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Search results for “Carbon Nanotubes”

1,000+ results for "Carbon Nanotubes"

Diamonds, nanotubes find common ground in graphene

Scientists at Rice University and Honda Research Institute have created a hybrid material that combines diamonds, nanotubes, and graphene for superior thermal management. The researchers successfully grew vertically aligned carbon nanotubes on diamond using graphene as a middleman, demonstrating its potential as a heat sink.

SourceRice University·JournalScientific Reports·DateMay 28, 2013

National study of nanomaterial toxicity sets stage for policies to address health risks

A national study on nanomaterial toxicity has provided comparable health risk data, enabling regulators to develop policies to protect workers and consumers. The researchers found that carbon nanotubes caused inflammation in the lower regions of the lung, but made them less hazardous by modifying their structure.

SourceNorth Carolina State University·JournalEnvironmental Health Perspectives·DateMay 6, 2013

'Going negative' pays for nanotubes

Researchers at Rice University have discovered a way to create liquid crystals from negatively charged carbon nanotubes, allowing for easier functionalization and potentially leading to stronger, more conductive fibers. This breakthrough could significantly improve the creation of macro materials out of microscopic nanotubes.

SourceRice University·JournalACS Nano·DateMay 3, 2013

Shaking things up: NIST researchers propose new old way to purify carbon nanotubes

A team at NIST has developed a simple and cost-effective way to separate metallic from semiconducting carbon nanotubes, paving the way for high-purity samples in electronics applications. The method uses liquid extraction with subtle differences in polymer hydrophobicity, yielding high-resolution results.

SourceNational Institute of Standards and Technology (NIST)·JournalJournal of the American Chemical Society·DateMay 1, 2013

Rice builds nanotube photodetector

Researchers at Rice University have developed a nanotube-based photodetector that can detect light across the visible and infrared spectrum. The device, made from extra-long carbon nanotubes, promises to make possible new optoelectronic devices, solar cells, and specialized cameras.

SourceRice University·JournalScientific Reports·DateFeb 27, 2013

INRS develops a nanohybrid with remarkable properties using a new laser-plasma process

Researchers at INRS Énergie Matériaux Télécommunications Centre developed a novel nanohybrid structure combining carbon nanotubes and lead sulfide nanoparticles using pulsed laser ablation technique. The new material exhibits strong photoresponse, fast photocurrent response time and spectrally wide photoactivity.

James' bond: A graphene/nanotube hybrid

Researchers successfully grew forests of carbon nanotubes on a sheet of graphene, creating a seamless three-dimensional structure with a massive surface area. This hybrid material offers great potential for electronic components like fast supercapacitors.

SourceRice University·JournalNature Communications·DateNov 27, 2012

USC scientists 'clone' carbon nanotubes to unlock their potential for use in electronics

A team of USC researchers has successfully grown carbon nanotube semiconductors with predefined structures, paving the way for their potential use in future electronics. The breakthrough, known as 'nanotube cloning,' involves using pre-selected and separated carbon nanotubes as seeds to control the growth of longer nanotubes.

SourceUniversity of Southern California·JournalNature Communications·DateNov 14, 2012

New form of carbon observed

Scientists at Carnegie Institution have observed a new form of very hard carbon clusters that are unusual in their mix of crystalline and disordered structure. These clusters can indent diamond, indicating they are superhard, and their unique structure has potential applications for various uses.

'Sifting' liquid at the molecular level

Researchers develop method for separating liquids using individual carbon nanotubes, which act as separation channels for chemically distinct molecules. This technology could prove useful in forensic studies and analyzing molecules from single cells, enabling analysis of trace evidence and invisible stains.

SourceDrexel University·JournalScientific Reports·DateJul 17, 2012

Tiny bubbles snap carbon nanotubes like twigs

Researchers at Rice University detail the exact mechanism of how carbon nanotubes bend and break when subjected to ultrasonic vibrations in a liquid. The study reveals that long and short nanotubes behave differently, with shorter tubes stretching and longer ones bending before snapping.

SourceRice University·JournalProceedings of the National Academy of Sciences·DateJul 9, 2012

Nano-infused paint can detect strain

A new type of paint made with carbon nanotubes can help detect strain in buildings, bridges, and airplanes. This method provides a big advantage over conventional strain gauges, which must be physically connected to their read-out devices.

SourceRice University·JournalNano Letters·DateJun 21, 2012

In nanotube growth, errors are not an option

The study found that iron is the best and quickest catalyst to heal topological defects in nanotubes, which are critical for advanced materials. The researchers determined that healing occurs in a small zone near the catalyst and can happen in a fraction of a millisecond.

SourceRice University·JournalPhysical Review Letters·DateJun 19, 2012

Stanford engineers perfecting carbon nanotubes for highly energy-efficient computing

A team of Stanford engineers has made breakthroughs in carbon nanotube circuits, providing a ten-times improvement in energy efficiency over silicon. They have overcome major barriers, including alignment and metallic contamination, using a unique imperfection-immune design paradigm.

SourceStanford University School of Engineering·JournalIEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems·DateJun 14, 2012

Electronic nose out in front

A new DNA-based chemical sensor has been developed, capable of discriminating between very similar molecules, even at low concentrations. The system uses carbon nanotubes and fine-tuned DNA strands to produce a measurable electrical signal when exposed to target chemicals.

SourceAmerican Institute of Physics·JournalAIP Advances·DateMay 2, 2012

Nanosponges soak up oil again and again

Researchers at Rice University and Penn State University discovered a material that can absorb oil spilled in water due to the addition of boron to carbon nanotubes. The nanosponges have a high surface area, conduct electricity, and can be manipulated with magnets.

SourceRice University·JournalScientific Reports·DateApr 16, 2012

Pitt researchers coax gold into nanowires

Researchers at the University of Pittsburgh have created a self-assembly method to grow gold nanowires, which can be used to detect poisonous gases such as hydrogen sulfide in natural gas. The gold nanowires are highly conductive and can detect gas levels comparable to existing sensing techniques.

SourceUniversity of Pittsburgh·JournalJournal of the American Chemical Society·DateFeb 21, 2012

Perfect nanotubes shine brightest

Researchers found that longer carbon nanotubes emit more light at near-infrared wavelengths, while shorter tubes are dimmer due to imperfections. The study reveals insights into how growth methods and processing can improve nanotube fluorescence.

SourceRice University·JournalACS Nano·DateJan 31, 2012

Rice professor's nanotube theory confirmed

Air Force Research Laboratory experiment confirms Boris Yakobson's theory that chirality of nanotubes determines their growth speed and armchair nanotubes grow fastest. The study provides a basis for further research into growing specific types of nanotubes with desired properties.

SourceRice University·JournalNature Materials·DateJan 30, 2012

Scientists solve mystery of colorful armchair nanotubes

Researchers at Rice University have figured out the source of colorful armchair nanotubes: hydrogen-like objects called excitons. The team found that exciton resonance occurs around a unique electronic structure in these one-dimensional materials, making them visible to our eyes.

SourceRice University·JournalJournal of the American Chemical Society·DateJan 9, 2012