or silica creating a thin liquid layer that smooths out nanoscale'valleys'in the platinum
"Innovative substrate engineering for high quality 2d nanomaterials")'Not only can we make millimetre-sized graphene flakes in minutes
This invention adds to the growing patent portfolio of nanomaterials and their production technologies from Professor Nicole Grobert's Nanomaterials By design Group.
and sell her range of specialty nanomaterials as part of a new business venture e
#Scientists hijack light-loving bacteria to make high-value products (Nanowerk News) Scientists have directed a common bacterium to produce more of a valuable fatty acid, lauric acid,
#Novel method creates nanowires with new useful properties (Nanowerk News) Harvard scientists have developed a first-of-its-kind method of creating a class of nanowires that one day could have applications in areas ranging from consumer electronics to solar panels.
The technique is described in a paper recently published in the journal Nature Nanotechnology("Plateaurayleigh crystal growth of periodic shells on one-dimensional substrates"A new,
but researchers for years have recognized a similar phenomenon in nanowires. When heated to extreme temperatures
Day and Mankin heated traditionally grown nanowires to just below that transformation point in a vacuum chamber,
when nanowires break down at high temperatures. Unlike with the droplets, though, the process can be controlled tightly.
Along with duplicating the process in nanowires between 20 and 100 nanometers in diameter, researchers demonstrated the process using several combinations of materials,
In addition to being able to tune the distance between the lobes on nanowires, Mankin said tests showed they were also able to tune the cross-section of the wires.
As you shrink the spacing down to distances smaller than about 400 nanometers, it creates
What that means is that you could absorb the same amount of infrared light with these nanowires as you could with traditional silicon materials that are 100 times thicker.
if you wanted to use nanowires for photo-detection of green and blue light, youd need two wires,
#Sticky-flare nanotechnology exposes RNA misregulation in living cells (Nanowerk News) RNA is a fundamental ingredient in all known forms of life
A new technology--called"Sticky-flares"--developed by nanomedicine experts at Northwestern University offers the first real-time method to track
"said Chad A. Mirkin, a nanomedicine expert and corresponding author of the study.""We hope that many more researchers will be able to use this platform to increase our understanding of RNA function inside cells."
Sticky-flares are tiny spherical nucleic acid gold nanoparticle conjugates that can enter living cells and target and transfer a fluorescent reporter or"tracking device"to RNA transcripts.
#Degrading BPA with visible light and a new hybrid nanoparticle photocatalyst Over the course of the last half century, BPA has gone from miracle to menace.
The photocatalytic nanomaterial can be used to treat water using visible light. How the New Catalyst Works Their new material breaks down BPA through photocatalytic oxidation, a process in
When light strikes a photocatalyst like titanium dioxide (Tio2) nanoparticles the jolt of energy can kick one of its electrons up to an excited state
In order to turn Tio2 nanoparticles into a better photocatalyst, the researchers made several modifications. First, they added silver to the surface of the nanoparticles,
a common technique to enhance the charge separation. When light strikes Tio2 and excites one of its electrons
Then, they wrapped the Ag/Tio2 nanoparticles in sheets of reduced graphene oxide (RGO), a thin layer of carbon atoms arranged in a honeycomb pattern.
It also reduced the nanoparticles'bandgap, decreasing the amount of energy necessary to activate the photocatalyst.
When the researchers mixed the hybrid nanoparticles with BPA solution under an artificial visible light source
Furthermore, the RGO-Ag-Tio2 nanoparticles outperformed those where RGO or Ag alone were added to the Tio2,
"We strongly feel the developed nano-photocatalyst could be one of the nanomaterials that can sustainably address said problem,
#New study shows how nanoparticles can clean up environmental pollutants Many human-made pollutants in the environment resist degradation through natural processes,
In a new paper published this week in Nature Communications("Nanoparticles with photoinduced precipitation for the extraction of pollutants from water and soil),
"researchers from MIT and the Federal University of Goiás in Brazil demonstrate a novel method for using nanoparticles
Nanoparticles that lose their stability upon irradiation with light have been designed to extract endocrine disruptors, pesticides,
The system exploits the large surface-to-volume ratio of nanoparticles, while the photoinduced precipitation ensures nanomaterials are released not in the environment.
Ferdinand Brandl and Nicolas Bertrand, the two lead authors, are former postdocs in the laboratory of Robert Langer, the David H. Koch Institute Professor at MIT Koch Institute
They initially sought to develop nanoparticles that could be used to deliver drugs to cancer cells. Brandl had synthesized previously polymers that could be cleaved apart by exposure to UV LIGHT.
Nanoparticles made from these polymers have a hydrophobic core and a hydrophilic shell. Due to molecular-scale forces
in a solution hydrophobic pollutant molecules move toward the hydrophobic nanoparticles, and adsorb onto their surface,
If left alone, these nanomaterials would remain suspended and dispersed evenly in water. But when exposed to UV LIGHT,
The fundamental breakthrough, according to the researchers, was confirming that small molecules do indeed adsorb passively onto the surface of nanoparticles. o the best of our knowledge,
it is the first time that the interactions of small molecules with preformed nanoparticles can be measured directly,
we showed in a system that the adsorption of small molecules on the surface of the nanoparticles can be used for extraction of any kind,
as another example of a persistent pollutant that could potentially be remediated using these nanomaterials. nd for analytical applications where you don need as much volume to purify or concentrate,
The study also suggests the broader potential for adapting nanoscale drug-delivery techniques developed for use in environmental remediation. hat we can apply some of the highly sophisticated,
and an expert in nanoengineering for health care and medical applications. hen you think about field deployment,
The University of Tokyo (concurrently serving as the Director of the Innovation Center of Nanomedicine,
#3d'printouts'at the nanoscale using self-assembling DNA structures A novel way of making 3d nanostructures from DNA is described in a study published in the renowned journal Nature("DNA rendering of polyhedral meshes
at the nanoscale"."The study was led by researchers at Karolinska Institutet who collaborated with a group at Finland's Aalto University.
which opens the way for completely new biological applications of DNA NANOTECHNOLOGY. The design process is automated also highly,
which enables the creation of synthetic DNA NANOSTRUCTURES of remarkable complexity. Bjrn Hgberg and Erik Benson The team behind the study likens the new approach to a 3d printer for nanoscale structures.
The user draws the desired structure in the form of a polygon object, in 3d software normally used for computer-aided design or animation.
One of the big advantages of building nanostructures out of DNA is that the bases bind to each other through base-paring in a predictable fashion.
This new method makes it very easy to design DNA NANOSTRUCTURES and gives more design freedom,
we print it in DNA at the nanoscale. Using this technique, the team has built a ball, spiral, rod and bottle-shaped structure,
physiological salt concentrations that are more suitable for biological applications of DNA NANOSTRUCTURES, explains Dr Hgberg.
Advanced computing methods are likely to be a key enabler in the scaling of DNA NANOTECHNOLOGY from fundamental studies towards groundbreaking applications,
DNA NANOSTRUCTURES have also been used to make targeted capsules able to deliver cancer drugs direct to tumour cells,
"said Anand Bhattacharya, a physicist in Argonne's Materials science Division and the Center for Nanoscale Materials (a DOE Office of Science user facility),
TEM Nanocube A nanoscale view of the new superfast fluorescent system using a transmission electron microscope.
The silver cube is just 75-nanometers wide. The quantum dots (red) are sandwiched between the silver cube and a thin gold foil.
When a laser shines on the surface of a silver cube just 75 nanometers wide,
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 dots--spheres of semiconducting material just six nanometers wide--that 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."
"The group is now working to use the plasmonic structure to create a single photon source--a necessity for extremely secure quantum communications--by sandwiching a single quantum dot in the gap between the silver nanocube and gold foil.
including popular lab-on-a-chip devices. Capillary action draws water and other liquids into confined spaces such as tubes, straws, wicks and paper towels,
"This insight has implications for optimal design of microfluidic and lab-on-a-chip devices based on stimuli-responsive smart polymers
consisting of a gold layer on glass that is only 150 nanometers thick and an organic material
#Making polymer nanostructures from a greenhouse gas (Nanowerk News) A future where power plants feed their carbon dioxide directly into an adjacent production facility instead of spewing it up a chimney
In the journal Angewandte Chemie("Construction of Versatile and Functional Nanostructures Derived from CO2-based Polycarbonates),
and can aggregate into nanoparticles or micelles. Versatile nanostructures made from CO2 based polycarbonates. Wiley-VCH) CO2 and epoxides (highly reactive compounds with a three-membered ring made of two carbon atoms
and one oxygen atom) can be polymerized to form polycarbonates in reactions that use special catalysts.
and Vladimir M. Shalaev, scientific director of nanophotonics at Purdue's Birck Nanotechnology Center and a distinguished professor of electrical and computer engineering."
at a nanoscale resolution. The inventors'long-term goal is to make the resource available to the scientific community in the form of a national brain observatory.
"We show how these crystals can be built up into complex structures by attaching particles as nanocrystals, clusters,
They can be small molecules, clusters, droplets, or nanocrystals. All of these particles are unstable and begin to combine with each other and with nearby crystals and other surfaces.
For example, nanocrystals prefer to become oriented along the same direction as the larger crystal before attaching,
#Blown-up brains reveal nanoscale details Microscopes make living cells and tissues appear bigger. But what if we could actually make the things bigger?
In 1873, German physicist Ernst Abbe deduced that conventional optical microscopes cannot distinguish objects that are closer together than about 200 nanometres roughly half the shortest wavelength of visible light.
Professor of Chemistry, an international team of researchers has developed a method of fabricating nanoscale electronic scaffolds that can be injected via syringe.
The research is described in a June 8 paper in Nature Nanotechnology. Contributors to the work include Jia Liu, Tian-Ming Fu, Zengguang Cheng, Guosong Hong, Tao Zhou, Lihua Jin, Madhavi Duvvuri, Zhe Jiang, Peter
researchers lay out a mesh of nanowires sandwiched in layers of organic polymer. The first layer is dissolved then, leaving the flexible mesh,
However, scientists at the Swedish Medical Nanoscience Centre (SMNC) at Karolinska Institutet Department of Neuroscience in collaboration with colleagues at Linköping University, have created now an organic bioelectronic device that is capable of receiving chemical signals,
An oscilloscope placed on the skin alongside the laser senses these nanoscale bubbles when they start popping,
#Infrared light speeds up healing by turbocharging our cells A near infrared laser beam makes it easier for a nanoscale probe to pass through water (Image:
which has a wavelength of 670 nanometres, was reported first 40 years ago. The light causes mitochondria, the cell's powerhouses, to produce more ATP, a compound that provides the cell's energy.
#Development of Single-Molecule Diode Revolutionizes Nanotechnology A paper published on May 25 in Nature Nanotechnology titled ingle-Molecule Diodes with High On-Off Ratios through Environmental Controlreports the first ever attempt for the development of single
which would revolutionize nanoscale devices. Venkataraman proudly stated that the new device represents the ultimate in functional miniaturisation that can be achieved for an electronic device.
He added that constructing a device where the active elements are only a single molecule has long been a tantalizing dream in nanoscience.
This simple new technique can be applied easily to all nanoscale devices of all types, including those that are made with graphene electrodes a
The computer working involves using droplets of water soaked with magnetic nanoparticles, the computer then uses electromagnetic field to pump the droplets around gates to perform logical operations.
For more information, visit www1. lehigh. edu. Harsh Environments No Match for New Fiber Sensor Nanofiber Fabrication Boosts Quantum computing Sulfur Copolymers Boost IR Optics
The research was published in Nature Nanotechnology (doi: 10.1038/nnano. 2015.118. For more information, visit engineering. columbia. edu. Corning to Acquire Fiber optics Business from Samsung Camera Powered by the Light It Captures Microscope Takes 3-D Images From Inside Moving Subjects Technique
New Digital Conference Explores Biophotonics Imaging Fluorescent, Magnetic nanoparticles Aid Bioimaging System Combines Optical Microscopy, MRI Bioimaging Technique Isolates Moving Tissu i
This technology promises to take the future of data storage down to nanometers in coming years,
but if you want to work in nanotechnology it is a very different environment, Lutz said. ur idea is that the chemistry can provide something that's easier to synthesize and cheaper than DNA. a
and diamond nanoparticles are also incredibly slippery, which can be useful if you want to reduce friction in a moving machine.
When the diamond nanoparticles came in contact with the thin sheets of graphene (carbon that's only an atom thick) the graphene rolled up around the diamond nanoparticles,
but researchers hope that they can expand the property to other materials in the future. he knowledge gained from this study will be crucial in finding ways to reduce friction in everything from engines or turbines to computer hard disks and microelectromechanical systems,"nanoscientist Ani Sumant,
The nanoscale world is not slippery when wet; instead, water actually increases friction instead of decreasing it
When they tested one conductive gel with the nanotubes and one without, they were able to create a 3d electrical circuit.
By filling a metallic waffle-like nanostructure with liquid crystal, and sandwiching it between layers of plastic,
or absorbed by the nanostructure. The team at the University of Central Florida created a 1mm-sized"Afghan Girl"image
The laser is modulated by a synthetic nanosheet, a multi-segmented, layered material that can emit in red, green,
The wavelength spans 191 nanometers, which the study claims is reported the largest for a laser of this kind.
Recently published in leading micro/nanoscience journal Small the research was supported by the Australian Research Council.
such as interference, manifest in the conductance properties of molecular junctions. onstructing a device where the active elements are only a single molecule has long been a tantalizing dream in nanoscience,
Their results, reported in the journal Nature Nanotechnology, achieved rectification ratios as high as 250: 50 times higher than earlier designs.
it can be applied to all nanodevices of all types, including those that are made with graphene electrodes
#Gold Nano-Spirals Could Protect Against Identity Theft Most other investigators who have studied the remarkable properties of microscopic spirals have done so by arranging discrete nanoparticles in a spiral pattern:
The next steps for Méndez and her team will be modifying the commercial screen-printed electrodes with nanoparticles to make the sensors respond more clearly,
MOF thin films of a few hundred nanometers in thickness can be used for flexible solar cells or for the coating of clothing material or deformable components.
"What's different about black silicon solar cells is that their surfaces are covered in tiny, nanoscale ridges,
and added a thin film to their nanostructures, as well as a thick coating to the back of the cells,
Publishing in Nature Nanotechnology, the researchers report that their resulting cells are the most efficient black silicon solar cells to date, capable of turning 22.1 percent of available light into electricity."
They then dissolved this nanocellulose and freeze-dried it, so that the moisture evaporates without the material ever going through a liquid state.
the team carefully engineered a 3d supercapacitor with carbon nanotube electrodes, and a hybrid battery. Both of them were fully functional even at 75 percent compression,
#Physicists have observed virtually frictionless motion at the nanoscale For the first time, researchers in the US have made friction almost completely vanish between two surfaces at the nanoscale.
The discovery paves the way for engineering surfaces that can slide past each other with virtually no resistance,
for the first time on the atomic scale, we can see this transition from friction to superlubricity. o do this, the team simulated friction at the nanoscale by engineering two special surfaces:
but although it was easy enough to work out how to control water droplets-by infusing them with magnetic nanoparticles
a group of international researchers led by Professor Charles Lieber of Harvard university have developed a method for injecting nanoscale electronic scaffolds into animal bodies.
His work has just been published in Nature Nanotechnology. Once injected, the miniature scaffolding is able to unfurl itself
Lab-on-a-chip devices are already being used around the world to help provide on-the-spot diagnoses for diseases such as HIV and Ebola,
but by tweaking his the lab-on-a-chip technology, he predicts hel be able to do the same thing for a substantially reduced cost.
Even better, theye also been able to show that the therapeutic cells their lab-on-a-chip creates are highly viable
And in the meantime, find out more about the technique behind Pawell lab-on-a-chip device in this UNSW video from last year:
#Here's how to make carbon nanoparticles with honey and a microwave Carbon nanoparticles can be incredibly useful in the treatment of many types of disease,
as they can evade our natural immune defences and deliver medicine to wherever it's most needed in the body.
but so far creating these nanoparticles has been a long and expensive process. Now researchers at the University of Illinois in the US have found a much easier way to create a certain type of nanoparticle:
using a process that involves plain old honey and a microwave. The resulting particles are less than 8 nanometres thick (a human hair is around 80,000-100,000 nanometres)
so your body's immune system won't try and interfere with them as they deliver their medicine."
but that is nanoparticles with high luminescence. This is one of the simplest systems that we can think of.
the microwave-produced nanoparticles are effective in delivering the drugs where they're needed, and vibrational spectroscopic techniques were used to monitor how the polymers gradually released their payload.
Different polymer coatings were tested too as the team works towards getting these'homemade'carbon nanoparticles ready for clinical use."
All this power is made possible by transistors that are just 7 nanometres in size (7 billionths of a metre),
the secret to these new prototype solar cells are gallium phosphide nanowires, which can split water into its hydrogen
So the researchers tried producing a grid of tiny gallium phosphide nanowires measuring 90 nanometres thick and 500 nanometers long,
"For the nanowires we needed 10,000 less precious Gap material than in cells with a flat surface.
with the new crystals now able to work in cells that are double in thickness on the previous limit of 200 nanometers."
#Carbon nanotube finding could lead to flexible electronics with longer battery life Led by materials science Associate professor Michael Arnold
and Professor Padma Gopalan the team has reported the highest-performing carbon nanotube transistors ever demonstrated. In addition to paving the way for improved consumer electronics this technology could also have specific uses in industrial and military applications.
In a paper published recently in the journal ACS Nano Arnold Gopalan and their students reported transistors with an on-off ratio that's 1000 times better and a conductance that's 100 times better than previous state-of-the-art carbon nanotube transistors.
which are crucial because metallic nanotube impurities act like copper wires and short the device. Researchers have struggled also to control the placement and alignment of nanotubes.
Until now these two challenges have limited the development of high-performance carbon nanotube transistors. Building on more than two decades of carbon nanotube research in the field the UW-Madison team drew on cutting-edge technologies that use polymers to selectively sort out the semiconducting nanotubes achieving a solution of ultra-high-purity semiconducting carbon nanotubes.
Previous techniques to align the nanotubes resulted in less than-desirable packing density or how close the nanotubes are to one another
when they are assembled in a film. However the UW-Madison researchers pioneered a new technique called floating evaporative self-assembly or FESA
which they described earlier in 2014 in the ACS journal Langmuir. In that technique researchers exploited a self-assembly phenomenon triggered by rapidly evaporating a carbon nanotube solution.
The team's most recent advance also brings the field closer to realizing carbon nanotube transistors as a feasible replacement for silicon transistors in computer chips
and in high-frequency communication devices which are rapidly approaching their physical scaling and performance limits.
This is not an incremental improvement in performance Arnold says. With these results we've really made a leap in carbon nanotube transistors.
Our carbon nanotube transistors are an order of magnitude better in conductance than the best thin film transistor technologies currently being used commercially
while still switching on and off like a transistor is supposed to function. The researchers have patented their technology through the Wisconsin Alumni Research Foundation
"Ripples, wrinkles and sub-10-nanometer pores in the surface and atomic-level imperfections give LIG its ability to store a lot of energy.
#Two-dimensional metamaterial surface manipulates light A single layer of metallic nanostructures has been designed, fabricated and tested by a team of Penn State electrical engineers that can provide exceptional capabilities for manipulating light.
which consists of a periodic array of strongly coupled nanorod resonators, could improve systems that perform optical characterization in scientific devices, such as ellipsometers;
It was fabricated in the Penn State Nanofabrication Laboratory by doctoral student Lan Lin and characterized by doctoral student Ding Ma.
"This work was supported by the National Science Foundation through Penn State's Center for Nanoscale Science e
By using an electrical pulse to create a temporary nanopore in a cell membrane, researchers can deliver chemicals, drugs,
#New superconducting hybrid crystals A new type of'nanowire'crystals that fuses semiconducting and metallic materials on the atomic scale could lay the foundation for future semiconducting electronics.
"Our new material was born as a hybrid between a semiconducting nanowire and its electronic contact.
Thus we have invented a way to make a perfect transition between the nanowire and a superconductor.
ever since research into nanowire crystals has existed at the Nanoscience Center at the Niels Bohr Institute.
Nanowire and contact formed at the same time Nanowires are extremely thin nanocrystal threads used in the development of new electronic components
Part of the challenge of working with nanowires is creating a good transition between these nanowires and an electrical contact to the outside world.
but from all over the world, 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,
You could say that it is the ultimate limit to how perfect a transition one could imagine between a nanowire crystal and a contact.
Of course this opens many opportunities to make new types of electronic components on the nanoscale and in particular,
Chips with billions of nanowire hybrids In their publication in Nature Materials, the research group has demonstrated this perfect contact
and its properties and has shown also that they can make a chip with billions of identical semiconductor-metal nanowire hybrids."
and that is why the research into nanowires is interesting for the largest electronics companies, "says Thomas Sand Jespersen.
The project was a collaboration between Englund's group and the Quantum Nanostructures and Nanofabrication Group
Transforming planar materials into 3-D microarchitectures Researchers at the University of Illinois at Urbana-Champaign have developed a unique process for geometrically transforming two dimensional (2d) micro/nanostructures into extended 3d layouts
Complex, 3d micro/nanostructures are ubiquitous in biology, where they provide essential functions in even the most basic forms of life.
and Rogers, co-authors of the paper,"Assembly of micro/nanomaterials into complex, three-dimensional architectures by compressive buckling,
#Nanowire clothing could keep people warm without heating everything else To stay warm when temperatures drop outside,
But scientists have developed now a novel nanowire coating for clothes that can both generate heat
the special nanowire cloth trapped body heat far more effectively. Because the coatings are made out of conductive materials,
To overcome this obstacle the team used a fast-responding photorefractive crystal that is sensitive to light at the 790-nanometer wavelength making it suitable to focus light deep into biological tissue.
Rather than develop a new instrument we've created a nanoscale tool made from strands of DNA that can detect
and control mechanical vibrations of microscale and nanoscale devices--a field called optomechanics. In resonant microcavities these miniscule forces can be enhanced by many orders of magnitude.
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