#Chemists devise technology that could transform solar energy storage The materials in most of today's residential rooftop solar panels can store energy from the sun for only a few microseconds at a time.
A new technology developed by chemists at UCLA is capable of storing solar energy for up to several weeks-an advance that could change the way scientists think about designing solar cells.
The new design is inspired by the way that plants generate energy through photosynthesis. iology does a very good job of creating energy from sunlight
To capture energy from sunlight, conventional rooftop solar cells use silicon, a fairly expensive material. There is currently a big push to make lower-cost solar cells using plastics
though, the UCLA research has proven that inexpensive photovoltaic materials can be organized in a way that greatly improves their ability to retain energy from sunlight
#Chemists devise technology that could transform solar energy storage The materials in most of today's residential rooftop solar panels can store energy from the sun for only a few microseconds at a time.
A new technology developed by chemists at UCLA is capable of storing solar energy for up to several weeks-an advance that could change the way scientists think about designing solar cells.
The new design is inspired by the way that plants generate energy through photosynthesis. iology does a very good job of creating energy from sunlight
To capture energy from sunlight, conventional rooftop solar cells use silicon, a fairly expensive material. There is currently a big push to make lower-cost solar cells using plastics
though, the UCLA research has proven that inexpensive photovoltaic materials can be organized in a way that greatly improves their ability to retain energy from sunlight
The demand for a silicon material aided the discovery of graphene, a single layer of graphite
and storing solar energy into hydrogen. Storing solar energy as hydrogen is a promising way for developing comprehensive renewable energy systems.
To accomplish this, traditional solar panels can be used to generate an electrical current that splits water molecules into oxygen and hydrogen,
However, harvesting usable amounts of solar energy requires large areas of solar panels, and it is notoriously difficult and expensive to fabricate thin films of 2-D materials at such a scale
called ungsten diselenide Past studies have shown that this material has a great efficiency for converting solar energy directly into hydrogen fuel
"Our understanding of optics on the macroscale has led to holograms, Google glass and LEDS, just to name a few technologies.
#Graphene-based film can be used for efficient cooling of electronics Researchers have developed a method for efficiently cooling electronics using graphene-based film.
Moreover, the graphene film is attachable to electronic components made of silicon, which favours the film's performance compared to typical graphene characteristics shown in previous, similar experiments.
Electronic systems available today accumulate a great deal of heat, mostly due to the ever-increasing demand on functionality.
professor at Chalmers University of Technology, were the first to show that graphene can have a cooling effect on silicon-based electronics.
That was the starting point for researchers conducting research on the cooling of silicon-based electronics using graphene. ut the methods that have been in place so far have presented the researchers with problems Johan Liu says. t has become evident that those methods cannot be used to rid electronic devices
When you try to add more layers of graphene, another problem arises, a problem with adhesiveness.
the graphene no longer will adhere to the surface, since the adhesion is held together only by weak Van der waals bonds."
"e have solved now this problem by managing to create strong covalent bonds between the graphene film and the surface,
The stronger bonds result from so-called functionalisation of the graphene, i e. the addition of a property-altering molecule.
it creates so-called silane bonds between the graphene and the electronic component (see picture). Moreover, functionalisation using silane coupling doubles the thermal conductivity of the graphene.
The researchers have shown that the in-plane thermal conductivity of the graphene-based film, with 20 micrometer thickness, can reach a thermal conductivity value of 1600 W/mk,
which is four times that of copper. ncreased thermal capacity could lead to several new applications for graphene,
says Johan Liu.""One example is the integration of graphene-based film into microelectronic devices and systems,
such as highly Efficient light Emitting Diodes (LEDS), lasers and radio frequency components for cooling purposes. Graphene-based film could also pave the way for faster, smaller, more energy efficient, sustainable high power electronics."
"Image: Graphene-based film on an electronic component with high heat intensity. Credit: Johan Liu Source:
http://www. mynewsdesk. com/uk/chalmers/..
#Environmentally friendly lignin nanoparticle'greens'silver nanobullet to battle bacteria Researchers have developed an effective and environmentally benign method to combat bacteria by engineering nanoscale particles that add the antimicrobial potency of silver to a core of lignin,
crowdsourcing approach to neuroscience is a great way to understand normal and healthy brain circuitry."
Solar energy could be made cheaper if less land had to be purchased to accommodate solar panels, best achieved if each solar cell could be coaxed to generate more power.
Riverside that has found an ingenious way to make solar energy conversion more efficient. The researchers report in Nano Letters that by combining inorganic semiconductor nanocrystals with organic molecules, they have succeeded in pconvertingphotons in the visible and near-infrared regions of the solar spectrum. he infrared region of the solar
the organics get light out. esides solar energy, the ability to upconvert two low energy photons into one high energy photon has potential applications in biological imaging, data storage and organic light-emitting diodes.
Bardeen emphasized that the research could have wide-ranging implications. he ability to move light energy from one wavelength to another, more useful region, for example,
Solar energy could be made cheaper if less land had to be purchased to accommodate solar panels, best achieved if each solar cell could be coaxed to generate more power.
Riverside that has found an ingenious way to make solar energy conversion more efficient. The researchers report in Nano Letters that by combining inorganic semiconductor nanocrystals with organic molecules, they have succeeded in pconvertingphotons in the visible and near-infrared regions of the solar spectrum. he infrared region of the solar
the organics get light out. esides solar energy, the ability to upconvert two low energy photons into one high energy photon has potential applications in biological imaging, data storage and organic light-emitting diodes.
Bardeen emphasized that the research could have wide-ranging implications. he ability to move light energy from one wavelength to another, more useful region, for example,
When scientists develop a full quantum computer, the world of computing will undergo a revolution of sophistication,
But, before that happens, quantum physicists like the ones in UC Santa barbara's physics professor John Martinis'lab will have to create circuitry that takes advantage of the marvelous computing prowess promised by the quantum bit("qubit),
preserving the qubits'state (s) and imbuing the system with the highly sought-after reliability that will prove foundational for the building of large-scale superconducting quantum computers.
It turns out keeping qubits error-free, or stable enough to reproduce the same result time and time again,
is one of the major hurdles scientists on the forefront of quantum computing face.""One of the biggest challenges in quantum computing is that qubits are said inherently faulty
Julian Kelly, graduate student researcher and co-lead author of a research paper that was published in the journal Nature."
"So if you store some information in them, they'll forget it.""Unlike classical computing, in which the computer bits exist on one of two binary("yes/no,
"or"true/false")positions, qubits can exist at any and all positions simultaneously, in various dimensions.
"that gives quantum computers their phenomenal computational power, but it is also this characteristic which makes qubits prone to"flipping,"especially when in unstable environments,
and thus difficult to work with.""It's hard to process information if it disappears,
which several qubits work together to preserve the information, said Kelly. To do this, information is stored across several qubits."
"And the idea is that we build this system of nine qubits, which can then look for errors,
"he said. Qubits in the grid are responsible for safeguarding the information contained in their neighbors,
he explained, in a repetitive error detection and correction system that can protect the appropriate information
and store it longer than any individual qubit can.""This is the first time a quantum device has been built that is capable of correcting its own errors,
For the kind of complex calculations the researchers envision for an actual quantum computer, something up to a hundred million qubits would be needed,
but before that a robust self-check and error prevention system is necessary. Key to this quantum error detection
the actual original information that is being preserved in the qubits remains unobserved. Why? Because quantum physics.""You can't measure a quantum state,
The very act of measurement locks the qubit into a single state and it then loses its superpositioning power,
Therefore, in something akin to a Sudoku puzzle, the parity values of data qubits in a qubit array are taken by adjacent measurement qubits,
which essentially assess the information in the data qubits by measuring around them.""So you pull out just enough information to detect errors,
This development represents a meeting of the best in the science behind the physical and the theoretical in quantum computing--the latest in qubit stabilization and advances in the algorithms behind the logic of quantum computing."
Improve Lives of Millions March 5th, 2015anousheh Ansari Wins the National Space Society's Space Pioneer Award for"Service to the Space Community"March 5th, 2015enhanced Graphene Components for Next
2015important step towards quantum computing: Metals at atomic scale March 2nd, 2015waterloo invention advances quantum computing research: New device,
which will be used in labs around the world to develop quantum technologies, produces fragile entangled photons in a more efficient way February 16th,
2015quantum research past, present and future for discussion at AAAS February 16th, 2015discoveries Enhanced Graphene Components for Next Generation Racing yacht March 5th, 2015american Chemical Society Presidential Symposia:
Improve Lives of Millions March 5th, 2015anousheh Ansari Wins the National Space Society's Space Pioneer Award for"Service to the Space Community"March 5th, 2015enhanced Graphene Components for Next
drive new product development and inspire new applications like the Internet of things for existing technologies. The R&d conducted at IRT Nanoelec provides early insight into how emerging technologies such as 3d integration
Professor Cronin's research spans a broad range of topics including electrical and spectroscopic characterization of carbon nanotubes, graphene,
and other novel lower dimensional materials. 2d materials such as graphene and few-layer transition metal dichalcogenides (TMDCS) have been attracting a lot of research interest in recent years
While graphene has many advantages it is suited not to the field of optoelectronics where TMDCS such as molybdenum disulphide (Mos2) have a clear advantage thanks to exhibiting a finite band gap in the visible wavelength range.
#Caltech scientists develop cool process to make better graphene Abstract: A new technique invented at Caltech to produce graphene--a material made up of an atom-thick layer of carbon--at room temperature could help pave the way for commercially feasible graphene-based solar cells and light-emitting diodes, large-panel displays, and flexible electronics."
"With this new technique, we can grow large sheets of electronic-grade graphene in much less time
and at much lower temperatures,"says Caltech staff scientist David Boyd, who developed the method.
and the novel properties of the graphene it produces. Graphene could revolutionize a variety of engineering and scientific fields due to its unique properties,
which include a tensile strength 200 times stronger than steel and an electrical mobility that is two to three orders of magnitude better than silicon.
or 1, 000 degrees Celsius--for incorporating graphene fabrication with current electronic manufacturing. Additionally, high-temperature growth of graphene tends to induce large, uncontrollably distributed strain--deformation--in the material,
which severely compromises its intrinsic properties.""Previously, people were only able to grow a few square millimeters of high-mobility graphene at a time,
and it required very high temperatures, long periods of time, and many steps,"says Caltech physics professor Nai-Chang Yeh, the Fletcher Jones Foundation Co-Director of the Kavli Nanoscience Institute and the corresponding author of the new study."
"Our new method can consistently produce high-mobility and nearly strain-free graphene in a single step in just a few minutes without high temperature.
at that time a Caltech professor of mechanical engineering and applied physics, was trying to reproduce a graphene-manufacturing process he had read about in a scientific journal.
In this process, heated copper is used to catalyze graphene growth.""I was playing around with it on my lunch hour,
which provides the carbon atoms needed for graphene growth. When later Boyd examined the copper plate using Raman spectroscopy,
a technique used for detecting and identifying graphene, he saw evidence that a graphene layer had formed indeed."
"It was an'A-ha!''moment,"Boyd says.""I realized then that the trick to growth is to have a very clean surface, one without the copper oxide."
but that it simultaneously produced graphene as well. At first, Boyd could not figure out why the technique was so successful.
"The valves were letting in just the right amount of methane for graphene to grow,
The ability to produce graphene without the need for active heating not only reduces manufacturing costs,
and nine to ten different steps to make a batch of high-mobility graphene using high-temperature growth methods,
"Work by Yeh's group and international collaborators later revealed that graphene made using the new technique is of higher quality than graphene made using conventional methods:
and it has the highest electrical mobility yet measured for synthetic graphene. The team thinks one reason their technique is so efficient is that a chemical reaction between the hydrogen plasma
which to grow graphene. The scientists also discovered that their graphene grows in a special way.
Graphene produced using conventional thermal processes grows from a random patchwork of depositions. But graphene growth with the plasma technique is more orderly.
The graphene deposits form lines that then grow into a seamless sheet, which contributes to its mechanical and electrical integrity.
A scaled-up version of their plasma technique could open the door for new kinds of electronics manufacturing,
Yeh says. For example, graphene sheets with low concentrations of defects could be used to protect materials against degradation from exposure to the environment.
Another possibility would be to grow large sheets of graphene that can be used as a transparent conducting electrode for solar cells and display panels."
"In the future, you could have based graphene cellphone displays that generate their own power, "Yeh says. Another possibility, she says,
is to introduce intentionally imperfections into graphene's lattice structure to create specific mechanical and electronic attributes."
"If you can strain graphene by design at the nanoscale, you can artificially engineer its properties.
But for this to work, you need to start with a perfectly smooth, strain-free sheet of graphene,
"Yeh says.""You can't do this if you have a sheet of graphene that has uncontrollable defects in different places."#
"##Along with Yeh and Boyd, additional authors on the paper,"Single-Step Deposition Of high-Mobility Graphene at Reduced Temperatures,"include Caltech graduate students Wei Hsiang Lin, Chen Chih
Hsu and Chien-Chang Chen; Caltech staff scientist Marcus Teague; Yuan-Yen Lo, Tsung-Chih Cheng,
New cheap and efficient electrode for splitting water March 18th, 2015graphene Graphene'gateway'discovery opens possibilities for improved energy technologies March 18th,
2015imperfect graphene opens door to better fuel cells: Membrane could lead to fast-charging batteries for transportation March 18th,
2015display technology/LEDS/SS Lighting/OLEDS Engineers create chameleon-like artificial'skin'that shifts color on demand March 12th, 2015breakthrough in OLED technology March 2nd,
New cheap and efficient electrode for splitting water March 18th, 2015energy Graphene'gateway'discovery opens possibilities for improved energy technologies March 18th, 2015clean energy future:
New cheap and efficient electrode for splitting water March 18th, 2015imperfect graphene opens door to better fuel cells:
and reduce damage on biomolecules and two-dimensional nanomaterials, such as graphene March 18th, 2015graphene'gateway'discovery opens possibilities for improved energy technologies March 18th,
2015drexel Univ. materials research could unlock potential of lithium-sulfur batteries March 17th, 2015symmetry matters in graphene growth:
New cheap and efficient electrode for splitting water March 18th, 2015a new method for making perovskite solar cells March 16th, 2015uc research partnership explores how to best harness solar power March 2nd,
Rice university scientists gain control of electronic, fluorescent properties of coal-based graphene Abstract: Graphene quantum dots made from coal,
introduced in 2013 by the Rice university lab of chemist James Tour, can be engineered for specific semiconducting properties in either of two single-step processes.
In a new study this week in the American Chemical Society journal Applied materials & Interfaces, Tour and colleagues demonstrated fine control over the graphene oxide dots'size-dependent band gap,
Tour said graphene quantum dots may prove highly efficient in applications ranging from medical imaging to additions to fabrics and upholstery for brighter and longer-lasting colors."
Graphene quantum dots are photoluminescent, which means they emit light of a particular wavelength in response to incoming light of a different wavelength.
and reduce damage on biomolecules and two-dimensional nanomaterials, such as graphene March 18th, 2015news and information 30 years after C60:
A long strived-for silicon dodecahedron synthesised at room temperature March 18th, 2015symmetry matters in graphene growth: Rice researchers find subtle interactions with substrate may lead to better control March 16th,
Rice researchers'theory combines strength, stiffness and toughness of composites into a single design map March 16th, 2015symmetry matters in graphene growth:
Highly connected structures don't always support fastest quantum computing March 17th, 2015new technology may double radio frequency data capacity:
2015engineers create chameleon-like artificial'skin'that shifts color on demand March 12th, 2015the Universitat Politcnica de Valncia is coordinating a European project to develop a device for the quick and early diagnosis of cancer March 7th,
Controlling particles with light and microfibers March 18th, 2015imperfect graphene opens door to better fuel cells: Membrane could lead to fast-charging batteries for transportation March 18th, 2015news and information 30 years after C60:
Rice university scientists gain control of electronic, fluorescent properties of coal-based graphene March 18th, 2015graphene'gateway'discovery opens possibilities for improved energy technologies March 18th,
Nanotechnology shows promise for more accurate prostate cancer screening and prognosis March 17th, 2015'Additive manufacturing'could greatly improve diabetes management March 17th, 2015nanotechnology Drug Delivery Market in the US 2012-2016:
New cheap and efficient electrode for splitting water March 18th, 2015imperfect graphene opens door to better fuel cells:
New cheap and efficient electrode for splitting water March 18th, 2015imperfect graphene opens door to better fuel cells:
New cheap and efficient electrode for splitting water March 18th, 2015imperfect graphene opens door to better fuel cells:
and reduce damage on biomolecules and two-dimensional nanomaterials, such as graphene March 18th, 2015rice fine-tunes quantum dots from coal:
Rice university scientists gain control of electronic, fluorescent properties of coal-based graphene March 18th, 2015nano piano's lullaby could mean storage breakthrough March 16th, 2015nanoelectronics Quantum computing:
1 step closer with defect-free logic gate-Developing a new approach to quantum computing, based on braided quasiparticles as a logic gate to speed up computing,
first requires understanding the potential error-inducing factors March 19th, 2015iranian Scientists Apply Nanotechnology to Produce Electrical insulator March 7th,
2015ultra-thin nanowires can trap electron'twisters'that disrupt superconductors February 24th, 2015discoveries Quantum computing: 1 step closer with defect-free logic gate-Developing a new approach to quantum computing, based on braided quasiparticles as a logic gate to speed up computing,
first requires understanding the potential error-inducing factors March 19th, 2015click! That's how modern chemistry bonds nanoparticles to a substrate March 19th, 2015new optical materials break digital connectivity barriers:
News and information'Additive manufacturing'could greatly improve diabetes management March 17th, 2015harris & Harris Group Reports Financial statements as of December 31, 2014 and Posts Annual Letter to Shareholders on Website March 17th, 2015four
2015nanomedicine'Additive manufacturing'could greatly improve diabetes management March 17th, 2015nanotechnology Drug Delivery Market in the US 2012-2016:
2015discoveries Stable long term operation of graphene devices achieved (Kopie 1 march 17th, 2015maps predict strength of structures:
2015announcements'Additive manufacturing'could greatly improve diabetes management March 17th, 2015harris & Harris Group Reports Financial statements as of December 31, 2014 and Posts Annual Letter to Shareholders on Website March 17th,
2015stable long term operation of graphene devices achieved (Kopie 1 march 17th, 2015four Scientists With Major Contributions to Research at Brookhaven Lab Named American Physical Society Fellows March 17th, 201
"In the era of Big data, the current frequency spectrum crisis is one of the biggest challenges researchers are grappling with
#Engineers create chameleon-like artificial'skin'that shifts color on demand Abstract: Borrowing a trick from nature,
Few studies explore toxicity of cellulose nanocrystals March 10th, 2015thin films Graphene meets heat waves March 9th, 2015ciqus researchers obtain high-quality perovskites over large areas by a chemical method March 4th,
2015uc research partnership explores how to best harness solar power March 2nd, 2015automotive/Transportation Glass coating improves battery performance:
researchers added glass cage-like coating and graphene oxide March 2nd, 2015researchers turn unzipped nanotubes into possible alternative for platinum:
or graphene based supercapacitors for attaching redox active material on the current collector. Without the mass of binding materials, the hybrid electrode is a good candidate to make lightweight supercapacitors."
Moreover, significant improvement was attained in the rate of data processing in comparison with the previous studies.
Silicon photonics could significantly increase the power and speed of machines such as supercomputers, data center servers and the specialized computers that direct autonomous cars and drones with collision detection.
Data centers that require faster connections between computers also could implement the technology soon, he says s
#Printing 3-D graphene structures for tissue engineering: A new ink formulation allows for the 3-D printing of graphene structures Abstract:
Ever since single-layer graphene burst onto the science scene in 2004, the possibilities for the promising material have seemed nearly endless.
With its high electrical conductivity, ability to store energy, and ultra-strong and lightweight structure, graphene has potential for many applications in electronics, energy, the environment,
and even medicine. Now a team of Northwestern University researchers has found a way to print three-dimensional structures with graphene nanoflakes.
The fast and efficient method could open up new opportunities for using graphene printed scaffolds regenerative engineering and other electronic or medical applications.
Led by Ramille Shah assistant professor of materials science and engineering at Northwestern's Mccormick School of engineering and of surgery in the Feinberg School of medicine,
and her postdoctoral fellow Adam Jakus, the team developed a novel graphene-based ink that can be used to print large, robust 3-D structures."
"People have tried to print graphene before, "Shah said.""But it's been a mostly polymer composite with graphene making up less than 20 percent of the volume."
"With a volume so meager, those inks are unable to maintain many of graphene's celebrated properties.
But adding higher volumes of graphene flakes to the mix in these ink systems typically results in printed structures too brittle and fragile to manipulate.
Shah's ink is the best of both worlds. At 60-70 percent graphene, it preserves the material's unique properties,
including its electrical conductivity. And it's flexible and robust enough to print robust macroscopic structures.
the graphene flakes are mixed with a biocompatible elastomer and quickly evaporating solvents.""It's a liquid ink,
"Supported by a Google Gift and a Mccormick Research Catalyst Award, the research is described in the paper"Three-dimensional printing of high-content graphene scaffolds for electronic and biomedical applications,"published in the April
An expert in biomaterials, Shah said 3-D printed graphene scaffolds could play a role in tissue engineering and regenerative medicine as well as in electronic devices.
"The printed graphene structure is also flexible and strong enough to be sutured easily to existing tissues,
and graphene's electrical conductivity most likely contributed to the scaffold's biological success."Cells conduct electricity inherently--especially neurons,
"The graphene-based ink directly follows work that Shah and her graduate student Alexandra Rutz completed earlier in the year to develop more cell-compatible, water-based, printable gels.
The company has created a graphene-based product for the remediation of water contaminated by oil and hydrocarbons Abstract:
Directa Plus at 18th European Forum on Eco-innovation to present GENIUS, the innovative project that leads to the creation of a graphene-based product able to remove hydrocarbons from polluted water
project success stories, this afternoon from 2. 30 pm to 4. 30 pm, Directa Plus will present GENIUS, Graphene.
The creation of this graphene-based oil-adsorbent product, commercialized as Grafysorber, has been promoted by GENIUS project
which develops processes for the production of a new generation of graphene-based nanomaterials targeting existing global markets.
The headquarter is in Lomazzo (near Como), inside the Science and Technological Park of Comonext, where in June 2014 Directa Plus opened Le Officine del Grafene Graphene Factory, the largest European
pristine graphene nanoplatelets industrial production unit, based on a patented and approved technology. For more information, please click herecontacts:
Graphene Taking control of light emission: Researchers find a way of tuning light waves by pairing 2 exotic 2-D materials May 20th, 2015news and information SUNY Poly CNSE and NIOSH Launch Federal
May 20th, 2015toward'green'paper-thin, flexible electronics May 20th, 2015globalfoundries Offers New Low-power 28nm Solution for High-performance Mobile and Iot Applications:
May 20th, 2015toward'green'paper-thin, flexible electronics May 20th, 2015globalfoundries Offers New Low-power 28nm Solution for High-performance Mobile and Iot Applications:
2015events/Classes Nanometrics Announces Live webcast of Upcoming Investor and Analyst Day May 20th, 2015globalfoundries Offers New Low-power 28nm Solution for High-performance Mobile and Iot Applications:
May 19th, 2015nnco and Museum of Science fiction to Collaborate on Nanotechnology and 3d printing Panels at Awesome Con May 19th, 201 0
Uncovering the real history of art using a graphene scanner Museum curators, art restorers, archaeologists and the broader public will soon be able to learn much more about paintings and other historic objects,
thanks to an EU project which has become a pioneer in noninvasive art exploration techniques, based on a graphene scanner.
Uncovering the real history of art using a graphene scanner Luxembourg Posted on May 21st,2015 Researchers working on INSIDDE,
have developed a graphene scanner that can explore under the surface of a painting, or through the dirt covering an ancient object unearthed in an archaeological dig,
Until graphene, considered to be one of the materials of the future came along it was difficult to generate terahertz frequencies to acquire such detail.
Graphene in this application acts as a frequency multiplier, allowing scientists to reveal previously hidden features such as brushstroke textures, pigments and defects,
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