The technique provides a new approach to modulation that could be useful in all kinds of silicon-based nanoscale devices,
Titanium dioxide nanoparticles doped with elements such as strontium and chrome were used in the production of the coating.
The coating of nanoparticles contains titanium dioxide and other spherical nanoparticles in average size of 60 nm.
#The world's fastest nanoscale photonics switch: Russian scientists developed the world's fastest nanoscale photonics switch This work belongs to the field of photonics-an optics discipline
which appeared in the 1960-s, simultaneously with the invention of lasers. Photonics has the same goals as electronics does,
The typical scale of eletronic transistors--the basis of contemporary electronic devices--is less than 100 nanometers
Nanostructures that are able to compete with the electronic structures--for example, plasmonic nanoparticles--are characterized by low efficiency and significant losses.
Therefore, coming up with a compact photonic switch was a very challenging task. Three years ago several groups of researchers simultaneously discovered an important effect:
they found out that silicon nanoparticles are exhibit strong resonances in the visible spectrum-the so-called magnetic dipole resonances.
This type of resonance is characterized by strong localization of light waves on subwavelength scales, inside the nanoparticles.
Nanoparticles were fabricated in the Australian National University by e-beam lithography followed by plasma-phase etching.
The interaction becomes possible due to the magnetic resonance of the silicon nanostructures. If the pulses arrive at the nanostructure simultaneously,
one of them interacts with the other and dampers it due to the effect of two-photon absorption.
and the second pulse goes through the nanostructure without changing.""We were able to develop a structure with the undesirable free-carrier effects are suppressed,
In the nearest future, we are going to test such nanoparticles in integrated circuits
#Magnetic Nanosorbents Eliminate Fluoride from Water Researchers from Tehran University of Medical sciences used low-cost and available raw materials for the laboratorial production of nanosorbents with high efficiency in elimination of fluoride from contaminated water.
magnetic properties have been created in the structure of the sorbent by using iron oxide nanoparticles. The synthesized magnetic composite is separated from the solution phase in the presence of a magnetic field in a short time through this method.
Now scientists report in the journal ACS Nano("Hierarchical Porous Nitrogen-Doped Carbon Nanosheets Derived from Silk for Ultrahigh-Capacity Battery Anodes and Supercapacitors")the development of a new,
The researchers found a way to process natural silk to create carbon-based nanosheets that could potentially be used in energy storage devices.
The Berkeley researchers were able to overcome both these hurdles by forming their grating bars using a semiconductor layer of silicon approximately 120 nanometers thick.
Their initial design, subjected to a change in period of a mere 25 nanometers, created brilliant colors that could be shifted from green to yellow,
orange, and red-across a 39-nanometer range of wavelengths. Future designs, the researchers believe,
#Scientists develop atomic force microscopy for imaging nanoscale dynamics of neurons While progress has been made over the past decades in the pursuit to optimize atomic force microscopy (AFM) for imaging living cells,
In their March publication in Scientific Reports("Long-tip high-speed atomic force microscopy for nanometer scale imaging in live cells),
"We've now demonstrated that our new AFM can directly visualize nanometer scale morphological changes in living cells,
According to Dr. Yasuda, the successful observations of structural dynamics in live neurons present the possibility of visualizing the morphology of synapses at nanometer resolution in real time in the near future.
#Nanotechnology may double radio frequency data capacity A team of Columbia Engineering researchers has invented a technology--full-duplex radio integrated circuits (ICS)--that can be implemented in nanoscale CMOS to enable simultaneous transmission and reception
Cosmic (Columbia High-speed and Mm-wave IC) Lab full-duplex transceiver IC that can be implemented in nanoscale CMOS to enable simultaneous transmission and reception at the same frequency in a wireless radio.
but no one has yet been able to build tiny nanoscale ICS with this capability.""Our work is the first to demonstrate an IC that can receive
especially when performed in a tiny nanoscale IC, and we have found a way to solve that challenge."
#Researchers probe nanoscale properties and mechanisms of lubricant films The pistons in your car engine rub up against their cylinder walls thousands of times a minute;
whose research focuses on nanoscale measurements of friction and lubrication. The team conducted research to probe nanoscale properties and mechanisms of lubricant films and ultimately uncovered the molecular mechanisms behind a common anti-wear additive.
Motor oil contains chemical additives that extend how long engines can run without failure, but, despite decades of ubiquity, how such additives actually work to prevent this damage have remained a mystery.
so we have to use the knowledge we have from nanotechnology and apply it to understand what's going on there."
but, zoomed into the nanometer scale, they might look more like mountain ranges. Absent a buffering layer of a protective film, those peaks,
An atomic force microscope uses a nanoscale tip much like a record needle. Mounted on a flexible arm,
"Such a discovery would not have been possible without the team's nanoscale approach. Without being able to control the stress
"Nanotechnology's not just for doing cool science, "Gosvami said.""You can bring your industrial products into the lab
#Spherical nucleic acids set stage for new paradigm in nanomedicine drug development A research team led by Northwestern University nanomedicine expert Chad A. Mirkin
The spherical arrangement of approximately 100 DNA strands attached to a benign nanoparticle core made of lipid
The single stranded-dna DNA on the nanoparticle core can be positioned ideally and oriented to specifically and fully interact with the targeted toll-like receptors.
#Nanospheres cooled with light to explore the limits of quantum physics A team of scientists at UCL led by Peter Barker
The team successfully suspended glass particles 400 nanometres across in a vacuum using an electric field,
The study is published today in the journal Physical Review Letters("Cavity cooling a single charged nanoparticle".
"Nanospheres were cooled with light to explore the limits of quantum physics. Image: James Millen et al. Quantum phenomena are strange and unfamiliar.
"The team are still a few degrees short of the temperature required to create quantum behaviour in the glass nanospheres,
And once sufficiently cooled, the team believes the nanospheres should behave according to quantum principles. Once successfully implemented, the technology could allow for highly accurate motion sensors that could detect the slightest tremor,
Observing quantum effects in large and heavy objects like these nanoparticles would also shed light on the role of gravity in quantum physics s
#A nanomaterial to heal broken bones A new material that triggers stem cells to begin forming bone could enable a more effective treatment for hard-to-heal bone breaks
The ultrathin nanoparticles are embedded in a collagen-based hydrogel a biodegradable gel used in several biomedical applications because of its compatibility with the body.
The dynamic and bioactive nanocomposite gels we have developed show strong promise in bone tissue engineering applications,
As part of future research, Gaharwar plans further investigation into the process by which the nanoplatelets trigger cell differentiation.
would allow the injury site to receive blood flow as part of the enhanced healing process initiated by the nanoparticles.
In the journal ACS Nano("Nanopatterned Textile-Based Wearable Triboelectric Nanogenerator"),scientists report the first durable,
For a possible solution, Kim's team turned to the emerging technology of"triboelectric nanogenerators,
The researchers created a novel TNG fabric out of a silvery textile coated with nanorods and a silicon-based organic material.
#Putting batteries on stage spotlights performance at the nanoscale Used in everything from electric vehicles to laptop computers,
To see what happens on the nanoscale, scientists at DOE's Joint Center for Energy storage Research (JCESR) designed
Using this stage inside a state-of-the-art aberration-corrected transmission electron microscope they can take nanoscale-resolution pictures of lithium ions as they are deposited on or dissolve off of an electrode while the battery runs("Observation and Quantification of Nanoscale Processes in Lithium batteries
scientists can quantify, at the nanoscale, the amount of lithium that ends up irreversibly deposited after each charge/discharge cycle.
The thickness of the silicon films ranges from 20 to 200 nanometers for creating different colors.
For reference, 100 nanometers is about 1/1000 of the thickness of a single sheet of paper.
One nanometer is about two atomic layers of silicon. The silicon color coating process can be applied on almost any material surface.
#Medical nanoparticles for the local treatment of lung cancer Nanoparticles can function as carriers for medicines to combat lung cancer:
Working in a joint project at the NIM (Nanosystems Initiative Munich) Excellence Cluster, scientists from the Helmholtz Zentrum Mnchen (HMGU) and the Ludwig-Maximilians-Universitt (LMU) in Munich have developed nanocarriers that site-selectively release medicines/drugs at the tumor site in human and mouse lungs.
In the journal, ACS Nano("Protease-Mediated Release of Chemotherapeutics from Mesoporous Silica Nanoparticles to ex Vivo Human and Mouse Lung Tumors"),the scientists reported that this approach led to a significant increase
in the effectiveness of current cancer medicines in lung tumour tissue. Tumor tissue in the lung.
Sabine van Rijt, CPC/ilbd, Helmholtz Zentrum Mnchen) Nanoparticles are extremely small particles that can be modified for a variety of uses in the medical field.
For example, nanoparticles can be engineered to be able to transport medicines specifically to the disease site while not interfering with healthy body parts.
Selective drug transport verified in human tissue for the first time The Munich scientists have developed nanocarriers that only release the carried drugs in lung tumour areas.
were able to show nanoparticles'selective drug release to human lung tumour tissue for the first time. Tumour specific proteins were used to release drugs from the nanocarriers Tumour tissue in the lung contains high concentrations of certain proteases,
which are enzymes that break down and cut specific proteins. The scientists took advantage of this by modifying the nanocarriers with a protective layer that only these proteases can break down,
a process that then releases the drug. Protease concentrations in the healthy lung tissue are too low to cleave this protective layer
and so the medicines stay protected in the nanocarrier.""Using these nanocarriers we can very selectively release a drug such as a chemotherapeutic agent specifically at the lung tumour,"reports research group leader Meiners."
"We observed that the drug's effectiveness in the tumour tissue was 10 to 25 times greater compared to
"Further studies will now be directed to examine the safety of the nanocarriers in vivo and verify the clinical efficacy in an advanced lung tumour mouse model l
Nanocomposite Technology, Interface Materials, and Bio Interfaces s
#Squeeze to remove heat: Elastocaloric materials enable more efficient, 'green'cooling Move over, vapor compression cooling technology.
#Nanotechnology makes possible a robotic germ (Nanowerk News) As nanotechnology makes possible a world of machines too tiny to see,
The results are published in the March 23 advance online issue of Nature Nanotechnology("Water Desalination Using Nanoporous Single-layer graphene"."
Then the team exposed the graphene to an oxygen plasma that knocked carbon atoms out of the graphene's nanoscale chicken wire lattice to create pores.
They determined the optimum pore size for effective desalination was 0. 5 to 1 nanometers,
They also found the optimal density of pores for desalination was one pore for every 100 square nanometers."
#Chemists make new silicon-based nanomaterials In a paper published in the journal Nano Letters("A Silicon-Based Two-dimensional Chalcogenide:
Growth of Si2te3 Nanoribbons and Nanoplates"),the researchers describe methods for making nanoribbons and nanoplates from a compound called silicon telluride.
Chemists from Brown University have come up with a way to make new nanomaterials from a silicon-based compound.
and we've shown a totally new method for using it to make layered, two-dimensional nanomaterials."
the researchers made nanoribbons that are about 50 to 1, 000 nanometers in width and about 10 microns long.
#New study shows bacteria can use magnetic nanoparticles to create a'natural battery'(Nanowerk News) New research shows bacteria can use tiny magnetic particles to effectively create a'natural battery.'
#Novel nanoparticle therapy promotes wound healing (w/video)( Nanowerk News) An experimental therapy developed by researchers at Albert Einstein College of Medicine of Yeshiva University cut in half the time it takes to heal
"e envision that our nanoparticle therapy could be used to speed the healing of all sorts of wounds,
and then put the drug in tiny gel capsules called nanoparticles and applied the nanoparticles to wounds on mice.
The treated wounds healed much faster than untreated wounds. FL2 belongs to the fidgetin family of enzymes,
and study co-leader Adam Friedman, M d.,director of dermatologic research at Einstein and Montefiore, who together had developed nanoparticles that protect molecules such as sirna from being degraded as they ferry the molecules to their intended targets.
The nanoparticles with their sirna cargoes were tested then by topically applying them to mice with either skin excisions or burns.
"Aydin and his team tackled this problem by combining nanotechnology, materials science, and plasmonics, the study of the interactions between light and metal.
and fabricated a series of silver nanodiscs and arranged them in a periodic fashion on top of a sheet of Mos2.
Not only did they find that the nanodiscs enhanced light emission, but they determined the specific diameter of the most successful disc,
which is 130 nanometers. Silver nanodiscs on monolayer molybdenum disulfide.""We have known that these plasmonic nanostructures have the ability to attract
and trap light in a small volume, "said Serkan Butun, a postdoctoral researcher in Aydin's lab."Now we've shown that placing silver nanodiscs over the material results in twelve times more light emission."
"The use of the nanostructures--as opposed to using a continuous film to cover the Mos2--allows the material to retain its flexible nature and natural mechanical properties.
Supported by Northwestern's Materials Research Science and Engineering Center and the Institute for Sustainability and Energy at Northwestern,
the research is described in the March 2015 online issue of Nano Letters("Enhanced Light Emission from Large-Area Monolayer Mos2 Using Plasmonic Nanodisc Arrays").
"Butun is first author of the paper. Sefaatiin Tongay, assistant professor of materials science and engineering at Arizona State university, provided the large-area monolayer Mos2 material used in the study.
The results have now been published in Physical Review Letters("Direct Photonic Coupling of a Semiconductor Quantum dot and a Trapped Ion".
#A quantum sensor for nanoscale electron transport The word defect doesnt usually have a good connotation--often indicating failure.
"JQI Fellow Vladimir Manucharyan and colleagues at Harvard university used NV centers in diamond to sense the properties of magnetic field noise tens of nanometers away from the silver samples.
the team here purposefully creates them approximately 15 nanometers away from the silver layer. At temperatures above absolute zero, the electrons inside of the silver layer (or any conductor) bounce around
thus electrons travel dont travel very far--roughly 10 nanometers or less--before scattering off an obstacle.
These results demonstrate that single NV centers can be used to directly study electron behavior inside of a conductive material on the nanometer length scale.
#Extremely sensitive temperature sensor developed with plant nanobionic materials Humans have been inspired by nature since the beginning of time.
Water is replaced by nanotubes It has been known for decades that plants have the extraordinary ability to register extremely fine temperature differences
When Di Giacomo dried the nanotube-cultivated cells, he discovered a woody, firm material that he calls'cyberwood'.
'In contrast to wood, this material is electrically conductive thanks to the nanotubes, and interestingly the conductivity is temperature-dependent and extremely sensitive,
#Thermal properties of nanowires-Follow the heat A mathematical model of heat flow through miniature wires could help develop thermoelectric devices that efficiently convert heat even their own waste heat into electricity.
Phonons typically move in straight lines in nanowires threads barely a few atoms wide. Previous calculations suggested that if parts of a nanowire contained random arrangements of two different types of atoms,
phonons would be stopped in their tracks. In actual alloy nanowires though, atoms of the same element might cluster together to form short sections composed of the same elements.
Now, Zhun-Yong Ong and Gang Zhang of the A*STAR Institute Of high Performance Computing in Singapore have calculated the effects of such short-range order on the behavior of phonons("Enhancement and reduction of one-dimensional
"Their results suggest that heat conduction in a nanowire does not just depend on the relative concentrations of the alloy atoms and the difference in their masses;
Their model simulated an 88-micrometer-long nanowire containing 160,000 atoms of two different elements.
when the nanowire was ordered more containing clusters of the same elements low-frequency phonons struggled to Move in contrast,
The researchers used their model to study the thermal resistance of a nanowire containing an equal mix of silicon and germanium atoms.
-and high-frequency phonons to heat conduction could also help researchers tune the thermal properties of nanowires in the laboratory.
For instance, the surface roughening of nanowires is known to reduce the thermal conductivity contribution of high-frequency phonons
Now, researchers from the A*STAR Institute of Bioengineering and Nanotechnology have synthesized a much smaller molecule,
For some years, Huaqiang Zeng of the Institute of Bioengineering and Nanotechnology has led a team aiming to produce tubular molecules that could pipe water across membranes.
#Nanoparticles provide novel way to apply drugs to dental plaque Therapeutic agents intended to reduce dental plaque
Their findings have been published in the journal ACS Nano("ph-Activated Nanoparticles for Controlled Topical Delivery of Farnesol To Disrupt Oral Biofilm Virulence".
"Farnesol is released from the nanoparticle carriers into the cavity-causing dental plaque. Graphic by Michael Osadciw/University of Rochester.
referred to as a nanoparticle carrier. They constructed the outer layer out of cationicor positively chargedsegments of the polymers.
the same is true of the nanoparticles and HA. Because teeth are coated with saliva, the researchers werent certain the nanoparticles would adhere.
But not only did the particles stay in place, they were also able to bind with the polymeric matrix
Since the nanoparticles could bind both to saliva-coated teeth and within plaque, Benoit and colleagues used them to carry an antibacterial agent to the targeted sites.
In other words, the nanoparticles release the drug when exposed to cavity-causing eating habitsprecisely when it is needed most to quickly stop acid-producing bacteria.
When the drug was administered without the nanoparticle carriers, there was no effect on the number of cavities and only a very small reduction in their severity.
But when it was delivered by the nanoparticle carriers, both the number and severity of the cavities were reduced.
In 2014, researchers in South korea at IBS Center for Integrated Nanostructure Physics along with Samsung Advanced Institute of technology, the Department of Nano Applied Engineering at Kangwon National University, the Department of energy Science
Their soft nanoparticles stick to the plane where oil and water meet, but do not stick to one another.
effectively acting as a 2-D liquid("Interactions and Stress Relaxation in Monolayers of Soft Nanoparticles at Fluid-Fluid Interfaces".
"The researchers created a 2-D liquid consisting of nanoparticles at the interface between a drop of oil and the surrounding water.
The researchers created a 2-D liquid consisting of nanoparticles at the interface between a drop of oil and the surrounding water.
and potentially lead to applications in fields like nanomanufacturing and catalysis. We understand how particles work in 3-D,
The teams technique for surmounting this problem hinged on decorating their gold nanoparticles with surfactant, or soap-like, ligands.
onl prweb About PI PI is a leading manufacturer of precision motion control equipment, piezo motors, air bearing stages and hexapod parallel-kinematics for semiconductor applications, photonics, bio-nano-technology and medical engineering.
3-D images of nanoscale objects (w/video)( Nanowerk News) To design the next generation of optical devices, ranging from efficient solar panels to LEDS to optical transistors,
engineers will need a 3-dimensional image depicting how light interacts with these objects on the nanoscale.
thousandths the size of a grain of sand, in 3-D and with nanometer scale resolution.
The research is detailed in the current issue of Nature Nanotechnology("Nanoscale optical tomography with cathodoluminescence spectroscopy".
The target object in this proof-of-principle experiment was coated a gold crescent 250 nanometers in diameter several hundred times as thin as a human hair.
which light interacts with this nanometer scale object.""Interpreting a 2-D image, however, can be quite limiting,
This experimental map reveals sources of light emission in the structure with a spatial resolution on the order of 10 nanometers.
"This work could enable a new era of 3d optical imaging with nanometer scale spatial and spectral resolution,
#Multimetal nanoframes improve catalyst performance (Nanowerk News) A team of researchers has synthesized a highly active and durable class of electrocatalysts by exploiting the structural evolution of solid Pt-Ni bimetallic nanocrystals into porous
cage-like structures or nanoframes("Highly Crystalline Multimetallic Nanoframes with Three-dimensional Electrocatalytic Surfaces"."This novel material significantly enhanced catalytic activity for the oxygen reduction reaction--the splitting of an O2 molecule into two oxygen ions--that is critical to fuel cells and potentially other electrochemical applications.
The open structure of the nanoframes addresses some of the major design criteria for advanced nanoscale electrocatalysts, namely, high surface-to-volume ratio, three-dimensional surface accessibility to reactants,
and the University of Wisconsin synthesized a highly active and durable class of electrocatalysts by exploiting the structural evolution of solid Pt-Ni bimetallic nanocrystals into porous cage-like structures or nanoframes.
The material was synthesized by exploiting the structural evolution of platinum-nickel (Pt-Ni) bimetallic nanocrystals into cage-like structures with a self-assembled Pt skin structure on the interior and exterior surfaces.
crystalline Ptni3 nanoparticles, are transformed in solution and at mild temperatures into Pt3ni nanoframes with surfaces that have three-dimensional molecular accessibility.
The Pt-rich edges of the starting Ptni3 nanoparticles are maintained in the final Pt3ni nanoframes.
Both the interior and exterior surfaces of this open framework structure are composed of a Pt-rich skin structure that exhibits enhanced oxygen reduction reaction activity.
The Pt3ni nanoframe catalysts achieved a more than 36-fold and 22-fold enhancement in two different measures of catalytic activity (mass and specific activities, respectively) for the oxygen reduction reaction in comparison to state-of-the-art
The HER activity for highly crystalline Pt3nit-skin nanoframe surface was enhanced by almost one order of magnitude relative to Pt/C. Utilizing the spontaneous structural evolution of a bimetallic nanoparticle from solid polyhedra to hollow nanoframes with controlled size, structure,
#Scientists use nanotechnology to visualize potential brain cancer treatments in real time (Nanowerk News) Virginia Tech Carilion Research Institute scientists have developed new imaging techniques to watch dangerous brain tumor
Published in NANO Letters("Real-time Visualization of Nanoparticles Interacting with Glioblastoma Stem Cells), "the study was led by Zhi Sheng and Deborah Kelly, both assistant professors at the institute,
and describes how the research team used nanotechnology to watch tumor stem cells respond to therapy. ee never been able to directly observe the actions of potential cancer treatments this way before,
the scientists blasted them with gold nanorods similar to what is used in some cancer treatments and watched the process in cell cultures using in situ transmission electron microscopy.
as published in Nature Nanotechnology in 2014. It has demonstrated now a key step that had remained elusive since 1998."
Nagoya University and the JST-ERATO Itami Molecular Nanocarbon Project have developed a bulky iridium catalyst that selectively directs a boron moiety to the opposite side of mono-substituted benzene derivatives.
The study, entitled"Generation of photovoltage in graphene on a femtosecond timescale through efficient carrier heating",has recently been published in Nature Nanotechnology("Generation of photovoltage in graphene on a femtosecond timescale through efficient carrier heating".
#Lanthanide-organic framework nanothermometers prepared by spray-drying A work in Advanced Functional Materials shows how spray-drying prepared MOF nanoparticles containing lanthanide metals may be used as nanothermometers operative over a wide range of temperatures
and participated by Ramón y Cajal Researcher Dr Inhar Imaz and ICREA Research Prof Daniel Maspoch from the ICN2 Supramolecular Nanochemistry & Materials Group.
Ramón y Cajal Researcher Dr. Inhar Imaz and ICREA Research Prof Daniel Maspoch from the Supramolecular Nanochemistry & Materials Group have participated in the research
The article also shows that spray-drying prepared MOF nanoparticles may be used as ratiometric luminescent nanothermometers operative over a wide range of temperatures, in particular, in the cryogenic range.
Prof Maspoch and Dr Imaz have contributed in the synthesis of the MOF nanoparticles of Tb (III) and Eu (III),
#Nature-inspired nanotechnology mesh captures oil but lets water through (Nanowerk News) The unassuming piece of stainless steel mesh in a lab at The Ohio State university doesn't look like a very big deal,
The mesh coating is among a suite of nature-inspired nanotechnologies under development at Ohio State
superoleophobic coatings prepared by layer-by-layer technique for anti-smudge and oil-water separation"and"Nanomechanical behavior of Mos2 and WS2 multi-walled nanotubes and Carbon nanohorns").
They sprayed a fine dusting of silica nanoparticles onto the stainless steel mesh to create a randomly bumpy surface
Because the coating is only a few hundred nanometers (billionths of a meter) thick, it is mostly undetectable.
"He explained that certain combinations of layers yield nanoparticles that bind to oil instead of repelling it.
The shape of the nanostructures plays a role, as well. In another project, research assistant Dave Maharaj is investigating
what happens when a surface is made of nanotubes. Rather than silica, he experiments with molybdenum disulfide nanotubes,
which mix well with oil. The nanotubes are approximately a thousand times smaller than a human hair.
Maharaj measured the friction on the surface of the nanotubes and compressed them to test how they would hold up under pressure."
"There are natural defects in the structure of the nanotubes, "he said.""And under high loads, the defects cause the layers of the tubes to peel apart
and create a slippery surface, which greatly reduces friction.""Bhushan envisions that the molybdenum compound's compatibility with oil,
In addition, for micro-and nanoscale devices, commercial oils may be too sticky to allow for their efficient operation.
Here, he suspects that the molybdenum nanotubes alone could be used to reduce friction. This work began more than 10 years ago,
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