converted into a voltage at the interface of two graphene regions with different doping.
"it is amazing how graphene allows direct nonlinear detecting of ultrafast femtosecond (fs) pulses.""The results obtained from the findings of this work,
which has been funded partially by the EC Graphene Flagship, open a new pathway towards ultra-fast optoelectronic conversion.
Koppens comments,"Graphene photodetectors keep showing fascinating performances addressing a wide range of applications
#Protein finding can pave way for improved treatment of malignant melanoma New research now demonstrates that the presence of the protein megalin in a malignant melanoma is an indicator of cancer cells that are particularly aggressive.
#Researchers add a new wrinkle to cell culture Using a technique that introduces tiny wrinkles into sheets of graphene,
"We've shown that you can make textured environments for cell culture fairly easily using graphene."
graphene, the carbon nanomaterial. To make their textured surfaces, the researchers used graphene oxide dispersed in a solution
Before applying the graphene, tension is applied to the substrate to stretch it out like a rubber band.
When the graphene dries, the tension is released and the substrate snaps back to its normal size.
The size of the wrinkles can be controlled by the concentration of the graphene solution and the extent of the substrate stretching.
"On the flat graphene, the cells were disorganized, multipolar and not aligned,"said Evelyn Kendall Williams, another undergraduate member of the research team."
spindly appearance similar to the look of the cells that grew in the graphene wrinkles.
"This is a new application for graphene, "Hurt said.""We are just beginning to realize all of the innovative ways one can use this atomically thin and flexible building block to make new materials and devices."
#Narrowing the gap between synthetic and natural graphene Media-friendly Nobel laureates peeling layers of graphene from bulk graphite with sticky tape may capture the public imagination,
Synthesis of graphene via chemical vapour deposition (CVD) of methane gas onto a copper substrate is the most common way of producing the quantity
but graphene produced in this way is prone to contamination from chemical agents used to remove the growth substrate.
another approach is to peel away the graphene, and preserve the copper foil for future reuse.
Electrochemical and dry delamination of CVD-grown graphene has previously been demonstrated, but the material still suffers from some processing-related contamination.
Arrayflagship-affiliated physicists from RWTH Aachen University and Forschungszentrum Jülich have together with colleagues in Japan devised a method for peeling graphene flakes from a CVD substrate with the help of intermolecular forces.
Key to the process is the strong Van der waals interaction that exists between graphene and hexagonal boron nitride, another 2d material within
Thanks to strong Van der waals interactions between graphene and boron nitride, CVD graphene can be separated from the copper
and minimises contamination of the graphene due to processing. Raman spectroscopy and transport measurements on the graphene/boron nitride heterostructures reveals high electron mobilities comparable with those observed in similar assemblies based on exfoliated graphene.
Furthermore--and this comes as something of a surprise to the researchers--no noticeable performance changes are detected between devices developed in the first and subsequent growth cycles.
This confirms the copper as a recyclable resource in the graphene fabrication process. Arraywith their dry-transfer process,
Banszerus and his colleagues have shown that the electronic properties of CVD-grown graphene can in principle match those of ultrahigh-mobility exfoliated graphene.
The key is to transfer CVD graphene from its growth substrate in such a way that chemical contamination is avoided The high mobility of pristine graphene is preserved
Prior to their discovery, graphene, which is a single sheet of carbon atoms, was the first two-dimensional material to be touted for its potential energy storage capabilities.
graphene was difficult to modify in form and therefore had limited energy storage capabilities. The new MXENES have surfaces that can store more energy.
#First superconducting graphene created by researchers Graphene, the ultra-thin, ultra-strong material made from a single layer of carbon atoms,
"Decorating monolayer graphene with a layer of lithium atoms enhances the graphene's electron-phonon coupling to the point where superconductivity can be induced,
Graphene, roughly 200 times stronger than steel by weight, is a single layer of carbon atoms arranged in a honeycomb pattern.
sensors and transparent electrodes using graphene.""This is an amazing material, '"says Bart Ludbrook, first author on the PNAS paper and a former Phd researcher in Damascelli's group at UBC."
"Decorating monolayer graphene with a layer of lithium atoms enhances the graphene's electron-phonon coupling to the point where superconductivity can be stabilized."
According to financial reports, the global market for graphene reached $9 million in 2014 with most sales in the semiconductor, electronics, battery, energy,
prepared the Li-decorated graphene in ultra-high vacuum conditions and at ultra-low temperatures (5 K or-449 F or-267 C),
#First superconducting graphene created by researchers Graphene, the ultra-thin, ultra-strong material made from a single layer of carbon atoms,
"Decorating monolayer graphene with a layer of lithium atoms enhances the graphene's electron-phonon coupling to the point where superconductivity can be induced,
Graphene, roughly 200 times stronger than steel by weight, is a single layer of carbon atoms arranged in a honeycomb pattern.
sensors and transparent electrodes using graphene.""This is an amazing material, '"says Bart Ludbrook, first author on the PNAS paper and a former Phd researcher in Damascelli's group at UBC."
"Decorating monolayer graphene with a layer of lithium atoms enhances the graphene's electron-phonon coupling to the point where superconductivity can be stabilized."
According to financial reports, the global market for graphene reached $9 million in 2014 with most sales in the semiconductor, electronics, battery, energy,
prepared the Li-decorated graphene in ultra-high vacuum conditions and at ultra-low temperatures (5 K or-449 F or-267 C),
#A different type of 2-D semiconductor To the growing list of two-dimensional semiconductors, such as graphene, boron nitride,
#Big range of behaviors for tiny graphene pores The surface of a single cell contains hundreds of tiny pores,
Now researchers at MIT have created tiny pores in single sheets of graphene that have an array of preferences and characteristics similar to those of ion channels in living cells.
Each graphene pore is less than 2 nanometers wide, making them among the smallest pores through
Karnik reasoned that graphene would be a suitable material in which to create artificial ion channels:
A sheet of graphene is an ultrathin lattice of carbon atoms that is one atom thick, so pores in graphene are defined at the atomic scale.
To create pores in graphene, the group used chemical vapor deposition, a process typically used to produce thin films.
In graphene, the process naturally creates tiny defects. The researchers used the process to generate nanometer-sized pores in various sheets of graphene,
which bore a resemblance to ultrathin Swiss cheese. The researchers then isolated individual pores by placing each graphene sheet over a layer of silicon nitride that had been punctured by an ion beam
the diameter of which is slightly smaller than the spacing between graphene pores. The group reasoned that any ions flowing through the two-layer setup would have passed likely first through a single graphene pore,
and then through the larger silicon nitride hole. The group measured flows of five different salt ions through several graphene sheet setups by applying a voltage and measuring the current flowing through the pores.
The current-voltage measurements varied widely from pore to pore, and from ion to ion, with some pores remaining stable,
which--given the single-atom thickness of graphene--makes them among the smallest pores through
#New graphene based inks for high-speed manufacturing of printed electronics A low-cost, high-speed method for printing graphene inks using a conventional roll-to-roll printing process,
the method allows graphene and other electrically conducting materials to be added to conventional water-based inks
the first time that graphene has been used for printing on a large-scale commercial printing press at high speed.
Graphene is a two-dimensional sheet of carbon atoms, just one atom thick. Its flexibility, optical transparency and electrical conductivity make it suitable for a wide range of applications,
widespread commercial use of graphene is yet to be realised.""We are pleased to be the first to bring graphene inks close to real-world manufacturing.
"said Dr Tawfique Hasan of the Cambridge Graphene Centre (CGC), who developed the method.""Being able to produce conductive inks that could effortlessly be used for printing at a commercial scale at a very high speed will open up all kinds of different applications for graphene and other similar materials.""
""This method will allow us to put electronic systems into entirely unexpected shapes, "said Chris Jones of Novalia."
"Hasan's method, developed at the University's Nanoscience Centre, works by suspending tiny particles of graphene in a'carrier'solvent mixture,
The same method works for materials other than graphene, including metallic, semiconducting and insulating nanoparticles. Currently, printed conductive patterns use a combination of poorly conducting carbon with other materials, most commonly silver
while graphene and other carbon materials can easily be recycled. The new method uses cheap, nontoxic and environmentally friendly solvents that can be dried quickly at room temperature,
The graphene-based inks have been printed at a rate of more than 100 metres per minute, which is in line with commercial production rates for graphics printing,
Two years ago, Hasan and his colleagues produced a prototype of a transparent and flexible piano using graphene-based inks,
In addition to the new applications the method will open up for graphene, it could also initiate entirely new business opportunities for commercial graphics printers,
More than 200 times more sensitive than commercially available sensors The new sensor, made of graphene
"We started by trying to understand how graphene responds under the magnetic field. We found that a bilayer structure of graphene and boron nitride displays an extremely large response with magnetic fields.
This combination can be utilised for magnetic field sensing applications.""Compared to other existing sensors, which are made commonly of silicon and indium antimonide,
Another breakthrough in this research was the discovery that mobility of the graphene multilayers can be adjusted partially by tuning the voltage across the sensor
Graphene-based magnetoresistance sensors hold immense promise over existing sensors due to their stable performance over temperature variation, eliminating the necessity for expensive wafers or temperature correction circuitry.
Production cost for graphene is also much lower than silicon and indium antimonide. Potential applications for the new sensor include the automotive industry,
or graphene, nanoengineers at the University of California, San diego have invented a new way of fabricating nanostructures that contain well-defined, atomic-sized gaps.
A team of Ph d. students and undergraduate researchers led by UC San diego nanoengineering professor Darren Lipomi demonstrated that the key to generating a smaller nanogap between two nanostructures involves using a graphene spacer,
Graphene is the thinnest material known: it is simply a single layer of carbon atoms and measures approximately 0. 3 nanometers (nm),
which a single layer of graphene is sandwiched between two gold metal sheets. First graphene is grown on a copper substrate,
and then layered on top with a sheet of gold metal. Because graphene sticks better to gold than to copper,
the entire graphene single-layer can be removed easily and remains intact over large areas. Compared to other techniques that are used to produce similar layered structures,
this method allows graphene to be transferred to gold film with minimal defects or contamination. his new method,
which we developed in our lab, is called metal-assisted exfoliation. This is the only way so far in
and is the first author of the study. etal-assisted exfoliation can potentially be useful for industries that use large areas of graphene.
Once the gold/graphene composite is separated from the copper substrate, the newly exposed side of the graphene layer is sandwiched with another gold sheet to produce the gold:
Finally, the structures are treated with oxygen plasma to remove graphene. Scanning electron micrographs of the structures reveal extremely small nanogaps between the gold layers.
Raman spectroscopic measurements of the gold nanostructures reveal that small amounts of graphene still remain between the gold layers after being treated with oxygen plasma.
This means that only the graphene exposed near the surfaces of the gold nanostructures can be removed so far.
Having graphene still in the structures is not desirable for electronic devices which require an entire gap between the structures.
#Scientists find a new way to manufacture graphene nanoribbons for future electronics There is no doubt that graphene is the key to the future of electronics.
However, in order to use graphene in high-performance semiconductor electronics ultra-narrow strips of graphene are needed and scientists have struggled to create them.
and so there would be less of a barrier to integrating these really excellent materials into electronics in the futurewhere graphene could be in the future,
However, to use graphene in such applications is not easy and that is why nanoribbons are needed.
Such nanoribbons can be manufactured by cutting larger sheets of graphene into ribbons. But this technique is not perfect as produced ribbons have very rough edges.
they are growing graphene in this shape via process called chemical vapour deposition. Although described as a rather simple method,
Graphene is only one atom thick material, which conducts electricity and heat with such efficiency that it is likely to revolutionize electronics.
and form graphene on surface of the germanium wafer. Team of researchers made this discovery
when they were exploring dramatically slowing the growth rate of the graphene crystals by decreasing the amount of methane in the chemical vapour deposition chamber.
Scientists found that at a very slow growth rate graphene naturally grows into long nanoribbons on a specific crystal facet of germanium
these strips of graphene have very smooth, armchair edges and can be very narrow and very long, all of
graphene grows at completely random spots on the germanium wafer. Furthermore, strips are oriented in two different directions on the surface.
So now scientists will try to find a way to control the place where graphene starts growing
They produced the crystals in a solution using a substrate made of graphene, a nanomaterial consisting of graphite that is extremely thin measuring the thickness of a single atom.
vertically aligned crystals for a variety of organic semiconductors using the same graphene substrate. he key was deciphering the interactions between organic semiconductors and graphene in various solvent environments,
Kaner said the researchers also discovered another advantage of the graphene substrate. his technique enables us to pattern crystals wherever we want,
#New graphene based inks for high-speed manufacturing of printed electronics A low-cost, high-speed method for printing graphene inks using a conventional roll-to-roll printing process,
the method allows graphene and other electrically conducting materials to be added to conventional water-based inks
the first time that graphene has been used for printing on a large-scale commercial printing press at high speed.
Graphene is a two-dimensional sheet of carbon atoms, just one atom thick. Its flexibility, optical transparency and electrical conductivity make it suitable for a wide range of applications,
widespread commercial use of graphene is yet to be realised. e are pleased to be the first to bring graphene inks close to real-world manufacturing.
said Dr Tawfique Hasan of the Cambridge Graphene Centre (CGC), who developed the method. eing able to produce conductive inks that could effortlessly be used for printing at a commercial scale at a very high speed will open up all kinds of different applications for graphene
and other similar materials. his method will allow us to put electronic systems into entirely unexpected shapes,
Hasan method, developed at the University Nanoscience Centre, works by suspending tiny particles of graphene in a arriersolvent mixture,
The same method works for materials other than graphene including metallic, semiconducting and insulating nanoparticles. Currently, printed conductive patterns use a combination of poorly conducting carbon with other materials, most commonly silver,
while graphene and other carbon materials can easily be recycled. The new method uses cheap, nontoxic and environmentally friendly solvents that can be dried quickly at room temperature,
The graphene-based inks have been printed at a rate of more than 100 metres per minute which is in line with commercial production rates for graphics printing,
Two years ago, Hasan and his colleagues produced a prototype of a transparent and flexible piano using graphene-based inks,
In addition to the new applications the method will open up for graphene, it could also initiate entirely new business opportunities for commercial graphics printers,
#Graphene's thermoelectric properties to help cars recover lost thermal energy Charging bateries or running air conditioning could be assisted by energy from fuel normally wasted as heat emissions One of the less well-known properties of graphene could enable the carbonaceous wonder-material to help combustion engine vehicles to make better use of the energy from their fuel by converting waste heat into electricity
to charge the batteries or power onboard systems, according to the University of Manchester. Graphene-doped strontium titanium oxide has the ability to generate electricity from relatively small amounts of heat
according to a team working with a Leicester-based thermal management specialist called European Thermodynamics. Thermoelectric graphene composite, with graphene fragments ringed in the 2 m-scale image Internal combustion engines lose about 70 per cent of the energy from their fuel as heat,
so recovering some of that energy would obviously be beneficial. But materials that exhibit thermoelectric properties the ability to convert heat to electric current tend to work only at higher temperatures than those seen in engines.
Our findings show that by introducing a small amount of graphene to the base material can reduce the thermal operating window to room temperature
Other graphene-related automotive research at Manchester includes using the material in composites for lightweight bodywork
#ew memory materials could boost storage density It comprises a layered structure of tantalum, nanoporous tantalum oxide and multilayer graphene between two platinum electrodes.
Hone and his research group demonstrated in 2008 that graphene a 2d form of carbon is the strongest material.
He and Lei Wang a postdoctoral fellow in Hone's group have been actively exploring the novel properties of 2d materials like graphene
#Charged graphene gives DNA a stage to perform molecular gymnastics When Illinois researchers set out to investigate a method to control how DNA moves through a tiny sequencing device they did not know they were about to witness a display of molecular gymnastics.
Threading a DNA molecule through a tiny hole called a nanopore in a sheet of graphene allows researchers to read the DNA sequence;
We show that to some degree we can control the process by charging the graphene.
The researchers found that a positive charge in the graphene speeds up DNA movement through the nanopore
We were surprised very by the variety of DNA conformations that we can observe at the surface of graphene
By switching the charge in the graphene the researchers can control not only the DNA's motion through the pore
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