Among nanomaterials, carbon-based nanoparticles such as carbon nanotubes and graphene have shown promising results, but they suffer from relatively low electrical conductivity,
The two components that make the UCLA-developed system work are a polymer donor and a nanoscale fullerene acceptor.
The polymer donor absorbs sunlight and passes electrons to the fullerene acceptor; the process generates electrical energy.
The plastic materials, called organic photovoltaics, are organized typically like a plate of cooked pasta a disorganized mass of long, skinny polymer paghettiwith random fullerene eatballs.
Some fullerene meatballs are designed to sit inside the spaghetti bundles, but others are forced to stay on the outside.
The fullerenes inside the structure take electrons from the polymers and toss them to the outside fullerene
revealing that nanomaterials and UV light can rapchemicals for easy removal from soil and water.
If left alone, these nanomaterials would remain suspended and dispersed evenly in water. But when exposed to UV light,
as another example of a persistent pollutant that could potentially be remediated using these nanomaterials. nd for analytical applications where you don need as much volume to purify or concentrate,
Last year teams from China and the United states demonstrated a fiber-like supercapacitor made from both graphene
or viscosell of which have been tested electrochemically by Drexel team at the A j. Drexel Nanomaterials Institute, and knitted at the Shima Seiki Haute Tech Lab. The NFW process includes several steps
#Graphene Heating system Dramatically Reduces Home energy Costs Breakthroughs in energy generation using nanomaterialsike their enabling of better supercapacitors
But it is unheralded in the area of energy savings that nanomaterials are perhaps making the biggest inroads.
the company estimates that this graphene-based heating system can reduce energy costs by anywhere from 25 to 70 percent.
Xefro uses graphene-based ink that can be printed on a variety of materials and into just about any configuration.
The system takes advantage of graphene's minimal thermal mass so the heat can be turned on and off quickly,
and leverages graphene large surface area so that energy isn wasted in heating up the heater itself. he innovation is all about getting useable heat where it is needed,
explained Tim Harper, a founder of Xefro and co-inventor of the graphene heating element,
and systems before we finally arrived at graphene. o meet the company third criteria, that the material should be usable in a wide variety of shapes and sizes,
Harper and his collaborators turned to graphene inks. his is especially important for water heating, where we wrap the flexible graphene element around a hot water tank,
says Harper. y varying the ink formulation, we can change the resistivity of the heating element
and its thickness depending on the required application. nce Xefro made the decision to use graphene,
and ensure that most of the heat is emitted out into the room rather than simply heating up the wall behind the heater. hile graphene does offer some attractive properties for reducing wasted energy,
it is the combination of the graphene-based heating element with an electronic control system that provides the real cost savings. ecause graphene gives us an instant on/off response,
#Graphene coating Could Save Millions in Power plant Energy costs Earlier this week, we covered a company, Xefro,
that was applying graphene to a home heating system, producing energy savings over traditional systems. Now research out of MIT is showing that coating power plant condensers with graphene could make them more energy efficient.
In research published in the journal Nano Letters, the MIT team addressed one of the basic elements of steam-generated electricity:
and found that by layering their surfaces with graphene they can improve the rate of heat transfer by a factor of four.
The researchers believe that this graphene surface could improve condenser heat transfer so that an overall power plant efficiency could be improved by as much as 2 to 3 percent based on figures from the Electric power Research Institute."
The condensers gain efficiency because the the graphene resists the formation of films on the condensers.
The MIT researchers exploited the graphene coating hydrophobic qualities to ensure that the water formed into droplets.
the researcher found that the graphene coating offered a fourfold improvement in heat transfer compared to bare metal.
Most importantly, the graphene coating showed no sign of measurable degradation over the two-week period of the test.
since production of the graphene coating is based on standard chemical vapor deposition, a product based on this could be available within a year i
#Graphene Shines in World's Thinnest Light bulb Back in April, we covered news that graphene was going to make a commercial breakout of sorts as a coating in an LED light bulb to reduce its energy consumption
using graphene as the filament. e've created what is essentially the world's thinnest light bulb,
and graphene-based on-chip optical communications. n work published in the journal Nature Nanotechnology researchers suspended graphene above a silicon substrate by attaching it to two metal electrodes
and then passed current through the graphene-based filament, causing it to heat up. In the video below you can see an animated depiction of how the graphene filament operate.
The aim of creating integrated circuits that use photons rather than electrons sometimes called integrated photonic circuits,
But graphene makes all the difference. The international team demonstrated heating the graphene-based filament to 2500 Degree celsius,
so that it would glow brightly enough to be seen by the naked eye. The material success in this application depended on two of its properties:
Graphene unusual heat conduction was key to keeping the light emitter from destroying the chip it was built on.
The lack of conduction confines the heat within a small ot spotin the center of the graphene filament.
Graphene transparency was behind the discovery that emitted spectrum of light emitted had peaks at certain wavelengths.
occurred because of interference between the light emitted from the graphene filament and the light reflecting off the silicon substrate beneath it.
Novel materials for touch screens that use flexible nanomaterials could also help. One patent application suggests Apple is already looking at this issue.
Using nanocellulose broken down from tree fibres, the researchers produced an elastic, foam-like battery material that can withstand shock and stress."
The nanocellulose is dissolved, frozen and then freeze-dried so that the moisture evaporates without passing through a liquid state.
Using nanocellulose broken down from tree fibres, the researchers produced an elastic, foam-like battery material that can withstand shock and stress."
The nanocellulose is dissolved, frozen and then freeze-dried so that the moisture evaporates without passing through a liquid state.
#Scientists use graphene to create the world's smallest light bulb Scientists have created the world's smallest light bulb from a one atom-thick layer of graphene,
The ultrathin graphene was turned into a superheated filament-just like the thin wire of an incandescent light bulb
and graphene-based on-chip optical communications,"Professor Hone said.""We are just starting to dream about other uses for these structures,
Graphene, which was discovered by two Russian emigre scientists working at the University of Manchester, is composed of layers of carbon laid down in a lattice structure just one atom thick.
The Columbia scientists, working with researchers in South korea, attached small strips of graphene to microscopic metal electrodes which passed an electric current through the suspended strips causing them to heat up and bright
"The visible light from atomically thin graphene is so intense that it is visible even to the naked eye,
The researchers also found that it was possible to vary the wavelengths of the light by altering the distance of the graphene wafers suspended over the silicon substrate of the chip-a potentially useful way of tuning the light source
because graphene is transparent, unlike any conventional filament, and allows us to tune the emission spectrum by changing the distance to the substrate,
Graphene's Potential Drinking water Graphene could be used to desalinate seawater to make it drinkable-tiny pores in its crystal lattice could let water molecules through while blocking salt.
graphene could be perfect for the new generation of touchscreens. Rust-free cars Graphene repels water
and is highly conductive. This combination delays the oxidising reaction that causes rust. Scientists have created the world's smallest light bulb from a one atom-thick layer of graphene
the miracle material that promises to transform everything from smartphones and computers to cars, buildings and satellites.
The ultrathin graphene was turned into a superheated filament-just like the thin wire of an incandescent light bulb
and graphene-based on-chip optical communications,"Professor Hone said.""We are just starting to dream about other uses for these structures,
Graphene, which was discovered by two Russian emigre scientists working at the University of Manchester, is composed of layers of carbon laid down in a lattice structure just one atom thick.
The Columbia scientists, working with researchers in South korea, attached small strips of graphene to microscopic metal electrodes which passed an electric current through the suspended strips causing them to heat up and bright
"The visible light from atomically thin graphene is so intense that it is visible even to the naked eye,
The researchers also found that it was possible to vary the wavelengths of the light by altering the distance of the graphene wafers suspended over the silicon substrate of the chip-a potentially useful way of tuning the light source
because graphene is transparent, unlike any conventional filament, and allows us to tune the emission spectrum by changing the distance to the substrate,
Graphene's Potential Drinking water Graphene could be used to desalinate seawater to make it drinkable-tiny pores in its crystal lattice could let water molecules through while blocking salt.
graphene could be perfect for the new generation of touchscreens. Rust-free cars Graphene repels water
and is highly conductive. This combination delays the oxidising reaction that causes rust t
#Microsoft's drones to catch mosquitoes and help stop epidemics WASHINGTON: Microsoft researchers are developing autonomous drones that collect mosquitoes to look for early signs that potentially harmful viruses are spreading,
#World thinnest bulb created from graphene Researchers have created the world's thinnest light bulb using graphene, an atomically thin and perfectly crystalline form of carbon,
and Korea Research Institute of Standards and Science said that they have demonstrated for the first time an on-chip visible light source using graphene as a filament.
They attached small strips of graphene to metal electrodes, suspended the strips above the substrate,
and graphene-based on-chip optical communications,"said Hone
#In a first, drug offers hope for children with dwarfism An experimental drug, vying to become the first approved treatment for dwarfism, improved growth in children by a significant amount in a preliminary study, the drug's developer,
low-cost graphene that could pave the way for the creation of the firondonst flexible`electronic skin,
Researchers from UK's University of Exeter through the new method can develop graphene now in simpler way.
"Currently, industrial graphene is produced using Chemical Vapour Deposition (CVD), which is pretty expensive and time consuming process,
The new technique grows graphene in an industrial cold wall CVD system, a state-of-the-art piece of equipment recently developed by UK graphene company Moorfield.
This new technique grows graphene 100 times faster than conventional methods, reduces costs by 99
%and has enhanced electronic quality, researchers said d
#UK plans world's first artificial blood transfusions by 2017 LONDON: The world's first human trial of artificial blood grown in a lab from stem cells is set to take place in the UK by 2017.
Using their nanocellulose-based hydrogel, they reported proliferation and collagen type after just 21 days of culturing.
#A new ink formulation allows you to 3d print objects out of stretchy graphene A few months ago,
who have made a great breakthrough in the possibilities of 3d printing graphene structures. This material, as you might now,
Wee already learned that the team from Northwestern University have developed a solution-based 3d printable graphene ink that can be used to make objects multiple centimeters in length.
the team led by Ramille Shah has unveiled just a lot more about the potential and limitations of their graphene ink,
which amazingly consists of 60 percent graphene (in terms of volume), making up 75 percent of its weight.
To explain, graphene is essentially a form of carbon, just like diamonds or the lead in pencils.
graphene is a 2d material that consists of a hexagonal sheet only a single atom thick.
And while some graphene successes have been achieved previously, this specific ink contains more graphene than any previously developed 3d printable materials (the previous record was around the 20 percent).
This means that the electrical and mechanical properties of graphene can soon be taken into use.
What's more, the rest of the ink consists of a biocompatible biodegradable polyester (PLG) that,
thus really onto something. eople have tried to print graphene before. But it been a mostly polymer composite with graphene making up less than 20 percent of the volume
Shah explains on her university website. This means these materials don copy graphene properties and remain to brittle and fragile to use.
And while you might think that a 60-70 percent graphene content isn the real deal either,
this does in fact copy all the properties you need, while the remaining materials ensure flexibility and robustness. t a liquid ink,
entitled hree-dimensional printing of high-content graphene scaffolds for electronic and biomedical applications. 3d printed graphene appeared on the cover.
As a test, her team populated a graphene scaffold with stem cells, with the results being excellent.
The secret to this graphene ink is that the graphene is embedded into microscopic flakes. This makes the ink highly viscous,
but extrusion realigns all the flakes to create a single filament with all the characteristics of graphene.
the elasticity of the material can be tuned by changing the portions of graphene and polymers.
but that increases when the amount of graphene is decreased (though eventually this means losing some graphene properties).
throwing graphene into that mix really changes the playing field t
#Researchers create revolutionary optical fiber 3d printing technique for telecom and datacom industries As we continue to see more developments being made towards advancing additive manufacturing technologies,
such as fullerenes or nanotubes, provided they are biocompatible and nontoxic. Previous studies have revealed that gold and platinum nanoparticles produce a large number of electrons via the plasmon excitation mechanism.
In this study, the authors analysed the spectra of secondary electrons emitted from a carbon nanoparticle composed of fullerite,
a crystalline form of C60 fullerene, irradiated by an ion beam consisting of fast protons. They quantified the electron yield in a broad kinetic energy range,
who headed the project at the Lab's Center for Functional Nanomaterials (CFN), a DOE Office of Science User Facility.
The images thus obtained showed that the new method used to direct the placement of nanoparticles on DNA-encoded vertices of molecular frames can prove to be effective for designing new nanomaterials.
and for the stability of these nanomaterials in solution. állego had worked in DNA NANOTECHNOLOGY before coming to Georgia Tech,
#Graphene-Coated Catheters May Improve Delivery of Chemotherapy drugs The research suggests that placing graphene-an extremely thin sheet of carbon atoms-on the internal surfaces of intravenous catheters commonly used to deliver chemotherapy drugs into a patient's body will improve the efficacy of treatments,
"As a solution to this problem, the international team of researchers have proposed using graphene as an alternative coating material for catheters.
as well as the drug's reactions with silver and graphene. XPS is used a technique to measure the surface chemistry of a particular material by firing a beam of x-rays at it
When the researchers repeated this experiment with 5-Fu and graphene, they found that these reactions completely disappeared
and that graphene caused no damage to the drug. Graphene is a biocompatible material with low toxicity that has already been suggested as an external coating for biomedical applications.
The researchers state that the fabrication of thin graphene coatings is technological feasible and can even be grown on top of silver to maintain compliance with existing fabrication methods."
"Our findings are an important first step in this new field. Together with our collaborators and students, we are increasing our understanding of the critical interactions between drugs and medical coatings,
#Canatu Announces Design Win for Carbon nanobud Material-Based Flexible Touch Films Canatu, a manufacturer of next-generation transparent conductive films and touch sensors, has announced today a design win for a first-to-market fully flexible product.
Both these products incorporate its proprietary flexible Carbon nanobud material. Earlier this year Canatu launched its super-thin 23 um CNB#Flex Film
The zero haze, zero reflectance properties of Canatu Carbon nanobud material also provide for unparalleled outdoor readability,
#Inexpensive 3d Polypyrrole Aerogel-Based Alternative Material for Costly Graphene aerogels But now, materials such as graphene aerogels are gaining traction as more desirable alternatives
but graphene aerogels are prohibitively expensive and difficult to produce for large-scale applications because of the complicated purification
So a team of researchers in China set out to design a cheaper material with properties similar to a graphene aerogeln terms of its conductivity, as well as a lightweight
and some nanomaterials are only a few atoms in size. The method described in the Scientific Reports article tructural color printing based on plasmonic metasurfaces of perfect light absorptioninvolves the use of thin sandwiches of nanometer scale metal-dielectric materials known as metamaterials that interact with light
#Graphene Used for World's Thinnest Light bulb This clip shows the emission of light from graphene,
The graphene vibrates during light emission due to the flexural mode of graphene at high temperature. The team, led by Young Duck Kim, a postdoctoral researcher at Columbia Engineering,
attached small graphene strips to metal electrodes and suspended the strips over a substrate. When a current was passed through the filaments, they heated up."
and graphene-based on-chip optical communications,"said Hone, Wang Fon-Jen Professor of Mechanical engineering at Columbia Engineering and co-author of the study.
The team showed that the graphene reached temperatured over 2500#C by measuring the spectrum of emitted light.
This temperature was sufficient for the graphene to glow brightly.""The visible light from atomically thin graphene is so intense that it is visible even to the naked eye,
without any additional magnification,"explained Young Duck Kim, first and co-lead author on the paper.
The team identified that the peaks were due to interference between the light that was emitted directly from the graphene,
and was passed back to the graphene. Kim stated,"This is only possible because graphene is transparent, unlike any conventional filament,
and allows us to tune the emission spectrum by changing the distance to the substrate.""Graphene's ability to reach such high temperatures without melting the metal electrodes
or the substrate is due an interesting characteristic: graphene's conductivity decreases as it heats up.
This means that the high temperatures are restricted to a small'hot spot'in the center.""At the highest temperatures, the electron temperature is much higher than that of acoustic vibrational modes of the graphene lattice,
so that less energy is needed to attain temperatures needed for visible light emission. These unique thermal properties allow us to heat the suspended graphene up to half of temperature of the sun,
and improve efficiency 1000 times, as compared to graphene on a solid substrate, "explained Myung-Ho Bae,
a senior researcher at KRISS and co-lead author. By creating large-scale of arrays of chemical-vapor-deposited (CVD) graphene light emitters,
the team demonstrated that this new technique was scalable. Yun Daniel Park co-lead author and professor in the department of physics and astronomy at Seoul National University said,
but using it in its pure form-graphene -and at its ultimate size limit-one atom thick."
titled'Bright visible light emission from graphene',was published in the Advance Online Publication (AOP) on Nature Nanotechnology's website.
and then used with various other inorganic nanomaterials. In an unmixable two-phase solution composed of an organic solvent (chloroform) and water,
The system expands upon Bruker exclusive Peakforce Tapping technology to provide new information for graphene research
#New Technique Uses Ultrasound Waves for Bulk Synthesis of Graphene A team of researchers from the University of Tabriz have developed a method to manufacture graphene, a crystalline allotrope of carbon, in a simple and economical manner.
The project manager for the research, Dr. Hamed Asgharzadeh stated that they have discovered solutions to existing issues related to the synthesis of graphene.
and production costs but also enable graphene to be produced in large quantities. Graphene is one of the strongest, lightest and thinnest conductive materials known to man.
In graphene a single layer of carbon atoms is arranged in the form of a honeycomb structure.
Its highly versatile nature makes it applicable for use in numerous electronics gadgets such as wearables, flexible displays and other sophisticated electronic devices."
and regeneration are the two basic methods for producing graphene, and the biggest hindrance of such methods is the difficulty of washing the graphene oxide due to its high hydrophilic property.
This in turn necessitates the use of high-tech facilities such as high-speed centrifuges with hefty costs and limited capacities."
"Also, the graphene oxide will regenerate before the washing process and in the presence of oxidizers
#Grolltex to Commercialize Graphene Mass Production Technology with The Triton Fund Investment A University of California,
San diego graduate student has found a way to use mass-produced graphene, an allotrope of carbon that is one atom-thick.
Large-scale graphene can be used for applications such as water desalination membranes and flexible electronics. raphene is more conductive than any metal we know of,
said UC San diego Nanoengineering Ph d. candidate Aliaksandr (Alex) Zaretski. t has been known for years that graphene is useful as a water desalination membrane.
We can introduce nanopores into a monolayer of graphene, push large quantities of salt water through and the salt will be rejected on the basis of size
according to Zaretski, is that no one has been able to produce graphene on a large-enough scale for this
The company has developed an environmentally benign process to grow graphene with the same properties as traditional manufacturing.
Grolltex is an early stage company with breakthrough technology for the mass production of graphene.
which graphene is grown on a copper substrate and overlaid with a sheet of nickel. Because graphene adheres better to nickel than to copper,
the entire graphene single-layer can be removed easily and remains intact over large areas. About The Triton Fund:
The Triton Fund (TTF) is owned a wholly subsidiary of Vertical Venture Partners (VVP. TTF invests in companies commercializing technologies being developed at UC San diego (UCSD) or by UCSD alumni.
and Princeton universities have played also a role in the development of this innovative technique, called D Structure Identification of Nanoparticles by Graphene Liquid Cell EM (SINGLE),
A graphene liquid cell is the first component, which is a one-molecule-thick bag capable of holding liquid within it during exposure to the ultra high vacuum of the electron microscope column.
#Simpler Thermodynamic Approach Could Help Improve the Performance of Graphene-Based Nanoelectronic Devices The researchers found that the energy of ultrafast electrical currents passing through graphene is converted very efficiently into electron heat,
making graphene electrons behave just like a hot gas. he heat is distributed evenly over all electrons.
entitled hermodynamic picture of ultrafast charge transport in graphene has recently been published in Nature Communications.
Graphene a single sheet of carbon atoms is known to be a very good electrical conductor. As a result
graphene finds a multitude of applications in modern nanoelectronics. They range from highly efficient detectors for optical
pushing their response times to be as short as a picosecond. he results of this study will help improve the performance of graphene-based nanoelectronic devices such as ultra-high speed transistors and photodetectorssays Professor Dmitry Turchinovich,
who led the research at the MPI-P. In particular they show the way for breaking the terahertz operation speed barrier i e. one thousand billions of oscillations per second for graphene transistors.
If left alone, these nanomaterials would remain suspended and dispersed evenly in water. But when exposed to UV light,
as another example of a persistent pollutant that could potentially be remediated using these nanomaterials. nd for analytical applications where you don need as much volume to purify or concentrate,
#New Revolutionary One-step, High-Yield Graphene Generation Process Ben-Gurion University of the Negev (BGU) and University of Western australia researchers have developed a new process to develop few-layer
graphene for use in energy storage and other material applications that is faster, potentially scalable and surmounts some of the current graphene production limitations.
Graphene is a thin atomic layer of graphite (used in pencils) with numerous properties that could be valuable in a variety of applications,
including medicine, electronics and energy. Discovered only 11 years ago, graphene is one of the strongest materials in the world,
highly conductive, flexible, and transparent. However, current methods for production currently require toxic chemicals and lengthy and cumbersome processes that result in low yield that is not scalable for commercial applications.
and has succeeded in synthesizing few-layer (4-5) graphene in higher yields. It involves a novel optical system (originally invented by BGU Profs.
which few-layer (and eventually single-layer graphene can be synthesized. Source: http://aabgu. org o
Overtext Web Module V3.0 Alpha
Copyright Semantic-Knowledge, 1994-2011