#New Technique Increases Nanofiber Production Rate Fourfold Nanofibers polymer filaments only a couple of hundred nanometers in diameter have a huge range of potential applications, from solar cells
In the latest issue of the journal Nanotechnology, MIT researchers describe a new technique for producing nanofibers that increases the rate of production fourfold
efficient nanofiber production. e have demonstrated a systematic way to produce nanofibers through electrospinning that surpasses the state of the art,
where you would be able to individually control each emitter to print deposits of nanofibers.
Tangled tale Nanofibers are useful for any application that benefits from a high ratio of surface area to volume solar cells, for instance,
Nanofibers can also yield materials that are permeable only at very small scales, like water filters,
The standard technique for manufacturing nanofibers is called electrospinning, and it comes in two varieties. In the first, a polymer solution is pumped through a small nozzle,
#Niobium Nanowire Yarns Make High-performance Supercapacitors Using yarns made from niobium nanowire, researchers at MIT have developed a new approach to making supercapacitors.
The new approach uses yarns, made from nanowires of the element niobium, as the electrodes in tiny supercapacitors (which are essentially pairs of electrically conducting fibers with an insulator between).
Among nanomaterials, carbon-based nanoparticles such as carbon nanotubes and graphene have shown promising results, but they suffer from relatively low electrical conductivity,
and that niobium nanowire yarn is a promising alternative. magine youe got some kind of wearable health-monitoring system,
The new nanowire-based supercapacitor exceeds the performance of existing batteries, while occupying a very small volume. f youe got an Apple Watch and
Other groups have made similar supercapacitors using carbon nanotubes or other materials, but the niobium yarns are stronger and 100 times more conductive.
Overall, niobium-based supercapacitors can store up to five times as much power in a given volume as carbon nanotube versions.
500 degrees Celsius so devices made from these nanowires could potentially be suitable for use in high-temperature applications.
individual niobium nanowires are just 140 nanometers in diameter 140 billionths of a meter across,
and carbon nanotubes that could be woven into clothing. At the time these fibers were said to obtain the highest volumetric energy density reported for carbon-based microscale supercapacitors (6. 3 microwatt-hours per cubic millimeter,
However carbon nanotubes are still expensive not to mention the fact that there is still some debate about their possible toxicity.
#Nanowires Boost Hydrogen Production from Sunlight Tenfold Using the energy of the sun to split water into hydrogen
when illuminated by sunlightade from an array of gallium phosphide nanowires. Previously, researchers used flat surfaces of the semiconductor gallium phosphide as the photocathode,
The Gap nanowires, about 500 nm long and 90 nm thick, increased enormously the surface of the photocathode exposed to light.
At the same time, the nanowires allowed a drastic reduction in the use of Gap material . or the nanowires we needed ten thousand times less precious Gap material than in cells with a flat surface.
That makes these kinds of cells potentially a great deal cheaper said Erik Bakkers of Eindhoven University of Technology,
The fiber, made from sheets of carbon nanotubes wrapped around a rubber core, can be stretched to 14 times its original length
In research published in the journal Science, the team describes how they devised a method for wrapping electrically conductive sheets of carbon nanotubes around the rubber core in such a way that the fiber's resistance doesn change when stretched,
but its conductivity increases. e make the inelastic carbon nanotube sheaths of our sheath-core fibers super stretchable by modulating large buckles with small buckles,
and then another carbon nanotube sheath to create strain sensors and artificial muscles. In this setup, the buckled nanotube sheets act as electrodes
and the thin rubber coating serves as the dielectric. Voilà! You have a fiber capacitor. his technology could be well-suited for rapid commercialization,
The only exotic component is the carbon nanotube aerogel sheet used for the fiber sheath
#The First White Laser Scientists and engineers at Arizona State university, in Tempe, have created the first lasers that can shine light over the full spectrum of visible colors.
and solid phases of the different materials that made up this nanosheet, they ensured that these different crystals could coexist.
The scientists can individually target each segment of the nanosheet with a light pulse. Varying the power of the light pulses that each section received tuned how intensely they shone,
The company is also developing another thermoelectric material based on silicon nanowires that could convert a higher percentage of the energy in waste heat to electricity.
Nanopore Sequencing). ) It's built by a U k. company Oxford Nanopore that has raised $292 million and spent 10 years developing Deamer's idea into a DNA sequencer unlike any other now available.
It is four inches long and gets its power from a USB port on a computer.
and T. Scientists with early access to prototypes of the first commercial nanopore sequencer say it's glitchy
After testing it Mick Watson a bioinformatics researcher at the Roslin Institute in Scotland says nanopore sequencing is a disruptive technology that could potentially dominate the sequencing market for years to come.
But now some big companies are betting that nanopores could be the technology to break Illumina's lucrative monopoly.
Roche which made a failed attempt to acquire Illumina in 2012 this year spent $125 million to buy Genia Technologies a small nanopore company based in California
Hitachi is also working on nanopore technology as are startups like Electronic Biosciences. Deamer says the idea of nanopore sequencing occurred to him in 1989 just three years after the first automated DNA sequencers were introduced.
He had been trying to build artificial cells spherical blobs of fat that could pump molecules in
By this spring Oxford had worked the bugs out enough at any rate to start mailing out beta versions of the nanopore sequencer to 500 hand-picked labs it is collaborating with.
To the technology s original inventors the arrival of any commercial nanopore sequencer is a milestone.
Yet nanopore sequencing is so different that even a machine that s error-prone might be a boon to science.
Nanopore sequencing may help because it produces what scientists call long reads. For instance Akeson says this summer his lab read across a continuous strand of human DNA that was 79000 letters long.
Nanostructures have a very high surface area and are lightweight a combination that could make for a fast-charging battery that stores a lot of energy in a convenient package.
The lubricant clings to the nanostructures and forms an extremely thin liquid film on the surfaces that is perfectly smooth,
using similar DNA NANOSTRUCTURES presented in this research, and these structures will be a guide for developing future research,
physicists have shown now that the production of low energy electrons by radio-sensitizers made of carbon nanostructures hinges on a key physical mechanism referred to as plasmons-collective excitations of so-called valence electrons;
Alternatives sensitizers could be made of carbon-based nanostructures, 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.
#DNA NANOSTRUCTURES Assembled in Waterless Solvent Researchers at the Georgia Institute of technology have shown now that they can assemble DNA NANOSTRUCTURES in a solvent containing no water.
we have shown that DNA NANOSTRUCTURES can be assembled in a water-free solvent, and that we can mix water with the same solvent to speed up the assembly.
and have the DNA structures remain intact in the water-free solvent. he assembly rate of DNA NANOSTRUCTURES can be very slow,
At Georgia Tech he evaluated new solvents for use with DNA NANOSTRUCTURES, solvents that had been designed for other purposes.
he added. inetic traps are among the bottlenecks for producing more complicated DNA NANOSTRUCTURES. lycholine is miscible in water,
and Nicholas V. Hud, olding and Imaging of DNA NANOSTRUCTURES in Anhydrous and Hydrated Deep-Eutectic Solvents,(Angewandte Chemie International, 2015).
#Protein nanostructures being developed as calibration standards for electron microscopy Demand for traceability, which accompanies improved technologies,
Near-crystalline protein nanostructures assembled from geometrically consistent building blocks can offer this property. A team from NPL has engineered recently a microscopic specimen exhibiting single-nanometre spacings (as shown in the image.
researchers lay out a mesh of nanowires sandwiched in layers of organic polymer. The first layer is dissolved then, leaving the flexible mesh,
#Carbon nanotube-Based Water Desalination and Purification Technology Awarded Patent Mitra's new carbon nanotube immobilized membrane (CNIM) is an energy-efficient device designed to filter higher concentrations of salt than is currently feasible through reverse osmosis, one of the standard
Mitra, who has conducted research on carbon nanotubes for the past 15 years created a novel architecture for the membrane distillation process by immobilizing carbon nanotubes,
which are an atom thick and about 10,000 times smaller than a human hair in diameter, in the membrane pores.
"One of the key characteristics of carbon nanotubes is their capacity to both rapidly absorb water vapor as well as industrial contaminants,
we replaced different areas in the original image with different nanostructures with specified hole sizes to represent various visible colors,
Researchers from Trinity college Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN), partnered with collaborators from ITMO University Optics of Quantum Nanostructures laboratory in a joint experiment to show that standard nanocrystals were made up a 50:50
Yurii Gun'ko, professor at Trinity college and co-director of International Research and Education Centre for Physics of Nanostructures at ITMO University comments on potential applications of the method developed by the group:
he does the electrochemistry and nanostructures, "she said. As for the biological component, Gomes said she is using"nanobrushes"specially designed to grab particular bacteria.
#Vibrations of Water-Carrying Nanotubes for Improved Water filtration Systems Together, unsafe drinking water and the inadequate supply of water for hygiene purposes contribute to almost 90%of all deaths from diarrheal diseases
The research project involves the minute vibrations of carbon nanotubes called"phonons, "which greatly enhance the diffusion of water through sanitation filters.
"Through phonon oscillations--vibrations of water-carrying nanotubes--water transport can be enhanced, and sanitation and desalination improved.
such vibrations produce a 300%improvement in the rate of water diffusion by using computers to simulate the flow of water molecules flowing through nanotubes.
or energy conservation, e g. membranes with boron nitride nanotubes. Crowdsourcing the solutionthe project, initiated by IBM's World Community Grid,
The metamaterial, a nanostructure of rotated slits etched into a gold film, changes the phase of the surface plasmons generated at each slit relative to each other
The nanostructure also acts like the boat's rudder, allowing the wakes to be steered by controlling the speed of the running wave.
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
#Gallium Phosphide Nanowires Significantly Increase Efficiency of Solar fuel Cells The solar cell made of gallium phosphide (Gap) generates clean fuel hydrogen gas from Water gap is a compound containing phosphide and gallium which also acts
If the gallium phosphide is processed in the form of tiny nanowires, the efficiency of the solar cell can be increased tenfold without using considerable amounts of costly material.
The team resolved this issue by fabricating a network of small Gap nanowires which measured 90nm in width and 500nm in length.
or the nanowires we needed ten thousand less precious Gap material than in cells with a flat surface.
#Novel Fabrication Technique Helps Produce Ultra-Thin Hollow Platinum Nanocages for Fuel cells Researchers from Georgia Tech, University of Wisconsin-Madison, Oak ridge National Laboratory,
The new method allows the production of hollow platinum nanocages with ultra-thin walls. These atomic-scale layers of platinum are produced through a solution-based approach
porous structures that induce catalytic activity within and outside the nanocages. The layers are grown on templates of palladium nanocrystal templates.
leaving behind nanocages with a diameter of approximately 20 nm, and between three and six atom-thin platinum layers.
When these nanocage structures are used in fuel cell electrodes, platinum's utilization efficiency can be increased by a factor of seven,
and Biochemistry and the School of Chemical and Biomolecular engineering at Georgia Tech. e have made hollow nanocages of platinum with walls as thin as a few atomic layers
As both the inner and outer layers of the porous nanocages play a vital role in catalytic activity,
With the use of palladium nanocrystals as templates, the nanocages can be formed in either cubic or octahedral shapes.
The surface structure is controlled by the shape of the nanocages, which further leads to modifications in the catalytic activity.
Upon evaluating the durability of the platinum nanocages for oxygen-reduction reaction, the researchers observed that there is a fall in the catalytic activity by slightly more than one-third after 10,000 operating cycles.
However, the platinum nanocages could be used in other industrial processes such as hydrogenation. Besides carrying out experimental work at Georgia Tech,
researchers at Arizona State university and Oak ridge National Laboratory mapped the nanocage structures using their specialized microscopy facilities.
and measure chemical and biological molecules using a broadband nanostructure that traps wide range of light,
from the school Bourns College of Engineering, involves a new paperlike material made from silicon in the form of spongy silicon nanofibers.
each silicon nanofiber is more than 100 times thinner than your hair. That why, although each fiber is spongelike,
The Bourns team resolved that problem by upcycling silicon into a mass of nanofibers enabling the battery to cycle hundreds of times without degrading.
Carbon Coated Silicon Nanofiber Paper via Mg Reduction of Electrospun Sio2 Nanofibers, published in Nature Scientific Reports.
the described 3d porous Si-C nanocomposite has a great potential as a practical anode material for Li-ion batteries.
A thin liquid crystal layer is sandwiched over a metallic nanostructure shaped like a microscopic egg carton that absorbs some light wavelengths
Nanowire...Forget the Insane Mode: Elon musk says Tesla's new...'We're changing the conversation from top speeds,
he schemes involve geometric transformation of 2d micro/nanostructures into extended 3d layouts by compressive buckling,
passivating film on the nanostructures by a process known as atomic layer deposition, and by integrating all of the metal contacts on the cell back side.
Up until now, most attempts at improving the stability of engineered DNA nanostructures have looked to use whole different versions of DNA, a class of synthetic nucleic acids collectively called XNA.
A single electron caught in a semiconductor nanostructure can structure the most fundamental of building blocks for a quantum computer.
Thomas Sand Jespersen an associate professor at the University of Copenhagen who helped create the material says it's a way to make a perfect transition between the nanowire and a superconductor.
Nanowires are extremely thin nanocrystal threads used in the development of new electronic components like transistors and solar cells.
Part of the challenge of working with nanowires is creating a good transition between these nanowires and an electrical contact to the outside world.
Up until now researchers have cultured nanowires and the contact separately. However with the new approach both the quality and the reproducibility of the contact have improved considerably.
The atoms sit in a perfectly ordered lattice in the nanowire crystal not only in the semiconductor and the metal but also in the transition between the two very different components which is significant in itself explains Peter Krogstrup an assistant professor who helped develop the contact.
Krogstrup says it is the ultimate limit to how perfect a transition one could imagine between a nanowire crystal and a contact.
and its properties and has shown also that they can make a chip with billions of identical semiconductor-metal nanowire hybrids.
#Inexpensive Technique Developed to Manufacture Nanofibers Scientists at the University of Georgia say they have developed an inexpensive way to manufacture nanofibers,
and safe means for producing large quantities of nanofibers that can be embedded with a multitude of materials,
Thousands of times thinner than the average human hair, nanofibers are used by medical researchers to create advanced wound dressings and for tissue regeneration
"The process we have developed makes it possible for almost anyone to manufacture high-quality nanofibers without the need for expensive equipment,
but it also makes it possible for more businesses and researchers to experiment with nanofibers without worrying too much about their budget."
"Currently, the most common nanofiber manufacturing technique, called electrospinning, uses high-voltage electricity and specially designed equipment to produce the polymer strings.
"In contrast to other nanofiber spinning devices, most of the equipment used in our device is said simple
"At laboratory scale, a v simple handcrafted setup is capable of producing spools containing hundreds of yards of nanofibers in a matter of seconds.
forming a nanofiber string that winds around the platter as it continues to spin. The device can spin at more than 1
000 revolutions per minute, enough time to create more than 50 kilometers (or about 31 miles) of ultra-thin nanofiber.
just as thin and just as strong as nanofibers created through other methods, "he said.""Plus, users don't have to worry about the safety issues of using high voltages or the complexity of other machines."
"The researchers can use this method to create a variety of nanofibers simply by changing the polymer placed in the syringe.
for example, create specially designed nanofibers that will promote the growth of stem cells. Fibers like these are used currently to create scaffolding for lab-grown tissues and organs.
Nanofibers can also be loaded with proteins, nanotubes, fluorescent materials and therapeutic agents.""We can use almost any kind of polymer with this platform,
and we can tailor make the nanofibers for different applications, "explained Dr. Minko.""It's like cooking.
acting like a chemical and electronic shield, on top of the nanostructures. They also integrated all the metal contacts on the back side of the cell, for added absorption.
If exploited, this knowledge could help us build molecular nanostructures with a very precise control over single electrons, leading to new types of high-performance semiconductors and nanomaterials r
Wrapping carbon nanotube sheets into fibers In a study published in the July 24 issue of the journal Science,
electrically conductive sheets of tiny carbon nanotubes to form a jellyroll-like sheath around a long rubber core.
senior author of the paper and director of the Alan G. Macdiarmid Nanotech Institute at UT Dallas. One key to the performance of the new conducting elastic fibers is the introduction of buckling into the carbon nanotube
the carbon nanofibers form a complex buckled structure, which allows for repeated stretching of the fiber. hink of the buckling that occurs
the Robert A. Welch Distinguished Chair in Chemistry at UT Dallas. e make the inelastic carbon nanotube sheaths of our sheath-core fibers super stretchable by modulating large buckles with small buckles,
Radical electronic and mechanical devices possible By adding a thin overcoat of rubber to the sheath-core fibers and then another carbon nanotube sheath
which the buckled nanotube sheaths serve as electrodes and the thin rubber layer is a dielectric, resulting in a fiber capacitor.
she said. he only exotic component is the carbon nanotube aerogel sheet used for the fiber sheath. o
#3d-Printed Graphene Nanoflakes May Play Role in Regenerative medicine and Tissue Engineering (3d printing Industry) A research team at Northwestern University has begun printing three-dimensional structures with graphene nanoflakes.
The team, led by Ramille Shah, assistant professor of Materials science and engineering at the Mccormick School of engineering and Surgery at the Feinberg School of medicine, has developed a new kind of graphene ink that can be used to print large 3d structures.
we render these capsules stimuli-responsive by incorporating gold nanorods into the polymer shell, allowing for highly selective photothermal rupture
That such nanostructures could even be made is because of the decades-long investment by the electronics industry in developing nanofabrication tools to make the tiny components in computers.
and schemes provide immediate paths to broad and previously inaccessible classes of 3d micro-and nanostructures in a way that is compatible with the highest-performance materials and processing techniques available,
#Electromagnetic field Activated Drug Loadded Nanowires Drug releasing implants can be of great benefit for conditions requiring long term treatment in a targeted area of the body.
Researchers at Purdue University have come up with a new way of releasing drugs into the body in a controlled manner using tiny injectable nanowire implants.
In a new study, published in Nature Materials("Measuring surface dislocation nucleation in defect-scarce nanostructures),
"they stretched defect-free palladium nanowires, each a thousand times thinner than a human hair, under tightly controlled conditions.
This thermal uncertainty in the failure limit suggests that the point where a failure-inducing defect first appears is on the nanowire surface,
which cuts across the nanowire, causing it to break. The study was led by graduate student Lisa Chen and associate professor Daniel Gianola of the Department of Materials science and engineering in Penn School of engineering and Applied science.
The researchers grew palladium nanowires through a vapor deposition method at high temperature, which provided each atom with the time
Welding a nanowire to a grip attached to a series of slanted bars that expand
the researchers could then stretch the nanowire in a controlled way. By repeatedly ramping up the voltage to a different maximum and bringing it down at the same rate,
Gianola said. ur goal was to deduce the point where the first of the nanowire atoms begin to shift out of their original positions
Absent defect-free nanowires to run physical experiments upon, earlier theories and analyses suggested that the relationship between temperature
knowing the temperature would allow one to estimate a nanowire failure limit. By conducting their stretching experiments at various temperatures,
but you have to take a different approach to specify the strength of the nanowire.
Understanding the origin of the distribution of strengths in nanostructures will allow for more rational design of devices. ntil recently,
t been very difficult to make defect-free nanowires. But now that we can, there a reason to care about how they fail.
Nanofibers-polymer filaments only a couple of hundred nanometers in diameter have a huge range of potential applications, from solar cells to water filtration to fuel cells.
In the latest issue of the journal Nanotechnology, MIT researchers describe a new technique for producing nanofibers that increases the rate of production fourfold
efficient nanofiber production. e have demonstrated a systematic way to produce nanofibers through electrospinning that surpasses the state of the art,
where you would be able to individually control each emitter to print deposits of nanofibers. angled talenanofibers are useful for any application that benefits from a high ratio of surface area to volume solar cells, for instance,
Nanofibers can also yield materials that are permeable only at very small scales, like water filters,
The standard technique for manufacturing nanofibers is called electrospinning, and it comes in two varieties. In the first
Nanofibers-polymer filaments only a couple of hundred nanometers in diameter have a huge range of potential applications, from solar cells to water filtration to fuel cells.
In the latest issue of the journal Nanotechnology, MIT researchers describe a new technique for producing nanofibers that increases the rate of production fourfold
efficient nanofiber production. e have demonstrated a systematic way to produce nanofibers through electrospinning that surpasses the state of the art,
where you would be able to individually control each emitter to print deposits of nanofibers. angled talenanofibers are useful for any application that benefits from a high ratio of surface area to volume solar cells, for instance,
Nanofibers can also yield materials that are permeable only at very small scales, like water filters,
The standard technique for manufacturing nanofibers is called electrospinning, and it comes in two varieties. In the first
Unlike their predecessors, the team at IBS stayed away from things like carbon nanotubes and gold and looked at a more utilitarian option for their build material:
thin slivers of silver nanowires. The silver nanowires are tiny, averaging#150 nm in diameter and#30 m in length (a human hair ranges from 17 to 181 m). The nanowires were mixed into a liquid elastic material
which is both soft and stretchy when dry. To ensure that the material remains tight on the target area while heating,
the team devised a 2-D interlocking coil pattern for the mesh structure. To make the mesh,
The metamaterial, a nanostructure of rotated slits etched into a gold film, changes the phase of the surface plasmons generated at each slit relative to each other
The nanostructure also acts like the boat's rudder, allowing the wakes to be steered by controlling the speed of the running wave.
Energy trapped on the surface of the nanocube in this fashion is called a plasmon. The plasmon creates an intense electromagnetic field between the silver nanocube
and a thin sheet of gold placed a mere 20 atoms away. This field interacts with quantum dotspheres of semiconducting material just six nanometers widehat are sandwiched in between the nanocube and the gold.
The quantum dots, in turn, produce a directional, efficient emission of photons that can be turned on and off at more than 90 gigahertz. here is great interest in replacing lasers with LEDS for short-distance optical communication,
The group is now working to use the plasmonic structure to create a single photon source necessity for extremely secure quantum communicationsy sandwiching a single quantum dot in the gap between the silver nanocube and gold foil.
Overtext Web Module V3.0 Alpha
Copyright Semantic-Knowledge, 1994-2011