Nanostructures

Dna nanostructure (1)
Nanocapsule (5)
Nanocomposite (7)
Nanofiber (5)
Nanofibre (1)
Nanoflake (1)
Nanopillar (4)
Nanoribbon (1)
Nanosheet (3)
Nanostructure (11)
Nanotube (58)
Nanowire (58)

Synopsis: Nanotechnology: Nanotechnology generale: Nanostructures:

#DNA motor uses arms to walk across a nanotube Purdue University rightoriginal Studyposted by Emil Venere-Purdue on December 19 2013engineers made a motor out of DNA

and then used it to move nanoparticles of cadmium disulfide along the length of a nanotube.

As it moves along a carbon-nanotube track it continuously harvests energy from strands of RNA molecules vital to a variety of roles in living cells

and viruses. ur motors extract chemical energy from RNA molecules decorated on the nanotubes and use that energy to fuel autonomous walking along the carbon nanotube trackchoi says.

The core is made of an enzyme that cleaves off part of a strand of RNA. After cleavage the upper DNA arm moves forward binding with the next strand of RNA

The process repeats until reaching the end of the nanotube track. The researchers combined two fluorescent imaging systems to document the motor s movement one in the visible spectrum and the other in the near-infrared range.

and the nanotubes are fluorescent in the near-infrared. The motor took about 20 hours to reach the end of the nanotube which was several microns long

but the process might be sped up by changing temperature and ph a measure of acidity.

#Does this carbon nanotube computer spell the end for silicon? Stanford university rightoriginal Studyposted by Tom Abate-Stanford on September 27 2013engineers have built a basic computer using carbon nanotubes a success that points to a potentially faster more efficient alternative to silicon chips.

The achievement is reported in an article on the cover of the journal Nature. eople have been talking about a new era of carbon nanotube electronics moving beyond siliconsays Subhasish Mitra an electrical engineer

Here is the proof. xperts say the achievement will galvanize efforts to find successors to silicon chips which could soon encounter physical limits that might prevent them from delivering smaller faster cheaper electronic devices. arbon nanotubes CNTS have long been considered as a potential successor to the silicon transistorsays Professor

But until now it hasn t been clear that CNTS a semiconductor material could fulfill those expectations. here is no question that this will get the attention of researchers in the semiconductor community

But a bedeviling array of imperfections in these carbon nanotubes has frustrated long efforts to build complex circuits using CNTS.

team has made to this worldwide effort. irst they put in place a process for fabricating CNT-based circuitsde Micheli says. econd they built a simple

but effective circuit that shows that computation is doable using CNTS. s Mitra says: t s not just about the CNT COMPUTER.

It s about a change in directions that shows you can build something real using nanotechnologies that move beyond silicon

He called the Stanford work major benchmarkin moving CNTS toward practical use. CNTS are long chains of carbon atoms that are extremely efficient at conducting and controlling electricity.

They are so thinâ##thousands of CNTS could fit side by side in a human hairâ##that it takes very little energy to switch them off according to Wong a co-author of the paper. hink of it as stepping on a garden hosewong explains. he thinner the hose the easier it is to shut off the flow. n theory this combination

of efficient conductivity and low-power switching make carbon nanotubes excellent candidates to serve as electronic transistors. NTS could take us at least an order of magnitude in performance beyond where you can project silicon could take uswong said.

First CNTS do not necessarily grow in neat parallel lines as chipmakers would like. Over time researchers have devised tricks to grow 99.5 percent of CNTS in straight lines.

But with billions of nanotubes on a chip even a tiny degree of misaligned tubes could cause errors

so that problem remained. A second type of imperfection has stymied also CNT technology. Depending on how the CNTS grow a fraction of these carbon nanotubes can end up behaving like metallic wires that always conduct electricity instead of acting like semiconductors that can be switched off.

Since mass production is the eventual goal researchers had to find ways to deal with misaligned

and/or metallic CNTS without having to hunt for them like needles in a haystack. e needed a way to design circuits without having to look for imperfections

or even know where they weremitra says. The Stanford paper describes a two-pronged approach that the authors call an mperfection-immune design. o eliminate the wire-like

or metallic nanotubes the Stanford team switched off all the good CNTS. Then they pumped the semiconductor circuit full of electricity.

All of that electricity concentrated in the metallic nanotubes which grew so hot that they burned up

This sophisticated technique eliminated the metallic CNTS in the circuit. Bypassing the misaligned nanotubes required even greater subtlety.

The Stanford researchers created a powerful algorithm that maps out a circuit layout that is guaranteed to work no matter

whether or where CNTS might be askew. his imperfections-immune design technique makes this discovery truly exemplarysays Sankar Basu a program director at the National Science Foundation.

Their CNT COMPUTER performed tasks such as counting and number sorting. It runs a basic operating system that allows it to swap between these processes.

In a demonstration of its potential the researchers also showed that the CNT COMPUTER could run MIPS a commercial instruction set developed in the early 1980s by then Stanford engineering professor and now university President John Hennessy.

Though it could take years to mature the Stanford approach points toward the possibility of industrial-scale production of carbon nanotube semiconductors according to Naresh Shanbhag a professor at the University of Illinois at Urbana-Champaign

and director of SONIC a consortium of next-generation chip design research. he Wong/Mitra paper demonstrates the promise of CNTS in designing complex computing systemsshanbhag says adding that this will motivate researchers elsewhere toward greater efforts in chip design

and a world leader in CNT research. The National Science Foundation SONIC the Stanford Graduate Fellowship and the Hertz Foundation Fellowship funded the work.

Using a scanning electron microscope the Stanford team captured images of these microbes attaching milky tendrils to the carbon filaments. ou can see that the microbes make nanowires to dump off their excess electronscriddle says.

But the sensors aren just useful for explosives the researchers found that the coated nanotubes can also detect two pesticides that contain nitro-aromatic compounds.

and to modify the conductivity of graphene nanostructures. Such applications could be some time off, says Geim."

Using another type of carbon nanotube, they also modified plants to detect the gas nitric oxide. Together

photosynthetic activity measured by the rate of electron flow through the thylakoid membranes was 49 percent greater than that in isolated chloroplasts without embedded nanotubes.

the nanotubes moved into the chloroplast and boosted photosynthetic electron flow by about 30 percent.

Strano lab has developed previously carbon nanotube sensors for many different chemicals, including hydrogen peroxide, the explosive TNT, and the nerve gas sarin.

When the target molecule binds to a polymer wrapped around the nanotube, it alters the tube fluorescence. e could someday use these carbon nanotubes to make sensors that detect in real time, at the single-particle level,

They describe their nanowire mesh design in the journal ACS Nano. Peidong Yang Bin Liu and colleagues note that harnessing sunlight to split water

The researchers took a page from the paper industry using one of its processes to make a flat mesh out of light-absorbing semiconductor nanowires that

in order to create nanostructures and to'draw'substances onto nano-sized regions. The latter is called'nanolithography 'and was used the technique by Professor Evans and his team in this research.

either by patterning graphene to make nanoribbons or by introducing defects in the graphene layerr using bilayer graphene stacked in a certain pattern that allows band gap opening upon application of a vertical electric fieldor better control and detection of current.

While one-dimensional materials such as carbon nanotubes and nanowires also allow excellent electrostatics and at the same time possess band gap they are not suitable for low-cost mass production due to their process complexities she said.

At present the scientific community worldwide is actively seeking practical applications of 2d semiconductor materials such as Mos2 nanosheets.

His team has made ultrathin nanowires that can monitor and influence what goes on inside cells.

#Shrinky Dinks close the gap for nanowires How do you put a puzzle together when the pieces are too tiny to pick up?

to close the gap between nanowires in an array to make them useful for high-performance electronics applications.

Nanowires are extremely fast, efficient semiconductors, but to be useful for electronics applications, they need to be packed together in dense arrays.

Researchers have struggled to find a way to put large numbers of nanowires together so that they are aligned in the same direction and only one layer thick."

"Chemists have done already a brilliant job in making nanowires exhibit very high performance. We just don't have a way to put them into a material that we can handle,

people can make nanowires and nanotubes using any method they like and use the shrinking action to compact them into a higher density."

"The researchers place the nanowires on the Shrinky Dinks plastic as they would for any other substrate,

but then shrink it to bring the wires much closer together. This allows them to create very dense arrays of nanowires in a simple, flexible and very controllable way.

The shrinking method has added the bonus of bringing the nanowires into alignment as they increase in density.

Nam's group demonstrated how even wires more than 30 degrees off-kilter can be brought into perfect alignment with their neighbors after shrinking."

and the low cost of plastic could have a huge impact on nanowire assembly and processing for applications."

For example, experiments have shown that film made of packed nanowires has properties that differ quite a bit from a crystal thin film."

made of densely packed nanowires, that could harvest energy from light much more efficiently than traditional thin-film solar cells s

#Eco-friendly versatile nanocapsules developed The Institute for Basic Science (IBS) has announced that the Centre for Self-assembly

and Complexity have succeeded in developing a new technology that introduces metal nanoparticles on the surface of polymer nanocapsules made of cucurbit 6 uril.

The researchers have found that using polymer nanocapsules made of cucurbit 6 uril and metal salts can serve as a versatile platform where equal sized metal nanoparticles can be distributed evenly on the surface of the polymer nanocapsules.

Cucurbit 6 uril has properties which strongly and selectively recognize organic and inorganic chemical species. This makes it possible to use it as a protecting agent

The metal nanoparticle-decorated polymer nanocapsules exhibit the following properties in water: high stability for up to 6 months;

Instead, silicon nanopillars are arranged precisely into a honeycomb pattern to create a etasurfacethat can control the paths and properties of passing light waves.

Until now, the only experimental TFET to meet the International Technology Roadmap for Semiconductors (ITRS) goal of average subthreshold swing below 60 millivolts per decade over four decades of current was a transistor that used nanowires.

"The Calverton, New york-based Graphene 3d Lab is already well-known for the development of proprietary graphene-based nanocomposite materials for 3d printing,

Can nanofiber save your life? Researchers in professor Margaret Frey lab create fibers hundreds of times thinner than a human hair that can capture toxic chemicals and pathogens.

Frey and her colleagues are replacing that cost by making the devices with nanofibers from plastics,

Using nanofibers, processes done in a medical testing lab for example, purifying samples, mixing ingredients, capturing bacteria can be done with material about the size of a deck of cards.

Frey and her students have encapsulated pesticides into biodegradable nanofibers. This keeps them intact until needed

these nanofibers just might save a life, she said. Source: http://www. cornell. ed

#Nanoporous Gold Sponge Detects Pathogens Faster This novel technique enables sensitive DNA detection in compound biological samples e g.,

Rice university researchers model graphene/nanotube hybrids to test properties September 14th, 2015coming out September 14th, 2015nano in food and agriculture:

Understanding motions of thin layers may help design solar cells, electronics and catalysts of the future September 10th, 2015realizing carbon nanotube integrated circuits:

Encapsulation layers keep carbon nanotube transistors stable in open air September 8th, 2015new nanomaterial maintains conductivity in three dimensions:

International team seamlessly bonds CNTS and graphene September 5th, 2015phagraphene, a'relative'of graphene, discovered September 2nd, 2015chip Technology Pillared graphene gains strength:

Rice university researchers model graphene/nanotube hybrids to test properties September 14th, 2015an even more versatile optical chip:

2015ut researchers give nanosheets local magnetic properties September 11th, 2015ultrafast uncoupled magnetism in atoms: A new step towards computers of the future September 10th, 2015discoveries Pillared graphene gains strength:

Rice university researchers model graphene/nanotube hybrids to test properties September 14th, 2015an even more versatile optical chip:

Rice university researchers model graphene/nanotube hybrids to test properties September 14th, 2015coming out September 14th, 2015nano in food and agriculture:

Rice university researchers model graphene/nanotube hybrids to test properties September 14th, 2015coming out September 14th, 2015nano in food and agriculture:

2015new Nanocomposite Designed in Iran for Production of Supercapacitors September 10th, 2015first superconducting graphene created by UBC researchers September 9th, 2015hybrid solar cell converts both light and heat from sun's rays into electricity (video) September 9th,

By combining semiconducting nanowires and bacteria, researchers can now produce liquid fuel. Three pioneers in the field of synthetic photosynthesis discuss the potential of this technology

Rice university researchers model graphene/nanotube hybrids to test properties September 14th, 2015coming out September 14th, 2015nano in food and agriculture:

Rice university researchers model graphene/nanotube hybrids to test properties September 14th, 2015an even more versatile optical chip:

2015ut researchers give nanosheets local magnetic properties September 11th, 2015discoveries Building the electron superhighway: Vermont scientists invent new approach in quest for organic solar panels and flexible electronics September 14th, 2015pillared graphene gains strength:

Rice university researchers model graphene/nanotube hybrids to test properties September 14th, 2015an even more versatile optical chip:

Rice university researchers model graphene/nanotube hybrids to test properties September 14th, 2015coming out September 14th, 2015nano in food and agriculture:

Rice university researchers model graphene/nanotube hybrids to test properties September 14th, 2015coming out September 14th, 2015nano in food and agriculture:

Nagoya University and the JST-ERATO Itami Molecular Nanocarbon Project have developed a bulky iridium catalyst that selectively directs a boron moiety to the opposite side of mono-substituted benzene derivatives.

but rather of silicon nanopillars that are arranged precisely into a honeycomb pattern to create a"metasurface"that can control the paths and properties of passing light waves.

"Scanning electron microscope of a metasurface showing silicon nanopillars on a glass substrate. Tilted view is shown on the right and top view on the left.

Scientists with the U s. Department of energy (DOE)' s Lawrence Berkeley National Laboratory (Berkeley Lab) and the University of California (UC) Berkeley have created a hybrid system of semiconducting nanowires and bacteria

The paper is titled"Nanowire-bacteria hybrids for unassisted solar carbon dioxide fixation to value-added chemicals.""The other corresponding authors and leaders of this research are chemists Christopher Chang and Michelle Chang.

"In our system, nanowires harvest solar energy and deliver electrons to bacteria, where carbon dioxide is reduced and combined with water for the synthesis of a variety of targeted, value-added chemical products."

"By combining biocompatible light-capturing nanowire arrays with select bacterial populations, the new artificial photosynthesis system offers a win/win situation for the environment:

the morphology of the nanowire array protects the bacteria like Easter eggs buried in tall grass

"The system starts with an"artificial forest"of nanowire heterostructures, consisting of silicon and titanium oxide nanowires, developed earlier by Yang and his research group."

"Our artificial forest is similar to the chloroplasts in green plants, "Yang says.""When sunlight is absorbed, photo-excited electron?

hole pairs are generated in the silicon and titanium oxide nanowires, which absorb different regions of the solar spectrum.

"Once the forest of nanowire arrays is established, it is populated with microbial populations that produce enzymes known to selectively catalyze the reduction of carbon dioxide.

"We were able to uniformly populate our nanowire array with S. ovata using buffered brackish water with trace vitamins as the only organic component."

and catalytic activity that is made possible by the nanowire/bacteria hybrid technology. With this approach the Berkeley team achieved a solar energy conversion efficiency of up to 0. 38-percent for about 200 hours under simulated sunlight,

They then infused the nanotextures with a layer of lubricant that completely coated the nanostructures,

The nanostructures also greatly enhanced lubricant retention compared to the microstructured surface alone. The same design principle can be extended easily to other materials beyond silicon, such as metals, glass ceramics and plastics.

Scientists with the U s. Department of energy (DOE) Lawrence Berkeley National Laboratory (Berkeley Lab) and the University of California (UC) Berkeley have created a hybrid system of semiconducting nanowires and bacteria that mimics

nanowires harvest solar energy and deliver electrons to bacteria, where carbon dioxide is reduced and combined with water for the synthesis of a variety of targeted, value-added chemical products.

By combining biocompatible light-capturing nanowire arrays with select bacterial populations, the new artificial photosynthesis system offers a win/win situation for the environment:

the morphology of the nanowire array protects the bacteria like Easter eggs buried in tall grass

The system starts with an rtificial forestof nanowire heterostructures, consisting of silicon and titanium oxide nanowires,

developed earlier by Yang and his research group. ur artificial forest is similar to the chloroplasts in green plants,

photo-excited electron#hole pairs are generated in the silicon and titanium oxide nanowires, which absorb different regions of the solar spectrum.

Once the forest of nanowire arrays is established, it is populated with microbial populations that produce enzymes known to selectively catalyze the reduction of carbon dioxide.

says Michelle Chang. e were able to uniformly populate our nanowire array with S. ovata using buffered brackish water with trace vitamins as the only organic component.

and catalytic activity that is made possible by the nanowire/bacteria hybrid technology. With this approach, the Berkeley team achieved a solar energy conversion efficiency of up to 0. 38-percent for about 200 hours under simulated sunlight,

Instead, silicon nanopillars are arranged precisely into a honeycomb pattern to create a etasurfacethat can control the paths and properties of passing light waves.

It is this ability to design arbitrary nanostructures using DNA manipulation that inspired the Wyss team to envision using these DNA structures as practical foundries or molds for inorganic substances.

Just as any expanding material can be shaped inside a mold to take on a defined 3d form the Wyss team set out to grow inorganic particles within the confined hollow spaces of stiff DNA NANOSTRUCTURES.

in order to create nanostructures and to'draw'substances onto nano-sized regions. The latter is called'nanolithography 'and was used the technique by Evans and his team in this research.

he does the electrochemistry and nanostructures, "she said. As for the biological component, Gomes said she is using"nanobrushes"specially designed to grab particular bacteria.

That such nanostructures could even be made is because of the decades-long investment by the electronics industry in developing nanofabrication tools to make the tiny components in computers.

#Nanowire implants offer remote-controlled drug delivery Abstract: Remote-controlled Eradication of Astrogliosis in Spinal cord Injury via Electromagnetically-induced Dexamethasone Release from"Smart"Nanowireswen Gao and Richard Borgenswe describe a system to deliver drugs to selected tissues continuously,

novel vertically aligned electromagnetically-sensitive Polypyrrole Nanowires (Ppynws). Approximately 1-2mm 2 Dexamethasone (DEX) doped Ppynws was lifted on a single drop of sterile water by surface tension,

A team of researchers has created a new implantable drug-delivery system using nanowires that can be controlled wirelessly.

The nanowires respond to an electromagnetic field generated by a separate device, which can be used to control the release of a preloaded drug.

The nanowires are made of polypyrrole, a conductive polymer material that responds to electromagnetic fields. Wen Gao, a postdoctoral researcher in the Center for Paralysis Research who worked on the project with Borgens

grew the nanowires vertically over a thin gold base, like tiny fibers making up a piece of shag carpet hundreds of times smaller than a human cell.

The nanowires can be loaded with a drug and, when the correct electromagnetic field is applied, the nanowires release small amounts of the payload.

This process can be started and stopped at will, like flipping a switch, by using the corresponding electromagnetic field stimulating device,

and transported a patch of the nanowire carpet on water droplets that were used used to deliver it to the site of injury.

The nanowire patches adhere to the site of injury through surface tension Gao said. The magnitude and wave form of the electromagnetic field must be tuned to obtain the optimum release of the drug,

Functional Drug Delivery Using Electromagnetic field-Responsive Polypyrrole Nanowires, "was published in the journal Langmuir. Other team members involved in the research include John Cirillo,

A 1-2 millimeter patch of the nanowires doped with dexamethasone was placed onto spinal cord lesions that had been exposed surgically,

and those that received a nanowire patch but were exposed not to the electromagnetic field. In some cases, treated mice had no detectable GFAP signal.

Magnetic organometallic framework (MOF) nanocomposite has been used to selectively separate these metals from the foodstuff and their pre-concentration.

2015high-tech nanofibres could help nutrients in food hit the spot June 17th, 2015the European project SVARNISH,

This objective was achieved by creating a homogenous coating made of a nanocomposite of zinc oxide/nitrogen silver (N-Ag/Zno) on the fabrics.

the processing of the woolen fabric samples by using optimum amount of honeycomb nanocomposite such as N-Ag/Zno improves the biological, mechanical and hydrophilicity of the fabrics.

Among the other advantages of the use of this nanocomposite in the production of fabrics, mention can be made of creating a delay in flammability,

Finally, the abovementioned properties are created in the final product by processing of the woolen fabrics with the nanocomposite.

and after it was compressed (b). Compression makes the graphene nanoflakes more dense, which improves the electrical conductivity of the laminate.

#Making polymer nanostructures from a greenhouse gas (Nanowerk News) A future where power plants feed their carbon dioxide directly into an adjacent production facility instead of spewing it up a chimney

In the journal Angewandte Chemie("Construction of Versatile and Functional Nanostructures Derived from CO2-based Polycarbonates),

Versatile nanostructures made from CO2 based polycarbonates. Wiley-VCH) CO2 and epoxides (highly reactive compounds with a three-membered ring made of two carbon atoms

#Nanowire clothing could keep people warm without heating everything else To stay warm when temperatures drop outside,

But scientists have developed now a novel nanowire coating for clothes that can both generate heat

the special nanowire cloth trapped body heat far more effectively. Because the coatings are made out of conductive materials,

so Bailie did it manually. e used a sheet of plastic with silver nanowires on it, he said. hen we built a tool that uses pressure to transfer the nanowires onto the perovskite cell, kind of like a temporary tattoo.

You just need to rub it to transfer the film. Remarkable efficiency For the experiment, the Stanford team stacked a perovskite solar cell with an efficiency of a 12.7 percent on top of a low-quality silicon cell with an efficiency of just 11.4 percent. y combining two cells

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