Graphene and its applications
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Graphene And The EmergingTechnology of Neural Prostheses | MIT Technology Review

Graphene And The EmergingTechnology of Neural Prostheses | MIT Technology Review | Graphene and its applications | Scoop.it
Neural implants are set to be revolutionised by a new type of graphene transistor with a liquid gate, say bio-engineers
Carlos Garcia Pando's insight:

Despite numerous trials of electronic devices implanted into the human body, most of these devices are based on silicon substrates which are hard, rigid and sharp,qualities that don't sit well with soft tissue.

Consequently, any small movement of these devices can damage nearby tissue and in the worst cases, form scar tissue. What’s more, the hot, wet and salty environment inside the body can damage electronic components, limiting their lifespan. 

What’s needed, of course, is a flexible substrate that is also biocompatible with human tissue.

 

Now Lucas Hess and pals at the Technische Universität München in Germany say they’ve found the ideal material–graphene. Today, they outline their plans for graphene-based neural prostheses and the experiments they’ve already done to test its biocompatibility.

 

These guys have begun to test graphene interfaces with various cells such as retinal ganglion cells, reporting that graphene has excellent biocompatibility.

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The incredible properties of Graphene (Nanomaterial Technology) - Science Documentary

The incredible properties of Graphene (Nanomaterial Technology) - Science Documentary.
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Single-Crystal Graphene Films Grown More Than 100 Times as Fast as Previously Possible

Single-Crystal Graphene Films Grown More Than 100 Times as Fast as Previously Possible | Graphene and its applications | Scoop.it
Ultrafast synthesis of high-quality graphene films combined with roll-to-roll processes ushers in a new era in graphene production
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Thin coating on condensers could make power plants more efficient

Thin coating on condensers could make power plants more efficient | Graphene and its applications | Scoop.it
Graphene layer one atom thick could quadruple rate of condensation heat transfer in generating plants.
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Graphene displays clear prospects for flexible electronics

Graphene displays clear prospects for flexible electronics | Graphene and its applications | Scoop.it

Semi-transparent, flexible electronics are no longer just science-fiction thanks to graphene’s unique properties, University of Manchester researchers have found.

Carlos Garcia Pando's insight:

The LED device was constructed by combining different 2D crystals and emits light from across its whole surface. Being so thin, at only 10-40 atoms thick, these new components can form the basis for the first generation of semi-transparent smart devices.

 

 

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Graphene: Fast, Strong, Cheap, and Impossible to Use | The New Yorker

Graphene: Fast, Strong, Cheap, and Impossible to Use | The New Yorker | Graphene and its applications | Scoop.it
A new material may transform computers, cell phones, and cancer treatments—if we can just figure out how to use it. John Colapinto reports.
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Hemp fibres 'better than graphene'

Hemp fibres 'better than graphene' | Graphene and its applications | Scoop.it
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They "cooked" cannabis bark into carbon nanosheets and built supercapacitors "on a par with or better than graphene" - the industry gold standard.


Interesting application, no doubt

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Graphene-Based Nano-Antennas May Enable Networks of Tiny Machines

Graphene-Based Nano-Antennas May Enable Networks of Tiny Machines | Graphene and its applications | Scoop.it

“We are exploiting the peculiar propagation of electrons in graphene to make a very small antenna that can radiate at much lower frequencies than classical metallic antennas of the same size,”

Carlos Garcia Pando's insight:

Known technically as a surface plasmon polariton (SPP) wave, the effect will allow the nano-antennas to operate at the low end of the terahertz frequency range, between 0.1 and 10 terahertz – instead of at 150 terahertz required by traditional copper antennas at nanoscale sizes. For transmitting, the SPP waves can be created by injecting electrons into the dielectric layer beneath the graphene sheet.

The full paper (free)

http://www.ece.gatech.edu/research/labs/bwn/papers/2013/j17.pdf



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Mexico Technology Graphene production line completed production (300 ton/year)

Mexico Technology Graphene production line completed production (300 ton/year) | Graphene and its applications | Scoop.it

December 20, 2013, Ningbo Mexico Technology Limited (hereinafter referred to as Mexico Technology) kiloton graphene first phase of the production line with an annual output 300 tons of graphene-scale production line was completed commissioning ceremony located (Ningbo) Cidong held in the coastal area of corporate campus. Company investors graphene Beijing Enterprises Group, Chinese Academy of Sciences, Ningbo materials technology partners, local government leaders attended the ceremony and cut the ribbon together for the completion of the production line

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Archer Exploration extracts graphene from Campoona graphite, South Australia - Proactiveinvestors (AU)

Archer Exploration extracts graphene from Campoona graphite, South Australia - Proactiveinvestors (AU) | Graphene and its applications | Scoop.it
Carlos Garcia Pando's insight:

The ability of Campoona graphite to deliver a wide spectrum of graphene and graphene-related products enhances Archer's opportunity to deliver two long term business arms.

Archer aims to produce high grade to ultra-pure fine natural flake graphite; and manufacture high tech, high-value graphene products.

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Graphene is getting into consumer market

Graphene is getting into consumer market | Graphene and its applications | Scoop.it

The editors of Popular Science, the world’s largest science and technology magazine, have named HEAD’s Graphene™ Speed Pro tennis racquet a 2013 recipient of the publication’s "Best of What’s New Award" in the recreation category.

http://www.popsci.com/bown/2013/product/head-youtek-graphene-speed-pro

Carlos Garcia Pando's insight:

The HEAD Graphene™ Speed Pro is constructed with Graphene™, the world’s strongest and lightest material, which enables a redistribution of weight from the racquet shaft to the grip and head. The optimized redistribution of weight in the racquet allows players to generate more kinetic energy when they hit the ball. This means players of every level can generate more power with less effort, thanks to the integration of Graphene™ in the HEAD Graphene™ Speed Pro.

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Dermal Absorption of Nanomaterials

Dermal Absorption of Nanomaterials | Graphene and its applications | Scoop.it

Danish Ministry of the Environment

Environmental protection Agency

 

Part of the ”Better control of nano” initiative 2012-2015
Environmental Project No. 1504, 2013

 

The project “Dermal absorption of nanomaterials” was carried out during the period January to May 2013.  This report and the accompanying database (see appendix 4) are intended to provide a comprehensive evaluation of the knowledge base regarding the dermal absorption/penetration of nanomaterials based on the currently available scientific literature. These results regarding skin as an exposure route for nanomaterials are part of the “Better control of nano” initiative conducted by the Danish EPA with the aim of further clarifying possible risks to consumers and the environment.
The project was carried out by the Institute of Occupational Medicine (IOM) with COWI A/S as
subcontractor.

Carlos Garcia Pando's insight:

Some recommendations about safety while working, using or just consuming products with nanomaterials.

 

Not talking about graphene, but....

 

Chapter 7 CONCLUSIONS:

 

There is a diverse literature base surrounding the issue of dermal penetration/ absorption of nanomaterials. However despite the relative abundance of publications, there is a limitation on the
reporting of physicochemical data and/or the alteration of multiple experimental parameters in a non-systematic way that hampers true comparisons of nanomaterials or their physicochemical
properties and the drawing of robust conclusions. Indeed, similar to this conclusion, it has been noted in a previous review article that “experimental data do not allow clear cut conclusions because
experimental conditions lack consistency”. This is a common issue within nanotoxicology and more recently, in terms of undertaking and reporting of rigorous physicochemical data, there have been significant improvements in this area as journals increasingly consider such characterisation a prerequisite for consideration of publication.

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Graphene nanoribbons help to create a better barrier to gas

Graphene nanoribbons help to create a better barrier to gas | Graphene and its applications | Scoop.it
Researchers have combined graphene nanoribbons with thermoplastic polyurethane to create a material that is more impermeable to pressurised gas, a development that has applications in the automotive sector.
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Full paper: http://dx.doi.org/10.1021/nn404843n

Abstract

A thermoplastic polyurethane (TPU) composite film containing hexadecyl-functionalized low-defect graphene nanoribbons (HD-GNRs) was produced by solution casting. The HD-GNRs were well distributed within the polyurethane matrix, leading to phase separation of the TPU. Nitrogen gas effective diffusivity of TPU was decreased by three orders of magnitude with only 0.5 wt% HD-GNRs. The incorporation of HD-GNRs also improved the mechanical properties of the composite films, as predicted by the phase separation and indicated by tensile tests and dynamic mechanical analyses. The improved properties of the composite film could lead to potential applications in food packaging and light-weight mobile gas storage containers.

 

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Manufacturing graphene from Aromatic Monolayers.

Manufacturing graphene from Aromatic Monolayers. | Graphene and its applications | Scoop.it

Self-assembled monolayers of aromatic molecules on copper substrates can be converted into high-quality single-layer graphene using low-energy electron irradiation and subsequent annealing. This two-dimensional solid state transformation is characterized on the atomic scale and the physical and chemical properties of the formed graphene sheets are studied by complementary microscopic and spectroscopic techniques and by electrical transport measurements. As substrates, Cu(111) single crystals and the technologically relevant polycrystalline copper foils are successfully used.

Carlos Garcia Pando's insight:

Additional advantages result from the versatility of the method of self-organized coating. It can be performed with different aromatic molecules which could, for example, also contain doping atoms for electronic doping of the final product. Applied in multiple layers, so-called bi-layer or multi-layer graphene could be manufactured, whose changed electronic band structure expands the potential applications of single-layer graphene. Likewise, other substrates than the copper used here (for example other metals, semiconductors, isolators) can be used. In addition, it should also be possible to manufacture graphene on any three-dimensional surfaces, as molecular self-organization also takes place on curved surfaces. The new manufacturing method broadens the perspectives for an improved use of the "magic material" in such an impressive way that the respective publication was emphasized on the cover sheet of the August issue of the scientific journal "Advanced Materials".

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Graphene Silly Putty detects pitter-patter of spider footsteps

Graphene Silly Putty detects pitter-patter of spider footsteps | Graphene and its applications | Scoop.it
Sensor made of graphene and Silly Putty can detect pulse, breathing — and spider feet.

 

Despite its widespread use in nanocomposites, the effect of embedding graphene in highly viscoelastic polymer matrices is not well understood. Scientists now added graphene to a lightly cross-linked polysilicone, often encountered as Silly Putty, changing its electromechanical properties substantially. The resulting nanocomposites display unusual electromechanical behavior, such as postdeformation temporal relaxation of electrical resistance and nonmonotonic changes in resistivity with strain. These phenomena are associated with the mobility of the nanosheets in the low-viscosity polymer matrix. By considering both the connectivity and mobility of the nanosheets, the scientists developed a quantitative model that completely describes the electromechanical properties. These nanocomposites are sensitive electromechanical sensors with gauge factors >500 that can measure pulse, blood pressure, and even the impact associated with the footsteps of a small spider.


Via Dr. Stefan Gruenwald
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University of Glasgow researchers make graphene production breakthrough

University of Glasgow researchers make graphene production breakthrough | Graphene and its applications | Scoop.it
Researchers at the University of Glasgow have now found a way to produce large sheets of graphene using the same cheap type of copper used to manufacture lithium-ion batteries found in many household devices.
Carlos Garcia Pando's insight:

“The commercially-available copper we used in our process retails for around one dollar per square metre, compared to around $115 for a similar amount of the copper currently used in graphene production. This more expensive form of copper often required preparation before it can be used, adding further to the cost of the process.

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Another tiny miracle: Graphene oxide soaks up radioactive waste

Another tiny miracle: Graphene oxide soaks up radioactive waste | Graphene and its applications | Scoop.it
Graphene oxide far surpasses other materials commonly used to remove radioactive toxins from water, according to new research at Rice University and Lomonosov Moscow State University.
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Twisted graphene chills out when lit with a laser

Twisted graphene chills out when lit with a laser | Graphene and its applications | Scoop.it

When two sheets of graphene are stacked in a special way, it is possible to cool down the graphene with a laser instead of heating it up, University of Manchester researchers have shown.

Carlos Garcia Pando's insight:

Amazing things come out of the nano-world, challenging our most accepted and intuitive laws of physics:

“In any material, heat is stored in the vibrations of atoms; in a hot material, atoms are vibrating faster than in a colder material. When a laser of a specific energy (colour) is shone on this twisted graphene, the particles of light in the laser (called photons) will absorb the vibration energy of the atoms, thereby cooling the system down.”

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Length-dependent thermal conductivity in suspended single-layer graphene

Length-dependent thermal conductivity in suspended single-layer graphene | Graphene and its applications | Scoop.it
Carlos Garcia Pando's insight:

Here we report experimental measurements and non-equilibrium molecular dynamics simulations of thermal conduction in suspended single-layer graphene as a function of both temperature and sample length. Interestingly and in contrast to bulk materials, at 300 K, thermal conductivity keeps increasing and remains logarithmically divergent with sample length even for sample lengths much larger than the average phonon mean free path. This result is a consequence of the two-dimensional nature of phonons in graphene, and provides fundamental understanding of thermal transport in two-dimensional materials.

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Mimicking Developmental Chondrogenesis to Generate Chondrocytes In-Vitro

Mimicking Developmental Chondrogenesis to Generate Chondrocytes In-Vitro | Graphene and its applications | Scoop.it
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 In a new open-access paper published in Stem Cell Reports, the authors explored the developmental cues governing articular cartilage geneartion in-vivo

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Graphene faces its stiffest challenge yet - in condoms

Graphene faces its stiffest challenge yet - in condoms | Graphene and its applications | Scoop.it
Graphene faces its stiffest challenge yet - in condoms
Carlos Garcia Pando's insight:

“Since its isolation in 2004, people have wondered when graphene will be used in our daily life. Currently, people imagine using graphene in mobile-phone screens, food packaging, chemical sensors, etc.
“If this project is successful, we might have a use for graphene which will literally touch our every-day life in the most intimate way.”

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The Global Market for Graphene 2013: Forecasts from 2010 to 2020

The Global Market for Graphene 2013: Forecasts from 2010 to 2020 | Graphene and its applications | Scoop.it
Presented in magazine format this fully updated to August 2013 report provides and easily readable and succinct guide to this wonder material Driven by demand...
Carlos Garcia Pando's insight:

The European Union is funding a 10 year 1,000 million euro coordination action on graphene. South Korea is spending $350 million plus on commercialization initiatives and the United Kingdom is investing over £70 million on various initiatives. Applications are coming onto the market for polymer composites and EMI shielding coatings. Graphene-based conducting inks are also finding their way into smart cards and radio-frequency identification tags.


TechNavio's analysts forecast the Global Graphene market to grow at a CAGR of 60.4 percent over the period 2012-2016. 

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Strategies for engineering controls in NANOMATERIAL production and handling processes

Carlos Garcia Pando's insight:

Another initiative into health safety in the workplace, related to the use and handling of nanomaterials.

 

The focus of this document is to identify and describe strategies for the engineering control of worker exposure during the production or use of engineered nanomaterials. Nanomaterials may have properties different from those of larger particles of the same material, making them unique and desirable for specific product applications. The consumer products market currently has more than 1,000 nanomaterial-containing products including makeup, sunscreen, food storage products, appliances, clothing, electronics, computers, sporting goods, and coatings. As more nanomaterials are introduced into the workplace and nano-enabled products enter the market, it is essential that producers and users of engineered nanomaterials ensure a safe and healthy work environment.

 

Engineered nanomaterials are materials that are intentionally produced and have at least one primary dimension less than 100 nanometers (nm). 

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Consortium of GRAPHENE Flagship will be expanded with another 20 – 30 groups through the open call

Consortium of GRAPHENE Flagship will be expanded with another 20 – 30 groups through the open call | Graphene and its applications | Scoop.it
Carlos Garcia Pando's insight:

he Consortium of Graphene Flagship will be extended with another 20-30 groups through an open call to be issued in November 2013. This open call is intended to further strengthen the engineering aspects of the flagship.

The total volume of the call is over 9 M€ EC funding, which will have to be spent during the CP-CSA period, i.e. before March 31, 2016. The call is divided into 12 scientific and technological (S&T) topics:

Materials,

Health & environment,

Fundamental science,

High-frequency electronics,

Optoelectronics,

Spintronics,

Sensors,

Flexible electronics,

Energy applications,

Nanocomposites,

Production

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Unexpected finding: Water makes nanoribbon development easy

Unexpected finding: Water makes nanoribbon development easy | Graphene and its applications | Scoop.it
A tiny meniscus of water makes it practical to form long graphene nanoribbons less than 10 nanometers wide.
Carlos Garcia Pando's insight:

Full paper: http://pubs.acs.org/doi/abs/10.1021/nn403057t

 

Tour said water’s tendency to adhere to surfaces is often annoying, but in this case it’s essential to the process. “There are big machines that are used in electronics research that are often heated to hundreds of degrees under ultrahigh vacuum to drive off all the water that adheres to the inside surfaces,” he said. “Otherwise there’s always going to be a layer of water. In our experiments, water accumulates at the edge of the structure and protects the graphene from the reactive ion etching (RIE). So in our case, that residual water is the key to success.

“Nobody’s ever thought of this before, and it’s nothing we thought of,” Tour said. “This was fortuitous.”

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