#Taking aircraft manufacturing out of the oven Aerospace engineers at MIT have developed now a carbon nanotube (CNT) film that can heat
"Wardle says the carbon nanotube film is also incredibly lightweight: After it has fused the underlying polymer layers,
Carbon nanotube deicerswardle and his colleagues have experimented with CNT films in recent years, mainly for deicing airplane wings.
carbon nanotubes heat efficiently when exposed to an electric current. The group first developed a technique to create a film of aligned carbon nanotubes composed of tiny tubes of crystalline carbon
standing upright like trees in a forest. The researchers used a rod to roll the"forest"flat,
creating a dense film of aligned carbon nanotubes. In experiments, Wardle and his team integrated the film into airplane wings via conventional,
If the CNT film could generate heat, why not use it to make the composite itself?
The researchers manufactured a CNT film about the size of a Post-it note, and placed the film over a square of Cycom 5320-1. They connected electrodes to the film,
or cross-link, the polymer and carbon fiber layers, finding that the CNT film used one-hundredth the electricity required for traditional oven-based methods to cure the composite.
Wardle says the results pushed the group to test the CNT film further: As different composites require different temperatures in order to fuse,
whether the CNT film could, quite literally, take the heat.""At some point, heaters fry out,
"Gregory Odegard, a professor of computational mechanics at Michigan Technological University, says the group's carbon nanotube film may go toward improving the quality and efficiency of fabrication processes for large composites, such as wings on commercial aircraft.
more conductive carbon nanotube films"It's a simple process and can create a lightweight CNT film,
or'bucky paper,'that is a meter wide and twice as strong as previous such films--it's even stronger than CNT FIBERS,
"says Yuntian Zhu, Distinguished Professor of Materials science and engineering at NC State and corresponding author of a paper describing the work.
The researchers begin by growing the CNTS on a conventional substrate in a closely packed array.
The CNTS are tangled together, so when researchers pull on one end of the array the CNTS form a continuous ribbon that is only nanometers thick.
This ribbon is attached to a spool which begins winding the ribbon up. As the spool pulls, the CNT ribbon is dragged between two surgical blades.
While the blades appear straight to the naked eye, they actually have micrometer-scale fissures on their cutting edge.
These fissures create a kind of"microcomb"that pulls the CNTS into alignment--just as a regular comb sorts through tangled hair.
When the ribbon of aligned CNTS is being wound onto the spool, the researchers apply an alcohol solution.
This pulls the CNTS closer together, strengthening the bonds between CNTS. The CNT ribbon wraps around itself as it winds around the spool
creating a layered film of pure CNTS. Researchers can control the thickness of the film by controlling the number of layers.
The CNT films made using the microcombing technique had more than twice the tensile strength of the uncombed CNT films--greater than 3 gigapascals for the microcombed material,
versus less than 1. 5 gigapascals for the uncombed material. The microcombed CNT film also had 80 percent higher electrical conductivity than the uncombed film."
"This is a significant advance, but we want to find ways to make CNT alignment even straighter,
"Zhu says.""It's still not perfect.""In addition, the technique would theoretically be easy to scale up for large-scale production.
The pressure sensors are made of a carbon nanotube-elastomer composite shaped into tiny pyramidal structures that are coated onto a surface.
#icrocombingcreates Stronger, More Conductive Carbon nanotube Films Researchers from North carolina State university and China Suzhou Institute of Nanoscience and Nano-Biotics have developed an inexpensive technique called icrocombingto align carbon nanotubes (CNTS),
pure CNT films that are stronger than any previous such films. The technique also improves the electrical conductivity that makes these films attractive for use in electronic
and aerospace applications. t a simple process and can create a lightweight CNT film, or ucky paper, that is a meter wide and twice as strong as previous such films it even stronger than CNT FIBERS,
says Yuntian Zhu, Distinguished Professor of Materials science and engineering at NC State and corresponding author of a paper describing the work.
The researchers begin by growing the CNTS on a conventional substrate in a closely packed array.
The CNTS are tangled together, so when researchers pull on one end of the array the CNTS form a continuous ribbon that is only nanometers thick.
This ribbon is attached to a spool, which begins winding the ribbon up. As the spool pulls, the CNT ribbon is dragged between two surgical blades.
While the blades appear straight to the naked eye they actually have micrometer-scale fissures on their cutting edge.
These fissures create a kind of icrocombthat pulls the CNTS into alignment just as a regular comb sorts through tangled hair.
When the ribbon of aligned CNTS is being wound onto the spool, the researchers apply an alcohol solution.
This pulls the CNTS closer together, strengthening the bonds between CNTS. The CNT ribbon wraps around itself as it winds around the spool,
creating a layered film of pure CNTS. Researchers can control the thickness of the film by controlling the number of layers.
The CNT films made using the microcombing technique had more than twice the tensile strength of the uncombed CNT films greater than 3 gigapascals for the microcombed material
versus less than 1. 5 gigapascals for the uncombed material. The microcombed CNT film also had 80 percent higher electrical conductivity than the uncombed film. his is a significant advance,
but we want to find ways to make CNT alignment even straighter, Zhu says. t still not perfect. n addition,
the technique would theoretically be easy to scale up for large-scale production. We like to find an industry partner to help us scale this up
Based on multiwall carbon nanotubes and tiny rectifiers fabricated onto them, the optical rectennas could provide a new technology for photodetectors that would operate without the need for cooling,
the carbon nanotubes act as antennas to capture light from the sun or other sources. As the waves of light hit the nanotube antennas,
Using metallic multiwall carbon nanotubes and nanoscale fabrication techniques, Cola and collaborators Asha Sharma, Virendra Singh and Thomas Bougher constructed devices that utilize the wave nature of light rather than its particle nature.
Fabricating the rectennas begins with growing forests of vertically-aligned carbon nanotubes on a conductive substrate.
enough to drive electrons out of the carbon nanotube antennas when they are excited by light. In operation, oscillating waves of light pass through the transparent calcium-aluminum electrode
opening the carbon nanotubes to allow multiple conduction channels, and reducing resistance in the structures. e think we can reduce the resistance by several orders of magnitude just by improving the fabrication of our device structures,
Nanocarbon architectures derived from biological materials such as mushrooms can be considered a green and sustainable alternative to graphite-based anodes,
Brighter, new energy saving flat panel lights based on carbon nanotubes Even as the 2014 Nobel prize in Physics has enshrined light emitting diodes (LEDS) as the single most significant and disruptive energy-efficient lighting solution of today scientists
Electronics based on carbon especially carbon nanotubes (CNTS) are emerging as successors to silicon for making semiconductor materials.
Scientists from Tohoku University in Japan have developed a new type of energy-efficient flat light source based on carbon nanotubes with very low power consumption of around 0. 1 Watt for every hour's operation
and optimization of the device which is based on a phosphor screen and single-walled carbon nanotubes as electrodes in a diode structure.
They assembled the device from a mixture liquid containing highly crystalline single-walled carbon nanotubes dispersed in an organic solvent mixed with a soap-like chemical known as a surfactant.
The new devices have luminescence systems that function more like cathode ray tubes with carbon nanotubes acting as cathodes
We have found that a cathode with highly crystalline single-walled carbon nanotubes and an anode with the improved phosphor screen in our diode structure obtained no flicker field emission current and good brightness homogeneity Shimoi said.
In recent years carbon nanotubes have emerged as a promising material of electron field emitters owing to their nanoscale needle shape and extraordinary properties of chemical stability thermal conductivity and mechanical strength.
Highly crystalline single-walled carbon nanotubes (HCSWCNT) have nearly zero defects in the carbon network on the surface Shimoi explained.
The resistance of cathode electrode with highly crystalline single-walled carbon nanotube is very low. Thus the new flat-panel device has compared smaller energy loss with other current lighting devices
Many researchers have attempted to construct light sources with carbon nanotubes as field emitter Shimoi said. But nobody has developed an equivalent and simpler lighting device.
Among nanomaterials, carbon-based nanoparticles such as carbon nanotubes and graphene have shown promising results, but they suffer from relatively low electrical conductivity,
Other groups have made similar supercapacitors using carbon nanotubes or other materials, but the niobium yarns are stronger and 100 times more conductive.
Overall, niobium-based supercapacitors can store up to five times as much power in a given volume as carbon nanotube versions.
and carbon nanotubes that could be woven into clothing. At the time these fibers were said to obtain the highest volumetric energy density reported for carbon-based microscale supercapacitors (6. 3 microwatt-hours per cubic millimeter,
However carbon nanotubes are still expensive not to mention the fact that there is still some debate about their possible toxicity.
The fiber, made from sheets of carbon nanotubes wrapped around a rubber core, can be stretched to 14 times its original length
In research published in the journal Science, the team describes how they devised a method for wrapping electrically conductive sheets of carbon nanotubes around the rubber core in such a way that the fiber's resistance doesn change when stretched,
but its conductivity increases. e make the inelastic carbon nanotube sheaths of our sheath-core fibers super stretchable by modulating large buckles with small buckles,
and then another carbon nanotube sheath to create strain sensors and artificial muscles. In this setup, the buckled nanotube sheets act as electrodes
The only exotic component is the carbon nanotube aerogel sheet used for the fiber sheath
#The First White Laser Scientists and engineers at Arizona State university, in Tempe, have created the first lasers that can shine light over the full spectrum of visible colors.
#Carbon nanotube-Based Water Desalination and Purification Technology Awarded Patent Mitra's new carbon nanotube immobilized membrane (CNIM) is an energy-efficient device designed to filter higher concentrations of salt than is currently feasible through reverse osmosis, one of the standard
Mitra, who has conducted research on carbon nanotubes for the past 15 years created a novel architecture for the membrane distillation process by immobilizing carbon nanotubes,
which are an atom thick and about 10,000 times smaller than a human hair in diameter, in the membrane pores.
"One of the key characteristics of carbon nanotubes is their capacity to both rapidly absorb water vapor as well as industrial contaminants,
The research project involves the minute vibrations of carbon nanotubes called"phonons, "which greatly enhance the diffusion of water through sanitation filters.
Wrapping carbon nanotube sheets into fibers In a study published in the July 24 issue of the journal Science,
electrically conductive sheets of tiny carbon nanotubes to form a jellyroll-like sheath around a long rubber core.
senior author of the paper and director of the Alan G. Macdiarmid Nanotech Institute at UT Dallas. One key to the performance of the new conducting elastic fibers is the introduction of buckling into the carbon nanotube
the Robert A. Welch Distinguished Chair in Chemistry at UT Dallas. e make the inelastic carbon nanotube sheaths of our sheath-core fibers super stretchable by modulating large buckles with small buckles,
Radical electronic and mechanical devices possible By adding a thin overcoat of rubber to the sheath-core fibers and then another carbon nanotube sheath
she said. he only exotic component is the carbon nanotube aerogel sheet used for the fiber sheath. o
Unlike their predecessors, the team at IBS stayed away from things like carbon nanotubes and gold and looked at a more utilitarian option for their build material:
Professor Cronin's research spans a broad range of topics including electrical and spectroscopic characterization of carbon nanotubes, graphene,
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.
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,
2015iranian Scientists Evaluate Dynamic Interaction between 2 Carbon nanotubes April 14th, 2015memory Technology Moving sector walls on the nano scale June 6th,
Rice-led experiments demonstrate solid-state carbon nanotube'templates'June 15th, 2015materials/Metamaterials Designer electronics out of the printer:
electrically conductive sheets of tiny carbon nanotubes to form a jellyroll-like sheath around a long rubber core.
senior author of the paper and director of the Alan G. Macdiarmid Nanotech Institute at UT Dallas. One key to the performance of the new conducting elastic fibers is the introduction of buckling into the carbon nanotube
the Robert A. Welch Distinguished Chair in Chemistry at UT Dallas."We make the inelastic carbon nanotube sheaths of our sheath-core fibers super stretchable by modulating large buckles with small buckles,
"By adding a thin overcoat of rubber to the sheath-core fibers and then another carbon nanotube sheath,
"The only exotic component is the carbon nanotube aerogel sheet used for the fiber sheath.""Last year, UT Dallas licensed to Lintec of America a process Baughman's team developed to transform carbon nanotubes into large-scale structures, such as sheets.
Lintec opened its Nanoscience & Technology Center in Richardson, Texas, less than 5 miles from the UT Dallas campus,
to manufacture carbon nanotube aerogel sheets for diverse applications.#####The Science research was supported by the Air force Office of Scientific research, the Robert A. Welch Foundation, the U s army, the National institutes of health, the National Science Foundation and the Office of Naval Research.
and multiwalled carbon nanotubes were used in its structure. Carbon nanotubes have unique properties and they have numerous applications in the production of nanocomposite membranes.
However, the heterogeneous distribution of nanoparticles in the structure of the membrane polymer can be considered as an important problem.
and aligned than carbon nanotubes, another material under investigation for membrane separation. Kumar and co-authors report their development in a recent issue of the Proceedings of the National Academy of Science."
and Patchable Strain Sensor for Humanmachine Interfaces Comprising a Nanohybrid of Carbon nanotubes and Conductive Elastomers"),could help robot developers make their machines more human.
The researchers created a stretchable and transparent sensor by layering a carbon nanotube film on two different kinds of electrically conductive elastomers.
#Researchers grind nanotubes to get nanoribbons (w/video) A simple way to turn carbon nanotubes into valuable graphene nanoribbons may be to grind them,
The research by Ajayan and his international collaborators appears in Nature Communications("Ambient solid-state mechano-chemical reactions between functionalized carbon nanotubes".
In their tests, the researchers prepared two batches of multi-walled carbon nanotubes, one with carboxyl groups and the other with hydroxyl groups attached.
and gather data about reactions that can be observed only as they are happening inside a battery("Probing Lithium Germanide Phase Evolution and Structural Change in a Germanium-in-Carbon nanotube Energy storage system").
Carbon nanotubes, seamless cylinders of graphene, do not display a total dipole moment, he said. While not zero, the vector-induced moments cancel each other out.
graphene, a conductive polymer and carbon nanotubes, which are atom-thick latticelike networks of carbon formed into cylinders.
and the carbon nanotubes carefully inserted between the graphene layers to form a self-assembled flat-packed,
The result was a 3d shape with, thanks to the carbon nanotubes, a massive surface area, excellent charge capacity that is also foldable.
and aligned than carbon nanotubes, another material under investigation for membrane separation. Kumar and co-authors report their development in a recent issue of the Proceedings of the National Academy of Science("Highly permeable artificial water channels that can self-assemble into two-dimensional arrays"."
The researchers were also able to insert carbon nanotubes into the dry object so that it could conduct electricity.
the team carefully engineered a 3d supercapacitor with carbon nanotube electrodes, and a hybrid battery. Both of them were fully functional even at 75 percent compression,
#Carbon nanotube finding could lead to flexible electronics with longer battery life Led by materials science Associate professor Michael Arnold
and Professor Padma Gopalan the team has reported the highest-performing carbon nanotube transistors ever demonstrated. In addition to paving the way for improved consumer electronics this technology could also have specific uses in industrial and military applications.
In a paper published recently in the journal ACS Nano Arnold Gopalan and their students reported transistors with an on-off ratio that's 1000 times better and a conductance that's 100 times better than previous state-of-the-art carbon nanotube transistors.
Carbon nanotubes are very strong and very flexible so they could also be used to make flexible displays
Carbon nanotubes are single atomic sheets of carbon rolled up into a tube. As some of the best electrical conductors ever discovered carbon nanotubes have long been recognized as a promising material for next-generation transistors
which are semiconductor devices that can act like an on-off switch for current or amplify current. This forms the foundation of an electronic device.
However researchers have struggled to isolate purely semiconducting carbon nanotubes which are crucial because metallic nanotube impurities act like copper wires and short the device.
Until now these two challenges have limited the development of high-performance carbon nanotube transistors. Building on more than two decades of carbon nanotube research in the field the UW-Madison team drew on cutting-edge technologies that use polymers to selectively sort out the semiconducting nanotubes achieving a solution of ultra-high-purity semiconducting carbon nanotubes.
Previous techniques to align the nanotubes resulted in less than-desirable packing density or how close the nanotubes are to one another
In that technique researchers exploited a self-assembly phenomenon triggered by rapidly evaporating a carbon nanotube solution.
The team's most recent advance also brings the field closer to realizing carbon nanotube transistors as a feasible replacement for silicon transistors in computer chips
With these results we've really made a leap in carbon nanotube transistors. Our carbon nanotube transistors are an order of magnitude better in conductance than the best thin film transistor technologies currently being used commercially
while still switching on and off like a transistor is supposed to function. The researchers have patented their technology through the Wisconsin Alumni Research Foundation
"Unlike other ultra strong materials such as carbon nanotubes, Kevlar is said an insulator Nicholas Kotov, the Joseph B. and Florence V. Cejka Professor of Engineering."
Unlike their predecessors, the team at IBS stayed away from things like carbon nanotubes and gold and looked at a more utilitarian option for their build material:
and aligned than carbon nanotubes, another material under investigation for membrane separation. Kumar and co-authors report their development in a recent issue of the Proceedings of the National Academy of Science."
#Carbon nanotube finding could lead to flexible electronics with longer battery life University of Wisconsin-Madison materials engineers have made a significant leap toward creating higher-performance electronics with improved battery life and the ability to flex
the team has reported the highest-performing carbon nanotube transistors ever demonstrated. In addition to paving the way for improved consumer electronics,
Gopalan and their students reported transistors with an on-off ratio that 1, 000 times better and a conductance that 100 times better than previous state-of-the-art carbon nanotube transistors. arbon nanotubes are very strong and very flexible,
Carbon nanotubes are single atomic sheets of carbon rolled up into a tube. As some of the best electrical conductors ever discovered
carbon nanotubes have long been recognized as a promising material for next-generation transistors, which are semiconductor devices that can act like an on-off switch for current
However, researchers have struggled to isolate purely semiconducting carbon nanotubes, which are crucial, because metallic nanotube impurities act like copper wires and hortthe device.
Until now, these two challenges have limited the development of high-performance carbon nanotube transistors. Building on more than two decades of carbon nanotube research in the field
the UW-Madison team drew on cutting-edge technologies that use polymers to selectively sort out the semiconducting nanotubes,
achieving a solution of ultra-high-purity semiconducting carbon nanotubes. Previous techniques to align the nanotubes resulted in less than-desirable packing density,
In that technique, researchers exploited a self-assembly phenomenon triggered by rapidly evaporating a carbon nanotube solution.
The team most recent advance also brings the field closer to realizing carbon nanotube transistors as a feasible replacement for silicon transistors in computer chips and in high-frequency communication devices,
wee really made a leap in carbon nanotube transistors. Our carbon nanotube transistors are an order of magnitude better in conductance than the best thin film transistor technologies currently being used commercially
while still switching on and off like a transistor is supposed to function. The researchers have patented their technology through the Wisconsin Alumni Research Foundation
or even to growing arrays of carbon nanotubes, which his group is also studying. his is high-quality research that represents significant progress on the path to scalable production methods for large-area graphene,
Carbon nanotubes, seamless cylinders of graphene, do not display a total dipole moment, he said. While not zero, the vector-induced moments cancel each other out.
which was able to simulate water flow in carbon nanotubes at very low speeds an activity that would normally require the equivalent of up to 40,000 years of processing power on a single computer.
simulations of water flow in carbon nanotubes could only be carried out under unrealistically high flow-rate conditions says the Director of CNMM, Quanshui Zheng. hanks to World Community Grid,
Ultimately this will help design new carbon nanotube based membranes for water filtration with reduced energy consumption. rowd-sourced computing power was essential to the success of our project.
Associate professor Shen explains the ongoing research. e plan to explicitly include the effects of defects in carbon nanotubes,
electrically conductive sheets of tiny carbon nanotubes to form a jellyroll-like sheath around a long rubber core.
senior author of the paper and director of the Alan G. Macdiarmid Nanotech Institute at UT Dallas. One key to the performance of the new conducting elastic fibers is the introduction of buckling into the carbon nanotube
the Robert A. Welch Distinguished Chair in Chemistry at UT Dallas. e make the inelastic carbon nanotube sheaths of our sheath-core fibers super stretchable by modulating large buckles with small buckles,
By adding a thin overcoat of rubber to the sheath-core fibers and then another carbon nanotube sheath,
she said. he only exotic component is the carbon nanotube aerogel sheet used for the fiber sheath.
Last year, UT Dallas licensed to Lintec of America a process Baughman team developed to transform carbon nanotubes into large-scale structures, such as sheets.
to manufacture carbon nanotube aerogel sheets for diverse applications c
#New receptor for controlling blood pressure discovered High blood pressure is a primary risk factor in the development of many cardiovascular diseases.
In their tests, the researchers prepared two batches of multi-walled carbon nanotubes, one with carboxyl groups and the other with hydroxyl groups attached.
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