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Surface-modified nanoparticles endow coatings with combine properties

March 27, 2015 9:56 am | by Leibniz Institute for New Materials | News | Comments

Nanoparticles are specifically adapted to the particular application by Small Molecule Surface Modification. Thereby surfaces of work pieces or moldings are expected to exhibit several different functions at one and the same time. Fabricators and processors alike demand consistently high quality for their intermediate and final products. The properties of these goods usually also have to meet specific requirements.

Processing tech converts packing peanuts to battery components

March 23, 2015 7:53 am | by Emil Venere, Purdue Univ. | News | Comments

Researchers have shown how to convert waste packing peanuts into high-performance carbon...

Spot treatment

March 19, 2015 1:41 pm | by Sonia Fernandez, Univ. of California, Santa Barbara | News | Comments

Acne, a scourge of adolescence, may be about to meet its ultra-high-tech match. By using a...

Sweet nanoparticles target stroke

March 13, 2015 11:42 am | by Spanish Foundation for Science and Technology | News | Comments

Materials resulting from chemical bonding of glucosamine, a type of sugar, with fullerenes, kind...

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Magnetic brain stimulation

March 13, 2015 7:54 am | by David L. Chandler, MIT News Office | Videos | Comments

Researchers at Massachusetts Institute of Technology have developed a method to stimulate brain tissue using external magnetic fields and injected magnetic nanoparticles: a technique allowing direct stimulation of neurons, which could be an effective treatment for a variety of neurological diseases, without the need for implants or external connections.

Researchers manipulate gold-coated nanoparticles with lasers

March 12, 2015 11:56 am | by Ludwig Maximillian Univ. of Munich | News | Comments

Tiny glass nanospheres coated on one side with a very fine gold film: Ludwig Maximillian Univ. of Munich scientists have shown that particles modified in this way can be moved about with high precision using laser beams, creating an optically controlled micro-elevator.

Nanodevice defeats drug resistance

March 3, 2015 7:30 am | by Anne Trafton, MIT News Office | News | Comments

Chemotherapy often shrinks tumors at first, but as cancer cells become resistant to drug treatment, tumors can grow back. A new nanodevice developed by Massachusetts Institute of Technology researchers can help overcome that by first blocking the gene that confers drug resistance, then launching a new chemotherapy attack against the disarmed tumors.

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Shape-shifting groups of nanorods release heat differently

February 19, 2015 9:11 am | by Justin H.S. Breaux, Argonne National Laboratory | News | Comments

Researchers have revealed previously unobserved behaviors that show how details of the transfer of heat at the nanoscale cause nanoparticles to change shape in ensembles.

Researchers develop a cost-effective, efficient rival for platinum

February 18, 2015 10:39 am | by Aalto Univ. | News | Comments

Researchers succeeded in creating an electrocatalyst that is needed for storing electric energy made of carbon and iron. A challenge that comes with the increased use of renewable energy is how to store electric energy. Platinum has traditionally been used as the electrocatalyst in electrolyzers that store electric energy as chemical compounds.

Nano-antioxidants prove their potential

February 10, 2015 8:23 am | by Mike Williams, Rice Univ. | News | Comments

Injectable nanoparticles that could protect an injured person from further damage due to oxidative stress have proven to be astoundingly effective in tests to study their mechanism. A team of scientists designed methods to validate their 2012 discovery that combined polyethylene glycol-hydrophilic carbon clusters could quickly stem the process of overoxidation that can cause damage in the minutes and hours after an injury.

Precision growth of light-emitting nanowires

February 6, 2015 9:12 am | by Kate Greene, Lawrence Berkeley National Laboratory | News | Comments

A novel approach to growing nanowires promises a new means of control over their light-emitting and electronic properties. In a recent issue of Nano Letters, scientists from Lawrence Berkeley National Lab demonstrated a new growth technique that uses specially engineered catalysts. These catalysts, which are precursors to growing the nanowires, have given scientists more options than ever in turning the color of light-emitting nanowires.

Worms lead way to test nanoparticle toxicity

February 3, 2015 8:12 am | by Mike Williams, Rice Univ. | News | Comments

The lowly roundworm is the star of an ambitious Rice Univ. project to measure the toxicity of nanoparticles. The low-cost, high-output study measures the effects of many types of nanoparticles not only on individual organisms but also on entire populations. The researchers tested 20 types of nanoparticles and determined that five, including the carbon-60 molecules (“buckyballs”) discovered at Rice in 1985, showed little to no toxicity.

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One nanoparticle, six types of medical imaging

January 21, 2015 8:22 am | by Charlotte Hsu, Univ. at Buffalo | News | Comments

It’s technology so advanced that the machine capable of using it doesn’t yet exist. Using two biocompatible parts, Univ. at Buffalo researchers and their colleagues have designed a nanoparticle that can be detected by six medical imaging techniques: computed tomography (CT) scanning, positron emission tomography (PET) scanning, photoacoustic imaging, fluorescence imaging, upconversion imaging and Cerenkov luminescence imaging.

New “triggered-release” mechanism could improve drug delivery

January 16, 2015 11:58 am | by Tom Frew, International Press Officer, Univ. of Warwick | News | Comments

More efficient medical treatments could be developed thanks to a new method for triggering the rearrangement of chemical particles. The new method, developed at the Univ. of Warwick, uses two “parent” nanoparticles that are designed to interact only when in proximity to each other and trigger the release of drug molecules contained within both.

Nanoparticles for clean drinking water

January 16, 2015 11:47 am | by Univ. of Twente | News | Comments

One way of removing harmful nitrate from drinking water is to catalyze its conversion to nitrogen. This process suffers from the drawback that it often produces ammonia. By using palladium nanoparticles as a catalyst, and by carefully controlling their size, this drawback can be eliminated. It was research conducted by Yingnan Zhao of the Univ. of Twente’s MESA+ Institute for Nanotechnology that led to this discovery.

Gold nanoparticles show promise for early detection of heart attacks

January 15, 2015 12:29 pm | by New York Univ. | News | Comments

New York Univ. Polytechnic School of Engineering professors have been collaborating with researchers from Peking Univ. on a new test strip that is demonstrating great potential for the early detection of certain heart attacks. The new colloidal gold test strip can test for cardiac troponin I (cTn-I) detection.

Controlling the properties of nanomaterials

January 13, 2015 8:43 am | by Katie Bethea, Oak Ridge National Laboratory | News | Comments

Scientists at Oak Ridge National Laboratory are learning how the properties of water molecules on the surface of metal oxides can be used to better control these minerals and use them to make products such as more efficient semiconductors for organic light-emitting diodes and solar cells, safer vehicle glass in fog and frost and more environmentally friendly chemical sensors for industrial applications. 

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New approach may lead to inhalable vaccines for influenza, pneumonia

January 8, 2015 9:29 am | by Matt Shipman, News Services, North Carolina State Univ. | News | Comments

Researchers at North Carolina State Univ. and the Univ. of North Carolina at Chapel Hill have uncovered a novel approach to creating inhalable vaccines using nanoparticles that shows promise for targeting lung-specific diseases, such as influenza, pneumonia and tuberculosis.

Researchers synthesize lead sulfide nanocrystals of uniform size

January 5, 2015 10:26 am | by Massachusetts Institute of Technology | News | Comments

Lead sulfide nanocrystals suitable for solar cells have a nearly one-to-one ratio of lead to sulfur atoms, but Massachusetts Institute of Technology (MIT) researchers discovered that to make uniformly sized quantum dots, a higher ratio of lead to sulfur precursors—24 to 1—is better.

Gelatin nanoparticles could deliver drugs to the brain

January 2, 2015 8:12 am | by Liz Ahlberg, Physical Sciences Editor, Univ. of Illinois, Urbana-Champaign | News | Comments

Stroke victims could have more time to seek treatment that could reduce harmful effects on the brain, thanks to tiny blobs of gelatin that could deliver the medication to the brain noninvasively. Univ. of Illinois researchers found that gelatin nanoparticles could be laced with medications for delivery to the brain, and that they could extend the treatment window for when a drug could be effective.

Nanotech used to engineer ACL replacements

January 2, 2015 7:50 am | by Amanda Morris, Northwestern Univ. | News | Comments

Lindsey Vonn. Derrick Rose. Tom Brady. Mickey Mantle. They have all fallen victim to the dreaded pop of the knee. Connecting the femur to the tibia, the anterior cruciate ligament (ACL) rupture is one of the most devastating injuries in sports. No other injury has sidelined more athletes for a season or even the rest of a career.

Scientists trace nanoparticles from plants to caterpillars

December 16, 2014 2:37 pm | by Jade Boyd, Rice Univ. | News | Comments

In one of the most comprehensive laboratory studies of its kind, Rice Univ. scientists traced the uptake and accumulation of quantum dot nanoparticles from water to plant roots, plant leaves and leaf-eating caterpillars. The study found that nanoparticle accumulation in both plants and animals varied significantly depending upon the type of surface coating applied to the particles.

Physicists explain puzzling particle collisions

December 11, 2014 8:21 am | News | Comments

An anomaly spotted at the Large Hadron Collider has prompted scientists to reconsider a mathematical description of the underlying physics. By considering two forces that are distinct in everyday life but unified under extreme conditions like those within the collider and just after the birth of the universe, they have simplified one description of the interactions of elementary particles. 

Composite materials can be designed in a supercomputer 'virtual lab'

December 9, 2014 12:45 pm | News | Comments

Scientists have shown how advanced computer simulations can be used to design new composite materials. Nanocomposites, which are widely used in industry, are revolutionary materials in which microscopic particles are dispersed through plastics. 

Nanoparticle allows low-cost creation of 3-D nanostructures

December 8, 2014 7:51 am | by Matt Shipman, News Services, North Carolina State Univ. | News | Comments

Researchers from North Carolina State Univ. have developed a new lithography technique that uses nanoscale spheres to create 3-D structures with biomedical, electronic and photonic applications. The new technique is significantly less expensive than conventional methods and does not rely on stacking 2-D patterns to create 3-D structures.

Atomic “mismatch” creates nano “dumbbells”

December 5, 2014 9:55 am | by Jared Sagoff, Argonne National Laboratory | News | Comments

Like snowflakes, nanoparticles come in a wide variety of shapes and sizes. The geometry of a nanoparticle is often as influential as its chemical makeup in determining how it behaves, from its catalytic properties to its potential as a semiconductor component. Thanks to a new study, researchers are closer to understanding the process by which nanoparticles made of more than one material, called heterostructured nanoparticles, form.

Nanoparticle network could bring fast-charging batteries

December 4, 2014 7:46 am | by Emil Venere, Purdue Univ. | News | Comments

A new electrode design for lithium-ion batteries has been shown to potentially reduce the charging time from hours to minutes by replacing the conventional graphite electrode with a network of tin-oxide nanoparticles. Batteries have two electrodes, called an anode and a cathode. The anodes in most of today's lithium-ion batteries are made of graphite.

Nanoparticles infiltrate, kill cancer cells from within

November 24, 2014 11:06 am | by Melanie Titanic-Schefft, Univ. of Cincinnati | News | Comments

Conventional treatment seeks to eradicate cancer cells by drugs and therapy delivered from outside the cell, which may also affect (and potentially harm) nearby normal cells. In contrast to conventional cancer therapy, a Univ. of Cincinnati team has developed several novel designs for iron-oxide based nanoparticles that detect, diagnose and destroy cancer cells using photo-thermal therapy (PTT).

Spiraling light, nanoparticles and insights into life’s structure

November 20, 2014 8:12 am | by Nicole Casal Moore, Univ. of Michigan | News | Comments

As hands come in left and right versions that are mirror images of each other, so do the amino acids and sugars within us. But unlike hands, only the left-oriented amino acids and the right-oriented sugars ever make into life as we know it. Scientists know the other varieties exist because when they synthesize these amino acids and sugars in a laboratory, roughly equal numbers of left- and right-facing arrangements form.

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