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Nanotechnology News - Nanoscience, Nanotechnolgy, Nanotech News



Phys.org provides the latest news on nanotechnology, nanoscience, nanoelectronics, science and technology. Updated Daily.



 



World-first images of electric currents in graphene released

Wed, 26 Apr 2017 14:00:02 EDT

Researchers at the University of Melbourne are the first in the world to image how electrons move in two-dimensional graphene, a boost to the development of next-generation electronics.



Nanoparticles can travel from lungs to blood, possibly explaining risks to heart

Wed, 26 Apr 2017 08:23:29 EDT

Tiny particles in air pollution have been associated with cardiovascular disease, which can lead to premature death. But how particles inhaled into the lungs can affect blood vessels and the heart has remained a mystery. Now, scientists have found evidence in human and animal studies that inhaled nanoparticles can travel from the lungs into the bloodstream, potentially explaining the link between air pollution and cardiovascular disease. Their results appear in the journal ACS Nano.



Researchers build a single-molecule diode

Wed, 26 Apr 2017 06:28:33 EDT

Researchers of the University of Barcelona have led a project to create a diode out of a 1 nm-sized single molecule with high rectification ratios. Diodes, commonly used in in everyday electronic devices, allow current to flow in one direction while blocking the current in the opposite direction.



Nanodiamond-enhanced MRI offers greater range of diagnostic and therapeutic applications

Wed, 26 Apr 2017 05:00:03 EDT

Nanodiamonds - synthetic industrial diamonds only a few nanometers in size - have recently attracted considerable attention because of the potential they offer for the targeted delivery of vaccines and cancer drugs and for other uses. Thus far, options for imaging nanodiamonds have been limited. Now a team of investigators based at the Athinoula A. Martinos Center for Biomedical Imaging at Massachusetts General Hospital has devised a means of tracking nanodiamonds noninvasively with magnetic resonance imaging (MRI), opening up a host of new applications. They report their findings today in the online journal Nature Communications.



A novel form of iron for fortification of foods

Tue, 25 Apr 2017 07:08:28 EDT

Whey protein nanofibrils loaded with iron nanoparticles: ETH researchers are developing a new and highly effective way of fortifying iron into food and drinks.



Research comes through with flying colors

Tue, 25 Apr 2017 07:00:04 EDT

Like a chameleon changing colors to blend into the environment, Lawrence Livermore researchers have created a technique to change the color of assembled nanoparticles with an electrical stimulant.



Nano-notch sends self-assembling polymers into a spiral

Tue, 25 Apr 2017 06:45:44 EDT

A simple circular or hexagonal pit written into silicon can be used to generate self-assembling polymer spirals thanks to the addition of a tiny notch in the template, report scientists in the launch issue of Nano Futures.



Nanoparticle vaccine shows potential as immunotherapy to fight multiple cancer types

Mon, 24 Apr 2017 11:33:34 EDT

Researchers from UT Southwestern Medical Center have developed a first-of-its-kind nanoparticle vaccine immunotherapy that targets several different cancer types.



Self-assembled nanostructures can be selectively controlled

Mon, 24 Apr 2017 10:22:47 EDT

Plasmonic nanoparticles exhibit properties based on their geometries and relative positions. Researchers have now developed an easy way to manipulate the optical properties of plasmonic nanostructures that strongly depend on their spatial arrangement.



Freezing lithium batteries may make them safer and bendable

Mon, 24 Apr 2017 09:58:10 EDT

Yuan Yang, assistant professor of materials science and engineering at Columbia Engineering, has developed a new method that could lead to lithium batteries that are safer, have longer battery life, and are bendable, providing new possibilities such as flexible smartphones. His new technique uses ice-templating to control the structure of the solid electrolyte for lithium batteries that are used in portable electronics, electric vehicles, and grid-level energy storage. The study is published online April 24 in Nano Letters.



Graphene holds up under high pressure

Mon, 24 Apr 2017 06:10:04 EDT

A single sheet of graphene, comprising an atom-thin lattice of carbon, may seem rather fragile. But engineers at MIT have found that the ultrathin material is exceptionally sturdy, remaining intact under applied pressures of at least 100 bars. That's equivalent to about 20 times the pressure produced by a typical kitchen faucet.



Wonder material? Novel nanotube structure strengthens thin films for flexible electronics

Fri, 21 Apr 2017 18:17:30 EDT

Reflecting the structure of composites found in nature and the ancient world, researchers at the University of Illinois at Urbana-Champaign have synthesized thin carbon nanotube (CNT) textiles that exhibit both high electrical conductivity and a level of toughness that is about fifty times higher than copper films, currently used in electronics.



Electrochemical performance of lithium-ion capacitors using pre-lithiated multiwalled carbon nanotubes as anode

Fri, 21 Apr 2017 09:57:08 EDT

How do internal short circuit? Researcher Minho Kim has published his paper "A fast and efficient pre-doping approach to high energy density lithium-ion hybrid capacitors".



Controlling electrons in graphene opens a new path to potential electronic devices

Fri, 21 Apr 2017 08:40:02 EDT

For the first time, scientists created a tunable artificial atom in graphene. They demonstrated that a vacancy in graphene can be charged in a controllable way such that electrons can be localized to mimic the electron orbitals of an artificial atom. Importantly, the trapping mechanism is reversible (turned on and off) and the energy levels can be tuned.



3-D models of multilayered structures on engineering scale from nanoscale damage profiles

Thu, 20 Apr 2017 07:10:01 EDT

Computer modelling of nano-indentation studies performed on ion-irradiated steels has generated 3-D stress-field maps on an engineering scale that agree well with experimental results.



Graphene 'copy machine' may produce cheap semiconductor wafers

Wed, 19 Apr 2017 13:00:02 EDT

In 2016, annual global semiconductor sales reached their highest-ever point, at $339 billion worldwide. In that same year, the semiconductor industry spent about $7.2 billion worldwide on wafers that serve as the substrates for microelectronics components, which can be turned into transistors, light-emitting diodes, and other electronic and photonic devices.



Graphene and gold make a better brain probe

Wed, 19 Apr 2017 09:57:44 EDT

A team from Korea created more flexible neural electrodes that minimize tissue damage and still transmit clear brain signals.



A new method developed for measuring carbon nanotubes

Wed, 19 Apr 2017 09:38:02 EDT

With this method can be measured e.g. the number of single walled carbon nanotubes and their concentration in a carbon nanotube layer.



Nanoparticles remain unpredictable

Wed, 19 Apr 2017 07:51:07 EDT

The way that nanoparticles behave in the environment is extremely complex. There is currently a lack of systematic experimental data to help understand them comprehensively, as ETH environmental scientists have shown in a large overview study. A more standardised approach would help to advance the research field.



New technique colors biomolecules in tissue

Wed, 19 Apr 2017 06:58:34 EDT

An extra detector on an electron microscope can help determine which molecules are found in which parts of a cell. This is what scientists at the UMCG and Delft University of Technology report in an article published today in the journal Scientific Reports. "This detector enables us to assign a colour to molecules in a cell," says Ben Giepmans, the team leader from Groningen. "Multicolour electron microscopes are a new addition to medical research, and they could generate interesting results."



Better living through pressure—functional nanomaterials made easy

Tue, 18 Apr 2017 09:17:52 EDT

Using pressure instead of chemicals, a Sandia National Laboratories team has fabricated nanoparticles into nanowire-array structures similar to those that underlie the surfaces of touch-screens for sensors, computers, phones and TVs. The pressure-based fabrication process takes nanoseconds. Chemistry-based industrial techniques take hours.



Nano-SPEARs gently measure electrical signals in small animals

Mon, 17 Apr 2017 11:41:15 EDT

Microscopic probes developed at Rice University have simplified the process of measuring electrical activity in individual cells of small living animals. The technique allows a single animal like a worm to be tested again and again and could revolutionize data-gathering for disease characterization and drug interactions.



Engineers invent method to control light propagation in waveguides

Mon, 17 Apr 2017 11:00:11 EDT

A team of Columbia Engineering researchers, led by Applied Physics Assistant Professor Nanfang Yu, has invented a method to control light propagating in confined pathways, or waveguides, with high efficiency by using nano-antennas. To demonstrate this technique, they built photonic integrated devices that not only had record-small footprints but were also able to maintain optimal performance over an unprecedented broad wavelength range.



Nanoparticles reprogram immune cells to fight cancer

Mon, 17 Apr 2017 11:00:04 EDT

Researchers at Fred Hutchinson Cancer Research Center have developed biodegradable nanoparticles that can be used to genetically program immune cells to recognize and destroy cancer cells—while the immune cells are still inside the body.



Nuclease-resistant hybrid nanoflowers

Mon, 17 Apr 2017 08:55:24 EDT

An eco-friendly method to synthesize DNA-copper nanoflowers with high load efficiencies, low cytotoxicity, and strong resistance against nucleases has been developed by Professor Hyun Gyu Park in the Department of Chemical and Biomolecular Engineering and his collaborators.



Sperm tested as possible candidate for delivering cancer medications in female patients

Fri, 14 Apr 2017 08:40:01 EDT

(Phys.org)—A team of researchers with the Institute for Integrative Nanosciences in Germany has tested the possibility of using sperm cells to deliver drugs to cancerous tumors in female patients. In their paper uploaded to the preprint server arXiv, the group describes how such a technique might work, their initial test results and what they learned from their experiments.



Physicists image individual molecules by watching them absorb light

Fri, 14 Apr 2017 08:00:02 EDT

What do ships, bats and torpedoes have in common? They navigate by emitting sound waves and listening where those get absorbed or reflected. Humans do the same with light waves, except that they rely on external sources like the sun for the original emission. However when looking at something as small as a single molecule this becomes problematic, as light waves, not to mention sound waves, are bigger than the object itself.



Ultrathin semiconducting sheet showing gas-responsive electronic properties for highly sensitive gas sensors

Fri, 14 Apr 2017 07:50:02 EDT

Gas detectors capable of sensing minute quantities of pollutants could help better monitor air quality. Saudi Arabia's King Abdullah University of Science and Technology (KAUST) researchers have discovered a two-dimensional electronic material that exhibits high sensitivity to gas molecules, such as carbon dioxide (CO2), nitrogen oxides (NOx) and ammonia (NH3).



Nano-sized sensors provide unprecedented data on how heat diffuses in and out of living cells

Fri, 14 Apr 2017 07:40:02 EDT

Tiny flat sensors that stick to the surface of living cells can provide detailed measurements of heat transfer at the cell surface. Developed at King Abdullah University of Science and Technology (KAUST), Saudi Arabia, these new sensors resolve some of the practical challenges of working with these tiny cells as well as enable novel diagnostic techniques.



Nanotubes that build themselves

Thu, 13 Apr 2017 10:17:52 EDT

Researchers from Lund University in Sweden have succeeded in producing nanotubes from a single building block using so-called molecular self-recognition. The tube can also change shape depending on the surrounding environment. The results can contribute to the future development of transport channels for drugs through the cell membrane.