The device, called Netra, is a plastic, binocular-like headset. Users attach a smartphone, with the startup app, to the front and peer through the headset at the phone display.
In new research, published in the Royal Society of Chemistry's Journal of Materials Chemistry A, they found that some metal-organic frameworks,
as porphyrin is related to chlorophylls, the green pigments which allow plants to convert sunlight into chemical energy,
#Researchers Use Potatoes to Make Eco-friendly Plastic films Using potato peels and culls considered waste by Alberta potato-processing industry,
With applications for both the food packaging and cosmetic industries, the new bioactive film is a green alternative to traditional petroleum-based plastics
or repelled by, a metal surface by changing the polarity of the voltage applied to the metal.
in turn, allows control over the rate of heat transfer between the metal and the liquid.
Peter Nilsson, a chemical biologist at Linköping University in Sweden, was experimenting with conductive plastics,
than regular, crystalline solids. But the new type of glass created by researchers at the University of Chicago
Like a crystal, it has a well-defined molecular organization, de Pablo said in a statement.
including a small polymer panel that literally goes"poof,"changing from a solid into a gas.
The team demonstrated their tractor beam using tiny balls of polystyrene the same material used in packing peanuts.
"The team currently levitates lightweight polystyrene balls that measure up to 0. 2 inches (5 millimeters) across.
The nanoparticles are made of biodegradable polymers called poly (ß-amino esters)( PBAES) and in lab tests were able to pass through mucus taken from real patients.
The Velox valve works with different size mitral annuli and consists of the standard pericardial leaflets on top of a polymer coated nitinol self-expanding structure.
#This company grows super-metals like trees A Seattle start-up called Modumetal could soon do for metal
what 3-D printing has done for plastics, reports Fortune. The company has developed a revolutionary process for"growing"metal that can be likened to how trees grow, according to CEO and cofounder Christina Lomasney.
The method is the ideal way of making materials, she explained. It's similar to the way that other Nature has evolved growing things over eons."
"The key to the method and what makes it so innovative is the use of nanotechnology to micromanage at the tiniest of scales the construction of their metal alloys, layer by layer.
"plywood-like metals with custom-made properties that are superior to conventional materials due to their nano-level detail.
Corrosion resistance isn't the only super-trait of these metals. They can also be made stronger and lighter than steel,
and resistant to temperature changes too. For example, the Defense department has approached the company with interest in the development of new armor that is both bulletproof and light enough to wear.
and using metals like smelting, the Modumetal method requires only electricity. The company hopes its technique will usher in a new era
Ballantine's added a Rose gold mouthpiece to retain what it describes as"that evocative, cold touch on your lip as you drink."
#New ultra-strong, lightweight aluminum-steel alloy invented that rivals titanium Old-fashioned steel has been one of the most reliable and ubiquitous building materials for centuries,
so it might seem a bit outmoded to talk of a steel breakthrough. But researchers at Pohang University of Science and Technology in South korea may have made steel cool again, not to mention stronger and lighter, reports Popular Mechanics.
The researchers have devised a method for creating an aluminum-steel alloy that is more flexible, lightweight and stronger than any kind of steel ever made before.
This isn't the first time anyone has thought to add aluminum to the steel mix. Back in the 1970's
Soviet scientists recognized that by blending steel and aluminum they could forge an ultra-strong, lightweight metal,
but these advantages were always superseded by one major drawback: it was incredibly brittle. When significant force was applied,
it always broke rather than bent. The problem was that when you fuse aluminum and iron atoms together,
it tends to create tough, crystalline structures called B2, which are what make the aluminum-steel alloys so brittle.
No one had ever found a way around this problem, until now. Hansoo Kim and his team at Pohang discovered that
if the B2 crystals could be dispersed properly throughout the steel, the surrounding alloy could insulate them from splintering."
"My original idea was that if I could somehow induce the formation of these B2 crystals,
I might be able to disperse them in the steel, "explained Kim. It's not as simple as it sounds.
Kim and his team spent years painstakingly heat-treating and thinly rolling their steel in repeated attempts to control
when and where B2 crystals were formed. They experimented by adding bits to the mix; nickel, it turns out,
offered the particularly important advantage of making the crystals form at a much higher temperature, for instance.
Finally, they mastered their technique. The result of all this work is a viable aluminum-steel alloy that is 13 percent less dense compared to normal steel,
and with a comparable strength-to-weight ratio compared to titanium alloys. That's significant,
and it could make aluminum-steel alloy the building material of the future.""Because of its lightness, our steel may find many applications in automotive
and aircraft manufacturing,"said Kim m
#How to save soldiers'lives with fizz One of the biggest challenges for medics on the battlefield is treating blood loss,
which is among the leading causes of death for wounded soldiers. Bandages infused with chemicals designed to assist blood clotting helps,
and the University of North carolina at Chapel hill have designed a novel drug release technology that relies on a stretchable elastomer
The patches consist of an elastomer that has tiny capsules throughout its surface each filled with drug loaded nanoparticles.
This pressure comes from stretching of the elastomer film, which in turn stretches the capsules and compresses them to release the drugs.
But in gas sensing applications, copper oxide was much less widely investigated compared to other metal oxide materials.
But in gas sensing applications, copper oxide was much less widely investigated compared to other metal oxide materials.
and electrically active crystals in one direction unlocks exotic spintronic switching activityby breaking the symmetry of ultiferroiccrystals using a special compression cell,
where polarization effects are initiated at ultralow temperatures by changing the crystal internal symmetry. This effect,
By applying pressure to the crystal in a direction that corresponds to a specific crystallographic axis,
The team constructed a unique cell that clamps a multiferroic barium cobalt germanium oxide (Ba2coge2o7) crystal between a pair of zirconium oxide pistons (Fig. 1). They then investigated how the sample electric polarization changed under uniaxial stress.
In contrast, by deforming the Ba2coge2o7 crystal with varying levels of uniaxial stress, the researchers could tune the polarization output in unprecedented ways, from fully on to fully off,
particularly for crystals with high levels of symmetry. any multiferroic materials have the potential to show stress-induced effects,
Lithium metal, for example, can store about 10 times as much energy per gram, but is extremely dangerous,
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
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.
when it explored dramatically slowing the growth rate of the graphene crystals by decreasing the amount of methane in the chemical vapor deposition chamber.
the graphene crystals naturally grow into long nanoribbons on a specific crystal facet of germanium. By simply controlling the growth rate and growth time,
It is stronger than steel yet many times lighter more conductive than copper and more flexible than rubber.
and mechanical properties of MOFS compared to materials such as ceramics or metals, and have resulted in the past in structural collapse during postprocessing techniques such as sintering
raditional methods used in melt-casting of metals or sintering of ceramics cause the structural collapse of MOFS due to the structures thermally degrading at low temperatures.
Through exploring the interface between melting, recrystallisation and thermal decomposition, we now should be able to manufacture a variety of shapes
The formation of glasses that contain highly interchangeable metal and organic components, in is highly unusual,
as they are normally either purely organic, for example in solar cell conducting polymers, or entirely inorganic, such as oxide or metallic glasses.
whereby different metals or organics are swapped into, or out of, the MOFS before melting o
or polymer layers on it. The biosensing sensitivity depends on the properties of chip surface. Higher binding capacity for biomolecules increases the signal levels and accuracy of analysis. The last several years
the chemical process in this case controls magnetism in carefully chosen strongly ferromagnetic material systems. The working principle used in this case is similar to the concept of lithium-ion batteries.
"UW researchers used chemical vapor deposition to grow graphene nanoribbons on germanium crystals. This technique flows a mixture of methane, hydrogen,
"Not only are designed our facilities to work with all different sorts of materials from metals to oxides,
"What's even more interesting is that these nanoribbons can be made to grow in certain directions on one side of the germanium crystal,
each face of a crystal (1, 1, 1) will have axes that differ from one (1, 1, 0) to the other (1, 0,
A tiny flake of graphene on silicon carbide and a futuristic-looking antenna and there it is the new graphene detector.
Wide spectral range achieved through silicon carbide substratethe choice of substrate has now proved a pivotal step in improving the little light trap."
but silicon carbide remains passive in the spectral range, "explained Stephan Winnerl. Then there is also an antenna which acts like a funnel and captures long-wave infrared and terahertz radiation.
which is located in the center of the structure on a silicon carbide substrate t
#Graphene flakes as an ultra-fast stopwatch Scientists at the Helmholtz-Zentrum Dresden-Rossendorf (HZDR), working with colleagues from the USA and Germany, have developed a new optical detector from graphene
A tiny flake of graphene on silicon carbide and a futuristic-looking antenna and there it is the new graphene detector.
Wide spectral range achieved through silicon carbide substrate The choice of substrate has now proved a pivotal step in improving the little light trap."
but silicon carbide remains passive in the spectral range, "explained Stephan Winnerl. Then there is also an antenna which acts like a funnel and captures long-wave infrared and terahertz radiation.
At that point, a reflective metal layer is on the bottom.""In this structure-unlike other photodetectors-light absorption in an ultrathin silicon layer can be much more efficient
At that point, a reflective metal layer is on the bottom.""In this structure-unlike other photodetectors-light absorption in an ultrathin silicon layer can be much more efficient
The technique was demonstrated with polystyrene particles i
#An important step in artificial intelligence: Researchers in UCSB's Department of Electrical and Computer engineering are seeking to make computer brains smarter by making them more like our own Abstract:
Measurement of a single nuclear spin in biological samples May 11th, 2015graphene holds key to unlocking creation of wearable electronic devices May 11th, 2015new Method to Produce Dual Zinc oxide Nanorings May 11th
Measurement of a single nuclear spin in biological samples May 11th, 2015graphene holds key to unlocking creation of wearable electronic devices May 11th, 2015new Method to Produce Dual Zinc oxide Nanorings May 11th
Measurement of a single nuclear spin in biological samples May 11th, 2015graphene holds key to unlocking creation of wearable electronic devices May 11th, 2015new Method to Produce Dual Zinc oxide Nanorings May 11th
Measurement of a single nuclear spin in biological samples May 11th, 2015graphene holds key to unlocking creation of wearable electronic devices May 11th, 2015new Method to Produce Dual Zinc oxide Nanorings May 11th
"This produces a surface consisting of a porous three-dimensional network of high-silica content glass that resembles microscopic coral."
Electrodes that so far have been used are made of very expensive elements such as platinum or platinum-iridium alloys.
This new composite presents some special talents. Firstly, it produces under sun light illumination a photovoltage of almost 0. 5 volts and very high photocurrent densities of up to 38 ma/cm2;
in order to optimize the properties of the novel composite photoelectrode device. The properties were optimal with a volumetric proportion of about 5%platinum (H2ptcl6) in the precursor solution."
In addition, it has been reported in the very recently published article that the composite shows high long-term stability over 25 hours
For example, after the implantation of an artificial ureter, urease crystals often start to grow inside
or into flexible chains through soft molecular linkers such as surface-grafted DNA or polymers. Here, we show that capillarity-mediated binding between magnetic nanoparticles coated with a liquid lipid shell can be used for the assembly of ultraflexible microfilaments and network structures.
it becomes pure tantalum, a metal. The researchers determined three related factors give the memories their unique switching ability.
and nanostructures to naturally occurring biological polymers, tissues and plant cells. The first application as part of DOE's Bioenergy Science Center was in the examination of plant cell walls under several treatments to provide submicron characterization.
They have managed also to use the polymer to build an L-shaped object that slowly walks forward as the temperature is raised repeatedly and lowered.
Hydrogels are polymers that can maintain large quantities of water within their networks. Because of this, they can swell
and then fixed them in place using a procedure called light-triggered in-situ vinyl polymerization, which essentially uses light to congeal a substance into a hydrogel.
The nanosheets ended up stuck within the polymer, aligned in a single plane. Due to electrostatic forces, the sheets create electrostatic resistance in one direction but not in the other.
which we calculated to be 32 degrees Celsius, the polymer rapidly changed shape, stretching in length.
As a demonstration of how the polymer could be put to practical use, the group designed an L-shaped piece of polymer that can actually walk, in a water environment,
as the legs lengthen and contract in response to changing temperature. The group now plans to conduct further studies to create substances that can be used in practical applications.
when it explored dramatically slowing the growth rate of the graphene crystals by decreasing the amount of methane in the chemical vapor deposition chamber.
the graphene crystals naturally grow into long nanoribbons on a specific crystal facet of germanium. By simply controlling the growth rate and growth time,
biocompatible polymer film made out of polyvinylidene fluoride, or PVDF. To improve the material's energy harvesting ability, they added DNA,
Related to these goals, we are developing approaches to inject and print gallium-based liquid metal alloys into varied materials for stretchable and reconfigurable electronics.
For energy devices we have demonstrated solution-processable approaches to fabricate organic photovoltaic devices on nearly arbitrary surfaces including PET and polymer reinforced polymer composites.
The presentation will also discuss the development of silver inks as an interconnect material for flexible Si CMOS ICS on elastomers.
'which are based on metals, polymers and organic materials, to tie the system together electronically. With our technology, we can take a razor-thin silicon integrated circuit, a few hundred nanometers thick,
the Wright-Patterson team has turned to liquid gallium alloys as an electrical interconnect material, Leever says."
"While these liquid alloys typically oxidize within minutes and become essentially useless, "he says, "the team has been able to dramatically reduce the effects of the oxidation through the use of ionic species confined to the walls of microvascular channels within the flexible substrates."
Rare and expensive metals such as platinum can serve as effective catalysts, but in its work the team discovered that it could create a much cheaper,
and safety of the new system is the special plastic membrane that separates the gases
The magnetic phase state at the edges of the antidots raised the metal-to-insulator phase transition temperature of the manganite film.
"The waste material is free compared compared to all the metals and expensive organic chemicals needed in other processes-in my opinion this is a far easier way to go."
and photoluminescence to optically probe the molecular structure of the phthalocyanine crystals.""Marrying these two techniques together is new;
and the boundaries in the crystals influence the movement of excitons. It's these boundaries that form a"barrier for exciton diffusion,
the team worked in the lab of UVM physics and materials science professor Randy Headrick to successfully form films with jumbo-sized crystal grains and"small angle boundaries."
A spin wave is caused by a perturbation of the local magnetisation direction in a magnetic material.
Research paves the way for alloys that are 3x stronger than steel yet bend like gum Abstract:
based on UNSW Australia research that can predict for the first time which combinations of metals will best form these useful materials.
Just like something from science fiction-think of the Liquid-Metal Man robot assassin (T-1000) in the Terminator films-these materials behave more like glass or plastic than metal.
While still being metals, they become as malleable as chewing gum when heated and can be moulded easily
They are also three times stronger and harder than ordinary metals on average, and are among the toughest materials known."
since the discovery of plastics more than 50 years ago,"says study author, Dr Kevin Laws, from UNSW Australia in Sydney.
Most metals are crystalline when solid, with their atoms arranged in a highly organised and regular manner.
Metallic glass alloys, however, have disordered a highly structure, with the atoms arranged in a non-regular way."
But until now, discovering alloy compositions that form these materials has required a lengthy process of trial and error in the laboratory,
They have used their model to successfully predict more than 200 new metallic glass alloys based on magnesium
"Metallic glass alloys are expensive to manufacture and to date have only been used in niche products,
Enclosed within the platelet membranes are made nanoparticle cores of a biodegradable polymer that can be metabolized safely by the body.
The nanoparticles can be packed with many small drug molecules that diffuse out of the polymer core and through the platelet membrane onto their targets.
The work, published Monday in the Proceedings of the National Academy of Sciences, pairs gold nanomesh with a stretchable substrate made with polydimethylsiloxane, or PDMS.
and fatigue has been a deadly disease for metals, "the researchers wrote.""We weaken the constraint of the substrate by making the interface between the Au (gold) nanomesh and PDMS slippery,
patterned silica material laid on top of a traditional solar cell. The material is transparent to the visible sunlight that powers solar cells,
Despite the high performance of metallic implants, including titanium and its alloys, in human body, the relatively weak corrosion resistance of the implants in the body and their inappropriate compatibility has resulted in a great challenge in the application of metallic alloys.
Therefore, Iranian researchers studied a type of composite nanocoating to obtain modified properties of biomaterials to be used in human body.
when the amount of diopside added to the base of hydroxyapatite increases up to 30 weight percent, the size of final composite grain and its size distribution significantly decreases after two steps of sintering process.
because the optimum conditions for applying nanocomposite coating through electrophoretic method on metals are obtained at low particle size distributions s
X-ray crystallography and cryo-electron microscopy to discover the tiny structural details of biomolecules. All these methods,
The synthesis of these fabrics will open new windows to the production of composites with conventional and innovative applications.
The researchers believe their new method is compatible with roll-to-roll manufacturing--an existing method for creating devices in bulk using a roll of flexible plastic and a processing machine.
industrial-quality metal deposited on polymer sheets. First, an electronic mechanical cutter is used to form patterns on the metal-polymer sheets.
Second, after removing excessive areas, the electronics are printed onto any polymer adhesives, including temporary tattoo films.
The cutter is programmable so the size of the patch and pattern can be customized easily.
some of the atoms in the anode--an electrically conductive metal like lithium--become ions that then travel to the cathode,
#Graphene teams up with two-dimensional crystals for faster data communications Ultra-fast detection of light lies at the heart of optical communication systems nowadays.
the research group led by Prof at ICFO Frank Koppens has shown that a two-dimensional crystal, combined with graphene,
but related two-dimensional crystals were still lagging very much behind. In our work we show that by teaming up these two materials,
and magnetic materials interact with each other due to their opposite magnetic ordering direction of magnetization: in magnetic layers storages the magnetic field tends to arrange spins in one direction,
"made of nanolayers of ferromagnetic material, superconductor and other metals. By changing the direction of magnetization it is possible to control the current in superconductor.
and transition metal dichalcogenides,"said Awschalom.""It's not just that it's faster and easier.
#Single atom alloy platinum-copper catalysts cut costs, boost green technology: New generation of catalysts demonstrated for selective hydrogenation of butadiene Abstract:
for example in polymer electrolyte membrane (PEM) fuel cells, which are the leading contenders for small-scale and mobile power generation not based on batteries or combustion engines.
in order to facilitate downstream polymer production. The current industrial catalyst for butadiene hydrogenation uses palladium and silver.
while a relatively cheap metal, is not nearly as catalytically powerful as platinum, noted Professor of Chemistry Charles Sykes, Ph d.,one of the senior authors on the paper."
"The researchers first conducted surface science experiments to study precisely how platinum and copper metals mix."
"We were excited to find that the platinum metal dissolved in copper, just like sugar in hot coffee, all the way down to single atoms.
We call such materials single atom alloys, "said Sykes. The Tufts chemists used a specialized low temperature scanning tunneling microscope to visualize the single platinum atoms and their interaction with hydrogen."
such as platinum-copper single atom alloy nanoparticles supported on an alumina substrate, and then tested them under industrial pressure and temperatures."
We believe this approach is also applicable to other precious metals if added as minority components in copper."
In the early 2000s, Maria's group had pioneered the single-atom approach for metals anchored on oxide supports as the exclusive active sites for the water-gas shift reaction to upgrade hydrogen streams for fuel cell use.
Together we embarked on a new direction involving single atom alloys as catalysts for selective hydrogenation reactions.
"Sykes and Flytzani-Stephanopoulos have used this approach to design a variety of single atom alloy catalysts that have,
and properties of single atom alloy surfaces and then applied this knowledge to develop a working catalyst.
The researchers make the film by first using a nanolithography developed in Chang's lab to create highly-ordered pores in a polymer substrate.
That porous polymer then serves as a template, which the researchers coats with a thin layer of aluminum oxide using atomic layer deposition.
The polymer is burned then off leaving behind a three-dimensional aluminum oxide coating.""We are able to control the thickness of the aluminum oxide,
"Using zinc oxide in the same process, we can create a thicker coating. And the thickness of the coating controls
usually a transition metal oxide. If a voltage is applied then, the ohmic resistance of the storage cell changes.
According to the researchers, the aim of the research was to prepare an injectable paste made of bioglass and sodium alginate polymer with biocompatibility properties.
Results of the research have been published in Journal of the Australian Ceramics Society vol. 51, issue 2, 2015, pp. 99-108 8
Finding could have implications for high-temperature superconductivity A team of physicists led by Caltech's David Hsieh has discovered an unusual form of matter--not a conventional metal, insulator,
first consider a crystal with electrons moving around throughout its interior. Under certain conditions, it can be energetically favorable for these electrical charges to pile up in a regular,
repeating fashion inside the crystal, forming what is called a charge-ordered phase. The building block of this type of order, namely charge, is simply a scalar quantity--that is,
When spins line up parallel to each other (in a crystal, for example), they form a ferromagnet--the type of magnet you might use on your refrigerator
The Hsieh group's experiment exploited the fact that changes in the symmetry of a crystal will affect the strength of each harmonic differently.
Since the emergence of multipolar ordering changes the symmetry of the crystal in a very specific way--a way that can be largely invisible to conventional probes--their idea was that the optical harmonic response of a crystal could serve as a fingerprint of multipolar order."
"We found that light reflected at the second harmonic frequency revealed a set of symmetries completely different from those of the known crystal structure,
of metal-organic frameworks (MOFS)- sponge-like 3d crystals with an extraordinarily large internal surface area-that feature flexible gas-adsorbing pores.
"Long is the corresponding author of a Nature paper that describes this work entitled,"Methane storage in flexible metal-organic frameworks with intrinsic thermal management."
because the gas must force its way into the MOF crystal structure, opening and expanding the pores.
"In addition, Long says, the step in the adsorption isotherm is associated with a structural phase change in the MOF crystal that reduces the amount of heat released upon filling the tank,
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