Articles tagged with Nanotubes
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Researchers at Brown University have developed a method to cut single-walled carbon nanotubes with precision, enabling the creation of higher-quality nanotubes for various applications. The technique involves sonicating the nanotubes in water, causing them to fracture due to compressive atom ejection.
Rice University physicists have created a formula to calculate the energies of graphene cut at any angle, which could lead to controlling the chirality of nanotubes. This breakthrough has profound implications for nanotube growth and offers rational ways to control their symmetry.
Rice University researchers found that adding tiny amounts of ozone to single-walled carbon nanotubes decorates them with oxygen atoms, enhancing their near-infrared fluorescence intensity and shifting the wavelength. The process is simple enough for a physical chemist to do, and lab tests showed stable fluorescent properties for months.
Duke University researchers discovered that smaller catalyst particle size is crucial for improving efficiency in chemical reactions. The team found that the surface-to-volume ratio of the catalyst particle is more important than previously thought, leading to faster reactions.
Researchers at the University of Michigan have created intricate, curving 3-D nanostructures from carbon nanotubes using capillary action forces. These shapes can harness the exceptional mechanical, thermal, electrical, and chemical properties of carbon nanotubes in a scalable fashion.
Researchers at MIT have successfully stored energy in carbon nanotubes using a thermopower process, which converts chemical energy into electricity. This breakthrough could lead to the development of more efficient power generation and storage systems.
New studies on carbon nanotubes indicate they are at least 117 times stronger than steel and 30 times stronger than Kevlar, expanding commercial and industrial applications.
Researchers at MIT have created a way to funnel solar energy using carbon nanotubes, allowing for smaller and more powerful solar arrays. The technology could increase the efficiency of photovoltaic cells by concentrating photons into tiny spots with antennas that capture and focus light energy.
A team of researchers at Boston College has developed a biosensor using carbon nanotubes that can detect minute amounts of proteins with high sensitivity. The sensor can distinguish between different varieties of the same protein and could potentially be used to diagnose diseases such as human papillomavirus.
Researchers at MIT developed a new electrode material using carbon nanotubes, showing a significant increase in power capacity and stability. The material enables high-power outputs with good conductivity and efficient lithium storage.
Researchers at Rice University have discovered thin films of nanotubes created with ink-jet printers can be used to make field-effect transistors. The technique allows for the creation of digital electronics on flexible substrates, with potential applications in raincoats and other devices.
Scientists at Rice University have made a breakthrough in creating highly purified samples of carbon nanotube species using ultracentrifugation, a technique that can help enable the development of efficient nationwide electrical grids and critical applications in medicine and electronics.
A team led by University of Wisconsin-Madison chemist Song Jin shows that a screw dislocation drives the growth of hollow zinc oxide nanotubes. The finding provides new insight into the processes guiding the formation of smallest manufactured structures, a significant challenge in nanoscience and nanotechnology.
Researchers at McGill University have developed DNA nanotubes that can encapsulate and release materials, such as drugs. These nanotubes could potentially be used to deliver targeted treatments for diseases like cancer.
Researchers at Imperial College London discovered that natural killer cells use membrane nanotubes to ensnare and destroy tumour cells and virus-infected cells. This new mechanism increases the cells' chance of killing their target cells from a distance, significantly improving cancer treatment options.
Researchers used single-walled carbon nanotubes to study phase transition behavior of argon and krypton atoms. They found that the nanotube's electrical resistance changed when krypton atoms stuck to the surface, and demonstrated sensitivity to individual atom landings.
A strip of paper infused with carbon nanotubes can quickly and inexpensively detect microcystin-LR, a chemical compound produced by cyanobacteria, found in nutrient-rich waters. The biosensor works by measuring the electrical conductivity of the nanotubes in the paper, changing their conductivity when the toxin is present.
Researchers at Arizona State University use single-walled carbon nanotubes to accelerate DNA sequencing, detecting sharp spikes in electrical activity during DNA translocation. The technique has potential to speed up sequencing by thousands of times while reducing costs.
Researchers at NASA's Langley Research Center and the Department of Energy's Thomas Jefferson National Accelerator Facility developed a new technique to synthesize high-quality boron-nitride nanotubes, opening doors for various applications. The first practical macroscopic yarns were created using lasers, with potential uses in radiati...
Researchers at Rice University have made a breakthrough in industrial-scale nanotube processing, creating a method to produce pure carbon-nanotube fibers that could lead to advances in materials science and nanoelectronics. The process uses chlorosulfonic acid as a solvent, enabling the efficient production of high-quality nanotubes.
Researchers at the University of Michigan have developed brain implants coated with conducting polymer nanotubes, which can record neural signals better than conventional metal electrodes. The new implants may eventually lead to more effective treatment of neurological disorders like Parkinson's disease and paralysis.
Researchers at Case Western Reserve University have developed a method to control the structure and function of single-walled carbon nanotubes. By varying the composition of a metal catalyst, they can produce semiconducting nanotubes with desired properties, opening up new possibilities for applications such as medicine delivery and en...
Researchers at Cornell University created a simple solar cell using a single-walled carbon nanotube, which converts light to electricity in an extremely efficient process. The device produces more electrical current with higher levels of photon energy.
Researchers have discovered a way to effectively kill kidney tumors in nearly 80 percent of mice by injecting man-made nanotubes into the tumors and heating them with a laser. The study found that the higher the quantity of nanotubes injected, the longer the mice lived and the less tumor regrowth was seen.
The study provides the first experimental evidence of how individual carbon atoms are added to growing nanotubes. The rotation proceeds in discrete steps, resembling the halting motion of a mechanical clock's second hand, with approximately 24 steps per rotation.
Scientists successfully capture a single electron in a highly tunable carbon nanotube double quantum dot using ultraclean nanotubes. They also discovered a new type of tunneling analogous to Klein paradox, allowing electrons to pass through obstacles without sufficient energy.
A new nanotube-coated power measurement device has been developed at NIST, enabling faster and more accurate calibration of high-power laser systems. The device uses a sprayed-on coating of carbon nanotubes to conduct heat hundreds of times better than conventional materials.
Researchers at Sandia National Laboratories have created a device that can detect the entire visible spectrum of light using carbon nanotubes. The device uses chromophores and single-walled carbon nanotubes to trigger nerve impulses, enabling detection of colors of the rainbow.
Researchers at Stanford University have developed a new method to produce mass quantities of graphene nanoribbons, which are essential for electronics applications. The technique uses plasma etching to slice open carbon nanotubes, creating uniform ribbons with smooth edges.
Scientists at Rice University have found a way to produce ultrathin, electrically conductive nanoribbons using a room-temperature chemical process. These ribbons are made from graphene, the single-layer form of graphite, and exhibit remarkable strength and conductivity.
Researchers at Lehigh University have developed a new cooling method for carbon nanotube electronics by utilizing nonconventional radiation in a near-field zone, dissipating heat into the substrate. The method increases effective thermal conductance over the interface between nanotubes and polar substrates.
Researchers at Rensselaer Polytechnic Institute have discovered that incorporating treated carbon nanotubes into epoxy composites can significantly improve toughness and crack resistance. The study found a five-fold reduction in crack growth rate when subjected to repetitive stress.
MIT researchers create nanostitching to reinforce aerospace materials, resulting in 10 times stronger skins and over a million times more conductive properties. Carbon nanotubes are used to stitch together materials, improving bulk multifunctional properties with minimal cost increase.
Researchers at Rice University have created hybrid carbon nanotube metal oxide arrays as electrode material that may improve the performance of lithium-ion batteries. The new design could lead to longer-lasting electric cars and gadgets, as well as enhanced capabilities for electrochemical capacitors and fuel cells.
Carbon nanotube researchers at University of Illinois demonstrate remarkable increase in current-carrying capacity using avalanche process. The process creates multiple electron-hole pairs, leading to rapid increases in current until the nanotube breaks down.
Carbon nanotubes grow through self-assembly forming a 'tapestry' of twisting threads, where each thread's length determines the tube's growth rate. The research reveals a direct relationship between a nanotube's chiral angle and its growth speed.
Researchers at UC San Diego have developed a novel method to accelerate bone growth using nanotubes and stem cells, which could lead to quicker recovery times for patients undergoing orthopedic surgery. The new method uses mesenchymal stem cells placed on top of titanium oxide nanotubes to control cell differentiation into osteoblasts.
Researchers at NIST and Rice University have discovered a new method for self-assembling carbon nanotubes using bile acid, allowing for the creation of ordered, aligned arrangements of individual nanotubes. This process is inexpensive and does not require external magnetic or electrical fields.
Researchers at the Biodesign Institute, led by Hao Yan and Yan Liu, have successfully created 3D DNA nanotubes using gold nanoparticles, which can be used to form flexible and resilient structures. These nanostructures have potential applications in photometry, photovoltaics, touch screens, flexible displays, and biomedical advancements.
USC researchers have developed a low-temperature process to print dense lattices of transparent nanotube transistors on flexible bases, enabling the creation of high-performance electronics. The devices can be used for applications such as affordable car windshield displays and ultra-thin, low-power e-paper displays.
Scientists at NIST made precise measurements of nanotube concentrations for transparent conducting sheets, revealing the importance of uniform length for high-performance films. The study validated one theory, showing that longer nanotubes become electrically conducting at lower concentrations.
Physicists have made groundbreaking discoveries in various fields of research. Researchers created an 'invisibility cloak' for ocean-based structures to withstand tsunamis. Meanwhile, a team at Oxford University proposed that dark energy may be an illusion and instead, we live in a unique void in the universe. Additionally, scientists ...
Researchers at the University of Illinois have discovered the physical mechanism behind rapid water transport in carbon nanotubes. By orienting water molecules, the researchers found that a coupling between rotational and translational motions occurs, resulting in a helical motion through the nanotube.
Carbon nanotubes' true mechanical properties have been measured by Northwestern University researchers using a novel nanoscale material testing system. The results match quantum mechanics predictions and reveal that irradiation can strengthen the structure by forming bonds between shells of the tube.
Researchers at Stanford University have developed a new method using single-walled carbon nanotubes as delivery vehicles for cancer chemotherapy drugs. They found that the nanotubes can deliver up to 10 times more medication into tumor cells than traditional formulations, reducing side effects and improving treatment outcomes.
Researchers have discovered that naturally occurring nanotubes can form tunnels to protect retroviruses and bacteria from diseased to healthy cells. The nanotubes, which are recognized as tiny but important bodily channels, also aid in transporting bacteria to their doom and facilitating information exchange between cells.
The discovery of the precise peeling force of nanotubes could lead to the creation of new composite materials, medical devices and industrial applications. Researchers used atomic force microscopy to measure the forces and found that the nanotubes lift off unevenly due to van der Waals forces.
Researchers have successfully grown aligned and straight single-walled carbon nanotubes in large numbers using a quartz surface as a template. The achievement marks a significant step forward for the development of nano-scale electronics, which could enable the creation of ultra-tiny chips with improved performance.
The new guide offers techniques for characterizing the purity of SWCNT samples using thermogravimetric analysis, near-infrared spectroscopy, Raman spectroscopy, and optical microscopy. These methods aim to improve production processes, reduce impurities, and enhance the confidence of buyers and sellers in the market.
A new method using nanotechnology rapidly measures minute amounts of insulin, enabling real-time assessment of the body's insulin-producing cells. This breakthrough could improve the efficacy of a procedure for treating Type 1 diabetes, allowing diabetics to free themselves from insulin injections.
Carbon nanotubes have shown significant advantages in high-speed analog electronics, and researchers built the world's first all-nanotube transistor radios to prove it. The radios demonstrate the growth technique's success and pave the way for practical implementation of carbon-nanotube materials.
Researchers at Purdue University developed a new modeling technique to study and design miniature biosensors. The model explains why certain designs perform better than others and refutes long-held assumptions about sensor performance.
Researchers have found semiconducting nanotubes produced by living bacteria, opening the door to cheaper and more environmentally friendly manufacture of electronic materials. The discovery could lead to novel functionality for next-generation semiconductors in nano- and opto-electronic devices.
Researchers at Rice University successfully detected carbon nanotubes in living fruit flies using a technique called near-infrared fluorescent imaging. The study found that only a small percentage of the nanotubes were incorporated into the flies' organs, suggesting potential for early disease detection and monitoring.
Researchers created nanocavity-filled titanium oxide nanorods that are 25% more efficient at absorbing UVA and UVB radiation, making them ideal for sunscreen. The method involves simply heating titanate nanorods in air, transforming them into titanium oxide with regular polyhedral nanoholes.
Scientists at Vanderbilt University have overcome a major obstacle in producing fluorescent nanotubes, which can be used as contrast agents in cells and tissues. The breakthrough allows for the creation of trillions of nanotubes with high quantum efficiency, making them suitable for medical applications such as anti-cancer treatments.
Researchers used nanotechnology to study exciton mobility on carbon nanotubes, revealing that each excition travels about 90 nanometers and visits some 10,000 carbon atoms during its lifespan. The unique properties of carbon nanotubes made them an ideal system for observing single-molecule reactions.
Researchers create nanotubes to deliver therapeutic proteins or drugs in a highly-controlled manner, avoiding side effects and improving treatment outcomes. The method targets the drug where it is needed, reducing dosage and promoting better absorption.
Researchers at NIST found that short DNA-wrapped single-walled carbon nanotubes can selectively absorb into human lung cells, posing a potential health risk. The team's study suggests that the length of the nanotube plays a significant role in determining cellular uptake and toxicity.
Researchers have developed nanoelectrodes that can be used for electrochemical and biochemical sensing within living cells. The probes, which are 100 nanometers in diameter, can be controlled precisely where they penetrate a cell or pinpoint smaller structures like the nucleus or mitochondrion.