Tag

Carbon Nanotubes

All articles tagged with #carbon nanotubes

technology1 month ago•4 min saved

Space elevators: could we climb to orbit on a 100,000-km tether?

A space elevator could, in theory, haul cargo and passengers to orbit via a ground-anchored tether extending ~100,000 km, balanced by a counterweight and powered by electricity from solar or ground-based sources. It promises dramatically cheaper, cleaner access to space, but faces huge hurdles: materials stronger than anything we can currently manufacture (carbon nanotubes at requisite lengths), relentless orbital debris, and massive political and financial coordination requirements. For now it remains a visionary concept rather than an imminent reality.

via BBC Sky at Night Magazine|

#carbon-nanotubes #geostationary-orbit #renewable-energy

science2 months ago•24 min saved

Ultra-dark automotive coating blends carbon black and nanotubes to trap 99.9% of light

Researchers have developed a new ultrablack coating for cars by combining carbon black pigment with carbon nanotubes in a structure that traps light, achieving absorption of more than 99.9% of visible light while meeting humidity, water-resistance, and adhesion tests and compatible with standard spray-coating processes. This approach aims to overcome manufacturability and durability limits of nanotube-only coatings like Vantablack, potentially enabling luxury, deeply black finishes in automotive and other applications.

via C&EN|

#automotive #carbon-black #carbon-nanotubes

technology2 months ago•3 min saved

Ultra-Black Car Paint Promises 99.9% Light Absorption for Luxury Finishes

Singapore-based Nipsea Group developed a carbon-nanotube-based ultra-black coating that absorbs about 99.9% of visible light, rivaling Vantablack, and remains stable under heat and humidity with an adhesion test passing, signaling potential for deep-black automotive finishes but requiring further work before commercial use.

via Gizmodo|

#automotive-coatings #carbon-nanotubes #light-absorption

technology3 months ago•72 min saved

Hair-thin nanotube shield could protect future space tech from radiation

Scientists have developed a stretchable, ultra-thin shielding material made from carbon and boron nitride nanotubes that blocks electromagnetic radiation (99.999%) and neutron radiation (72%), and can be 3D-printed. When formed in a honeycomb shape, shielding improves by about 15%. This lightweight, flexible material could protect equipment and astronauts across satellites, space stations, and other space tech, with the study published in Advanced Materials.

via Space|

#boron-nitride-nanotubes #carbon-nanotubes #nanomaterials

science4 months ago•6 min saved

Doped nanotube fibers push toward copper-like wiring performance.

Researchers doped bulk double-walled carbon nanotube fibers with tetrachloroaluminate (AlCl4−), boosting mean conductivity about 10x on average (up to 15x in the best fibers) and reaching roughly 70% of aluminum’s conductivity; when normalized by density, the doped fibers can outperform copper, suggesting potential for lightweight, high-capacity wiring. However, the dopant is air-sensitive and short-lived (weeks) unless the fibers are polymer-coated, posing stability and scalability challenges even as the approach identifies a promising dopant strategy.

via Ars Technica|

#carbon-nanotubes #conductivity #copper

science7 months ago•9 min saved

Moon soil reveals naturally formed carbon nanotubes, reshaping space manufacturing

Scientists analyzing lunar samples from China’s Chang’e-6 mission identified single-walled carbon nanotubes formed in situ on the Moon, likely created by micrometeorite impacts and iron‑catalyzed reactions under early volcanic and solar-wind conditions; this provides the first evidence that natural space environments can synthesize such nanostructures and suggests lunar resources could support future electronics manufacturing.

via Interesting Engineering|

#carbon-nanotubes #change-6 #in-situ-resource-utilization

science-and-technology8 months ago•3 min saved

Cambridge Reactor Recycles 99% of Gas for Hydrogen Fuel and Carbon

Researchers at Cambridge University have developed a multi-pass methane pyrolysis process that recycles 99% of gas to produce high-quality carbon nanotubes and clean hydrogen fuel without emitting CO2, significantly improving efficiency and reducing waste in hydrogen and nanotube production.

via Interesting Engineering|

#cambridge-university #carbon-capture #carbon-nanotubes

science9 months ago•3 min saved

Scientists Develop Ultra-Strong, Thin Bulletproof Fiber Superior to Kevlar

Scientists at Peking University have developed a new composite fiber combining heterocyclic aramid and aligned carbon nanotubes, resulting in a material that surpasses Kevlar in strength, toughness, and energy absorption, potentially leading to lighter and more effective protective gear.

via Phys.org|

#bulletproof-fiber #carbon-nanotubes #high-strength-materials

technology10 months ago•2 min saved

Top 5 Materials for Radar-Defying Fighter Jets

Researchers are exploring five advanced materials—metamaterials, graphene, MXene, carbon nanotubes, and ceramics—that could significantly enhance aircraft stealth capabilities by absorbing or deflecting radar signals, potentially making fighter jets nearly invisible to radar in the future.

via WION|

#advanced-ceramics #carbon-nanotubes #graphene

technology1 year ago•2 min saved

Carbon Nanotubes: The Future of High-Energy Clean Storage

Researchers are exploring carbon nanotubes as a potential alternative to lithium-ion batteries, offering three times more energy storage per unit mass and greater temperature resilience. These nanotubes, which are stronger than steel, could revolutionize energy storage in medical devices by harvesting energy from body movements. While not yet ready to replace lithium-ion batteries in consumer electronics, carbon nanotubes present a promising future for clean energy solutions.

via Yahoo! Voices|

#carbon-nanotubes #clean-energy #energy-storage

science-and-technology2 years ago•4 min saved

"Pollutant Key to Advancing Carbon Nanotube Films for Tech Applications"

Skoltech scientists have discovered that treating carbon nanotube films with nitrogen dioxide at 300 degrees Celsius significantly enhances their electrical conductivity, transparency, and stability. This fast, scalable, and wasteless technique could improve the performance of solar panels, touchscreens, and other devices, offering a superior alternative to current doping agents.

via Phys.org|

#carbon-nanotubes #doping-agents #nitrogen-dioxide

science-and-technology2 years ago•20 min saved

"Revolutionary Plasma Technology Enables High-Temperature Synthesis in Stable Atmospheric Conditions"

Researchers have developed a stable atmospheric-pressure plasma that enables extreme-temperature synthesis for various applications, including thin film deposition and carbon nanotube synthesis. The plasma, created using a novel electrode configuration, exhibits improved stability and avoids the instabilities typically associated with atmospheric plasmas. This breakthrough opens up new possibilities for high-temperature material synthesis and processing.

via Nature.com|

#atmospheric-plasma #carbon-nanotubes #extreme-temperature-synthesis

science-and-technology2 years ago•3 min saved

"Nanotube Revolution: Expanding the Family Beyond Carbon"

Researchers from Tokyo Metropolitan University have successfully engineered a range of new single-walled transition metal dichalcogenide (TMD) nanotubes with different compositions, chirality, and diameters by using boron-nitride nanotubes as templates. This breakthrough allows for the synthesis of diverse nanotube structures, providing insights into their growth mechanism and unique optical properties. The team also discovered randomly distributed chiral angles in the nanotubes, offering new understanding of the relationship between chirality and electronic states. The ability to create a variety of TMD nanotubes opens up possibilities for exploring their exotic properties and applications in semiconductors.

via Phys.org|

#boron-nitride-nanotubes #carbon-nanotubes #chirality

science-and-technology2 years ago•5 min saved

"Nanoscale Marvels: Harnessing Carbon-Based Quantum Technology"

Researchers at Empa, in collaboration with international teams, have successfully contacted individual graphene nanoribbons using carbon nanotube electrodes. Graphene nanoribbons, which have unique electrical, magnetic, and optical properties, hold great potential for quantum technology applications. The researchers overcame the challenge of accessing and contacting the extremely narrow nanoribbons by using carbon nanotubes of similar size. The success of this experiment opens up possibilities for studying fundamental quantum effects and developing applications in quantum switching, sensing, and energy conversion. Further research aims to manipulate different quantum states on a single nanoribbon and explore the use of nanoribbons as highly efficient energy converters.

via SciTechDaily|

#carbon-nanotubes #graphene-nanoribbons #nanoscale

technology3 years ago•5 min saved

Advancements in Carbon Nanotube Transistors: Scaling to Sub-10 nm Nodes

Researchers from Peking University and other institutes in China have demonstrated the scaling of carbon nanotube transistors to below sub-10 nm nodes, potentially outperforming silicon-based transistors. By implementing a new contact scheme called "full contact," the researchers were able to downscale the carbon nanotube transistors while maintaining their performance advantages. This breakthrough could lead to the development of smaller and more efficient carbon nanotube-based transistors, with implications for the advancement of electronics.

via Phys.org|

#carbon-nanotubes #electronics #scaling