New research by the Nanoparticles By design Unit at the Okinawa Institute of Science and Technology Graduate University (OIST), in collaboration with the Materials Center Leoben Austria and the Austrian Centre for Electron microscopy and Nanoanalysis has developed an efficient
The researchers used a copper oxide nanowire decorated with palladium nanoparticles to detect carbon monoxide a common industrial pollutant.
They found that copper oxide nanowires decorated with palladium nanoparticles show a significantly greater increase in electrical resistance in the presence of carbon monoxide than the same type of nanowires without the nanoparticles.
The OIST Nanoparticles By design Unit used a sophisticated technique that allowed them to first sift nanoparticles according to size,
then deliver and deposit the palladium nanoparticles onto the surface of the nanowires in an evenly distributed manner.
This even dispersion of size selected nanoparticles and the resulting nanoparticles-nanowire interactions are crucial to get an enhanced electrical response.
The OIST nanoparticle deposition system can be tailored to deposit multiple types of nanoparticles at the same time, segregated on distinct areas of the wafer where the nanowire sits.
with each device utilizing a different type of nanoparticle. Compared to other options being explored in gas sensing
However, different nanowire-nanoparticle material configurations are currently being investigated in order to lower the operating temperature of this system."
"I think nanoparticle-decorated nanowires have a huge potential for practical applications as it is possible to incorporate this type of technology into industrial devices,
Mukhles Sowwan at the OIST Nanoparticles By design Unit n
#Flicking the switch on spin-driven devices Compressing magnetically and electrically active crystals in one direction unlocks exotic spintronic switching activityby breaking the symmetry of ultiferroiccrystals using a special compression cell,
creating an electrode made of nanoparticles with a solid shell, and a olkinside that can change size again and again without affecting the shell.
The use of nanoparticles with an aluminum yolk and a titanium dioxide shell has proven to be he high-rate champion among high-capacity anodes
That where the idea of using confined aluminum in the form of a yolk-shell nanoparticle came in.
#New protein nanoparticles allow scientists to track cells and interactions within them Engineers have designed magnetic protein nanoparticles that can be used to track cells
or to monitor interactions within cells. The particles, described today in Nature Communications, are enhanced an version of a naturally occurring, weakly magnetic protein called ferritin. erritin,
which is as close as biology has given us to a naturally magnetic protein nanoparticle, is really not that magnetic.
The new ypermagneticprotein nanoparticles can be produced within cells allowing the cells to be imaged or sorted using magnetic techniques.
prompting them to start producing the protein on their own. ather than actually making a nanoparticle in the lab
resulting in micrometer-per-second nanoparticle transport by harnessing a single plasmonic nanoantenna, which until now has been thought to be said impossible
and contains a small amount of platinum in the form of nanoparticles. This new composite presents some special talents.
The produced aerosol is directed over the heated substrate using a stream of nitrogen gas resulting into a polycrystalline thin film grown on the chalcopyrite substrate over time with embedded nanoparticles of platinum.
thanks to diamond nanocrystals used as temperature sensors Abstract: Precise targeting biological molecules, such as cancer cells,
Using a chemical method to attach gold nanorods to the surface of a diamond nanocrystal, the authors have invented a new biocompatible nanodevice.
while accurately sensing temperature with the nanocrystals. The authors'lab specialises in fabricating bright fluorescent diamond nanocrystals.
The paticularity of these nanocrystals is that they contain a high concentration of punctual colour centre defects.
When exposed to green light, these centres emit a red fluorescent light, useful for sub-cellular imaging applications.
By introducing gold nanoparticles to the nanocrystal, the authors make it possible to convert the incoming laser light into extremely localised heat.
These gold nanoparticles can therefore act as switchable nanoheaters for therapies based on delivering intense and precise heat to cancerous cells,
The novelty of this study is that it shows that it is possible to use diamond nanocrystals as hypersensitive temperature sensors with a high spatial resolution-ranging from 10 to 100 nanometers-to monitor the amount of heat delivered to cancer cells s
#Sandcastles inspire new nanoparticle binding technique"Nanocapillary-mediated magnetic assembly of nanoparticles into ultraflexible filaments and reconfigurable networks"Abstract:
Here, we show that capillarity-mediated binding between magnetic nanoparticles coated with a liquid lipid shell can be used for the assembly of ultraflexible microfilaments and network structures.
These filaments can be regenerated magnetically on mechanical damage, owing to the fluidity of the capillary bridges between nanoparticles and their reversible binding on contact.
Sandcastles inspire new nanoparticle binding technique If you want to form very flexible chains of nanoparticles in liquid
in order to build tiny robots with flexible joints or make magnetically self-healing gels, you need to revert to childhood
researchers from North carolina State university and the University of North carolina-Chapel hill show that magnetic nanoparticles encased in oily liquid shells can bind together in water,
"We then add a magnetic field to arrange the nanoparticle chains and provide directionality, "said Bhuvnesh Bharti,
and makes the bridges fragile, leading to breaking and fragmentation of the nanoparticle chains. Yet the broken nanoparticles chains will reform
if the temperature is raised, the oil liquefies and an external magnetic field is applied to the particles."
Researchers will be able to study samples ranging from engineered nanoparticles and nanostructures to naturally occurring biological polymers, tissues and plant cells.
#Targeted drug delivery with these nanoparticles can make medicines more effective: Nanoparticles wrapped inside human platelet membranes serve as new vehicles for targeted drug delivery The research,
led by nanoengineers at the UC San diego Jacobs School of engineering, was published online Sept. 16 in Nature.""This work addresses a major challenge in the field of nanomedicine:
targeted drug delivery with nanoparticles, "said Liangfang Zhang, a nanoengineering professor at UC San diego and the senior author of the study."
platelet-mimicking nanoparticles can directly provide a much higher dose of medication specifically to diseased areas without saturating the entire body with drugs."
The ins and outs of the platelet copycats On the outside, platelet-mimicking nanoparticles are cloaked with human platelet membranes,
which enable the nanoparticles to circulate throughout the bloodstream without being attacked by the immune system. The platelet membrane coating has another beneficial feature:
and certain pathogens such as MRSA bacteria, allowing the nanoparticles to deliver and release their drug payloads specifically to these sites in the body.
Enclosed within the platelet membranes are made nanoparticle cores of a biodegradable polymer that can be metabolized safely by the body.
The nanoparticles can be packed with many small drug molecules that diffuse out of the polymer core and through the platelet membrane onto their targets.
To make the platelet-membrane-coated nanoparticles, engineers first separated platelets from whole blood samples using a centrifuge.
the platelet membranes were broken up into much smaller pieces and fused to the surface of nanoparticle cores.
The resulting platelet-membrane-coated nanoparticles are approximately 100 nanometers in diameter, which is one thousand times thinner than an average sheet of paper.
This cloaking technology is based on the strategy that Zhang's research group had developed to cloak nanoparticles in red blood cell membranes.
The researchers previously demonstrated that nanoparticles disguised as red blood cells are capable of removing dangerous pore-forming toxins produced by MRSA, poisonous snake bites and bee stings from the bloodstream.
Platelet copycats at work In one part of this study, researchers packed platelet-mimicking nanoparticles with docetaxel,
Researchers observed that the docetaxel-containing nanoparticles selectively collected onto the damaged sites of arteries
platelet-mimicking nanoparticles can also greatly minimize bacterial infections that have entered the bloodstream and spread to various organs in the body.
Researchers injected nanoparticles containing just one-sixth the clinical dose of the antibiotic vancomycin into one of group of mice systemically infected with MRSA bacteria.
"Our platelet-mimicking nanoparticles can increase the therapeutic efficacy of antibiotics because they can focus treatment on the bacteria locally without spreading drugs to healthy tissues
"We hope to develop platelet-mimicking nanoparticles into new treatments for systemic bacterial infections and cardiovascular disease."
The nanosensor consists of plasmonic nanoparticles that are placed at regular distance from each other. Based on the results of the modeling
The role of nanosensor between body surface and the detector is to strengthen the signal and taking samples through plasmonic effects of nanoparticles.
A nanocomposite coating has been produced in this research by combining hydroxyapatite nanoparticles as the base material and diopside ceramic.
and Zhitomirsky, a materials science and engineering professor, demonstrates an improved three-dimensional energy storage device constructed by trapping functional nanoparticles within the walls of a nanocellulose foam.
The type of nanocellulose used is called cellulose nanocrystals and looks like uncooked long-grain rice but with nanometer-dimensions.
such as platinum-copper single atom alloy nanoparticles supported on an alumina substrate, and then tested them under industrial pressure and temperatures."
In addition, the product is able to form hydroxyapatite nanoparticles to create chemical bonds with bone tissue in the body.
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.
plasmonic nanoparticles--are characterized by low efficiency and significant losses. Therefore, coming up with a compact photonic switch was a very challenging task.
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.
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.
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.
The study is published today in the journal Physical Review Letters("Cavity cooling a single charged nanoparticle".
Observing quantum effects in large and heavy objects like these nanoparticles would also shed light on the role of gravity in quantum physics s
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.
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.
#Medical nanoparticles for the local treatment of lung cancer Nanoparticles can function as carriers for medicines to combat lung cancer:
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
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.
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,
#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.
The results have now been published in Physical Review Letters("Direct Photonic Coupling of a Semiconductor Quantum dot and a Trapped Ion".
#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.
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.
The teams technique for surmounting this problem hinged on decorating their gold nanoparticles with surfactant, or soap-like, ligands.
#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
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.
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,
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,
#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
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),
They sprayed a fine dusting of silica nanoparticles onto the stainless steel mesh to create a randomly bumpy surface
"He explained that certain combinations of layers yield nanoparticles that bind to oil instead of repelling it.
#Nanoparticles could make big impact for patients in need of cornea transplant There are about 48,000 corneal transplants done each year in the U s,
Johns Hopkins Medicine researchers may have discovered a way to prevent rejection by using biodegradable nanoparticles that release needed medication into the eye after surgery.
In an animal study being published in the March 10 issue of the Journal of Controlled Release("Corticosteroid-loaded biodegradable nanoparticles for prevention of corneal allograft rejection in rats),
biodegradable nanoparticle loaded with corticosteroids for timed release of medicine. The other three groups received weekly injections of saline, placebo nanoparticles and free dexamethasone sodium phosphate aqueous solution after surgery, respectively.
Treatments were given until the graft was deemed clinically as failed or until the nine-week test period concluded.
For rats that received the nanoparticle loaded with corticosteroids, 65 percent of the treatment remained in the eye
Two weeks after surgery, rats that received the placebo nanoparticle and saline injections had severe swelling, opaque corneas and unwanted growth of new blood vessels, all indicating graft failure.
The only group that showed successful corneal transplant was the group of rats that received the corticosteroid-loaded nanoparticle injections.
The steroid-loaded nanoparticle treatment group showed no signs of corneal transplant rejection. Thats 100 percent efficacy, a very promising finding, says Justin Hanes, Ph d.,director of the Center for Nanomedicine.
while making medicine adherence much easier on patients and their families The nanoparticle loaded with medication could eliminate the need for a patient to remember to take their medicine often multiple doses per hour after a surgery,
Scientists curve nanoparticle sheets into complex forms (Nanowerk News) Scientists have been making nanoparticles for more than two decades in two-dimensional sheets, three-dimensional crystals and random clusters.
But they have never been able to get a sheet of nanoparticles to curve or fold into a complex three-dimensional structure.
This highly magnified image of a folded gold nanoparticle scroll shows that even though researchers can fold the membrane,
the team got membranes of gold nanoparticles coated with organic molecules to curl into tubes when hit with an electron beam.
The scientists coat gold nanoparticles of a few thousand atoms each with an oil-like organic molecule that holds the gold particles together.
But its a very thin membrane made of a single layer of nanoparticles. To their surprise,
so they end up distributing themselves in a nonuniform way across the top and bottom layers of the nanoparticle sheet.
Argonne researchers are able to fold gold nanoparticle membranes in a specific direction using an electron beam
to analyze the surface of the nanoparticles. They discovered that the amount of surface covered by the organic molecules
In principle, scientists could use this method to induce folding in any nanoparticle membrane that has an asymmetrical distribution of surface molecules.
The results were published online in Nature Communications on August 4, 2015("A paclitaxel-loaded recombinant polypeptide nanoparticle outperforms Abraxane in multiple murine cancer models".
forming a water-soluble nanoparticle with the drug hidden in its core. These nanoparticles are highly soluble in blood
and are the perfect size to penetrate and accumulate in tumors where they take advantage of a tumor's acidic environment."
an ECE graduate student and the lead author of the research reported this week in Applied Physics Letters("Polarized quantum dot emission in electrohydrodynamic jet printed photonic crystals),
See explained. f you put the photonic crystal-enhanced quantum dot into a device like a phone or computer,
These microcapsules, in turn, are packed with nanoparticles that can be filled with drugs. Heres how it works:
The drugs leak slowly out of the nanoparticles and are stored in the microcapsules. When the elastic film is stretched,
the microcapsule is recharged by the drugs that continue to leak out of the nanoparticles. This can be used to apply drugs directly to sites on the skin,
colloidal nanoparticles may play a role in digital technologies of the future. Nanoparticles can be displaced rapidly,
require little energy and their small footprint offers large storage capacity all these attributes make them well suited to new data storage applications or high-resolution displays.
These nanoparticles are constantly in motion due to the principle of Brownian motion. Since the particles are charged electrically,
In a new study, she and her colleagues have demonstrated now that it is not only possible to spatially confine nanoparticles,
"Nanoparticles possess properties that are very useful for digital technologies, and each individual particle can now be used to store
The targeted manipulation of individual nanoparticles opens up new options for their application, including in future data storage media
#Quantum dot solar cell exhibits 30-fold concentration We've achieved a luminescent concentration ratio greater than 30 with an optical efficiency of 82-percent for blue photons,
Alivisatos and Ralph Nuzzo of the University of Illinois are the corresponding authors of a paper in ACS Photonics describing this research entitled Quantum dot Luminescent Concentrator Cavity Exhibiting 30-fold Concentration.
We replaced the molecular dyes in previous LSC systems with core/shell nanoparticles composed of cadmium selenide (Cdse) cores
The Cdse/Cds nanoparticles enabled us to decouple absorption from emission energy and volume, which in turn allowed us to balance absorption
and scattering to obtain the optimum nanoparticle, he says. Our use of photonic mirrors that are matched carefully to the narrow bandwidth of our quantum dot lumophores allowed us to achieve waveguide efficiency exceeding the limit imposed by total internal reflection.
In their ACS Photonics paper, the collaborators express confidence that future LSC devices will achieve even higher concentration ratios through improvements to the luminescence quantum yield, waveguide geometry,
The success of this Cdse/Cds nanoparticle-based LSC system led to a partnership between Berkeley Lab, the University of Illinois, Caltech and the National Renewable energy Lab (NREL) on a new solar
acids, solid metal nanoparticles, and large protein molecules or enzymes in human bodies. Ninety percent of industrially important chemicals are made using catalysts.
and have been published in the leading British journal Nature Nanotechnology("Evolution of a Designless Nanoparticle Network into Reconfigurable Boolean logic").
They have used networks of gold nanoparticles for the execution of essential computational tasks. Contrary to conventional electronics, they have moved away from designed circuits.
#Quantum dots light up under strain Semiconductor nanocrystals, or quantum dots, are sized tiny, nanometer particles with the ability to absorb light
Exciting quantum dot applications are also emerging in the fields of green energy, optical sensing, and bio-imaging.
Prospects have become even more appealing after a publication was published in the journal Nature Communications last July("Band structure engineering via piezoelectric fields in strained anisotropic Cdse/Cds nanocrystals".
"Our findings add an important new degree of freedom to the development of quantum dot-based technological devices,
#Nanoparticles could boost effectiveness and reduce side effects of allergy shots Whether triggered by cats, bees, pollen or mites,
researchers have developed nanoparticles that envelop an allergen and deliver it to specific cells. But these carriers degrade too slowly,
made with bioadhesive nanoparticles, that stays on the surface of the skin. Results of the research appear in the Sept. 28 online edition of the journal Nature Materials. e found that
and our nanoparticles are so adhesive that they don even go into hair follicles, which are relatively open.
UV exposed skin vs nanoparticle-treated, UV exposed skin. The merged images from rows two and three of this figure show two images of skin cells showing DNA damage in the form of double-strand breaks in sunscreen-treated, UV
exposed skin vs nanoparticle-treated, UV exposed skin. Girardi, who specializes in skin cancer development and progression, said little research has been done on the ultimate effects of sunblock usage and the generation of ROS, ut obviously,
the researchers developed a nanoparticle with a surface coating rich in aldehyde groups, which stick tenaciously to the outer skin layer.
The nanoparticle hydrophilic layer essentially locks in the active ingredient, a hydrophobic chemical called padimate O. Some sunscreen solutions that use larger particles of inorganic compounds, such as titanium dioxide or zinc oxide,
By using a nanoparticle to encase padimate O an organic chemical used in many commercial sunscreens,
Previously, nanoparticle walkers were only able to walk on precise and programmed one-and two-dimensional paths.
and a cathode based on Fes2 nanocrystals. ACS) Today, lithium-ion batteries are the storage technology of choice for many applications, from electric cars to smartphones.
Using a combination of gold and silver nanoparticles and Raman-active dyes, SERS substrates also can target specific DNA and RNA sequences."
"This work demonstrates the unique capability of micro-to-nanoscale topographies of the crumpled graphene-Au nanoparticles--higher density,
bringing the nanoparticles closer, "explained Juyoung Leem, a graduate student and first author of the study published in Nano Letters("Mechanically Self-Assembled, Three-dimensional Grapheneold Hybrid Nanostructures for Advanced Nanoplasmonic Sensors").
This process enables precise control and optimization of the size and spacing of integrated Au nanoparticles on crumpled graphene for higher SERS enhancement."
"According to Nam, the 3d crumpled graphene-Au nanostructure exhibits at least one order of magnitude higher SERS detection sensitivity than that of conventional, flat graphene-Au nanoparticles.
and the 3d integration of gold nanoparticle/graphene hybrid structures r
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