All Blog Posts Tagged 'graphene' (85)

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Graphene-based speaker developed in Korea

Researchers from Seoul's National University developed a transparent and lightweight speaker made from Graphene. This may enable speakers embedded in windows or displays. It may be especially suited to develop noise-cancelling devices.



The researchers say that Graphene speakers will be cheaper and very power efficient compared to other types of speakers. There is still a lot of work to be done, and the research group is currently developing an improved bass response.…





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Added by TINC on July 8, 2011 at 5:07pm — No Comments

Graphene based quantum dots may lead to cheap and efficient solar cells and OLED displays

Scientists from the National Physical Laboratory in New Delhi, India developed graphene based quantum dots (GQDs) blended with organic polymers that can be used in new photovoltaics (solar) cells. This may solve the problem of toxic metals (cadmium and lead) used in today's quantum dots, and the new material is also more stable then current organic materials.



The GQDs are 9-nm in size have similar electronic properties to normal QDs, and actually perform better (less current loss and… Continue

Added by TINC on July 6, 2011 at 7:20pm — 2 Comments

Graphene-based product sales to reach $67 million in 2015, $675 million in 2020

Electronics.ca published a new market research report in which they forecast that graphene-based product sales will reach $67 million in 2015 and $675 million in 2020. The compound annual growth rate (CAGR) between 2015 and 2020 will be 58.7%.

Here's how they see the market share of different graphene applications:

* Capacitors: growing from $26 million in 2015 to $340 in 2020

* Structured materials: $17.5 million in 2015 and $91 million in 2020.

* The display market:… Continue

Added by TINC on June 15, 2011 at 6:52pm — No Comments

Graphene: the route from touch screens to digital nanoelectronics

Dear All,

we have uploaded to our homepage

    http://www.nanotechnology.hu

L. P. Biro's talk given at the EuroNanoForum 2011 Budapest conference, entitled

Graphene: the route from touch screens to digital nanoelectronics

Added by TINC on June 2, 2011 at 9:11pm — No Comments

Defects in Graphene can make it even stronger

NIST researchers say that defects in Graphene may appear due to the movement of the carbon atoms at high temperatures when producing graphene by heating silicon carbide under ultrahigh vacuum. Graphene tend to rearrange from six-sided rings to five or seven atoms. Stringing five and seven member rings together in closed loops creates a new type of defect or grain boundary loop in the honeycomb lattice.



These defects might allow it a little flexibility, making Graphene even more… Continue

Added by TINC on May 25, 2011 at 8:15pm — No Comments

Russian researchers have studied elastic properties of graphene

As of today, graphene, the thinnest one-atom-thick layer of carbon, is one of the most amazing materials. Measurements made in 2008 by researchers at Columbia University, proved that graphene was also the strongest and most elastic material among all known ones. However, the obtained data related to “ideal” graphene, which contains very few admixtures, its crystal structure being homogeneous. Apparently, defects in its structure should…

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Added by Natalia Nanorf.ru on May 16, 2011 at 5:43am — 1 Comment

Graphene to lead the way to faster optical networks

Researchers from the University of California, Berkeley built an optical modulator (switches light on and off) using Graphene. This is the basis of network modulators (which use light to transmit data). The graphene based modulator is the world's smallest and fastest - which could help create faster communication devices. In fact Graphene can be used to create modulators that are up to ten times faster than any current technology based modulators.…







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Added by TINC on May 9, 2011 at 8:15pm — No Comments

Graphene paper - a new strong and flexible material

Researhcers from the University of Technology in Sydney, Australia, developed a new material called Graphene paper (GP), made from Graphite which is lighter, stronger, harder and more flexible than steel. It's also eco-friendly and recyclable. The new material is thinner than paper and ten times stronger than steel. The researchers say that the new material can be used in the automotive and aviation industries - to create lighter planes and cars which will be require less fuel, and yet be even… Continue

Added by TINC on April 24, 2011 at 6:13pm — 1 Comment

IBM researchers develop a 155 Ghz graphene transistor using a diamond-like carbon substrate

Researchers from IBM developed a graphene transistor with a record cut-off frequency of 155 Ghz and the shortest gate length ever (just 40nm). They used a diamond-like carbon as the top layer of the substrate on which the Graphene is deposited. This material is a great substrate for Graphene. It's a& non-polar dielectric material - so it does not 'trap' or scatter charges, doesn't absorb a lot of wayer and has excellent thermal conductivity. It's also cheap to make and widely used today in… Continue

Added by TINC on April 8, 2011 at 8:55pm — No Comments

Graphene transistors are 'self cooling'

Researchers from the University of Illinois discovered that graphene transistors have a nanoscale cooling effect that reduces their temperature. This means that graphene-based electronics could require very little cooling (or none at all):

http://www.graphene-info.com/graphene-transistors-are-self-cooling

Added by TINC on April 4, 2011 at 9:52pm — No Comments

Technology Insight Report: Graphene

 …

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Added by Robin Luniya on March 31, 2011 at 7:30pm — No Comments

High-performance bendable batteries possible using Graphene

Researchers from the Korea Advanced Institute of Science and Technology (KAIST) say that Graphene can be used to create bendable rechargeable batteries.



This battery actually has promising performance compared to non-flexible batteries - higher energy density, power density and better cycle life. The team now works on extending the performance using solid-state or polymer electrolyte. They also believe that this technology can be used not just in batteries but also in solar cells,… Continue

Added by TINC on March 16, 2011 at 9:25pm — No Comments

Harvard's Graphene-based DNA sequencing tech to be commercialized

Oxford Nanopore has reached an agreement with Harvard University to develop technology that uses graphene for DNA and RNA sequencing. This technology was developed in Harvard laboratories and Oxford Nanopore now has exclusive rights to develop and commercialize it. This is great news and hopefully will bring this technology to market soon:…



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Added by TINC on March 15, 2011 at 11:38pm — No Comments

New discovery paves the way towards Graphene based nonvolatile memory

Researchers from the A*STAR Institute of Materials Research and Engineering and the National University of Singapore have developed an improved design for a Graphene based field-effect transistor (FET). The new device includes an additional silicon dioxide (SiO2) dielectric gate below the graphene layer. This allows for simplified bit writing by providing an additional background source of charge carriers and paves the way towards nonvolatile Graphene-based memory…



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Added by TINC on February 18, 2011 at 11:09pm — No Comments

Graphene and ITO can be combined to make cheaper and more durable fuel cells

Researchers from the US DOE's Pacific Northwest National Laboratory (PNNL) and Princeton University found a way to combine Graphene and indium tin oxide (ITO) nanoparticles to create cheaper and more durable fuel cells:

http://www.graphene-info.com/graphene-and-ito-can-be-combined-make-cheaper-and-more-durable-fuel-cells

Added by TINC on February 13, 2011 at 9:57pm — No Comments

Graphene can be made to repel water effectively - with great potential

Researchers from Vanderbilt University (Nashville, Tennessee) have developed a way to create a film of Graphene Oxide so it either causes water to bead up and 'run off' or alternatively be spread out in a thin layer. As graphene sheets are transparent, you can put this on your car's windshield and the water will shed so quickly that you won't need wipers. Or you can use it to make ships glide through water very efficiently. Or use it to make water repellent clothes or self cleaning… Continue

Added by TINC on February 2, 2011 at 8:30pm — No Comments

New graphene-based material for li-ion batteries promises increased cycle life and faster recharges

Vorbeck Materials and Targray Technology is introducing Vor-Charge: a Graphene-based Composite Anode Material for Li-ion battery cells. The companies say that Vor-Charge can significantly increase batteries cycle life and enable faster recharge rates:

http://www.graphene-info.com/vorbeck-and-targray-introduces-new-graphene-based-li-ion-materials

Added by TINC on January 24, 2011 at 9:10pm — No Comments

Raman scattering at pure graphene zigzag edges

Theory has predicted rich and very distinct physics for graphene nanodevices with boundaries that follow either the armchair or the zigzag crystallographic directions. We have demonstrated that hexagonal

holes obtained by anisotropic etching of graphene are bounded

predominantly by zigzag edges which do not contribute to the D peak in

Raman spectroscopy.

 …

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Added by TINC on December 24, 2010 at 9:16am — No Comments

AthenaWeb: Graphene for the baffled

In October the Nobel Prize for Physics was awarded to two researchers from Manchester University for their work on Graphene. But if, like much of the world, you’re left wondering just what graphene is, and why it deserves a Nobel Prize, then help is at hand.

NanoTP” has produced two short videos explaining graphene and its amazing properties. The videos are written and…
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Added by TINC on December 20, 2010 at 7:53am — No Comments

New Graphene-based supercapacitor can store as much energy as a NiMH battery

Researchers from Nanotek Instruments have developed a new graphene-based supercapacitor that can store as much energy as NiMH batteries, but charge and discharge in minutes or

even seconds. The new device has a specific energy density of

85.6 Wh/kg at room temperature and 136 Wh/kg at 80 °C. These are the

highest ever values for "electric double layer" supercapacitors based on

carbon nanomaterials.…



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Added by TINC on November 28, 2010 at 8:56am — 1 Comment

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