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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.



 



Assembly of nanoparticles proceeds like a zipper

Fri, 22 Sep 2017 09:00:02 EDT

It has always been the Holy Grail of materials science to describe and control the material's structure-function relationship. Nanoparticles are an attractive class of components to be used in functional materials because they exhibit size-dependent properties, such as superparamagnetism and plasmonic absorption of light. Furthermore, controlling the arrangement of nanoparticles can result in unforeseen properties, but such studies are hard to carry out due to limited efficient approaches to produce well-defined three-dimensional nanostructures.



A new way to enhance the capacity of memory devices

Fri, 22 Sep 2017 08:14:05 EDT

A Tomsk Polytechnic University study reveals how topological vortices found in low-dimensional materials can be both displaced and erased and restored again by the electrical field within nanoparticles. This may open exciting opportunities for memory devices or quantum computers in which information will be encrypted in the characteristics of topological vortices.



Honey: a cost-effective, non-toxic substitute for graphene manipulation

Fri, 22 Sep 2017 05:16:31 EDT

Dr. Richard Ordonez, a nanomaterials scientist at the Space and Naval Warfare Systems Center Pacific (SSC Pacific), was having stomach pains last year. So begins the story of the accidental discovery that honey—yes, the bee byproduct—is an effective, non-toxic substitute for the manipulation of the current and voltage characteristics of graphene.



Four elements make 2-D optical platform

Thu, 21 Sep 2017 07:30:15 EDT

Rice University scientists have discovered a two-dimensional alloy with an optical bandgap that can be tuned by the temperature used to grow it.



Straining the memory: Prototype strain engineered materials are the future of data storage

Thu, 21 Sep 2017 05:52:34 EDT

Researchers from the Singapore University of Technology and Design (SUTD) and Shanghai Institute of Microsystems and Information Technology have nano-engineered a superlattice data storage material. Data is recorded at the interfaces of the superlattice layers. When the atoms at the interface are disordered, the material has a high electrical resistance while the ordered interface has a low electrical resistance. Only the interface switches, a subset of layers within the material, can remain unchanged and crystalline. This means that the interface can be engineered by the non-switching layers—the entire structure need not switch into a disordered state. This makes the superlattice very different to unstructured phase change memory alloys, such as the Ge2Sb2Te5 alloy.



Scientists create world's first 'molecular robot' capable of building molecules

Wed, 20 Sep 2017 13:00:27 EDT

Scientists at The University of Manchester have created the world's first 'molecular robot' that is capable of performing basic tasks including building other molecules.



Scientists make atoms-thick Post-It notes for solar cells and circuits

Wed, 20 Sep 2017 13:00:24 EDT

Over the past half-century, scientists have shaved silicon films down to just a wisp of atoms in pursuit of smaller, faster electronics. For the next set of breakthroughs, though, they'll need novel ways to build even tinier and more powerful devices.



New microscope technology gives researchers a detailed look at structure and composition of materials

Wed, 20 Sep 2017 10:00:34 EDT

At their core, electron microscopes work a lot like a movie projectors. A high-powered beam passes through a material and it projects something—usually something we really want to see—onto a screen on the other side. With most electron microscopes, however, capturing data is like trying to project a movie onto a dirty screen that is too small to see the whole projection. But a new camera technology, tested by researchers at Drexel University, is enabling the microscopes to present a clearer, more complete and detailed look at their featured presentation.



Nanoscale printing breakthrough creates two colours per pixel

Wed, 20 Sep 2017 09:18:02 EDT

Scientists have developed a new form of high-resolution 'printing' which could have wide-ranging applications in data storage, anti-counterfeiting measures, and digital imaging.



Getting to the heart of the matter: Nanogels for heart attack patients

Wed, 20 Sep 2017 08:00:07 EDT

Heart disease and heart-related illnesses are a leading cause of death around the world, but treatment options are limited. Now, one group reports in ACS Nano that encapsulating stem cells in a nanogel could help repair damage to the heart.



Novel strategy for chirality controlled synthesis of single-walled carbon nanotubes

Tue, 19 Sep 2017 10:37:54 EDT

Researchers at Tohoku University have developed a novel strategy for controlling chirality of single-walled carbon nanotubes (SWNTs). By using this approach, preferential synthesis of (6,4) SWNTs has been realized for the first time. The unique growth mechanism has been elucidated through comparing experiments and theoretical calculations made with a researcher from the University of Tokyo.



Copying nature's lock-and-key system could improve rapid medical diagnostics

Tue, 19 Sep 2017 09:31:22 EDT

Researchers have designed a system that rapidly recognises the specific biological molecules that can indicate disease.



Researchers produce first 2-D field-effect transistor made of a single material

Tue, 19 Sep 2017 05:59:30 EDT

Modern life would be almost unthinkable without transistors. They are the ubiquitous building blocks of all electronic devices, and each computer chip contains billions of them. However, as the chips become increasingly small, the current 3-D field-electronic transistors (FETs) are reaching their efficiency limit. A research team at the Institute for Basic Science (IBS) has developed the first 2-D electronic circuit (FET) made of a single material. Published in Nature Nanotechnology, this study shows a new method to make metallic and semiconducting polymorphs from the same material in order to manufacture 2-D FETs.



Graphene and other carbon nanomaterials can replace scarce metals

Tue, 19 Sep 2017 02:28:41 EDT

Scarce metals are found in a wide range of everyday objects around us. They are complicated to extract, difficult to recycle and so rare that several of them have become "conflict minerals" which can promote conflicts and oppression. A survey at Chalmers University of Technology now shows that there are potential technology-based solutions that can replace many of the metals with carbon nanomaterials, such as graphene.



Blood testing via sound waves may replace some tissue biopsies

Mon, 18 Sep 2017 15:00:12 EDT

Cells secrete nanoscale packets called exosomes that carry important messages from one part of the body to another. Scientists from MIT and other institutions have now devised a way to intercept these messages, which could be used to diagnose problems such as cancer or fetal abnormalities.



New quantum phenomena in graphene superlattices

Mon, 18 Sep 2017 12:16:10 EDT

A team of Graphene Flagship researchers led by the University of Manchester reported in the journal Science showing the first new type of quantum oscillation to be reported for thirty years. This occurs by applying a magnetic field and it is the first of its kind to be present at high temperature and on the mesoscale. This research also sheds light on the Hofstadter butterfly phenomenon.



Microneedle skin patch that delivers fat-shrinking drug locally could be used to treat obesity and diabetes

Fri, 15 Sep 2017 09:20:45 EDT

Researchers have devised a medicated skin patch that can turn energy-storing white fat into energy-burning brown fat locally while raising the body's overall metabolism. The patch could be used to burn off pockets of unwanted fat such as "love handles" and treat metabolic disorders like obesity and diabetes, according to researchers at Columbia University Medical Center (CUMC) and the University of North Carolina.



The key to ultrathin high-efficiency sensors and solar cells could be materials covered with tiny trenches

Fri, 15 Sep 2017 07:30:03 EDT

Future ultrathin solar cells and light sources could have their surfaces covered by tiny trenches, after A*STAR researchers found such structures enhance efficiency by four orders of magnitude.



A DNA nanorobot is programmed to pick up and sort molecules into predefined regions

Thu, 14 Sep 2017 14:00:07 EDT

Imagine a robot that could help you tidy your home: roving about, sorting stray socks into the laundry and dirty dishes into the dishwasher. While such a practical helper may still be the stuff of science fiction, Caltech scientists have developed an autonomous molecular machine that can perform similar tasks—at the nanoscale. This "robot," made of a single strand of DNA, can autonomously "walk" around a surface, pick up certain molecules and drop them off in designated locations.



Filtering molecules from the water or air with nanomembranes

Thu, 14 Sep 2017 10:56:17 EDT

Free-standing carbon membranes that are a millionth of a millimetre thin: these are a special research field of Professor Dr. Armin Gölzhäuser from Bielefeld University and his research group. The nanomembranes can serve as ultrafine filters and as a protective layer. The Bielefeld physicists have registered several patents for manufacturing such molecular foils. In their research, they are analysing which properties the nanomembranes possess - as a basis for future applications. In a new film produced by Bielefeld University's 'research_tv', Armin Gölzhäuser explains what makes the membranes such multi-talents and assesses how significant they may become for the purification of water.



New study on graphene-wrapped nanocrystals makes inroads toward next-gen fuel cells

Thu, 14 Sep 2017 08:00:06 EDT

A powdery mix of metal nanocrystals wrapped in single-layer sheets of carbon atoms, developed at the Department of Energy's Lawrence Berkeley National Laboratory (Berkeley Lab), shows promise for safely storing hydrogen for use with fuel cells for passenger vehicles and other uses. And now, a new study provides insight into the atomic details of the crystals' ultrathin coating and how it serves as selective shielding while enhancing their performance in hydrogen storage.



Test strips for cancer detection get upgraded with nanoparticle bling

Wed, 13 Sep 2017 12:45:15 EDT

The most common test strip people might think of for diagnosis is a home pregnancy test. Pregnant women have steadily increasing levels of the biomarker human chorionic gonadotropin (hCG), which is easily detectable in urine and a thin, colorful strip of antibodies will appear when hCG is present.



Multifunctional nano-sized drug carriers based on reactive polypept(o)ides

Wed, 13 Sep 2017 08:41:33 EDT

Nano-sized carrier systems have medical application in improving pharmacologic properties of bioactive agents. For many therapeutic approaches, it is important that the carrier system can stably incorporate the cargo during circulation without inducing aggregation, while cargo should ideally only be released after successful cellular uptake. These requirements have thus far only been met by chemistry approaches with nanoparticles that are difficult to characterize. Consequently, clinical translation of these systems has been very difficult to achieve.



Bringing atomic mapping to the mainstream

Wed, 13 Sep 2017 07:00:04 EDT

Mapping the internal atomic structure of small particles just got easier thanks to a new computer algorithm and graphical user interface (GUI) developed by scientists at and Lawrence Berkeley National Laboratory (Berkeley Lab) and University of California, Los Angeles.



New technique lets doctors predict disease severity

Tue, 12 Sep 2017 12:25:29 EDT

An international team of researchers has found a way to diagnose disease and predict patient outcomes simply by measuring unbelievably small changes in interactions between molecules inside the body. The simple new technique could offer vastly superior predictions of disease severity in a huge range of conditions with a genetic component, such as Alzheimer's, autism, cancer, cardiovascular disease, diabetes, obesity, schizophrenia and depression.



Graphene based terahertz absorbers

Tue, 12 Sep 2017 08:48:01 EDT

Graphene Flagship researches from CNR-Istituto Nanoscienze, Italy and the University of Cambridge, UK have shown that it is possible to create a terahertz saturable absorber using graphene produced by liquid phase exfoliation and deposited by transfer coating and ink jet printing. The paper, published in Nature Communications, reports a terahertz saturable absorber with an order of magnitude higher absorption modulation than other devices produced to date.



Sensor awakens only in the presence of a signal of interest

Tue, 12 Sep 2017 07:36:14 EDT

Here's your task. Build a tiny sensor that detects a signature of infrared (IR) wavelengths characteristic of a hot tailpipe, a wood fire, or perhaps even a human being. Design the sensor so that it can remain dormant and unattended but always alert, even for years, without drawing on battery power. And build the sensor so that the act of detection itself can initiate the emission of a signal that alerts warfighters, firefighters, or others that a "signal-of-interest" has been detected. It's just the sort of intelligence, reconnaissance, and surveillance (ISR) technology that can increase situational awareness while minimizing the need for potentially dangerous maintenance missions to replace run-down batteries.



Nanoparticles from tattoos circulate inside the body, study finds

Tue, 12 Sep 2017 05:50:03 EDT

The elements that make up the ink in tattoos travel inside the body in micro and nanoparticle forms and reach the lymph nodes, according to a study published in Scientific Reports on 12 September by scientists from Germany and the ESRF, the European Synchrotron, Grenoble (France). It is the first time researchers have found analytical evidence of the transport of organic and inorganic pigments and toxic element impurities as well as in depth characterization of the pigments ex vivo in tattooed tissues. Two ESRF beamlines were crucial in this breakthrough.



To improve health monitoring, simply trip the 'nanoswitch'

Mon, 11 Sep 2017 15:00:06 EDT

Engineered strands of DNA—nanoscale tools called "nanoswitches"—could be the key to faster, easier, cheaper and more sensitive tests that can enable high-fidelity detection of biomarkers indicating the presence of different diseases, viral strains and even genetic variabilities as subtle as a single-gene mutation.



A novel and practical fab-route for superomniphobic liquid-free surfaces

Mon, 11 Sep 2017 12:16:02 EDT

A joint research team led by Professor Hee Tak Kim and Shin-Hyun Kim in the Department of Chemical and Biomolecular Engineering at KAIST developed a fabrication technology that can inexpensively produce surfaces capable of repelling liquids, including water and oil.