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Nanotubes in Biological News

MIT nanotubes sniff out cancer agents in living cells

CAMBRIDGE, Mass.--MIT engineers have developed carbon nanotubes into sensors for cancer drugs and other DNA-damaging agents inside living cells. The sensors, made of carbon nanotubes wrapped in DNA, can detect chemotherapy drugs such as cisplatin as well as environmental toxins and free radical...

Slipping through cell walls, nanotubes deliver high-potency punch to cancer tumors in mice

The problem with using a shotgun to kill a housefly is that even if you get the pest, you'll likely do a lot of damage to your home in the process. Hence the value of the more surgical flyswatter. Cancer researchers have long faced a similar situation in chemotherapy: how to get the most medica...

Livermore researchers use carbon nanotubes for molecular transport

LIVERMORE, Calif. - Molecular transport across cellular membranes is essential to many of life's processes, for example electrical signaling in nerves, muscles and synapses. In biological systems, the membranes often contain a slippery inner surface with selective filter regions made up of spec...

Spin control: New technique sorts nanotubes by length

Researchers at the National Institute of Standards and Technology (NIST) have reported* a new technique to sort batches of carbon nanotubes by length using high-speed centrifuges. Many potential applications for carbon nanotubes depend on the lengths of these microscopic cylinders, and one of the ...

Using carbon nanotubes to seek and destroy anthrax toxin and other harmful proteins

Troy, N.Y. Researchers at Rensselaer Polytechnic Institute have developed a new way to seek out specific proteins, including dangerous proteins such as anthrax toxin, and render them harmless using nothing but light. The technique lends itself to the creation of new antibacterial and antimicrobia...

Using nanotubes to detect and repair cracks in aircraft wings, other structures

Troy, N.Y. Adding even a small amount of carbon nanotubes can go a long way toward enhancing the strength, integrity, and safety of plastic materials widely used in engineering applications, according to a new study. Researchers at Rensselaer Polytechnic Institute have developed a simple new t...

UConn chemists find secret to increasing luminescence efficiency of carbon nanotubes

STORRS, Conn. - Chemists at the University of Connecticut have found a way to greatly increase the luminescence efficiency of single-walled carbon nanotubes, a discovery that could have significant applications in medical imaging and other areas. Increasing the luminescence efficiency of carbo...

The gold standard: Biodesign Institute researchers use nanoparticles to make 3-D DNA nanotubes

Arizona State University researchers Hao Yan and Yan Liu imagine and assemble intricate structures on a scale almost unfathomably small. Their medium is the double-helical DNA molecule, a versatile building material offering near limitless construction potential. In the January 2, 2009 issue o...

Researchers make breakthrough in the production of double-walled carbon nanotubes

In recent years, the possible applications for double-walled carbon nanotubes have excited scientists and engineers, particularly those working on developing renewable energy technologies. These tiny tubes, just two carbon atoms thick, are thin enough to be transparent, yet can still conduct elect...

Simulations help explain fast water transport in nanotubes

CHAMPAIGN, Ill. By discovering the physical mechanism behind the rapid transport of water in carbon nanotubes, scientists at the University of Illinois have moved a step closer to ultra-efficient, next-generation nanofluidic devices for drug delivery, water purification and nano-manufacturing. ...

Another type of nanotube, a how-to guide to making bamboo-structured carbon nanotubes

Nanotechnology is area if science that has recently captured the attention of people all around the world. At the heart of the nanotechnology revolution are carbon nanotubes, amazing materials with astonishing properties. They have applications in most fields, with new possibilities emerging regu...

Brightening prospects of using fluorescent nanotubes in medical applications

In a way, nanotubes are nature’s smallest candles. These tiny tubes are constructed from carbon atoms and they are so small that it takes about 100,000 laid side-by-side to span the width of a single human hair. In the last five years, scientists have discovered that some individual nanotubes ar...

The longest carbon nanotubes you've ever seen

Using techniques that could revolutionize manufacturing for certain materials, researchers have grown carbon nanotubes that are the longest in the world. While still slightly less than 2 centimeters long, each nanotube is 900,000 times longer than its diameter. The fibers--which have the potentia...

Pure carbon nanotubes pass first in vivo test

In the first experiments of their kind, researchers at Rice University and The University of Texas M. D. Anderson Cancer Center have determined that carbon nanotubes injected directly into the bloodstream of research lab animals cause no immediate adverse health effects and circulate for more than ...

Stable polymer nanotubes may have a biotech future

Editor : See how a nanotube is created in this cool movie Scientists at the National Institute of Standards and Technology (NIST) have created polymer nanotubes that are unusually long (about 1 centimeter) as well as stable enough to maintain their shape indefinitely. Described in a new pape...

Detection of DNA on nanotubes offers new sensing, sequencing technologies

Researchers at the University of Illinois at Urbana-Champaign who recently reported that DNA-wrapped carbon nanotubes could serve as sensors in living cells now say the tiny tubes can be used to target specific DNA sequences. Potential applications for the new sensors range from rapid detection of ...

Carbon nanotubes that detect disease-causing mutations developed by Pitt researcher

University of Pittsburgh researcher Alexander Star and colleagues at California-based company Nanomix, Inc., have developed devices made of carbon nanotubes that can find mutations in genes causing hereditary diseases, they report in the Jan. 16 issue of the journal Proceedings of the National Acad...

Modifications render carbon nanotubes nontoxic

In follow-on work to last year's groundbreaking toxicological study on water-soluble buckyballs, researchers at Rice University's Center for Biological and Environmental Nanotechnology (CBEN) find that water-soluble carbon nanotubes are significantly less toxic to begin with. Moreover, the research...

Carbon nanoparticles toxic to adult fruit flies but benign to young

...h no carbon nanoparticles, C60 and the multiwalled nanotubes climbed up the tubes with few or no difficulties. ...ies immersed in the carbon black and single-walled nanotubes could not escape their surroundings and died withi...ing, adult Drosophila coated in multiwalled carbon nanotubes carried the carbon on their bodies from one test t...

Reveal the enemy

...ucing Salmonella typhi . As reported in the journal Angewandte Chemie , their new method is based on electrochemical measurements by means of carbon nanotubes equipped with aptamers as bacteria-specific binding sites. If bacteria bind to the aptamers, the researchers detect a change in electrical voltage. ...

Progress toward artificial tissue?

...ands as a matrix; the strands completely "wrap" the scaffold-forming carbon nanotubes in the presence of an ionic liquid, networking them to form a gel. This gel...the researchers were able to produce a hydrogen peroxide sensor. The carbon nanotubes catalyze the oxidation of hydrogen peroxide, which results in a measurable ...

6 young ASU faculty earn NSF Career awards

...000 to support the research. Harnessing carbon nanotubes Hanqing Jiang's research promises to deepen fun...ctical pursuits. Jiang's work focuses on carbon nanotubes macroscopic assembly specifically carbon nanotube...the material properties and capabilities of carbon nanotubes to larger-scale materials and devices. Doing t...

'Buckyballs' to treat multiple sclerosis

...eurons in the brain alive and kicking. There is currently no cure for MS, which slowly paralyzes and then kills. Buckyballs and related carbon nanotubes have enormous potential to be used in sensors and electronic applications allowing scientists to manufacture much more smaller and faster processors. ...

Nanotube's 'tapestry' controls its growth

...oven from twisting, single-atom threads. Carbon nanotubes are hollow tubes of pure carbon that measure about...d just like a roll of wire or gift-wrapping paper, nanotubes can be rolled at an odd angle with excess hanging off the end. Though nanotubes are much-studied, their growth is poorly understoo...

Nano-tetherball biosensor precisely detects glucose

... using hollow structures called single-wall carbon nanotubes anchored to gold-coated "nanocubes." The device...oscience Center in Purdue's Discovery Park. The nanotubes have a diameter of about two nanometers, or billio...n all-purpose sensor platform." The single-wall nanotubes are especially suited for electronic sensors becau...

New 'smart' materials for the brain

...sts in Italy and Switzerland has shown that carbon nanotubes may be the ideal "smart" brain material. Their res...ly used in research and clinical applications, the nanotubes can create shortcuts between the distal and proxim...cs," explains Giugliano, who hypothesizes that the nanotubes could be used as a new building block of novel "el...

Clemson physicist Apparao Rao named Fellow of the American Physical Society

...ership. Rao was recognized for developing methods of synthesizing carbon nanotubes and for elucidating the properties of carbon nanotubes through Raman spectroscopy, a technique used in condensed-matter physics an...

Pitt researchers create non-toxic clean-up method for potentially toxic nano materials

...ics. A Pitt research team has found that carbon nanotubes deteriorate when exposed to the natural enzyme hor...nd the industrial or laboratory setting. Carbon nanotubes are one-atom thick rolls of graphite 100,000 times...detection device for asthma attacks wherein carbon nanotubes detect minute amounts of nitric oxide preceding an...

American Chemical Society's Weekly PressPac -- Dec. 3, 2008

...ake E-fibers practical for future applications, they say. The scientists describe development of cotton fibers coated with electrolytes and carbon nanotubes (CNT) thin filaments 1/50,000 the width of a single human hair. The fibers are soft, flexible, and capable of transmitting electricity when woven int...

Moving new technologies from the lab to the marketplace

...rs for diabetics. The device uses highly conductive nanomaterials -- carbon nanotubes and gold quantum dots -- to guide the electrons. Treena Livingston Arin...or producing, purifying and changing the chemical characteristics of carbon nanotubes thus allowing nanomaterials to be combined into nanostructures, manipulated...

As sticky as a gecko... but 10 times stronger!

...ticks best when it is pulled down parallel to the surface it is sticking to--this is called shear adhesion. This action arranges the tips of the curly nanotubes so they have maximum contact with the substrate, thereby maximizing the Van der Waals force. Pulling the adhesive off in a motion perpendicular to the...

American Chemical Society's Weekly PressPac

...onthly journal. Georgios K. Dimitrakakis, Emmanuel Tylianakis, and George E. Froudakis note that researchers long have sought ways of using carbon nanotubes (CNTs) to store hydrogen in fuel cell vehicles. CNTs are minute cylinders of carbon about 50,000 times thinner than the width of a human hair. Scienti...

UNC study on properties of carbon nanotubes, water could have wide-ranging implications

...iscovery about the way water behaves inside carbon nanotubes could have implications in fields ranging from the...nfined" water specifically, whether hollow carbon nanotubes take in the liquid easily or reluctantly, dependin... UNC College of Arts and Sciences, examined carbon nanotubes measuring just 1.4 nanometers in diameter (one nan...

AVS 55th International Symposium & Exhibition, Oct. 19-24

... http://www.avssymposium.org/paper.asp?abstractID=1390 . HIGH-POWER nanotubes "...The carbon nanotube field effect transistor has the potential to del...in Transport between Spin-Polarized Sources and Drains: Advantage of Carbon nanotubes on Semiconductors" will be at 5:00 p.m. on Wednesday, October 22, 2008 in R...

Save-the-date: Major nanotech, energy, and biomed meeting

... storage by exploiting electron spin along with charge. Fert's talk "Spin Transport between Spin-Polarized Sources and Drains: Advantage of Carbon nanotubes on Semiconductors" will be at 5:00 p.m. on Wednesday, October 22, 2008 in Room 206 of the Hynes Convention Center. For full details, see: http://www....

Carbon nanostructures form the future of electronics and optoelectronics

...rical and optical properties of nanoscale carbon materials including carbon nanotubes − from basic science to exciting applications. The award, accompanied...nanostructures. Avouris and Heinz's studies of the electronic properties of nanotubes and graphene aim at developing a future nanoelectronic technology with devi...

Coating improves electrical stimulation therapy used for Parkinson's, depression, chronic pain

...ack from the sensors." Depending on the way the nanotubes are fashioned, researchers were able to bolster ei...s it improved by a factor of as much as 1,600. nanotubes look like lattices rolled into a tube on a microsc...hough they are 1/50,000 the width of a human hair, nanotubes are nonetheless among the stiffest and strongest f...

American Chemical Society's Weekly PressPac -- Sept. 10, 2008

...0,000 times thinner than a human hair, that are known to have superior electrical conductivity. The scientists then deposited manganese oxide onto the nanotubes using a simple, low-cost coating technique called "electrodeposition," resulting in nano-sized clusters that resemble tiny dandelions under an electro...

New 'chemical radar' among national security innovations in ACS podcast

...al source of the toxin is readily available. The test detects minute quantities of castor bean DNA. A rugged antibacterial coating made of carbon nanotubes coated with a natural microbe-fighting substance known as lysozyme that scientists long have dreamed of using to battle pathogens. The coating can be ...

Caltech scientists create DNA tubes with programmable sizes for nanoscale manufacturing

...rs, or four by four inches for fence posts--having nanotubes of various, precisely controlled sizes provides their user with more options. In addition, nanotubes of different sizes have varying mechanical propert...d tubes with a larger diameter are more rigid. The nanotubes might eventually serve as templates for manufactur...
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