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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.



 



Researchers discover novel exciton interactions in carbon nanotubes

Fri, 23 Feb 2018 09:56:59 EST

Nanotechnology researchers studying small bundles of carbon nanotubes have discovered an optical signature showing excitons bound to a single nanotube are accompanied by excitons tunneling across closely interacting nanotubes. That quantum tunneling action could impact energy distribution in carbon nanotube networks, with implications for light-emitting films and light harvesting applications.



First nanoscale look at how lithium ions navigate a molecular maze to reach battery electrode

Fri, 23 Feb 2018 09:08:14 EST

The lithium-ion batteries that power laptops, electric cars and so many other modern gadgets operate on a simple plan: Lithium ions shuttle back and forth between two electrodes, inserting themselves into one of the electrodes as the battery charges and moving across to the other as the battery drains. The speed and ease of their travel through the battery's liquid electrolyte help determine how fast the battery can charge.



Atomically thin building blocks could make optoelectrical devices more efficient

Fri, 23 Feb 2018 08:03:31 EST

Researchers at Purdue University have developed new heterostructures that could make optoelectrical devices, such as solar panels and sensors, more efficient.



The stiffness of cell plasma membranes affects nanomedicine uptake

Fri, 23 Feb 2018 07:18:56 EST

Nanomedicines need to be taken up by diseased cells in order to release their cargo. Cancer cells have altered membrane properties that hamper their ability to take up nanomedicines. A research team led by Prof. Dr. Prasad Shastri at the University of Freiburg has shown that the stiffness of the cancer cell plasma membrane affects how nanoparticles are internalized, and this process can be enhanced when the cell plasma membrane stiffness is increased. These findings are published in Small.



New staining method enables Nano-CT imaging of tissue samples

Fri, 23 Feb 2018 06:32:22 EST

To date, examining patient tissue samples has meant cutting them into thin slices for histological analysis. This could change, thanks to a new staining method devised by an interdisciplinary team from the Technical University of Munich (TUM). This allows specialists to investigate three-dimensional tissue samples using the nano-CT system also recently developed at TUM.



Researchers show microscopic wood nanocrystals make concrete stronger

Thu, 22 Feb 2018 15:30:37 EST

Purdue University researchers studying whether concrete is made stronger by infusing it with microscopic-sized nanocrystals from wood are moving from the laboratory to the real world with a bridge that will be built in California this spring.



Imaging individual flexible DNA 'building blocks' in 3-D

Thu, 22 Feb 2018 13:11:07 EST

Over the past decade, researchers have been working to create nanoscale materials and devices using DNA as construction materials through a process called "DNA origami."



Zero gravity graphene promises success in space

Thu, 22 Feb 2018 10:22:37 EST

In a series of exciting experiments, Cambridge researchers experienced weightlessness testing graphene's application in space.  



Nanostructured thin-films that can bend light by large angles could be a replacement for bulky glass optical components

Thu, 22 Feb 2018 09:06:26 EST

Surfaces that efficiently redirect the propagation of light have been developed by A*STAR researchers. Ramón Paniagua-Domínguez, working with colleagues from the A*STAR Data Storage Institute and Nanyang Technological University, has invented compact and light-weight optical components that could be integrated into portable optoelectronic devices.



New method uses light and gold nanoparticles for highly targeted, non-invasive drug delivery

Thu, 22 Feb 2018 07:43:03 EST

Over the last century, there has been astounding progress in medical science, leading to the development of efficient, effective medications for treating cancer and a wide variety of other diseases. But the random dispersion of drugs throughout the body often lowers their effectiveness and, even worse, damages healthy tissue. A prime example of this is the use of chemotherapy drugs, which work to block cell division, causing hair loss and bowel issues in cancer patients (hair growth and waste elimination both depend on rapid cell turnover).



Reinventing the inductor

Wed, 21 Feb 2018 17:38:20 EST

A basic building block of modern technology, inductors are everywhere: cellphones, laptops, radios, televisions, cars. And surprisingly, they are essentially the same today as in 1831, when they were first created by English scientist Michael Faraday.



'Memtransistor' brings world closer to brain-like computing

Wed, 21 Feb 2018 17:31:32 EST

Computer algorithms might be performing brain-like functions, such as facial recognition and language translation, but the computers themselves have yet to operate like brains.



Researchers bring high-res magnetic resonance imaging to nanometer scale

Wed, 21 Feb 2018 11:40:19 EST

A new technique that brings magnetic resonance imaging to the nanometer scale with unprecedented resolution will open the door for major advances in understanding new materials, virus particles and proteins that cause diseases like Parkinson's and Alzheimer's. Researchers at the Institute for Quantum Computing at the University of Waterloo used a new type of hardware and numerical algorithms to implement high-precision spin control, which allowed them to image proton spins with a resolution below 2nm.



Spatial structure of bound hole states in black phosphorous

Wed, 21 Feb 2018 08:10:01 EST

NUS chemists have discovered that the bound states of "holes" (the absence of an electron which leads to a net positive charge) in black phosphorus changes from an extended ellipse into a dumbbell shape when it is electrically excited, providing new insights for its use in next generation electronic devices.



Splitting crystals for 2-D metallic conductivity

Wed, 21 Feb 2018 06:33:32 EST

Sheets of electrons that are highly mobile in only two dimensions, known as 2-D electron gas, have unique properties that can be leveraged for faster and novel electronic devices. Researchers have been exploring 2-D electron gas, which was only discovered in 2004, to see how it can be used in superconductors, actuators and electronic memory devices, among others.



A tapering silicon hole could lead to better drug testing

Wed, 21 Feb 2018 06:32:35 EST

Tohoku University researchers have improved on currently available methods for screening drugs for heart-related side effects.



When proteins shake hands

Wed, 21 Feb 2018 05:14:25 EST

Protein fibres are found virtually everywhere in nature, including in spider silk, wood, the spaces between tissue cells, in tendons, or as a natural sealant for small wounds. These protein nanofibres have outstanding properties such as high stability, biodegradability, and antibacterial effects. Artificially creating these fibres is not easy, much less assigning them specific functions. These issues are discussed by materials scientists from Friedrich Schiller University Jena (Germany) in the latest issue of ACS Nano.



Researchers achieve 'Olympic ring' molecule breakthrough just in time for Winter Games

Tue, 20 Feb 2018 11:59:38 EST

As the world's premier winter athletes were preparing to take to the slopes, rinks and tracks for the 2018 Olympic Winter Games, Florida State University researchers were hard at work making a gold-medal discovery of their own.



Thin films of perovskite oxides hold promise for writing data at terahertz frequency

Tue, 20 Feb 2018 10:38:50 EST

Electronics could work faster if they could read and write data at terahertz frequency, rather than at a few gigahertz. Creating such devices would be eased with materials that can undergo a huge change in how easily they conducted electricity in response to a magnetic field at room temperature. Scientists believe thin films of perovskite oxides hold promise for such uses. However, such behavior has never been seen at these frequencies in these films. Until now. Via terahertz pulses, scientists at Center for Integrated Nanotechnologies and the United Kingdom discovered colossal changes in electricity's flow at the desired frequencies and temperature.



Activating the dark side reveals brighter nano 'building blocks'

Tue, 20 Feb 2018 07:56:40 EST

Scientists working to make nanoparticles even smaller, whilst retaining their useful optical properties, believe they have discovered a way to overcome a fundamental physical restraint known as "thermal quenching".



Researchers invent tiny, light-powered wires to modulate brain's electrical signals

Tue, 20 Feb 2018 07:22:46 EST

The human brain largely remains a black box: How the network of fast-moving electrical signals turns into thought, movement and disease remains poorly understood. But it is electrical, so it can be hacked—the question is finding a precise, easy way to manipulate electrical signaling between neurons.



Many colours from a single dot

Mon, 19 Feb 2018 08:35:19 EST

Physicists Bart van Dam and Katerina Newell (Dohnalova) from the UvA Institute of Physics, in collaboration with Emanuele Marino and Peter Schall as well as colleagues from the University of Twente and Jiljin University in China, have shown that a single nanoparticle can be used to emit different colours of light. Their results, which were published in the nano- and microphysics journal Small, show that the particles under consideration may be a very efficient and versatile tool to produce light of all colours at tiny scales.



Researchers invent light-emitting nanoantennas

Mon, 19 Feb 2018 07:54:05 EST

Scientists from ITMO University have developed effective nanoscale light sources based on halide perovskite. Such nanosources are based on subwavelength nanoparticles serving both as emitters and nanoantennas and allow enhancing light emission inherently without additional devices. Moreover, perovskite enables tuning of emission spectra throughout the visible range by varying the composition of the material. This makes the new nanoparticles a promising platform for creating compact optoelectronic devices such as optical chips, light-emitting diodes, or sensors. The results were published in Nano Letters.



Team develos new process for manufacturing SWCNT films

Mon, 19 Feb 2018 07:53:41 EST

In a finding that could accelerate the development of next-generation wearable and flexible electronics, a team of Skoltech scientists led by Professor Albert Nasibulin has discovered a revolutionary means of improving the optical and electrical properties of carbon nanotubes.



Contacting the molecular world through graphene nanoribbons

Mon, 19 Feb 2018 05:52:01 EST

A single molecule can behave as the smallest electronic component of an electronic system. Researchers in the field of molecular electronics have endeavoured in recent years to develop new approaches to using molecules as electronic logic components.



Researchers create first superatomic 2-D semiconductor

Fri, 16 Feb 2018 09:30:02 EST

Atoms are the basic building blocks of all matter—at least, that is the conventional picture. In a new study, researchers have fabricated the first superatomic 2-D semiconductor, a material whose basic units aren't atoms but superatoms—atomic clusters that exhibit some of the properties of one or more individual atoms. The researchers expect that the new material is just the first member of what will become a new family of 2-D semiconductors whose superatomic structures will greatly expand the diversity, functionality, and applications of 2-D materials.



To untangle the effects of nanoparticles on microbes, look at the genes

Fri, 16 Feb 2018 06:32:00 EST

The environment is teeming with microbes. Soil, water, indoor surfaces, our own bodies—any habitat that hasn't been rigorously sterilized is populated by thousands of species of interdependent bacteria, viruses, and other microscopic organisms.



A new method for detecting levels of an important amino acid

Fri, 16 Feb 2018 06:07:56 EST

A team from the Faculty of Chemistry of MSU and colleagues have suggested a new method for determining levels of cysteine, an amino acid used in many drugs, with the help of gold nanoparticles. Unlike current methods, it does not require complex reactions or expensive equipment. An article with the results of the study was published in Sensors and Actuators B.



Scientists develop biocompatible anti-burn nanofibers that act as 'living bandages'

Fri, 16 Feb 2018 05:20:15 EST

A group of NUST MISIS's young scientists has presented a new therapeutic material based on nanofibers made of polycaprolactone modified with a thin-film antibacterial composition and plasma components of human blood. Biodegradable bandages made from these fibers will accelerate the growth of tissue cells twice as quickly, contributing to the normal regeneration of damaged tissues, as well as preventing the formation of scars in cases of severe burns.



Nanoparticles act as surgical blades for improved dental surgery

Thu, 15 Feb 2018 09:30:01 EST

Currently, more than 80 nanotechnologies have been approved for a variety of medical applications, from treating cancer to bioimaging to tissue remodeling.