#Quantum dot technology makes LCD TVS more colorful energy-efficient If LCD TVS start getting much more colorful and energy-efficient in the next few years,
it will probably be thanks to MIT spinout QD Vision, a pioneer of quantum dot television displays.
Quantum dots are light-emitting semiconductor nanocrystals that can be tuned by changing their size, nanometer by nanometer to emit all colors across the visible spectrum.
Last June, Sony used QD Vision product, called Color IQ, in millions of its Bravia riluminostelevisions, marking the first-ever commercial quantum dot display.
filled with quantum dots tuned to red and green, that implemented during the synthesis process. Manufacturers use a blue LED in the backlight,
on implementing quantum dots into electronic devices. In a study funded by MIT Deshpande Center for Technological Innovation, Coe-Sullivan, QD Vision cofounder Jonathan Steckel Phd 6,
and others developed a pioneering technique for producing quantum dot LEDS (QLEDS). To do so, they sandwiched a layer of quantum dots, a few nanometers thick, between two organic thin films.
When electrically charged, the dots illuminated a light bulb 25 times more efficiently than traditional devices.
became a landmark in the quantum dot-devices field. oon venture capitalists were calling Vladimir, asking if we spin a company out,
quantum dot displays. aking a transition like that from lighting to displays tests the nerves of folks involved, from top to bottom,
and last year became the first to market with a quantum dot display. Today, QD Vision remains one of only two quantum dot display companies that have seen their products go to market.
Now, with a sharp rise in commercial use, quantum dot technologies are positioned to penetrate the display industry
Coe-Sullivan says. Along with Color IQ-powered LCD TVS, Amazon released a quantum dot Kindle last year,
and Asus has a quantum dot notebook. nd there nothing in between that quantum dots can address,
he says. In the future, Coe-Sullivan adds, QD Vision may even go back and tackle its first challenge:
and value proposition for quantum dot lighting. n
#Streamlining thin film processing saves time energy Energy storage devices and computer screens may seem worlds apart but they're not.
and the biochar nanoparticles can create an extremely large surface area which can then hold more charge.
#New nanocomposites for aerospace and automotive industries The Center for Research in Advanced Materials (CIMAV) has developed reinforced graphite nanoplatelets seeking to improve the performance of solar cell materials.
These polymer-based nanocomposites are reinforced with graphite nanoplatelets for use in industry. Nanocomposites are formed by two
or more phases in this case by reinforced graphite nanoplatelets. The sectors focused on the use of these nanomaterials are diverse;
nanoplatelets impart new properties to materials; this allows us to move into the automotive construction aerospace textile and electronics sectors
graphite nanoplatelets give added value to the product as they improve its mechanical thermal and electrical properties.
the graphite nanoplatelets s
#Graphene/nanotube hybrid benefits flexible solar cells Rice university scientists have invented a novel cathode that may make cheap, flexible dye-sensitized solar cells practical.
Researchers synthesize platelet-like nanoparticles that can do more than clot blood (Phys. org) Stanching the free flow of blood from an injury remains a holy grail of clinical medicine.
By creating nanoparticles that mimic the shape flexibility and surface biology of the body's own platelets they are able to accelerate natural healing processes
That's where platelet-like nanoparticles (PLNS) come in. These tiny platelet-shaped particles that behave just like their human counterparts can be added to the blood flow to supply
and wound healing in older patients by using nanoparticles that can target where clots are forming without triggering unwanted bleeding.
In other applications bloodborne pathogens and other infectious agents could be minimized with antibiotic-carrying nanoparticles.
U s. Patent 8841272 Double stranded-rna RNA-Based Nanoparticles for Insect Gene Silencing was awarded recently to the Kansas State university Research Foundation a nonprofit corporation responsible for managing technology transfer activities
nanoparticles comprised of a nontoxic biodegradable polymer matrix and insect derived double-stranded ribonucleic acid or dsrna.
After testing a series of unsuccessful genetic techniques the team turned to a nanoparticle-based approach.
Once ingested the nanoparticles act as a Trojan horse releasing the loosely bound dsrna into the insect gut.
which the nanoparticle-based method was developed the technology can be applied to other insect pests Zhu said.
When you make baits containing gene-specific nanoparticles you may be able to kill the insects through the RNAI pathway.
Both that remarkable resolution and the precise chemical fingerprinting of individual nickel nanoclusters were also clearly evident in the topographic images of the sample surface even down to the height of a single atom.
'Last week US tech giants Google made a splash in the media announcing plans to develop new'disease-detecting magnetic nanoparticles'.
The technical definition is that a nanoparticle is an object that is less than 100 nanometres wide along one of its edges Professor Graham told us.
Nanoparticles can be made of anything they can be metallic organic or inorganic and they come in all manner of different shapes
Nanoparticles have been around for centuries. Ancient art has used nanoparticles. They're in stained glass windows. The Lycurgus Cup in The british Museum looks so magical
because it's made of glass containing gold nanoparticles. And more immediately they're already used in medical detectors for example the pregnancy tests you buy over-the-counter work use gold nanoparticles attached to antibodies.
They're really nothing new although they're incredibly interesting to researchers. Another ubiquitous use is in antimicrobial products
which can contain suspensions of silver nanoparticles (but don't drink them you'll go blue). Why are they good for medical detection?
Nanoparticles have an extremely high surface area in relation to their volume. This means they can carry a lot of'stuff'on their surface proteins from blood for example.
And this means they're good for detecting things because they can really boost a signalfor example a protein that's relatively scarce in the blood
and therefore difficult to measure can collect on some nanoparticles in amounts large enough to detect.
There's a bewildering amount of modification that researchers around the world are adding to the surface of nanoparticles.
either using optical (light-based) detection where nanoparticles are used to either emit light directly or change the optical properties of their surroundings or magnetic systems.
His team are doing some really interesting stuff with regards imaging using nanoparticles says Graham.
when you put nanoparticles into the body they tend to get removed from the body in the urine via the kidneys.
'This is where random nonspecific molecules stick to the nanoparticles and clog them up or deactivate them.
Starting with a solution of colloidal nanorods Yang and Ni built on the common self-assembly technique used to build nanoparticles.
The method developed in Zhang's research group can be applied to many other nanoparticles; indeed almost any structure that can self-assemble could be produced in this way.
#A quantum leap in nanoparticle efficiency (Phys. org) New research has unlocked the secrets of efficiency in nanomaterials that is materials with very tiny particles
Researchers found the precise geometry of nanoparticle pairs that maximises light concentration resolving a hotly debated area of quantum physics.
This geometry now determines the efficiency nanoparticle use as a chemical sensor in sensing minute quantities of chemicals in air and water.
concentration for fabricated nanoparticles. Professor Crozier said This work is important for engineers and scientists working in the nanomaterial industry y
they were able to quantify the relationship between the CARS light intensity and the nanoparticle size.
Gold nanoparticles on the surface of the receptacle change the colour of the light detected by the instrument.
Roughly, it measures the concentration of serum (or blood) methotrexate through gold nanoparticles on the surface of a receptacle.
the gold nanoparticles change the colour of the light detected by the instrument. And the colour of the light detected reflects the exact concentration of the drug in the blood sample.
#Nanoparticle technology triples the production of biogas Researchers of the Catalan Institute of Nanoscience and Nanotechnology (ICN2), a Severo Ochoa Centre of Excellence,
which allows increasing the production of biogas by 200%with a controlled introduction of iron oxide nanoparticles to the process of organic waste treatment.
The development of Biogàsplus was carried out by the ICN2's Inorganic nanoparticle group, led by ICREA researcher Víctor Puntes,
The system is based on the use of iron oxide nanoparticles as an additive which"feeds"the bacteria in charge of breaking down organic matter.
and at the same time transforms the iron nanoparticles into innocuous salt.""We believe we are offering a totally innovative approach to the improvement of biogas production and organic waste treatment,
since this is the first nanoparticle application developed with this in mind. In addition, it offers a significant improvement in the decomposition of organic waste
Applied Nanoparticles, a Gateway to the Market"Our idea is the result of many projects:
"We were studying the toxicity of iron oxide nanoparticles in the waste treatment of anaerobic biological processes when we discovered that not only were they not toxic,
With that in mind, they created Applied Nanoparticles, gestated at the ICN2 and currently in the process of signing a knowledge transfer agreement with the UAB."
The grant money went towards testing the capacity of iron oxide nanoparticles, which helped to verify the efficacy of its application in a pilot 100 litre digester.
The cost of this new nanofluid (to which nanoparticles are added in order to enhance and improve heat conductivity) is similar to that of the base fluid,
since both the nanoparticles and the stabilizers used are inexpensive. All these features make it suitable for industrial applications that employ heat transmission/exchange systems.
and increases the thermal conductivity by adding an exact proportion of nanoparticles consisting on carbon and other additives to the base fluid (diphenyl/diphenyl oxide),
which means that it does not give rise to any problems with pumping, the precipitation of nanoparticles or the obstruction of conduits.
because both the nanoparticles and the stabilizers used are abundant, readily accessible and inexpensive e
10.1038/nnano. 2014.211 An addressable quantum dot qubit with fault-tolerant control-fidelity Nature Nanotechnology DOI:
#DNA nanofoundries cast custom-shaped 3-D metal nanoparticles Researchers at the Wyss Institute for Biologically Inspired Engineering at Harvard university have unveiled a new method to form tiny 3d metal nanoparticles
The ability to mold inorganic nanoparticles out of materials such as gold and silver in precisely designed 3-D shapes is a significant breakthrough that has the potential to advance laser technology microscopy solar cells electronics environmental testing
We built tiny foundries made of stiff DNA to fabricate metal nanoparticles in exact three-dimensional shapes that we digitally planned
The paper's findings describe a significant advance in DNA NANOTECHNOLOGY as well as in inorganic nanoparticle synthesis Yin said.
For the very first time a general strategy to manufacture inorganic nanoparticles with user-specified 3d shapes has been achieved to produce particles as small as 25 nanometers or less with remarkable precision (less than 5 nanometers.
The 3d inorganic nanoparticles are conceived first and meticulously planned using computer design software. Using the software the researchers design three-dimensional frameworks of the desired size
and expanded to fill all existing space within the DNA framework resulting in a cuboid nanoparticle with the same dimensions as its mold. with the length width
Next researchers fabricated varied 3d polygonal shapes spheres and more ambitious structures such as a 3d Y-shaped nanoparticle and another structure comprising a cuboid shape sandwiched between two spheres proving that structurally-diverse
nanoparticles could be shaped using complex DNA mold designs. Given their unthinkably small size it may come as a surprise that stiff DNA molds are proportionally quite robust and strong able to withstand the pressures of expanding inorganic materials.
Although the team selected gold seedlings to cast their nanoparticles there is a wide range of inorganic nanoparticles that can be shaped forcibly through this process of DNA nanocasting.
A very useful property is that once cast these nanoparticles can retain the framework of the DNA mold as an outer coating enabling additional surface modification with impressive nanoscale precision.
#Nanoparticle research could enhance drug delivery through skin Scientists at the University of Southampton have identified key characteristics that enhance a nanoparticle's ability to penetrate skin in a milestone study which could have major implications for the delivery of drugs.
Nanoparticles are up to 100000 times smaller than the thickness of a human hair and drugs delivered using them as a platform can be concentrated more targeted
Although previous studies have shown that nanoparticles interact with the skin conditions in these experiments have not been controlled sufficiently to establish design rules that enhance penetration.
and functionality (controlled through surrounding molecules) of gold nanoparticles to see how these factors affect skin penetration.
By creating nanoparticles with different physicochemical characteristics and testing them on skin we have shown that positively charged nanorod shaped nanoparticles are two to six times more effective at penetrating skin than others says lead author Dr Antonios Kanaras.
When the nanoparticles are coated with cell penetrating peptides the penetration is enhanced further by up to ten times with many particles making their way into the deeper layers of the skin (such as the dermis.
Establishing which characteristics contribute to penetration is also important in discovering ways to prevent potentially toxic nanoparticles in other materials such as cosmetics from entering the skin.
The research which has been published in the journal Small drew on the medical expertise of Dr Neil Smyth and Dr Michael Ardern-Jones as well as contributions from physicist Professor Otto Muskens.
#Drug-infused nanoparticle is right for sore eyes For the millions of sufferers of dry eye syndrome their only recourse to easing the painful condition is to use drug-laced eye drops three times a day.
Now researchers from the University of Waterloo have developed a topical solution containing nanoparticles that will combat dry eye syndrome with only one application a week.
The eye drops progressively deliver the right amount of drug-infused nanoparticles to the surface of the eyeball over a period of five days before the body absorbs them.
The nanoparticles about 1/1000th the width of a human hair stick harmlessly to the eye's surface and use only five per cent of the drug normally required.
You can't tell the difference between these nanoparticle eye drops and water said Shengyan (Sandy) Liu a Phd candidate at Waterloo's Faculty of engineering who led the team of researchers from the Department of Chemical engineering and the Centre for Contact lens Research.
if we focused on infusing biocompatible nanoparticles with Cyclosporine A the drug in the eye drops
The research team is now focusing on preparing the nanoparticle eye drops for clinical trials with the hope that this nanoparticle therapy could reach the shelves of drugstores within five years.
#Targeted nanoparticles that combine imaging with two different therapies could attack cancer other conditions Nanosystems that are'theranostic'they combine both therapeutic and diagnostic functions present an exciting new opportunity for delivering drugs
and Engineering and colleagues at the National University of Singapore have created nanoparticles with two distinct anticancer functions
The nanoparticles also include the cell-targeting property essential for treating and imaging in the correct locations.
The natural fluorescence of the polymer assists with diagnosis and monitoring of therapy as it shows where nanoparticles have accumulated.
of which overexpressed a surface protein that could bind to the targeting peptide on the nanoparticles.
Fluorescence imaging indicated that the nanoparticles were taken up by the target cells and that ROS and doxorubicin were released within these cells all at significantly higher levels than in cells used as controls.
Introducing the multitasking nanoparticle More information: Yuan Y. Liu J. & Liu B. Conjugated-polyelectrolyte-based polyprodrug:
#Nanoparticles break the symmetry of light How can a beam of light tell the difference between left and right?
Gold nanoparticles on Glass fibres When a particle absorbs and emits light, this light is emitted not just into one direction."
His team has succeeded now in breaking this symmetry of emission using gold nanoparticles coupled to ultra-thin glass fibres.
This effect has now been demonstrated using a single gold nanoparticle on a glass fibre. The fibre is 250 times thinner than a human hair;
#Researcher develops optically traceable smart 2-D nanosheet that responds to ph Nanoparticles have the potential to revolutionize the medical industry
Finally they need to perform their function at the right moment ideally in response to a stimulus. The Nanoparticles By design Unit at the Okinawa Institute of Science
#'Stealth'nanoparticles could improve cancer vaccines Cancer vaccines have emerged recently as a promising approach for killing tumor cells before they spread.
And the key they report in the journal ACS Nano is in the vaccine's unique stealthy nanoparticles.
if stealthy nanoparticles they had developed and clinically tested in patients might hold the answer. The researchers injected the nanoparticles into mice.
They found that the particles which have no electric charge or surface molecules that would attract the attention of circulating immune cells were able to enter the mice's lymph nodes.
When molecules for signaling killer T cells were put inside the nanoparticles they hindered tumor growth far better than existing vaccines.
Nanogel-Based Immunologically Stealth Vaccine Targets Macrophages in the Medulla of Lymph node and Induces Potent Antitumor Immunity ACS Nano 2014 8 (9) pp 9209#9218.
We developed a nanoparticulate cancer vaccine by encapsulating a synthetic long peptide antigen within an immunologically inert nanoparticulate hydrogel (nanogel) of cholesteryl pullulan (CHP.
After subcutaneous injection to mice the nanogel-based vaccine was transported efficiently to the draining lymph node and was engulfed preferentially by medullary macrophages
The nanogel-based vaccine significantly inhibited in vivo tumor growth in the prophylactic and therapeutic settings compared to another vaccine formulation using a conventional delivery system incomplete Freund's adjuvant.
which may underlie the potency of the macrophage-oriented nanogel-based vaccine. These results indicate that targeting medullary macrophages using the immunologically stealth nanoparticulate delivery system is an effective vaccine strategy e
#Nanoparticles accumulate quickly in wetland sediment (Phys. org) A Duke university team has found that nanoparticles called single-walled carbon nanotubes accumulate quickly in the bottom sediments of an experimental wetland setting an action they say could indirectly damage the aquatic food chain.
if the nanoparticles provide Trojan horse piggyback rides to other harmful molecules. The results appear online in the journal Environmental science:
They found that the vast majority of the nanoparticles quickly accumulated in the sediment on the pond floor.
However they found no sign of nanoparticle buildup in any plants insects or fish living in the mesocosms.
These nanoparticles are really good at latching onto other molecules including many known organic contaminants said Ferguson.
The nanoparticle-pollutant package could then be eaten by sediment-dwelling organisms in a sort of'Trojan horse'effect allowing the adsorbed contaminants to accumulate up the food chain.
which incorporates biomaterial harvested from patients and gold nanoparticles.""Our goal was said twofold Dr. Dvir.""To engineer tissue that would not trigger an immune response in the patient,
"At his Laboratory for Tissue Engineering and Regenerative medicine, Dr. Dvir explored the integration of gold nanoparticles into cardiac tissue to optimize electrical signaling between cells."
we deposited gold nanoparticles on the surface of our patient-harvested matrix, 'decorating'the biomaterial with conductors,
"The result was that the nonimmunogenic hybrid patch contracted nicely due to the nanoparticles, transferring electrical signals much faster and more efficiently than non-modified scaffolds."
In the form of nanowires and nanoparticles it has particular potential for use in the manufacture of solar cells
They deposited metal nanoparticles on a silicon wafer and etched nanowires using aqueous H2o2. Although the researchers did not have precise control over the nanowire morphology they did observe that higher concentrations of H2o2 led to thicker nanowires.
Further observations of the morphology identified silicon nanocrystals at the nanowire ends which was corroborated by Raman studies of single nanowires.
These nanocrystals disappear on annealing as does the red photoluminescence. The researchers attribute the red photoluminescence to defect states between nanocrystals and surrounding oxide and excitonic transitions.
As the researchers conclude in their report These results of Si nanowire arrays are believed to be useful for future optoelectronic and photovoltaic applications.
then the National Institute of Standards and Technology (NIST) can now make anyone working with nanoparticles very happy.
the nanocrystals are etched from a silicon wafer, separated using ultrasound and then stabilized within an organic shell.
"For anyone working with nanomaterials at dimensions 5 nanometers or less, our well-characterized nanoparticles can ensure confidence that their measurements are accurate,
Silicon nanoparticles such as those in RM 8027 are being studied as alternative semiconductor materials for next-generation photovoltaic solar cells and solid-state lighting,
silicon nanoparticles may one day serve as easily detectable"tags"for tracking nanosized substances in biological, environmental or other dynamic systems s
#Self-organized indium arsenide quantum dots for solar cells Kouichi Yamaguchi is recognized internationally for his pioneering research on the fabrication and applications of'semiconducting quantum dots'(QDS.
We exploit the'self-organization'of semiconducting nanocrystals by the'Stranski-Krasnov (SK) mode of crystal growth for producing ordered highly dense
and highly uniform quantum dots explains Yamaguchi. Our'bottom-up'approach yields much better results than the conventional photolithographic
Notably electrons in quantum dot structures are confined inside nanometer sized three dimension boxes. Novel applications of'quantum dots'including lasers biological markers qubits for quantum computing
and photovoltaic devices arise from the unique optoelectronic properties of the QDS when irradiated with light or under external electromagnetic fields.
This density was one of the critical advances for achieving high efficiency quantum dot based photovoltaic devices says Yamaguchi.
Resonant energy transfer from quantum dots to graphene More information: Edes Saputra Jun Ohta Naoki Kakuda and Koichi Yamaguchi Self-Formation of In-Plane Ultrahigh-Density Inas Quantum dots on Gaassb/Gaas (001) Appl.
Phys. Express 5 125502 (2012. DOI: dx. doi. org/10.1143/APEX. 5. 125502 Katsuyoshi Sakamoto Yasunori Kondo Keisuke Uchida and Koichi Yamaguchi Quantum dot density dependence of power conversion
efficiency of intermediate-band solar cells J. Appl. Phys. 112 124515 (2012
#Magnetic field opens and closes nanovesicle Chemists and physicists of Radboud University managed to open and close nanovesicles using a magnet.
Polymersome magneto-valves for reversible capture and release of nanoparticles. Nature Communications DOI: 10.1038/ncomms601 6
and hard-wearing nanocomposites is obtaining an even distribution of the nanoparticles in the metal matrix.
They then injected a slurry of aluminum oxide nanoparticles into the holes and heated the sheet in an oven.
Placing the nanoparticles in the sheet prior to the friction stir processing step significantly increased the concentration of nanoparticles in the composite.
They first demonstrated that the nanoparticles were dispersed uniformly which means the material has no weak points.
and without the Al2o3 nanoparticles the team showed that the nanoparticles contributed to the reduction in grain size.
The best nanoparticle distribution and smallest aluminum alloy grains were obtained after passing the rotating tool through the sheet four times.
Scientists use nanoparticles to control growth of materials More information: Guo J. F. Liu J. Sun C. N. Maleksaeedi S. Bi G. et al.
#Gold nanoparticles linked to single stranded-dna DNA create a simple but versatile genetic testing kit Tests for identifying genetic variations among individuals
The researchers used gold nanoparticles attached to short sections of DNA that bind to specific complementary sequences of DNA through the base pairing that holds together double-stranded DNA.
#Experts create unique nanoparticles for aerospace industry A development of three universities enables improved thermal and electronic properties on devices with nickel-titanium alloys.
Experts collaborated to produce nanoparticles made of a titanium-nickel alloy used in the development of thermal and electrical sensors that control the operation of high-tech devices such as those used in aerospace,
Meanwhile, the team at the UANL manufactured nanoparticles used in the sensors, and after a series of tests confirmed the effectiveness of the titanium-nickel as an electrical and thermal conductor.
With nanoparticles, they produced temperature-sensitive devices that transmit electrical energy to the system but do not cause overheating.
Then nanoparticles were obtained by thermal evaporation techniques where the molecular bonds of the metals degraded as a powder
Besides generating nanoparticles for sensors, another goal of this proyect is to train high level human resources in the areas of metallurgy alloys with shape memory,
Using an optical microstructure and gold nanoparticles, they have amplified the interaction of light with DNA to the extent that they can now track interactions between individual DNA molecule segments.
These protons make their way to the platinum nanoparticles which sit on top of the titanium dioxide. Hydrogen is produced by the interaction of the protons
For this study scientists looked at a positive electrode made of billions of nanoparticles of lithium iron phosphate.
Previous studies produced conflicting views of how the nanoparticles behaved. To probe further researchers made small coin cell batteries charged them with different levels of current for various periods of time quickly took them apart
We were able to look at thousands of electrode nanoparticles at a time and get snapshots of them at different stages during charging
Analyzing the data using a sophisticated model developed at MIT the researchers discovered that only a small percentage of nanoparticles absorbed and released ions during charging even
Aligned CNTS were intercalated firstly into the interlayer spaces of the layered catalyst embedded with metal nanoparticles (NPS) through a low-temperature (L-T) CVD
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