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Nanotechnology RSS Feeds

A Better Way to Make Nanotubes - (PhysOrg.com) -- A compound synthesized for the first time by Berkeley Lab scientists could help to push nanotechnology out of the lab and into faster electronic devices, more powerful sensors, and other advanced technologies. The scientists developed a hoop-shaped chain of benzene molecules that had eluded synthesis, despite numerous efforts, since it was theorized more than 70 years ago....
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Using light to move and trap DNA molecules - (PhysOrg.com) -- A major goal of nanotechnology research is to create a "lab on a chip," in which a tiny biological sample would be carried through microscopic channels for processing. This could make possible portable, fast-acting detectors for disease organisms or food-borne pathogens, rapid DNA sequencing and other tests that now take hours or days....
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The gold standard: 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. ...
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Six North American sites hold 12,900-year-old nanodiamond-rich soil - Abundant tiny particles of diamond dust exist in sediments dating to 12,900 years ago at six North American sites, adding strong evidence for Earth's impact with a rare swarm of carbon-and-water-rich comets or carbonaceous chondrites, reports a nine-member scientific team....
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Gold nanoparticles for controlled drug delivery - (PhysOrg.com) -- Using tiny gold particles and infrared light, MIT researchers have developed a drug-delivery system that allows multiple drugs to be released in a controlled fashion....
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New 'Nanowelding' Technique for Building Electronic Nanostructures - (PhysOrg.com) -- Scientists have discovered a way to link nanowires and other nanoobjects into complex nanostructures and circuits by fusing them together with tiny amounts of solder. The researchers, from Sheffield University in the UK, expect that their method could be used to fabricate nanoelectronic test structures for research or to repair interconnects or other defects in circuits....
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Cracking a Tough Nut for the Semiconductor Industry - (PhysOrg.com) -- Researchers at the National Institute of Standards and Technology have developed a method to measure the toughness -- the resistance to fracture -- of the thin insulating films that play a critical role in high-performance integrated circuits. The new technique could help improve the reliability and manufacturability of ICs and, better yet, it`s one that state-of-the-art microelectronics manufacturers can use with equipment they already own....
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Enhancing solar cells with nanoparticles - Deriving plentiful electricity from sunlight at a modest cost is a challenge with immense implications for energy, technology, and climate policy. A paper in a special energy issue of Optics Express, the Optical Society's (OSA) open-access journal, describes a relatively new approach to solar cells: lacing them with nanoscopic metal particles. As the authors describe in the article, this approach has the potential to greatly improve the ability of solar cells to harvest light efficiently....
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Measuring Nanoparticle Behavior in the Body Using MRI - (PhysOrg.com) -- One of the key steps in the development of any drug or imaging agent intended for human use is measurement of the adsorption, metabolism, and excretion of the drug. Quantifying this collection of pharmacological properties, known as ADME, is a challenging and time-consuming process that is even more difficult when the drug or imaging agent includes a nanoparticle as one of its components. But by taking advantage of the magnetic properties of one kind of nanoparticle, a team of investigators at Washington University in St. Louis has demonstrated that they can measure ADME quickly using magnetic resonance imaging (MRI)....
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'Barcode Chip' Enables Cheap, Fast Blood Tests - (PhysOrg.com) -- A new barcode chip developed by a multi-institutional team of investigators promises to revolutionize diagnostic medical testing. In less than 10 minutes and using just a pinprick`s worth of blood, the chip can measure the concentrations of dozens of proteins, including those that herald the presence of diseases such as cancer and heart disease....
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Researchers Fabricate Complex SWNT Architectures Using Newly Developed Assembly Process - (PhysOrg.com) -- Given the sheer number of potential applications for carbon nanotubes, experts in the field of nanotechnology are developing effective ways to mass produce intricate nanoscale structures for electronics, sensing, energy and biomedical applications in a timely, cost-effective manner with a high level of accuracy....
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Study on cytotoxicity of carbon nanotubes - Owing to the novel properties of carbon nanotubes (CBNs), a series of problems associated with in vitro toxicity assessments of carbon nanotubes (CNTs) have appeared in many literatures. In order to properly evaluate the potential risk to human health, the cell toxicity assay of CBNs can not be conducted by traditional methods employed in common toxicology....
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New 'smart' materials for the brain - Research done by scientists in Italy and Switzerland has shown that carbon nanotubes may be the ideal "smart" brain material. Their results, published December 21 in the advance online edition of the journal Nature Nanotechnology, are a promising step forward in the search to find ways to "bypass" faulty brain wiring....
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Scientists Develop World's Fastest Graphene Transistor - (PhysOrg.com) -- IBM Researchers today announced that they demonstrated the operation of graphene field-effect transistors at GHz frequencies, and achieved the highest frequencies reported so far using this novel non-silicon electronic material. ...
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Computing in a molecule - (PhysOrg.com) -- Over the last 60 years, ever-smaller generations of transistors have driven exponential growth in computing power. Could molecules, each turned into miniscule computer components, trigger even greater growth in computing over the next 60?...
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Experts argue nano food-additives require new oversight - Nanotechnology policy experts are urging that food additives that contain nanoscale materials be subject to new safety testing to ensure that their use does not pose unintended risks....
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Bright White Light Coaxed from Unexpected Source - (PhysOrg.com) -- Duke University and United States Army scientists have found that a cheap and nontoxic sunburn and diaper rash preventative can be made to produce brilliant light best suited to the human eye....
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Scientists print dense lattice of transparent nanotube transistors on flexible base - It's a clear, colorless disk about 5 inches in diameter that bends and twists like a playing card, with a lattice of more than 20,000 nanotube transistors capable of high-performance electronics printed upon it using a potentially inexpensive low-temperature process....
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Pitt researchers create non-toxic clean-up method for potentially toxic nano materials - University of Pittsburgh researchers have developed the first natural, nontoxic method for biodegrading carbon nanotubes, a finding that could help diminish the environmental and health concerns that mar the otherwise bright prospects of the super-strong materials commonly used in products, from electronics to plastics....
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Measuring conductance of carbon nanotubes, one by one - (PhysOrg.com) -- A single batch of carbon nanotubes -- molecular carbon cylinders that may one day revolutionize electronics engineering -- often includes more than 100 types of tubes, each with different optical and electrical properties. Individual electrical measurements of the molecules typically require such slow and expensive methods as electron-beam lithography....
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Tiny delivery system with a big impact on cancer cells - Researchers in Pennsylvania are reporting for the first time that nanoparticles 1/5,000 the diameter of a human hair encapsulating an experimental anticancer agent, kill human melanoma and drug-resistant breast cancer cells growing in laboratory cultures. The discovery could lead to the development of a new generation of anti-cancer drugs that are safer and more effective than conventional chemotherapy agents, the scientists suggest. The research is scheduled for the Dec. 10 issue of ACS' Nano Letters....
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Nature, nanotechnology fuse in electric yarn that detects blood - (PhysOrg.com) -- A carbon nanotube-coated "smart yarn" that conducts electricity could be woven into soft fabrics that detect blood and monitor health, engineers at the University of Michigan have demonstrated....
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Method sorts out double-walled carbon nanotube problem - It's hard to study something with any rigor if the subject can't be produced uniformly and efficiently. Researchers who study double-walled carbon nanotubes -- nanomaterials with promising technological applications -- find themselves in just this predicament....
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Nanotubes sniff out cancer agents in living cells - MIT engineers have developed carbon nanotubes into sensors for cancer drugs and other DNA-damaging agents inside living cells....
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Carbon Nanofibers Cut Flammability of Upholstered Furniture - (PhysOrg.com) -- Carbon, the active ingredient in charcoal, is normally not considered a fire retardant, but researchers at the National Institute of Standards and Technology have determined that adding a small amount of carbon nanofibers to the polyurethane foams used in some upholstered furniture can reduce flammability by about 35 percent when compared to foam infused with conventional fire retardants....
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Panel blasts federal nanotech risk research strategy - A National Research Council (NRC) committee today issued a highly critical report describing serious shortfalls in the Bush administration's strategy to better understand the environment, health and safety (EHS) risks of nanotechnology and to effectively manage those potential risks....
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Getting to the Heart of Stents - (PhysOrg.com) -- Using the Canadian Light Source, a team of researchers from Quebec`s Laval University and Australia`s La Trobe University has discovered how to improve the nanometers-thick layer of polymer used to coat cardiac stents. A stent is a small, springy tube made from stainless steel that is used to open arteries to the heart, that become blocked from atherosclerosis or other forms of heart disease. The findings, published at the end of August in the journal Langmuir, could lead to fewer complications when treating blocked arteries....
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People in the US and the UK show strong similarities in their attitudes toward nanotechnologies - The results of a new U.S. -U.K. study published in this week's journal Nature Nanotechnology show that ordinary people in both countries hold very positive views of nanotechnologies and what the future of these technologies might bring. Participants in both countries indicated a significantly higher comfort level with energy applications of nanotechnologies than with applications used in health treatments....
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Research shows there could be no end in sight for Moore's Law - The fast pace of growing computing power could be sustained for many years to come thanks to new research from the UK's National Physical Laboratory (NPL) that is applying advanced techniques to magnetic semiconductors....
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New hybrid nanostructures detect nanoscale magnetism - A key challenge of nanotechnology research is investigating how different materials behave at lengths of merely one-billionth of a meter. When shrunk to such tiny sizes, many everyday materials exhibit interesting and potentially beneficial new properties....
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