Energy trapped on the surface of the nanocube in this fashion is called a plasmon. The plasmon creates an intense electromagnetic field between the silver nanocube
and a thin sheet of gold placed a mere 20 atoms away. This field interacts with quantum dotspheres of semiconducting material just six nanometers widehat are sandwiched in between the nanocube and the gold.
The quantum dots, in turn, produce a directional, efficient emission of photons that can be turned on and off at more than 90 gigahertz. here is great interest in replacing lasers with LEDS for short-distance optical communication,
is pushing pretty hard for. he group is now working to use the plasmonic structure to create a single photon source necessity for extremely secure quantum communicationsy sandwiching a single quantum dot in the gap between the silver nanocube and gold foil.
This schematic illustrates the novel nanosheet with three parallel segments created by the researchers each supporting laser action in one of three elementary colors.
The researchers have created a novel nanosheet a thin layer of semiconductor that measures roughly one-fifth of the thickness of human hair in size with a thickness that is roughly one-thousandth of the thickness of human hair with three
Ning group started pursuing the distinctive properties of nanomaterials, such as nanowires or nanosheets, more than 10 years ago.
Six years ago, under U s army Research Office funding, they demonstrated that one could indeed grow nanowire materials in a wide range of energy bandgaps
Later on they realized simultaneous laser operation in green and red from a single semiconductor nanosheet or nanowires.
and very different material properties. e have struggled for almost two years to grow blue emitting materials in nanosheet form,
2015ultra-thin nanowires can trap electron'twisters'that disrupt superconductors February 24th, 2015simulating superconducting materials with ultracold atoms:
2015experiment and theory unite at last in debate over microbial nanowires: New model and experiments settle debate over metallic-like conductivity of microbial nanowires in bacterium March 4th,
2015magnetic vortices in nanodisks reveal information: Researchers from Dresden and Jlich use microwaves to read out information from smallest storage devices March 4th, 2015nanosorbents Increase Extraction, Recycling of Silver from Aqueous solutions March 4th, 201 1
Professor Cronin's research spans a broad range of topics including electrical and spectroscopic characterization of carbon nanotubes, graphene,
2015new nanowire structure absorbs light efficiently: Dual-type nanowire arrays can be used in applications such as LEDS and solar cells February 25th, 2015qd Vision Named Edison Award Finalist for Innovative Color IQ Quantum dot Technology
February 23rd, 2015flexible Electronics Breakthrough in OLED technology March 2nd, 2015discoveries 30 years after C60: Fullerene chemistry with silicon:
#NC State researchers create'nanofiber gusher':'Report method of fabricating larger amounts of nanofibers in liquid A simple process for batch
or continuous formation of polymer nanofibers and other nanomaterials in the bulk of a sheared fluid medium is introduced.
The process could be of high value to commercial nanotechnology as it can be scaled easily up to the fabrication of staple nanofibers at rates that could exceed tens of kilograms per hour.
Creating large amounts of polymer nanofibers dispersed in liquid is a challenge that has vexed researchers for years.
But engineers and researchers at North carolina State university and one of its start-up companies have reported now a method that can produce unprecedented amounts of polymer nanofibers
which have potential applications in filtration, batteries and cell scaffolding. In a paper published online in Advanced Materials,
describe the method that allows them to fabricate polymer nanofibers on a massive scale. The method-fine-tuned after nearly a decade of increasing success in producing micro
you find a mat of nanofibers wrapped around it. When they first started investigating the liquid shearing process,
and nanoribbons as they investigated the process.""Microfibers, nanorods and nanoribbons are interesting and potentially useful,
but you really want nanofibers, "Velev said.""We achieved this during the scaling up and commercialization of the technology."
"Velev engaged with NC State's Office of Technology Transfer and the university's TEC (The Entrepreneurship Collaborative) program to commercialize the discoveries.
They worked with the experienced entrepreneur Miles Wright to start a company called Xanofi to advance the quest for nanofibers
"We can now create kilograms of nanofibers per hour using this simple continuous flow process,
which when scaled up becomes a'nanofiber gusher, '"Velev said.""Depending on the concentrations of liquids, polymers and antisolvents,
"When we produce the nanofibers via continuous flow, we get exactly the same nanofibers you would get
if you were producing small quantities of them. The fabrication of these materials in liquid is advantageous
because you can create truly three-dimensional nanofiber substrates with very, very high overall surface area. This leads to many enhanced products ranging from filters to cell scaffolds, printable bioinks, battery separators, plus many more."#
Image-dipole distortionsjqi fellow Edo Waks and his colleagues have performed nanoscopic mappings of the electromagnetic field profile around silver nanowires by positioning quantum dots (the emitter) nearby.
Previous work summarized at http://jqi. umd. edu/news/using-single-quantum dots-probe-nanowires. They discovered that sub-wavelength imaging suffered from a fundamental problem,
namely that an"image dipole"induced in the surface of the nanowire was distorting knowledge of the quantum dot's true position.
(as if the nanowire were acting as a sort of funhouse mirror). The JQI experiment successfully measured the image-dipole effect
The resulting work provides a more accurate map of the electromagnetic fields surrounding the nanowire. The JQI scientists published their results in the journal Nature Communications.
"Nanoscale probing of image dipole interactions in a metallic nanostructure,"Chad Ropp, Zachary Cummins, Sanghee Nah, John T. Fourkas, Benjamin Shapiro, Edo Waks
Tel aviv University researcher discovers novel nanoscale'metamaterial'could serve as future ultra-high-speed computing units March 19th, 2015an improved method for coating gold nanorods March 19th,
2015new nanowire structure absorbs light efficiently: Dual-type nanowire arrays can be used in applications such as LEDS and solar cells February 25th,
2015ultra-thin nanowires can trap electron'twisters'that disrupt superconductors February 24th, 2015discoveries Quantum computing: 1 step closer with defect-free logic gate-Developing a new approach to quantum computing, based on braided quasiparticles as a logic gate to speed up computing,
first requires understanding the potential error-inducing factors March 19th, 2015click! That's how modern chemistry bonds nanoparticles to a substrate March 19th, 2015new optical materials break digital connectivity barriers:
2015announcements NC State researchers create'nanofiber gusher':'Report method of fabricating larger amounts of nanofibers in liquid March 19th,
2015new optical materials break digital connectivity barriers: Tel aviv University researcher discovers novel nanoscale'metamaterial'could serve as future ultra-high-speed computing units March 19th, 2015an improved method for coating gold nanorods March 19th,
2015buckyballs become bucky-bombs: New creation could one day be used for demolition of cancer cells March 19th, 2015interviews/Book reviews/Essays/Reports/Podcasts/Journals/White papers Click!
That's how modern chemistry bonds nanoparticles to a substrate March 19th, 2015nc State researchers create'nanofiber gusher':
'Report method of fabricating larger amounts of nanofibers in liquid March 19th, 2015new optical materials break digital connectivity barriers:
Tel aviv University researcher discovers novel nanoscale'metamaterial'could serve as future ultra-high-speed computing units March 19th, 2015an improved method for coating gold nanorods March 19th,
The process was designed in a way that it enabled the researchers to produce nanocomposite and nanostructured metal at the same time.
and silicon carbide nanoparticles with aver particle size of 55 nm as strengthening agents results in the production of aluminum-based nanocomposite with a strength of 284 MPA.
2015new nanowire structure absorbs light efficiently: Dual-type nanowire arrays can be used in applications such as LEDS and solar cells February 25th, 2015qd Vision Named Edison Award Finalist for Innovative Color IQ Quantum dot Technology February 23rd,
2015sensors The Universitat Politcnica de Valncia is coordinating a European project to develop a device for the quick and early diagnosis of cancer March 7th,
2015experiment and theory unite at last in debate over microbial nanowires: New model and experiments settle debate over metallic-like conductivity of microbial nanowires in bacterium March 4th,
2015pens filled with high-tech inks for do-it-yourself sensors March 3rd, 2015researchers build atomically thin gas and chemical sensors:
2015researchers turn unzipped nanotubes into possible alternative for platinum: Aerogel catalyst shows promise for fuel cells March 2nd, 2015simulating superconducting materials with ultracold atoms:
2015researchers turn unzipped nanotubes into possible alternative for platinum: Aerogel catalyst shows promise for fuel cells March 2nd, 2015scientific breakthrough in rechargeable batteries:
Now two researchers from the S n. Bose National Centre for Basic Sciences, India, have developed a novel supercapacitor electrode based on a hybrid nanostructure made from a hybrid nickel oxide-iron oxide
from AIP Publishing, the researchers report the fabrication technique of the hybrid nanostructure electrode. They also demonstrate its superior performance compared to existing, non-hybrid supercapacitor electrodes.
National Centre for Basic Sciences, mixed nickel oxide and iron oxide as a hybrid material and fabricated the novel core/shell nanostructure electrode."
In Singh's experiment, the core/shell hybrid nanostructure was fabricated through a two-step method. Using a standard electro-deposition technique,
the researchers grew arrays of iron-nickel nanowires inside the pores of anodized alumina oxide templates,
then dissolved the templates to obtain the bare hybrid nanowires. After that, the researchers exposed the nanowires in an oxygen environment at high temperature (450 degrees Celsius) for a short time,
eventually developing a highly porous iron oxide-nickel oxide hybrid shell around the iron-nickel core."
"The advantage of this core/shell hybrid nanostructure is that the highly porous shell nanolayer provides a very large surface area for redox reactions
and iron/iron oxide core/shell nanostructure electrodes, the hybrid material electrode demonstrated higher capacitance,
"The remarkable electrochemical performances and material properties suggest that the iron oxide-nickel oxide hybrid core/shell nanostructure could be a reliable and promising candidate for fabricating the next generation lightweight, low-cost
Now a team of Northwestern University researchers has found a way to print three-dimensional structures with graphene nanoflakes.
Grafysorber embodies the nanocarbon paradox Giulio Cesareo, Directa Plus President and CEO, commented in fact with a nanocarbon material we are able to cut down part of damages caused by hydrocarbons,
derived from carbon itself. Moreover, our product, once exhausted after depuration of water, finishes positively its life cycle inside the asphalt and bitumen, introducing new properties as thermal conductivity and mechanical reinforcement.
#Researchers develop new way to manufacture nanofibers Abstract: Researchers at the University of Georgia have developed an inexpensive way to manufacture extraordinarily thin polymer strings commonly known as nanofibers.
These polymers can be made from natural materials like proteins or from human-made substances to make plastic,
scalable and safe means for producing very large quantities of nanofibers that can be embedded with a multitude of materials,
Many thousands of times thinner than the average human hair, nanofibers are used by medical researchers to create advanced wound dressings--and for tissue regeneration
"The process we have developed makes it possible for almost anyone to manufacture high-quality nanofibers without the need for expensive equipment,
but it also makes it possible for more businesses and researchers to experiment with nanofibers without worrying too much about their budget."
"Currently, the most common nanofiber manufacturing technique--electrospinning--uses high-voltage electricity and specially designed equipment to produce the polymer strings.
"In contrast to other nanofiber spinning devices, most of the equipment used in our device is very simple,
"At laboratory scale, a very simple handcrafted setup is capable of producing spools containing hundreds of yards of nanofibers in a matter of seconds.
forming a nanofiber string that winds around the platter as it continues to spin. The device can spin at more than 1
000 revolutions per minute, enough time to create more than 50 kilometers--or about 31 miles--of ultra-thin nanofiber.
just as thin and just as strong as nanofibers created through other methods, "he said.""Plus, users don't have to worry about the safety issues of using high voltages or the complexity of other machines."
"The researchers can use this method to create a variety of nanofibers simply by changing the polymer placed in the syringe.
for example, create specially designed nanofibers that will promote the growth of stem cells. Fibers like these are used currently to create scaffolding for lab-grown tissues and organs.
Nanofibers can also be loaded with proteins, nanotubes, fluorescent materials and therapeutic agents.""We can use almost any kind of polymer with this platform,
and we can tailor make the nanofibers for different applications, "Minko said.""It's like cooking.
2015nanotubes/Buckyballs/Fullerenes Sandia researchers first to measure thermoelectric behavior by'Tinkertoy'materials May 20th, 2015cotton fibres instead of carbon nanotubes May 9th, 2015a better way to build DNA scaffolds:
2015'Microcombing'creates stronger, more conductive carbon nanotube films May 5th, 2015nanomedicine Effective Nano-Micelles Designed in Iran to Treat Cancer May 20th,
Researchers at the Georgia Institute of technology have shown now that they can assemble DNA NANOSTRUCTURES in a solvent containing no water.
we have shown that DNA NANOSTRUCTURES can be assembled in a water-free solvent, and that we can mix water with the same solvent to speed up the assembly.
The assembly rate of DNA NANOSTRUCTURES can be very slow, and depends strongly on temperature. Raising the temperature increases this rate,
At Georgia Tech he evaluated new solvents for use with DNA NANOSTRUCTURES, solvents that had been designed for other purposes.
he added. inetic traps are among the bottlenecks for producing more complicated DNA NANOSTRUCTURES. Glycholine is miscible in water
Non-aqueous solvent supports DNA NANOTECHNOLOGY May 27th, 2015controlled Release of Anticorrosive Materials in Spot by Nanocarriers May 27th, 2015production of Copper Cobaltite Nanocomposites with Photocatalytic Properties in Iran
Non-aqueous solvent supports DNA NANOTECHNOLOGY May 27th, 2015production of Copper Cobaltite Nanocomposites with Photocatalytic Properties in Iran May 27th, 2015fine-tuned molecular orientation is key to more efficient solar cells
Non-aqueous solvent supports DNA NANOTECHNOLOGY May 27th, 2015controlled Release of Anticorrosive Materials in Spot by Nanocarriers May 27th, 2015production of Copper Cobaltite Nanocomposites with Photocatalytic Properties in Iran
Non-aqueous solvent supports DNA NANOTECHNOLOGY May 27th, 2015controlled Release of Anticorrosive Materials in Spot by Nanocarriers May 27th, 2015production of Copper Cobaltite Nanocomposites with Photocatalytic Properties in Iran
Nanotech has developed some novel high resolution OVD effects based on nanohole arrays, which differ from conventional OVDS providing easy recognition and verification.
These nanohole structures create new colour shifting effects that provide unique visual features such as 3d, HD, and motion.
This baking of nanostructures has already been a great success using zinc oxide. The recent findings concentrate on tin oxide,
This baking of nanostructures has already been a great success using zinc oxide. The recent findings concentrate on tin oxide,
such as belt-like nanostructures, exhibit much more application potential because of their high surface to volume ratio.
However, 1d nanostructures are still difficult to use, because integrating them in real devices is a challenging task.
we have developed three-dimensional (3d) macroscopic material from 1d tin oxide belt-like nanostructures. The resulting ceramic networks exhibit most of the nanoscale properties,
The fascinating part is the structure of the single belt-like nanostructures delivered by this synthesis on the basis of tin oxide crystal structure.
Development of such 3d network materials from tin oxide, with geometry determining defects made by flame transport synthesis at Kiel University is a very interesting step forward into the future of nanostructure growth and applications."#
2015tappi Announces 2015 Nanotechnology Division Technical Award Winner June 6th, 2015unlocking nanofibers potential: Prototype boosts production of versatile fibers fourfold,
2015graphene Haydale Subsidiary Changes Name & Creates New Aerospace Unit June 4th, 2015environmental Issues to Hamper Growth of Global Nanocomposites Market June 4th, 2015an inexpensive rival
2015production of Nanocomposites by Using Direct Nano-Welding of Micromaterials in Iran June 4th, 2015environmental Issues to Hamper Growth of Global Nanocomposites Market June 4th, 2015optical computing/Photonic computing New
Iranian researchers produced biocompatible and biodegradable nanocomposite scaffolds by using a type of natural silk with no cellular toxicity observed in the experiments.
In this research, nanocomposite scaffold was made of silk fibroin, chitosan and alumina through freeze drying method.
"The size of pores decreases due to the presence of alumina ceramic nanoparticles in the synthesis of the nanocomposite scaffold.
Therefore, the proposed nanocomposite scaffold is appropriate from the amount and porosity distribution points of view for the growth of gum fibroblast cells,"Dr. Abbas Teimouri, one of the researchers, stated.
According to the researcher, the mechanical strength, degradability, water sorption and inorganic bioactivity of the produced nanocomposite scaffold have been evaluated by carrying out various tests
for example, to better understand the stepwise formation of nanostructures. Previously, scientists could examine changes in nanostructures only by looking at the large-scale alterations of a bulk population of particles
or by taking'screen shots'in a static fashion of individual nanostructures with electron microscopy.''That process is like taking photos every 10 minutes of a football game
and then trying to piece these photos together to tell the story of what is really a highly dynamic process,
'Until now, this was the state of the art in terms of how we could document how nanostructures formed. The development we describe in our paper demonstrates that these processes can be observed in real time,
researchers had figured not yet out a way to use it to visualize the growth of complex self-assembled, chemical nanostructures.'
if these nanostructures would survive the experiment. This is necessary because materials are susceptible to being destroyed by the high energy electron beam that is used to image them.
Garmor Inc, Increases Capacity for Manufacturing Graphene oxide at Customer Sites June 2nd, 2015military Production of Nanocomposites by Using Direct Nano-Welding of Micromaterials in Iran June 4th,
2015haydale Subsidiary Changes Name & Creates New Aerospace Unit June 4th, 2015environmental Issues to Hamper Growth of Global Nanocomposites Market June 4th, 2015an inexpensive rival to graphene aerogels:
2015iranian Scientists Evaluate Dynamic Interaction between 2 Carbon nanotubes April 14th, 2015memory Technology Moving sector walls on the nano scale June 6th,
2015automotive/Transportation Researchers analyze the structure of bird feathers to create hues without dye June 8th, 2015environmental Issues to Hamper Growth of Global Nanocomposites Market June 4th,
2015production of Nanocomposites by Using Direct Nano-Welding of Micromaterials in Iran June 4th, 2015haydale Subsidiary Changes Name & Creates New Aerospace Unit June 4th, 2015an inexpensive rival to graphene aerogels:
2015researchers grind nanotubes to get nanoribbons: Rice-led experiments demonstrate solid-state carbon nanotube'templates'June 15th, 2015materials/Metamaterials Designer electronics out of the printer:
Optimized printing process enables custom organic electronics June 16th, 2015pixelligent Closes $3. 4 Million in Funding: Capital Will be used to Support Partner & Customer Product Introductions and Increase Manufacturing Capacity June 16th, 2015solar cells in the roof and nanotechnology in the walls June 16th, 2015global Nanoclays Market Analysis
2015researchers analyze the structure of bird feathers to create hues without dye June 8th, 2015environmental Issues to Hamper Growth of Global Nanocomposites Market June 4th, 2015industrial Industrial Nanotech,
Hydrogels block harmful oxygen June 15th, 2015nist's'nano-raspberries'could bear fruit in fuel cells June 9th, 2015unlocking nanofibers potential:
2015high-tech nanofibres could help nutrients in food hit the spot June 17th, 2015imaging Deben reports on how the University of Portsmouth use in situ XCT compressive testing to help answer how materials respond to complex loading conditions June 17th,
2015high-tech nanofibres could help nutrients in food hit the spot June 17th, 2015cellulose from wood can be printed in 3-D June 17th,
2015announcements High-tech nanofibres could help nutrients in food hit the spot June 17th, 2015dyesol Joins Solliance as an Industrial Partner June 17th,
butterflies create colors from nanostructures in their wings, honey bees can see and respond to ultraviolet signals,
"Laser-assembled nanowires For the first step in grid construction, the team took advantage of their recent invention of laser zone annealing (LZA) to produce the extremely localized thermal spikes needed to drive ultra-fast self-assembly.
and transforms them into functional nanowires. Layer-by-layer lattice The first completed nanowire array acts as the foundation of the full lattice.
Additional layers each one following variations on that same process, are stacked then to produce customized, crisscrossing configurations--like chain-link fences 10,000 times thinner than a human hair."
"The direction of the laser sweeping across each unassembled layer determines the orientation of the nanowire rows,
"For example, a single layer of platinum nanowires conducts electricity in only one direction, but a two-layer mesh conducts uniformly in all directions."
and thus have a lot of freedom in fabricating multi-component nanostructures, "Yager said.""It's hard to anticipate all the technologies this rapid and versatile technique will allow
#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.
A thin liquid crystal layer is sandwiched over a metallic nanostructure shaped like a microscopic egg carton that absorbs some light wavelengths
A novel microscope for nanosystems June 25th, 2015iranian Researchers Synthesize Nanostructures with Controlled Shape, Structure June 25th, 2015discoveries June 29th, 2015efforts to Use Smart Nanocarriers to Cure Leukemia Yield
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,
to promote the growth of silicon nanowires and to induce gold-based patterns in the silicon.
2015irt Nanoelec Partners Achieve 3d Chip-stacking Technology & 3d Network-on-chip Framework for Digital Processing July 9th, 2015ultra-thin, all-inorganic molecular nanowires successfully compounded July 8th,
POSTECH scientists develop breakthrough technique to easily optimize electrical properties of Polyaniline nanosheets to an unprecedented level in an environmental-friendly and inexpensive way July 7th,
2015ultra-thin, all-inorganic molecular nanowires successfully compounded July 8th, 2015surfing a wake of light: Researchers observe and control light wakes for the first time July 6th,
In this study, researchers first pattern nanostructures on the graphene surface by bombarding it with electron beams and etching it with oxygen ions.
the electrons in graphene nanostructures begin to oscillate. This phenomenon concentrates light into tiny spots,
Layered semiconducting black arsenic phosphorus as an alternative to silicon July 9th, 2015ultra-thin, all-inorganic molecular nanowires successfully compounded July 8th, 2015down to the quantum dot:
#Researchers find nanowires have pronounced unusually'anelastic'properties Anelastic materials exhibit gradual full recovery of deformation once a load is removed, leading to efficient dissipation of internal mechanical energy.
and p-doped Si nanowires (NWS) can exhibit anelastic behaviour that is up to four orders of magnitude larger than the largest anelasticity observed in bulk materials, with a recovery time-scale in the order
Researchers from North carolina State university and Brown University have found that nanoscale wires (nanowires) made of common semiconductor materials have pronounced a anelasticity-meaning that the wires,
"Because nanowires are so small, the anelasticity is significant and easily observed --although it was a total surprise
when we first discovered the anelasticity in nanowires.""The anelasticity was discovered when Zhu and his students were studying the buckling behavior of nanowires."
"Anelasticity is a fundamental mechanical property of nanowires, and we need to understand these sort of mechanical behaviors
if we want to incorporate nanowires into electronics or other devices,"says Elizabeth Dickey, a professor of materials science and engineering at NC State and co-author of the paper.
Nanowires hold promise for use in a variety of applications, including flexible, stretchable and wearable electronic devices.
The researchers worked with both zinc oxide and silicon nanowires, and found that -when bent-the nanowires would return more than 80 percent of the way to their original shape instantaneously,
but return the rest of the way (up to 20 percent) slowly.""In nanowires that are approximately 50 nanometers in diameter,
it can take 20 or 30 minutes for them to recover that last 20 percent of their original shape,
"says Guangming Cheng, a Ph d. student in Zhu's lab and the first author for the paper.
The work was done using tools developed in Zhu's group that enabled the team to conduct experiments on nanowires
If you think of the bent nanowire as an arch, the atoms are moving from the inside of the arch to the outside.
"This phenomenon is pronounced in nanowires. For instance, zinc oxide nanowires exhibited anelastic behavior that is up to four orders of magnitude larger than the largest anelasticity observed in bulk materials,
with a recovery time-scale in the order of minutes,"says Huajian Gao, a professor at Brown University and co-corresponding author of the paper.
Detailed modeling by Gao's group indicates that the pronounced anelasticity in nanowires is because it is much easier for atoms to move through nanoscale materials than through bulk materials.
nanowires can be bent much further than thicker wires without becoming permanently deformed or breaking.""A reviewer commented that this is a new important page in the book on mechanics of nanostructures,
which was very flattering to hear,"Zhu says. The team plans to explore whether this pronounced anelasticity is common across nanoscale materials and structures.
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