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Carbon nanotubes pinned down at last

June 1, 2006

A new process that bonds carbon nanotubes to silicon to create transistors could lead eventually lead to large-scale integration of nanoelectronic devices.

Carbon nanotubes may protect DNA from oxidation

November 16, 2012

Scanning electron microscope image of a typical sample of the NIST single-wall carbon nanotube soot standard reference material. Recent NIST research suggests that, at least in the laboratory, carbon nanotubes may help protect DNA molecules from damage by oxidation. The image shows an area just over a micrometer wide. (Color added for clarity.) (Credit: Credit: Vladar/NIST)

Single-wall carbon nanotubes (SWCNTs) may help protect DNA molecules from damage by oxidation, researchers at the National Institute of Standards and Technology (NIST) have found.

In nature, oxidation is a common chemical process in which a reactive chemical removes electrons from DNA and may increase the chance for mutations in cells.

More studies are needed to see if the in vitro protective effect of… read more

Carbon nanotubes may lead to better brain electrodes and neuroprosthetic devices

December 22, 2008

Researchers at the Ecole Polytechnique Federale de Lausanne (EPFL) have found that carbon nanotubes (CNTs), which are highly conductive and corrosion-resistant, form extremely tight contacts with neuronal cell membranes and could act as a new building block for novel “electrical bypass” systems for treating traumatic injury of the central nervous system.

CNTs could also replace metal parts in clinical applications such as deep brain stimulation for the treatment of… read more

Carbon nanotubes made into conductive, flexible ‘stained glass’

April 10, 2008

Northwestern University researchers have used metallic nanotubes to make thin films that are semitransparent, highly conductive, flexible and come in a variety of colors, with an appearance similar to stained glass.

These results could lead to improved, lower-cost products such as flat-panel displays and solar cells.

Carbon nanotubes light up

May 5, 2003

Scientists at IBM Research have obtained light from a carbon nanotube by a passing current through it. The device could be used to fabricate ultra-small optoelectronics devices for applications in high-speed communications.

Carbon Nanotubes Improve Protein Array Detection Limits

November 21, 2008

To detect cancer as early as possible, dozens of research groups are developing methods to detect trace levels of cancer-related proteins and genes in blood or other biological samples. The latest: carbon nanotubes can serve as highly sensitive optical labels for use in a wide variety of assay systems.

Researchers at Stanford University and the Center for Cancer Nanotechnology Excellence Focused on Therapeutic Response have developed a new type… read more

Carbon nanotubes help heal broken bones

July 8, 2005

Carbon nanotubes make an ideal scaffold for the growth of bone tissue, chemist Robert Haddon of the University of California, Riverside, has found.

The new technique could change the way doctors treat broken bones, allowing them to simply inject a solution of nanotubes into a fracture to promote healing.

Bone tissue is a natural composite of collagen fibers and hydroxyapatite crystals. Haddon and his coworkers have demonstrated for… read more

Carbon nanotubes generate electricity that could be harnessed for new energy systems

March 8, 2010

Carbon Nanotubes with a Lit Fuel Coating

Carbon nanotubes with a lit fuel coating generate an electrical current, the result of a fast-moving combustion wave (thermal wave) traveling along the length of the carbon nanotube that drags electrons along, MIT scientists have discovered.

The system puts out about 100 times greater energy in proportion to its weight than a lithium-ion battery. In theory, says Michael Strano, MIT’s Charles and Hilda Roddey Associate Professor… read more

Carbon nanotubes found to create blood clots in medical devices

January 26, 2015

Scanning electron micrographs of multiwall-carbon-nanotube-modified PVC prior to (top) and after (bottom) perfusion, showing platelet aggregation (credit: Alan M. Gaffney et al./Nanomedicine)

Scientists in the School of Pharmacy and Pharmaceutical Sciences in Trinity College Dublin, have discovered that using carbon nanotubes as biomaterials that come into contact with blood generates blood clots.

The reason: When blood comes into contact with foreign surfaces, the blood’s protective platelets are activated, creating blood clots.

This can be catastrophic in clinical settings where extracorporeal circulation technologies are used, such as during… read more

Carbon nanotubes found safe in mouse study

February 1, 2008

Stanford University researchers have conducted a systematic circulation and excretion study that they believe allays worries that carbon nanotubes, by simply remaining in the organs for a long time, would prove toxic to a mouse.

They found the nanotubes leave the body primarily through the feces, with some by way of the urine.

Their previous research has demonstrated the potential for using nanotubes in treating cancerous cells and… read more

Carbon nanotubes form ultrasensitive biosensor to detect proteins

June 28, 2010

A cluster of carbon nanotubes coated with a thin layer of protein-recognizing polymer form a biosensor capable of using electrochemical signals to detect minute amounts of human ferritin proteins, Boston College researchers have found.

The team used arrays of wire-like nanotubes coated with a non-conducting polymer coating capable of recognizing proteins with subpicogram per liter sensitivity.

The biosensor could provide a crucial new diagnostic tool for the detection… read more

Carbon nanotubes’ electronic properties optimized for future applications

August 29, 2007

University of Notre Dame researchers have demonstrated nanotubes’ ability to capture and store one electron per 32 carbon atoms in a single-wall carbon nanotube.

The stored electrons can be readily discharged on demand with the addition of an electron-accepting dye, significantly increasing the photocurrent and photoconductivity of electrical systems.

The results should improve the miniaturization of storage batteries.

Carbon nanotubes dramatically improve lithium battery energy capacity

June 21, 2010

MIT researchers have found that using carbon nanotubes for one of the battery’s electrodes produced a significant increase — up to tenfold — in the amount of power it could deliver from a given weight of material, compared to a conventional lithium-ion battery.

This performance can be attributed to good conduction of ions and electrons in the electrode, and efficient lithium storage on the surface of the nanotubes.… read more

Carbon Nanotubes Detect Lung Cancer Markers in the Breath

November 21, 2008

Using an array of nanotube devices, each coated with a different organic material, researchers at the Israel Institute of Technology have developed diagnostic system that may be able to diagnose lung cancer simply by sampling a patient’s breath.

Carbon nanotubes create underwater sonar speakers

June 14, 2010

Engineers at the University of Texas at Dallas have created an underwater speaker using thin sheets of nanotubes, which they hope could provide a lightweight alternative to the sound projectors used in long-range sonar.

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