#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.
In dividing cells, these gaps are incredibly small at just 25 nanometers (3, 000 times thinner than a human hair.
about 120 nanometers (nm) thick that were deposited onto a plastic chip containing microfluidic wells in order to hold the PCR mixture and DNA sample.
Black silicon can be manufactured simply by adding a dense network of nanoscale needles on top of a standard piece of silicon.
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.
The machine then threads the rings around a nanoscopic chain (an axle) and squeezes them together.
A paper describing the research was published in the journal Nature Nanotechnology. You can see a video that visualizes the molecular pump process below.
Using poppy-seed sized droplets of water impregnated with magnetic nanoparticles (those handy little elements being used in everything from drug delivery in humans to creating e-paper whiteboards
To this, the researchers syringe in separate magnetic nanoparticle-infused droplets of water. They then surrounded the device with a series of large electromagnetic coils that,
The system doesn't require specially engineered nanomaterials like those used to make other paper-based batteries in the past.
The results of this research were published recently in the journal Nature Nanotechnology. The short video below is an animation showing how the graphene filaments generate Light source:
#Inkless printing manipulates light at the nanoscale to produce colors Using nanometer-size metamaterials, researchers at Missouri University of Science and Technology have developed a technique to print images that uses the manipulation of light, rather than the application of ink,
microminiature perforations are made in a multilayered structure consisting of two thin films of silver separated by a film of silica 45 nanometers thick.
The uppermost layer of silver film, just 25 nanometers deep, is punctured with miniscule holes using a focused ion-beam milling microfabrication process.
the researchers created holes with different diameters (ranging in size from 45 to 75 nanometers) corresponding to the desired absorption of light at various wavelengths.
This nanoscale"color palette"meant that the physical characteristics of the holes in the material determined the color displayed to accurately reproduce the S&t athletic logo"Unlike the printing process of an inkjet or laserjet printer,
The nanoscale perforations used to provide this color are so small as to only be visible with the help of an electron microscope,
As such, its unique properties may allow it to be used in ways not previously possible in the areas of nanoscale visual arts,
and had no toxic effects on living cells in the lab. The team also discovered that mixing the gel with silica nanoparticles gave it the ability to more effectively prevent bleeding,
"We have the potential to develop small and robust lab-on-a-chip devices for smartphones, "says Kort Bremer,
These transistors are each only 7 nanometers wide that's about 1/10, 000th the width of a human hair and three times the width of a single strand of DNA.
Department of Electrical & Computer engineering had to come up with a way to incorporate highly luminescent colloidal quantum dot nanoparticles into perovskite.
"We started by building a nanoscale scaffolding'shell'around the quantum dots in solution, then grew the perovskite crystal around that shell so the two faces aligned,
and holes generated in the larger bandgap of the perovskite are transferred with 80 percent efficiency to become excitons in the quantum dot nanocrystals.
paving the way for the next generation of nanomaterials and miniaturized electronics. For our electronics to become more powerful it's vital that the transistors,
A single silicon atom is about half a nanometer in size meaning that, in the current generation of electronics,
Tiny molecular transistors much smaller than the ones inside our computers (as small as two nanometers) have already been built,
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
and a half times as effective at collecting the pollutant than traditionally structured nanoparticles. e are excited very about the results,
By embedding indium tin oxide (ITO) nanocrystals in glass imbued with niobium oxide, the research team created an electrochromic material that's able to transmit
"We believe our deliberately crafted nanocrystal-based materials could meet the performance and cost targets needed to progress toward commercialization of smart windows. d
which is strong enough to stabilize various types of compounds, such as antibodies, enzymes, nanoparticles, antibiotics and growth factors, by acting as a protective"cocoon"."
. gold nanoparticles printed on paper, which has potential applications in a variety of areas, such as color engineering, surface plasmon resonance based sensing and bio-imaging. enzymes printed on paper,
Led by nanoscientist Ani Sumant of Argonne Center for Nanoscale Materials (CNM) and Argonne Distinguished Fellow Ali Erdemir of Argonne Energy systems Division, the Argonne team combined diamond
nanoparticles, small patches of graphene, and a diamond-like carbon material to create superlubricity, a highly-desirable property in
the graphene rolls itself around the diamond particle, creating something that looks like a ball bearing on the nanoscopic level. he interaction between the graphene
or scrolls, the team found a way to translate the nanoscale superlubricity into a macroscale phenomenon.
The team used large-scale atomistic computations on the Mira supercomputer at the Argonne Leadership Computing Facility to prove that the effect could be seen not merely at the nanoscale
a computational nanoscientist at Argonne and co-author of a paper describing the work in Science Express.
or turbines to computer hard disks and microelectromechanical systems, said Sumant e
#World thinnest lightbulb developed using graphene A postdoctoral research scientist, Young Duck Kim, has led a team of scientists from Columbia, Seoul National University (SNU),
is published in the Advance Online Publication on Nature Nanotechnology website on June 15. ee created what is essentially the world thinnest light bulb,
Wrapping carbon nanotube sheets into fibers In a study published in the July 24 issue of the journal Science,
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.
an author on the paper and chief research and intellectual properties strategist at Lintec of America Nanoscience & Technology Center. he rubber cores used for these sheath-core fibers are inexpensive and readily available,
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.
and bionic nanosystems. Another important application area could be combinatorial screening of biomolecular gradients drugs, toxins, pollutants,
we render these capsules stimuli-responsive by incorporating gold nanorods into the polymer shell, allowing for highly selective photothermal rupture
Smartphone-Based 3d printed Diagnostic Device for Viruses (3ders. org) A team of researchers from the California Nanosystems Institute at UCLA has created a low-cost,
which the company says could boost computing power of verything from smartphones to spacecraft. he company unveiled the industry first seven-nanometer chip that could hold more than 20 billion tiny switches or transistors for improved computing power.
Most chips today in PCS and other devices use microprocessors between 14 and 22 nanometers.
Researchers have developed a new type of nanoparticle that they call nanostars which accumulate in tumor cells
The particles are each about 140 nanometers (0. 000005 inches) across and consist of eight-point gold stars that are surrounded by a layer of dye
because earlier efforts to make such nanoparticles weren't able to produce the consistent shapes needed said Dr. Moritz Kircher a molecular imaging specialist at Memorial Sloan Kettering Cancer Center in New york city.
The nanoparticles can't enter noncancerous cells in the body so only the cancer cells light up.
The researchers found that the nanoparticles caused bright spots where cancer cells and even precancerous cells were hiding.
Cancerous cells have larger pores in the blood vessels that nourish them allowing the nanoparticles through.
These new nanoparticles would show where the dangerous cells are and make the surgery a lot more precise he said.
Earlier experiments with nanoparticles often required them to be built to order coated with proteins that would link to specific types of cancer cells.
But before these nanoparticles get to the clinic there is still work to be done testing their toxicity
This is really good work concerning nanotechnology and it's application said Andrey Kuzmin professor of physics at the Institute for Lasers Photonics
Kuzmin's team has done also extensive work on nanoparticles. He added that the use of the star shape was new as most previous gold nanoparticles were more like rods.
The work appears in today's (Jan 21) issue of Science Translational Medicine e
#Bye bye Baubles: New 3d printers Could Build Implants Electronics Several new 3d printers showcased at CES 2015 in Las vegas earlier this month suggest that the 3d printing industry best known for churning out brightly colored plastic doodads could be turning over a new
and nanotechnology as well as the completion of a device that may improve quality of life in indoor settings, from hospitals to underground parking garages.
the scientists could reconstruct the location of the molecules at the nanometer scale. Here how it works:
The ability to peer into the nanoworld of living cells to observe, for example, how proteins aggregate in the earliest stages of diseases like Alzheimer
but is, thanks to metal nanoparticles that can squeeze light into small volumes. These tiny lasers are promising light sources that can be used to send
Construction of our nanolaser required precise control over the shape and location of the adjacent gold nanoparticles.
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.
In experiments, the ribbons were as small as 100 nanometers wide, or about 1, 000 times thinner than the average human hair,
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,
Instead of performing experiments with dozens of test tubes, each droplet in a lab-on-a-chip can serve as a microscopic test tube,
these droplets were infused with tiny magnetic particles only nanometers, or billionths of a meter, wide.
This electron microscope image shows tiny nanoparticles of bismuth ferrite embedded in a polymer film. The film enhances the unique electric and magnetic properties of bismuth ferrite and preserves these properties even when bent.
The researchers synthesized nanoparticles of bismuth ferrite and mixed them into a polymer solution. The solution was dried in a series of steps at increasing temperatures to produce a thin flexible film.
Mixing nanoparticles of bismuth ferrite into a polymer improved the current-leakage problem and also gave the film flexible stretchable properties.
#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.
Because these spores store water in very small, nanometer scale spaces, they respond dramatically to pressure changes caused by evaporating moisture.
Javier Sanchez-Yamagishi has built several hundred nanoscale stacked graphene systems to study their electronic properties."
The group, under the direction of Latha Venkataraman, associate professor of applied physics at Columbia Engineering, is the first to develop a single-molecule diode that may have real-world technological applications for nanoscale devices.
Their paper,"Single-Molecule Diodes with High On-Off Ratios through Environmental Control,"is published May 25 in Nature Nanotechnology."
"Constructing a device where the active elements are only a single molecule has long been a tantalizing dream in nanoscience.
which has been the'holy grail'of molecular electronics ever since its inception with Aviram and Ratner's 1974 seminal paper, represents the ultimate in functional miniaturization that can be achieved for an electronic device."
the field of molecular electronics has become ever more critical in solving the problem of further miniaturization,
it can be applied to all nanoscale devices of all types, including those that are made with graphene electrodes."
has been developing sustainable nanomaterials since 2009.""If you take a big tree and cut it down to the individual fiber,
#Nanotechnology helps protect patients from bone infection Leading scientists at the University of Sheffield have discovered nanotechnology could hold the key to preventing deep bone infections,
Scientists used revolutionary nanotechnology to work on small polymer layers inside implants which measure between 1 and 100 nanometers (nm) a human hair is approximately 100,
000 nm wide. Lead researcher Paul Hatton, Professor of Biomaterials Sciences at the University of Sheffield, said:
this new application for nanotechnology could save health providers such as the NHS millions of pounds every year. ource:
Most other investigators who have studied the remarkable properties of microscopic spirals have done so by arranging discrete nanoparticles in a spiral pattern:
#Engineers show how'perfect'materials begin to fail at the nanoscale Crystalline materials have atoms that are lined neatly up in a repeating pattern.
Now that nanotechnological advances have made such materials a reality, however, researchers at the University of Pennsylvania and Germany Max Planck Institute for Intelligent Systems have shown how these defects first form on the road to failure.
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.
t also about different properties that arise in materials at the nanoscale. hen you make these really small structures,
and can control the properties of the nanoscale material. The researchers grew palladium nanowires through a vapor deposition method at high temperature,
which provided each atom with the time and energy to move around until it found its preferred spot in the metal crystalline structure.
functions like an industrial mechanical testing machine at the nanoscale. Welding a nanowire to a grip attached to a series of slanted bars that expand
when heated by an electric current, 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
but on a much smaller scale, using techniques common in the manufacture of microelectromechanical systems to produce dense arrays of tiny emitters.
The work is n elegant and creative way of demonstrating the strong capability of traditional MEMS microelectromechanical systems fabrication processes toward parallel nanomanufacturing
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
but on a much smaller scale, using techniques common in the manufacture of microelectromechanical systems to produce dense arrays of tiny emitters.
The work is n elegant and creative way of demonstrating the strong capability of traditional MEMS microelectromechanical systems fabrication processes toward parallel nanomanufacturing
right Visible light Emission from Graphene, is published in the Advance Online Publication (AOP) on Nature Nanotechnology's website on June 15."
plants that are exposed to sunlight use carefully organized nanoscale structures within their cells to rapidly separate charges pulling electrons away from the positively charged molecule that is left behind,
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
plants that are exposed to sunlight use carefully organized nanoscale structures within their cells to rapidly separate charges pulling electrons away from the positively charged molecule that is left behind,
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
"This gives us unparalleled insight into nanoparticle structure and would be impossible to achieve without combining two complementary operando techniques."
They conducted x-ray studies at the National Synchrotron Light source (NSLS) and electron microscopy at the Center for Functional Nanomaterials (CFN), both DOE Office of Science User Facilities."
a focused electron beam passes through the sample and captures images of the nanoparticles within.
Particles smaller than a single nanometer were hidden behind what we call the resolution curtain of the technique."
and removed the TEM results covering particles larger than one nanometer-the remainder fills in that crucial subnanometer gap in our knowledge of catalyst size
Series of scanning transmission electron microscopy (STEM) images of platinum nanoparticles, tracking their changes under different atmospheric pressure reaction conditions.
Korean Scientists at the Center for Nanoparticle Research, Institute for Basic Science (IBS) in Seoul,
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 discovery, published today in the journal Nature Nanotechnology, was made in the lab of Federico Capasso, the Robert L. Wallace Professor of Applied Physics and Vinton Hayes Senior Research Fellow in Electrical engineering at the Harvard John A. Paulson School of engineering and Applied science (SEAS)."
Nano-optics is a major part of the future of nanotechnology and this research furthers our ability to control
and harness the power of light on the nanoscale.""The creation and control of surface plasmon wakes could lead to new types of plasmonic couplers
or focus light at the nanoscale. Surface plasmons are confined to the surface of a metal.
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.
#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,
a ubiquitous substance found in all plant cells. The findings introduce ideas for better, greener and safer nanotechnology and could lead to enhanced efficiency of antimicrobial products used in agriculture and personal care.
Environmentally friendly lignin nanoparticle'greens'silver nanobullet to battle bacteria In a study being published in Nature Nanotechnology July 13,
North carolina State university engineer Orlin Velev and colleagues show that silver-ion infused lignin nanoparticles, which are coated with a charged polymer layer that helps them adhere to the target microbes,
effectively kill a broad swath of bacteria, including E coli and other harmful microorganisms. As the nanoparticles wipe out the targeted bacteria,
they become depleted of silver. The remaining particles degrade easily after disposal because of their biocompatible lignin core,
"People have been interested in using silver nanoparticles for antimicrobial purposes, but there are lingering concerns about their environmental impact due to the long-term effects of the used metal nanoparticles released in the environment,
"said Velev, INVISTA Professor of Chemical and Biomolecular engineering at NC State and the paper's corresponding author."
"The researchers used the nanoparticles to attack E coli, a bacterium that causes food poisoning; Pseudomonas aeruginosa, a common disease-causing bacterium;
The nanoparticles were effective against all the bacteria. The method allows researchers the flexibility to change the nanoparticle recipe in order to target specific microbes.
Alexander Richter, the paper's first author and an NC State Ph d. candidate who won a 2015 Lemelson-MIT prize,
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