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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.



 



Scientists find that mechanical behavior of tiny structures is affected by atomic defects

Wed, 28 Sep 2016 13:03:41 EDT

An international team of scientists with participation from the University of Göttingen, the Indian Institute of Science, Bangalore, Pennsylvania State University, and Wright State University has measured the mechanics of tiny crystalline ceramics. Materials are made of atoms, and if they are arranged periodically, they are called crystalline structures. If the size of these crystalline structures is 1,000 times smaller than a single human hair diameter, then they are called nano-structures such as nano-rods, nano-wires, nano-ribbons, nano-belts etc. In some cases, special atomic arrangements enable them to convert mechanical energy into electrical energy. These materials are called piezoelectric materials. They are useful for energy harvesting as well as a variety of electro-mechanical gadgets to enhance the quality of life. Hence, it is important to have a grip on these nano-structures and measure their mechanical responses. Until now, it was unknown that mechanical behavior of piezoelectric nano-crystals containing atomic defects is different than pure. This recent study is reported in the journal Nano Letters.



Travelling through the body with graphene

Wed, 28 Sep 2016 12:37:32 EDT

For the first time researchers succeeded to place a layer of graphene on top of a stable fatty lipid monolayer. Surrounded by a protective shell of lipids graphene could enter the body and function as a versatile sensor. The results are the first step towards such a shell, and have been published in the journal Nanoscale on 28 September 2016.



Team suggests nanoscale electronic motion sensor as DNA sequencer

Wed, 28 Sep 2016 09:13:09 EDT

Researchers from the National Institute of Standards and Technology (NIST) and collaborators have proposed a design for the first DNA sequencer based on an electronic nanosensor that can detect tiny motions as small as a single atom.



Nanotech could give us safer, greener diapers and sanitary products

Tue, 27 Sep 2016 10:06:37 EDT

A new material made of tiny nanofibers could replace potentially harmful materials found in diapers and sanitary products, according to new research published in Applied Materials Today.



Nanoparticles called C dots show ability to induce cell death in tumors

Tue, 27 Sep 2016 07:55:16 EDT

Nanoparticles known as Cornell dots, or C dots, have shown great promise as a therapeutic tool in the detection and treatment of cancer.



Researchers design wearable microscope that can measure fluorescent dyes through skin

Tue, 27 Sep 2016 06:45:58 EDT

UCLA researchers working with a team at Verily Life Sciences have designed a mobile microscope that can detect and monitor fluorescent biomarkers inside the skin with a high level of sensitivity, an important tool in tracking various biochemical reactions for medical diagnostics and therapy.



Researchers show that bending semiconductors generates electricity

Tue, 27 Sep 2016 06:20:46 EDT

Some materials can generate a small voltage when bent and, conversely, can bend in response to a voltage. This phenomenon is called flexoelectricity, and until now, it was thought that the effect only existed in electrical insulators (materials that do not conduct electricity). However, a research team from the Institut Català de Nanociència i Nanotecnologia (ICN2) in Barcelona reports today in an article in Nature that flexoelectric-like effects are more ubiquitous than previously thought. The ICN2 researchers report that semiconductors, which can be thought of as halfway between electrical insulators and actual metals, also generate electricity in response to bending.



Iron nanoparticles make immune cells attack cancer

Mon, 26 Sep 2016 17:22:00 EDT

Stanford researchers accidentally discovered that iron nanoparticles invented for anemia treatment have another use: triggering the immune system's ability to destroy tumor cells.



Nanoparticle injections may be future of osteoarthritis treatment

Mon, 26 Sep 2016 14:50:01 EDT

Osteoarthritis is a debilitating condition that affects at least 27 million people in the United States, and at least 12 percent of osteoarthritis cases stem from earlier injuries. Over-the-counter painkillers, such as anti-inflammatory drugs, help reduce pain but do not stop unrelenting cartilage destruction. Consequently, pain related to the condition only gets worse.



Single photon light emitting diodes for on-chip integration

Mon, 26 Sep 2016 12:33:16 EDT

Researchers from the Graphene Flagship use layered materials to create an all-electrical quantum light emitting diodes (LED) with single-photon emission. These LEDs have potential as on-chip photon sources in quantum information applications.



3-D nanoprinting to turbocharge microscopes

Mon, 26 Sep 2016 06:56:46 EDT

EPFL researchers have printed nanometric-scale sensors capable of improving the performance of atomic force microscopes.



Scientists find twisting 3-D raceway for electrons in nanoscale crystal slices

Fri, 23 Sep 2016 14:11:49 EDT

Researchers have created an exotic 3-D racetrack for electrons in ultrathin slices of a nanomaterial they fabricated at the Department of Energy's Lawrence Berkeley National Laboratory (Berkeley Lab).



New analysis finds way to safely conduct heat from graphene to biological tissues

Fri, 23 Sep 2016 09:10:42 EDT

In the future, our health may be monitored and maintained by tiny sensors and drug dispensers, deployed within the body and made from graphene—one of the strongest, lightest materials in the world. Graphene is composed of a single sheet of carbon atoms, linked together like razor-thin chicken wire, and its properties may be tuned in countless ways, making it a versatile material for tiny, next-generation implants.



Self-assembled nanostructures hit their target

Fri, 23 Sep 2016 07:40:01 EDT

A tiny therapeutic delivery system that can control the body's ability to manufacture proteins has been developed by Saudi Arabia's King Abdullah University of Science and Technology (KAUST) researchers.



Scientists purify copper nanowires

Fri, 23 Sep 2016 07:00:03 EDT

Cell phones and Apple watches could last a little longer due to a new method to create copper nanowires.



Chains of nanogold – forged with atomic precision

Thu, 22 Sep 2016 09:03:21 EDT

Researchers at Nanoscience Center of University of Jyväskylä in Finland have succeeded in producing short chains and rings of gold nanoparticles with unprecedented precision. They used a special kind of nanoparticles with a well-defined structure and linked them together with molecular bridges. These structures – being practically huge molecules – allow extremely accurate studies of light–matter interaction in metallic nanostructures and plasmonics. This research was funded by the Academy of Finland.



Combining the elements palladium and ruthenium for industry

Thu, 22 Sep 2016 08:00:12 EDT

The chemical elements palladium (Pd) and ruthenium (Ru) are both used separately in the chemical industry. For a long time, researchers have thought that combining the two could lead to improved and novel properties for industrial applications. However, the two elements do not readily mix together to become a single material.



Defects at the spinterface disrupt transmission

Wed, 21 Sep 2016 09:44:48 EDT

Magnets made of organic materials have a number of advantages over the classic metal or alloy magnets. They are chemically more flexible, cheaper to make, and can be better adapted to various purposes and varying designs. In practice, researchers want to apply both types of magnets in electronics – in spintronic elements, which transport information not by electrical load but via the spin of the component molecules. This intrinsic angular momentum is a typical characteristic of particles, such as electrons. Reza Kakavandi, Professor Thomas Chassé and Dr. Benedetta Casu of the Institute of Physical Chemistry at the University of Tübingen have investigated just such a magnetic interface between the titanium oxide crystals in rutile form and a purely organic magnet. They found that the transition area where the materials met was highly sensitive to minimal defects in the surfaces.



Stem cell research could lead to treatment breakthroughs

Wed, 21 Sep 2016 09:10:02 EDT

Scientists have discovered a new way to replicate the regenerative power of stem cells in the lab, which could lead to powerful treatments for injuries and diseases.



Surface-patterned colloidal particles

Wed, 21 Sep 2016 09:00:03 EDT

(Phys.org)—A group of researchers from several institutions have attached thiol-terminated polymers to gold nanoparticles and created surface micelles by changing the solvent from one that is favorable for the polymer to one that is less favorable.



More precise measurements of phosphorene suggest it has advantages over other 2-D materials

Wed, 21 Sep 2016 08:30:02 EDT

(Phys.org)—A large team of researchers from China, the U.S. and Japan has developed a more precise means for measuring the various band gaps in layered phosphorene, and in so doing, have found that it possesses advantages over other 2-D materials. In their paper published in the journal Nature Nanotechnology, the group describes their technique and what they observed during their measurements.



Multi stimuli-responsive nanocapsules selectively deliver drugs to exactly where they are needed

Wed, 21 Sep 2016 07:30:01 EDT

A nanoparticle-based drug delivery system that can sense and respond to different conditions in the body, as well as to an externally applied magnetic field, could enhance doctors' ability to target drugs to specific sites of disease.



Receptor tyrosine kinases control mechanosensors

Wed, 21 Sep 2016 07:20:05 EDT

Researchers at the Mechanobiology Institute (MBI) at the National University of Singapore (NUS) have identified a role of receptor tyrosine kinases in the regulation of the cellular mechanosensory machinery, which has relevance for understanding the basis of cancerous growth and developmental abnormalities. The work was published in Nano Letters in August 2016.



The pursuit of microscopic drugs that can be tracked as they fight cancer

Wed, 21 Sep 2016 07:20:02 EDT

Microscopic drug molecules could soon be sent into the body to fight disease and their journey tracked using photo-acoustic imaging, after researchers developed a smart material that can locate and image cancer sites inside tissues.



Nano-optical research reveals insight for improved plasmonic grating design

Wed, 21 Sep 2016 06:31:05 EDT

University of Arkansas researchers have discovered that a newly developed plasmonic fabrication capability and design can improve the performance of biosensors, solar cells and photodetectors.



Detailed molecular structure of silver nanocrystals determined

Wed, 21 Sep 2016 06:03:21 EDT

Structural chemist and chemical crystallographer Dr Alison Edwards has contributed to the characterisation of two large, complex silver nanoclusters of 136 and 374 atoms as part of an international collaboration led by researchers from Xiamen University in China.



Researchers develop more efficient, reliable means of electrically contacting graphene

Tue, 20 Sep 2016 16:43:34 EDT

Researchers from the Space and Naval Warfare Systems Center Pacific (SSC Pacific) devised a new way to electrically contact graphene with liquid metals rather than typical rigid electrodes such as gold and silver. Using this new method, the team demonstrated low-contact resistance with a graphene material that is comparable to the best examples published in scientific literature, but with added advantages such as flexibility and low cost.



Study explores thermoelectric screen printing

Tue, 20 Sep 2016 15:59:09 EDT

What if you could easily print a thin layer of material – for use anywhere – that would allow you to create flexible energy harvesters or coolers? That may soon be a reality.



Graphene nanoribbons show promise for healing spinal injuries

Tue, 20 Sep 2016 08:40:04 EDT

The combination of graphene nanoribbons made with a process developed at Rice University and a common polymer could someday be of critical importance to healing damaged spinal cords in people, according to Rice chemist James Tour.



Direct observation of graphene decoupling on Cu(111)

Tue, 20 Sep 2016 08:30:04 EDT

A recent quantum mechanical study of graphene by a research team at Ulsan National Institute of Science and Technology (UNIST), South Korea, has elucidated the intercalation mechanism and pathways for graphene decoupling from the copper substrate.