#Nanoscale light-emitting device has big profile University of Wisconsin-Madison engineers have created a nanoscale device that can emit light as powerfully as an object 10,000 times its size.
and his collaborators describe a nanoscale device that drastically surpasses previous technology in its ability to scatter light.
They showed how a single nanoresonator can manipulate light to cast a very large"reflection."
"The nanoresonator's capacity to absorb and emit light energy is such that it can make itself--and, in applications,
Given the nanoresonator's capacity to absorb large amounts of light energy, the technology also has potential in applications that harvest the sun's energy with high efficiency.
Because the nanoresonator has a large optical cross-section--that is, an ability to emit light that dramatically exceeds its physical size--it can shed a lot of heat energy,
Response time has been calculated to be 84 seconds for a capacitor sensor with oxide layer thickness of 28 nanometers.
#Nanospheres shield chemo drugs, safely release high doses in response to tumor secretions Scientists have designed nanoparticles that release drugs in the presence of a class of proteins that enable cancers to metastasize.
and build that into a nanoscale carrier that can seek out a tumor and deliver a payload of drug,
In mice treated with the nanoparticles coated with peptides that are impervious to MMPS or given saline,
Callmann holds a fellowship through the Cancer Researchers in Nanotechnology Program at UC San diego. The National Institute of Biomedical Imaging
and could be important for future device technologies as well as for fundamental studies of electron transport in molecular nanostructures.
similar to the working principle of a quantum dot gated by an external electrode. In our case, the charged atoms nearby provide the electrostatic gate potential that regulates the electron flow
But there is a substantial difference between a conventional semiconductor quantum dot comprising typically hundreds or thousands of atoms and the present case of a surface-bound molecule:
Piet Brouwer, a physicist at FUB and expert in quantum transport theory, said that his intriguing behavior goes beyond the established picture of charge transport through a gated quantum dot.
#Magnetic nanoparticles could be key to effective immunotherapy: New method moves promising strategy closer to clinical use Abstract:
Now, results of a study led by Johns Hopkins investigators suggests that a device composed of a magnetic column paired with custom-made magnetic nanoparticles may hold a key to bringing immunotherapy into widespread and successful clinical use.
'410-955-8236copyright Johns Hopkins Medicineissuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.
2015nanocrystalline Thin-film Solar cells July 15th, 2015better memory with faster lasers July 14th, 2015cancer Nanospheres shield chemo drugs,
2015chemotherapeutic coatings enhance tumor-frying nanoparticles: Duke university researchers add a drug delivery mechanism to a nanoparticle therapy already proven to target,
heat and destroy tumors July 13th, 2015super graphene can help treat cancer July 10th, 2015govt. -Legislation/Regulation/Funding/Policy Researchers Build a Transistor from a Molecule and A few Atoms July 14th, 2015world first:
2015chemotherapeutic coatings enhance tumor-frying nanoparticles: Duke university researchers add a drug delivery mechanism to a nanoparticle therapy already proven to target,
heat and destroy tumors July 13th, 2015magnetic hyperthermia, an auxiliary tool in cancer treatments July 8th, 2015discoveries For faster,
2015polymer mold makes perfect silicon nanostructures July 14th, 2015announcements Agilent technologies and A*STAR's Bioprocessing Technology Institute Collaborate on New Bioanalytical Methodologies July 15th, 2015for faster,
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RIT Collaborate to Improve Blood Dialysis Filters July 8th, 2015miniature Technology, Large-scale Impact: Winner of the 2015 Lindros Award for translational medicine, Kjeld Janssen is pushing the boundaries of the emerging lab-on-a-chip technology July 7th, 201 0
#Nanowires give'solar fuel cell'efficiency a tenfold boost: Eindhoven researchers make important step towards a solar cell that generates hydrogen A solar cell that produces fuel rather than electricity.
Researchers at Eindhoven University of Technology (TU/e) and FOM Foundation today present a very promising prototype of this in the journal Nature Communications.
Processing the gallium phosphide in the form of very small nanowires is novel and helps to boost the yield by a factor of ten.
The researchers have overcome this problem by making a grid of very small Gap nanowires, measuring five hundred nanometers (a millionth of a millimeter) long and ninety nanometers thick.
"For the nanowires we needed ten thousand less precious Gap material than in cells with a flat surface.
A new study by researchers from the California Nanosystems Institute at UCLA is the first demonstration of electroluminescence from multilayer molybdenum disulfide,
This objective was achieved by creating a homogenous coating made of a nanocomposite of zinc oxide/nitrogen silver (N-Ag/Zno) on the fabrics.
the processing of the woolen fabric samples by using optimum amount of honeycomb nanocomposite such as N-Ag/Zno improves the biological, mechanical and hydrophilicity of the fabrics.
Among the other advantages of the use of this nanocomposite in the production of fabrics, mention can be made of creating a delay in flammability,
Ultrasonic waves are also the cause of the homogenous distribution of simultaneous charges of silver and nitrogen on the surfaces of zinc oxide nanoparticles.
Finally, the abovementioned properties are created in the final product by processing of the woolen fabrics with the nanocomposite.
New research from Rice university could make it easier for engineers to harness the power of light-capturing nanomaterials to boost the efficiency
In a study published July 13 in Nature Communications, scientists from Rice's Laboratory for Nanophotonics (LANP) describe a new method that solar-panel designers could use to incorporate light-capturing nanomaterials into future designs.
LANP graduate student Bob Zheng and postdoctoral research associate Alejandro Manjavacas created a methodology that solar engineers can use to determine the electricity-producing potential for any arrangement of metallic nanoparticles.
LANP researchers study light-capturing nanomaterials, including metallic nanoparticles that convert light into plasmons, waves of electrons that flow like a fluid across the particles'surface.
For example, recent LANP plasmonic research has led to breakthroughs in color-display technology, solar-powered steam production and color sensors that mimic the eye."
when you shine light on a metallic nanoparticle or nanostructure is that you can excite some subset of electrons in the metal to a much higher energy level,
"said Zheng, who works with LANP Director and study co-author Naomi Halas.""Scientists call these'hot carriers'or'hot electrons.'"
and materials science and nanoengineering, said hot electrons are particularly interesting for solar-energy applications because they can be used to create devices that produce direct current
Halas said one way to lower manufacturing costs would be to incorporate high-efficiency light-gathering plasmonic nanostructures with low-cost semiconductors like metal oxides.
the plasmonic nanostructures have optical properties that can be controlled precisely by modifying their shape.""We can tune plasmonic structures to capture light across the entire solar spectrum,
Each consisted of a plasmonic gold nanowire atop a semiconducting layer of titanium dioxide. In the first setup, the gold sat directly on the semiconductor,
#UT Dallas nanotechnology research leads to super-elastic conducting fibers Abstract: An international research team based at The University of Texas at Dallas has made electrically conducting fibers that can be stretched reversibly to over 14 times their initial length and
senior author of the paper and director of the Alan G. Macdiarmid Nanotech Institute at UT Dallas. One key to the performance of the new conducting elastic fibers is the introduction of buckling into the carbon nanotube
the carbon nanofibers form a complex buckled structure, which allows for repeated stretching of the fiber."
the Robert A. Welch Distinguished Chair in Chemistry at UT Dallas."We make the inelastic carbon nanotube sheaths of our sheath-core fibers super stretchable by modulating large buckles with small buckles,
and a research associate in the Nanotech Institute, said the structure of the sheath-core fibers"has further interesting and important complexity."
"This novel combination of buckling in two dimensions avoids misalignment of nanotube and rubber core directions, enabling the electrical resistance of the sheath-core fiber to be insensitive to stretch."
"By adding a thin overcoat of rubber to the sheath-core fibers and then another carbon nanotube sheath,
which the buckled nanotube sheaths serve as electrodes and the thin rubber layer is a dielectric, resulting in a fiber capacitor.
a research associate in the Nanotech Institute and an author of the paper. In the laboratory, Nan Jiang, a research associate in the Nanotech Institute,
demonstrated that the conducting elastomers can be fabricated in diameters ranging from the very small--about 150 microns,
"said Dr. Raquel Ovalle-Robles MS'06 Phd'08, an author on the paper and chief research and intellectual properties strategist at Lintec of America's Nanoscience & Technology Center."
"The only exotic component is the carbon nanotube aerogel sheet used for the fiber sheath.""Last year, UT Dallas licensed to Lintec of America a process Baughman's team developed to transform carbon nanotubes into large-scale structures, such as sheets.
Lintec opened its Nanoscience & Technology Center in Richardson, Texas, less than 5 miles from the UT Dallas campus,
to manufacture carbon nanotube aerogel sheets for diverse applications.#####The Science research was supported by the Air force Office of Scientific research, the Robert A. Welch Foundation, the U s army, the National institutes of health, the National Science Foundation and the Office of Naval Research.
In addition to Baughman, Liu, Haines, Jiang and Ovalle-Robles, paper authors based at UT Dallas'Nanotech Institute are research scientists Dr. Shaoli Fang and Dr. Marcio Lima,
The researchers report in Nano Letters that by combining inorganic semiconductor nanocrystals with organic molecules, they have succeeded in"upconverting"photons in the visible and near-infrared regions of the solar spectrum."
In their experiments, Bardeen and Tang worked with cadmium selenide and lead selenide semiconductor nanocrystals.
The cadmium selenide nanocrystals could convert visible wavelengths to ultraviolet photons, while the lead selenide nanocrystals could convert near-infrared photons to visible photons.
In lab experiments the researchers directed 980-nanometer infrared light at the hybrid material, which then generated upconverted orange yellow fluorescent 550-nanometer light,
almost doubling the energy of the incoming photons. The researchers were able to boost the upconversion process by up to three orders of magnitude by coating the cadmium selenide nanocrystals with organic ligands,
providing a route to higher efficiencies.""This 550--nanometer light can be absorbed by any solar cell material,
"Bardeen said.""The key to this research is the hybrid composite material--combining inorganic semiconductor nanoparticles with organic compounds.
Organic compounds cannot absorb in the infrared but are good at combining two lower energy photons to a higher energy photon.
By using a hybrid material, the inorganic component absorbs two photons and passes their energy on to the organic component for combination.
and provided the nanocrystals. The UCR Office of Technology Commercialization has filed a provisional patent on the technology y
#Laboratorial Performance of Nanocomposite Membrane Improved in Water purification The membrane is able to separate dye components from a large amount of water.
The aim of this research was to produce a polymeric nanocomposite membrane and to modify its performance.
The polymeric membrane is made of polyethersulfone nanocomposite and multiwalled carbon nanotubes were used in its structure. Carbon nanotubes have unique properties
and they have numerous applications in the production of nanocomposite membranes. However, the heterogeneous distribution of nanoparticles in the structure of the membrane polymer can be considered as an important problem.
The surface of nanoparticles was coated with polystyrene sulfonate as a new approach to improve the homogenous distribution of nanoparticles in polymer.
This method significantly affects the distribution of nanoparticles in the membrane polymer and it modifies the structure and the separation performance.
Results of the research have been published in Journal of Hazardous Materials vol. 298, issue 1, 2015, pp. 111-121 1
#Perfect Optical Properties in Production of Aluminum oxide Colloid Nanoparticles Iranian researchers produced nanoparticles in forms of colloids which have very good optical properties and conserve their stability for a long time.
Perfect Optical Properties in Production of Aluminum oxide Colloid Nanoparticles Aluminum oxide colloid nanoparticles have applications in various fields
and industries, including laser, solar cells, production of transistors and nanomedicine. The colloid form of these particles have very interesting properties and characteristics,
and their size, shape and properties at nanometric scale can be controlled very well. According to the researchers, the stability of nanomaterials in long period is one of the most important challenges in the production of nanomaterials.
The large difference between surface and volume energy of nanoparticles is the cause of this problem.
This energy gap, in addition to other parameters such as density difference in electrical charges and type and density of surface atoms,
which are affected by the morphology of the particles, prevent the easily formation of a stable colloid.
These parameters in addition to other obstacles such as the creation of stable chemical complexes in an uncontrolled situation prevents the formation of alumina nanoparticles in form of colloid,
The produced nanoparticles have very high stability and appropriate optical properties and they can be used in the production of optical devices.
Taking into account the desirable optical properties of the produced nanoparticles, it is expected that an important step is taken in the development of nanotechnology in the field of medicine,
electronics and photonics after passing the required tests and obtaining mass-production of these nanoparticles.
Results of the research have been published in Journal of the American Ceramic Society, vol. 98, issue 6, 2015, pp. 1818-1822.##
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Major milestone in molecular electronics scored by Berkeley Lab and Columbia University team"Using a single symmetric molecule, an ionic solution and two gold electrodes of dramatically different exposed surface areas,
and a member of the Kavli Energy Nanoscience Institute at Berkeley (Kavli ENSI.""The asymmetry necessary for diode behavior originates with the different exposed electrode areas and the ionic solution,
In 1974, molecular electronics pioneers Mark Ratner and Arieh Aviram theorized that an asymmetric molecule could act as a rectifier, a one-way conductor of electric current.
"The Berkeley Lab-Columbia University team believes their new approach to a single-molecule diode provides a general route for tuning nonlinear nanoscale-device phenomena that could be applied to systems beyond single-molecule junctions
and energy flow at the nanoscale. What is exciting to me about this field is its multidisciplinary nature-the need for both physics and chemistry-and the strong beneficial coupling between experiment and theory."
"Neaton, Venkataraman and Campos are the corresponding authors of a paper describing this research in Nature Nanotechnology.
The new material is composed of a silica sol-gel thin film containing polar groups linked to the silicon atoms and a nanoscale self-assembled monolayer of an octylphosphonic acid,
To address that, they deposited a nanoscale self-assembled monolayer of n-octylphosphonic acid on top of the hybrid sol-gel.
Less than a nanometer thick the monolayer serves as an insulating layer.""Our silica sol-gel is a hybrid material
and biology,"says study co-senior author Euisik Yoon, Ph d.,professor of electrical engineering and computer science and of biomedical engineering and director of the Lurie Nanofabrication Facility at the U-M College of Engineering."
and after it was compressed (b). Compression makes the graphene nanoflakes more dense, which improves the electrical conductivity of the laminate.
such as solutions made from metal nanoparticles. To make the ink, graphene flakes are mixed with a solvent,
Now a team of Northwestern University researchers has found a way to print three-dimensional structures with graphene nanoflakes.
about 20 nanometers in size the same size range as the smallest features that can now be produced in microchips.
A Transparent and Photoluminescent Foldable Nanocellulose/Quantum dot Paper")a new step toward bendable electronics. They have developed the first light-emitting, transparent and flexible paper out of environmentally friendly materials via a simple, suction-filtration method.
clear nanocellulose paper made out of wood flour and infused it with biocompatible quantum dots tiny, semiconducting crystals made out of zinc and selenium.
The researchers created a stretchable and transparent sensor by layering a carbon nanotube film on two different kinds of electrically conductive elastomers.
#Researchers form complete nanobatteries inside nanopores Nanostructured batteries, when properly designed and built, offer promise for delivering their energy at much higher power and longer life than conventional technology.
nanostructures (such as nanowires) must be paced into dense"nanostructure forests, "producing 3-D nanogeometries in which ions and electrons must rapidly move.
identical nanopores in an alumina template to determine how well ions and electrons can do their job in such ultrasmall environments.
Up to a billion of these nanopore batteries could fit in a grain of sand. The nanobatteries were fabricated by atomic layer deposition to make oxide nanotubes (for ion storage) inside metal nanotubes for electron transport, all inside each end of the nanopores.
The tiny nanobatteries work extremely well: they can transfer half their energy in just a 30 second charge
Complete nanobatteries are formed in each nanopore of a dense nanopore array (2 billion per cm2),
using atomic layer deposition to carefully control thickness and length of multilayer concentric nanotubes as electrodes at each end.
Research Insights Tiny batteries formed inside nanopores were used to demonstrate that properly scaled nanostructures can utilize the full theoretical capacity of the charge storage material
and discharge) and for extended cycling, demonstrating that precise nanostructures can be constructed to assess the fundamentals of ion
and electron transport in nanostructures for energy storage and to test the limits of 3-D nanobattery technology y
#Nanotechnology helps protect patients from bone infection Leading scientists at the University of Sheffield have discovered nanotechnology could hold the key to preventing deep bone infections,
Scientists used revolutionary nanotechnology to work on small polymer layers inside implants which measure between 1 and 100 nanometers.
Lead researcher Paul Hatton Professor of Biomaterials Sciences at the University of Sheffield, said: icroorganisms can attach themselves to implants
this new application for nanotechnology could save health providers such as the NHS millions of pounds every year.
The study, funded by the European commission and the UK Engineering and Physical sciences Research Council, is published in Acta Biomaterialia("Functionalised nanoscale coatings using layer-by-layer assembly for imparting antibacterial properties to polylactide
An international research team led by University at Buffalo engineers has developed nanotechnology that promises to make SERS simpler and more affordable.
The dielectric separates the mirror with tiny metal nanoparticles randomly spaced at the top of the substrate.
and measure chemical and biological molecules using a broadband nanostructure that traps wide range of light,
The dielectric separates the mirror with tiny metal nanoparticles randomly spaced at the top of the substrate."
Using nanocellulose broken down from tree fibres, a team from KTH Royal Institute of technology and Stanford university produced an elastic,
created with wood pulp nanocellulose. Image: Max Hamedi and Wallenberg Wood Science Center)" It is possible to make incredible materials from trees
The nanocellulose is dissolved, frozen and then freeze-dried so that the moisture evaporates without passing through a liquid state.
highly structured barrier, says the chemical nanotechnology expert. The protective layer is just a few micrometers thick
The specially formulated mixture contains a solvent, a binder and nanoscale and platelet-like particles;
Nanocomposite Technology, Interface Materials, and Bio Interfaces s
#Transient melting of a nanocrystal: seeing is believing (Nanowerk News) Jesse Clark, working as a postdoc in the LCN group of Ian Robinson,
has discovered a spectacular transient melting phenomenon in nanocrystals. Coherent X-ray diffraction experiments, carried out at the LCLS X-ray free electron laser facility at Stanford,
have allowed snapshot imaging of a single 300 nm gold nanocrystal in the picosecond time interval after the particle was excited with a laser.
The crystal was found to expand uniformly following the excitation and to reach the melting point about 50 ps later("Imaging transient melting of a nanocrystal using an X-ray laser").
"What is striking about the result, shown in the figure, is that the crystal melts from the outside
Imaging transient melting of a nanocrystal using an x-ray laser. Snapshot projection images of a gold nanocrystal, 300nm across, before and after excitation with a femtosecond laser.
The second image, 50 picoseconds after excitation, displays a low density skin that returns to the original density at later times This result has significant implications beyond our basic understanding of the melting process.
#Surface-modified nanoparticles endow coatings with combined properties Fabricators and processors alike demand consistently high quality for their intermediate and final products.
The INM Leibniz Institute for New Materials uses nanoparticles as design element for such multifunctional coatings.
These nanoparticles are adapted specifically to the particular application by Small Molecule Surface Modification (SMSM. How this approach can be used to produce custom-tailored coatings will be demonstrated at the Techconnect World trade fair on 15 and 16 june in WASHINGTON DC, USA,
the nanoparticles used can be modified surface with organic moieties. Small Molecule Surface Modification (SMSM) bestows specific combinations of desired properties, for example hydrophilic, hydrophobic, adhesive, anti-adhesive
Nanoparticles thus modified are used to develop nanocomposites: they combine the physical solid-state properties of e g. ceramics or semiconductors with classic polymer-processing technology.
Titanium dioxide, barium titanate, indium-tin oxide or zirconium dioxide, for instance, are used as nanoparticles. In addition to the chemical intrinsic composition of the nanoparticles and their SMSM surface treatment, the properties that are attainable for the desired coatings also vary with the size and dispersal mode of the nanoparticles.
INM composite systems are produced via wet-chemical processes. The modified nanoparticles and additives combine with a polymer matrix (an epoxy resin, an acrylate,
a polyimide for example) or a hybrid matrix (organic-inorganic) to produce a coatable Nanomer composite system. he modular principle makes it possible to achieve a number of properties at one
the chemist summarizes the potential of nanocomposite technology. Read more: Surface-modified nanoparticles endow coatings with combined propertie e
#Nano-spirals could guard against identity theft (Nanowerk News) Take gold spirals about the size of a dimeand shrink them down about six million times.
Most other investigators who have studied the remarkable properties of microscopic spirals have done so by arranging discrete nanoparticles in a spiral pattern:
Although some successful examples of the incorporation of these complexes into micro/nanoparticles and liquids crystals have been reported during the last years,
#Next-generation illumination using silicon quantum dot-based white-blue LED (Nanowerk News) A silicon quantum dot (QD)- based hybrid inorganic/organic light-emitting diode (LED) that exhibits white-blue electroluminescence
and their collaborators (Applied Physics Letters,"White-blue electroluminescence from a Si quantum dot hybrid light-emitting diode").
For the authors of the research, finding a nanothermometer sensitive enough at this scale is a great step forward in the field of nanotechnology, with applications in biology, chemistry, physics and even in the diagnosis and treatment of diseases s
#Injectable nanoelectronics for treatment of neurodegenerative diseases It's a notion that might be pulled from the pages of science-fiction novel-electronic devices that can be injected directly into the brain,
Professor of Chemistry, an international team of researchers developed a method for fabricating nanoscale electronic scaffolds that can be injected via syringe.
The study is described in a June 8 paper in Nature Nanotechnology("Syringe-injectable electronics"."Contributing to the work were 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,
The discoveries published in the journal ACS Nano("Bio-Inspired Structural Colors Produced via Self-Assembly of Synthetic Melanin Nanoparticles")reflect a milestone in biomimicry research.
1 micrometer wide and 90 nanometers thick), connected tightly to a chip. To get an idea how it works,
The sinusoidally modulated control signal makes the cantilever oscillate at an amplitude of up to 20 nanometers.
Because the changes of the electromagnetic field in such systems are measured in tens of nanometers, researchers use the term"nanophotonics"-so the prefix"nano"is used not here just as a fad!
Without the nanoscale waveguide and the cantilever, the chip simply wouldn't work. Abig cantilever cannot be made to oscillate by freely propagating light,
simple process for making platinum"nano-raspberries"microscopic clusters of nanoscale particles of the precious metal("Stability and phase transfer of catalytically active platinum nanoparticle suspensions").
"Colorized micrographs of platinum nanoparticles made at NIST. The raspberry color suggests the particles? corrugated shape,
Nanoparticles can act as catalysts to help convert methanol to electricity in fuel cells. NIST's 40-minute process for making nano-raspberries, described in a new paper,*has several advantages.
For fuel cells, nanoparticles often are mixed with solvents to bind them to an electrode. To learn how such formulas affect particle properties,
"The NIST team measured conditions under which platinum particles, ranging in size from 3 to 4 nanometers (nm) in diameter,
Because the nanoparticles clumped up slowly and not too much in methanol, the researchers concluded that the particles could be transferred to that solvent,
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