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Keyword: nanotechnology

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  • New type of microengine using internal combustion of hydrogen and oxygen

    03/13/2014 11:23:48 AM PDT · by Kevmo · 5 replies
    MESA+ Institute for Nanotechnology, University of Twente, ^ | March 2014 | Vitaly B. Svetovoy*1,2, Remco G. P. Sanders1, Kechun Ma1 & Miko C. Elwenspoek1,3
    New type of microengine using internal combustion of hydrogen and oxygen Vitaly B. Svetovoy*1,2, Remco G. P. Sanders1, Kechun Ma1 & Miko C. Elwenspoek1,3 MESA+ Institute for Nanotechnology, University of Twente, PO 217, 7500 AE Enschede, The Netherlands (v.svetovoy@utwente.nl) 2Institute of Physics and Technology, Yaroslavl Branch, Russian Academy of Sciences, 150007,Yaroslavl, Russia 3FRIAS, University of Freiburg, 79104 Freiburg, Germany Microsystems become part of everyday life but their application is restricted by lack of strong and fast motors (actuators) converting energy into motion. For example, widespread internal combustion engines cannot be scaled down because combustion reactions are quenched in a small...
  • Intricate 3D Printed Materials Lighter Than Water And As Strong as Steel

    02/11/2014 5:31:21 PM PST · by 2ndDivisionVet · 20 replies
    SingularityHUB ^ | February 11, 2014 | Jason Dorrier
    Using precision lasers, a Nanoscribe 3D printer can print models of the Empire State building in a space the width of a human hair. Watching the machine build through the “lens” of an electron microscope is otherworldly—but the printer’s potential runs beyond microscale model making. Researchers at the Karlsruhe Institute of Technology, led by Jens Bauer, believe such 3D printers may help craft a new generation of materials lighter than water and strong as steel. Today, the sturdiest materials tend to be the densest (like metals), and the least dense materials tend to be the weakest (like foams). Ideally, materials...
  • The Reluctant Visionary

    11/27/2013 1:35:43 PM PST · by Da Bilge Troll · 9 replies
    Foundation for Economic Education ^ | NOVEMBER 27, 2013 | PHIL BOWERMASTER
    "Nanotechnology-driven manufacturing will change our world in fundamental ways—but we shouldn’t get too worked up about it." In 1959, Richard Feynman delivered a lecture with the provocative title “There’s Plenty of Room at the Bottom." Speaking at a meeting of the American Physical Society at Caltech, the Nobel-laureate-to-be speculated about the possibility of manipulating matter at the atomic level via exquisitely small machines. Would it be possible, Feynman asked, for such machinery to configure atoms themselves, producing atomically precise outputs? Might we one day have billions of submicroscopic factories working in parallel to produce anything and everything we need? It...
  • Container's material properties affect the viscosity of water at the nanoscale

    09/22/2013 12:00:40 AM PDT · by LibWhacker · 9 replies
    Phys.org ^ | 9/19/13
    Container's material properties affect the viscosity of water at the nanoscale Sep 19, 2013 Enlarge Georgia Tech associate professor Elisa Riedo poses with a glass water bottle and a plastic water bottle. While container materials don't significantly affect the rate at which water pours from bottles of this size, a new study shows that the properties of containers at the nanoscale dramatically affect the viscosity of water. Credit: Rob Felt Water pours into a cup at about the same rate regardless of whether the water bottle is made of glass or plastic. But at nanometer-size scales for water and potentially...
  • Easy route to stable silver nanoparticles

    09/06/2013 3:21:52 PM PDT · by neverdem · 2 replies
    Nature News ^ | 04 September 2013 | Mark Peplow
    Cheap synthesis offers edge over gold particles for biomedicine and solar cells. In the realm of nanoparticles, gold reigns supreme. Stable and easy to handle, gold nanoparticles have been used to image cells, deliver drugs and detect disease biomarkers. Silver, by contrast, has suffered from a tarnished reputation, because it is more easily oxidized than gold. It is cheaper, but its nanoparticles degrade far too easily for most uses. Two teams of chemists are now burnishing silver’s status. They have independently developed methods to make robust silver nanoparticles on a large scale — and have worked out what makes them...
  • Silent labs for futuristic nanotechnology

    08/29/2013 9:13:16 PM PDT · by neverdem · 12 replies
    Chemistry World ^ | 28 August 2013 | Rowan Frame
    Scientists can now experiment at the atomic scale with unprecedented accuracy in new ‘silent’ laboratories in Switzerland. These labs are shielded against all possible forms of background disturbances – external vibrations, acoustic noise, electromagnetic fields and temperature fluctuations. It is hoped that the labs, devised by Emanuel Lörtscher and his team at IBM Zurich, will accommodate the demands of nanotechnology for the next 20–30 years. The labs were designed to screen all sources of background noise relevant to nanotechnologyWhen probing or building structures at the nanoscale, experimental readings are so tiny that they are easily drowned out by any...
  • This 1,600-Year-Old Goblet Shows that the Romans Were Nanotechnology Pioneers

    08/25/2013 2:39:06 PM PDT · by SunkenCiv · 30 replies
    Smithsonian magazine ^ | September 2013 | Zeeya Merali
    The Romans may have first come across the colorful potential of nanoparticles by accident but they seem to have perfected it... The glass chalice, known as the Lycurgus Cup because it bears a scene involving King Lycurgus of Thrace, appears jade green when lit from the front but blood-red when lit from behind -- a property that puzzled scientists for decades after the museum acquired the cup in the 1950s. The mystery wasn’t solved until 1990, when researchers in England scrutinized broken fragments under a microscope and discovered that the Roman artisans were nanotechnology pioneers: They’d impregnated the glass with...
  • Sound solution to nanoparticle handling problems

    08/04/2013 2:40:03 PM PDT · by neverdem · 9 replies
    Chemistry World ^ | 2 August 2013 | Hayley Birch
    Nickel oxide nanoparticles glued together with ultrasound lost none of their catalytic activity © Wiley-VCHResearchers are using ultrasound to bond nanoparticles – essentially sticking together particles too small to be seen with sounds too high-pitched to be heard. The technique apparently preserves the special properties of nanomaterials, while producing micro-scale particles that are easier to handle.Jake Barralet at McGill University in Montreal, Canada, and colleagues show they can take nanoparticles, coat them in phosphate and then weld them together in an ultrasonic bath to form microparticles around 200µm in size.A chance discovery, the team initially assumed the phenomenon was...
  • Nano Masterpieces

    07/25/2013 1:10:30 PM PDT · by neverdem · 3 replies
    ScienceNOW ^ | July 23, 2013 | Robert F. Service
    C. Mirkin, Northwestern UniversityLight work. Using a digital micromirror to split beams of light and direct them through apertures in polymer pyramids, Northwestern University researchers drew a variety of molecular architectures and used those to make up the "land" in a map of the world. Imagine trying to draw a maze on something the width of a human hair. Engineers do it all the time when they carve circuits onto semiconductors for our cell phones, tablets, and desktops. That doesn't mean it's easy: The process can require fabrication facilities costing billions of dollars. Now, modifications to an old technique could...
  • Move over 3D printing, self-assemblng 4D-printed materials are on the way

    06/05/2013 3:22:30 PM PDT · by SeekAndFind · 17 replies
    Gizmag ^ | 06/03/2013 | Donna Taylor
    Molecular self-assembly, whereby molecules position themselves into defined arrangements, is commonplace in biological systems and nanotechnology. But researchers at MIT are working on so called "4D printing" technology that aims to bring the process up to the macro scale, enabling 3D-printed materials to be programmed to self-assemble into predefined shapes and structures. Just imagine buying some flat-pack furniture, bringing it home and enjoying a coffee whilst you watch it assemble itself. This month, Skylar Tibbits, director of the MIT Self-Assembly lab, was named as one of the six Architectural League winners for collaborative research into programmable materials. The 4D printing...
  • DNA-guided assembly yields novel ribbon-like nanostructures

    05/22/2013 3:00:05 PM PDT · by neverdem · 8 replies
    Biology News Net ^ | May 16, 2013 | NA
    DNA-tethered nanorods link up like rungs on a ribbonlike ladder—a new mechanism for linear self-assembly that may be unique to the nanoscale. Scientists at the U.S. Department of Energy's Brookhaven National Laboratory have discovered that DNA "linker" strands coax nano-sized rods to line up in way unlike any other spontaneous arrangement of rod-shaped objects. The arrangement-with the rods forming "rungs" on ladder-like ribbons linked by multiple DNA strands-results from the collective interactions of the flexible DNA tethers and may be unique to the nanoscale. The research, described in a paper published online in ACS Nano, a journal of the American...
  • Cheap Nanotech Filter Clears Hazardous Microbes and Chemicals from Drinking Water

    05/07/2013 6:07:43 PM PDT · by neverdem · 44 replies
    Scientific American ^ | May 7, 2013 | Luciana Gravotta
    A $16 device could provide a family of five with clean water for an entire year About 780 million people—a tenth of the world’s population—do not have access to clean drinking water. Water laced with contaminants such as bacteria, viruses, lead and arsenic claims millions of lives each year. But an inexpensive device that effectively clears such contaminants from water may help solve this problem. Thalappil Pradeep and his colleagues at the Indian Institute of Technology Madras developed a $16 nanoparticle water filtration system that promises potable water for even the poorest communities in India and, in the future, for...
  • MA lawmaker 'took pictures of his genitals and put them on a female coworker's computer'

    03/22/2013 12:12:09 PM PDT · by raccoonradio · 79 replies
    Daily Mail ^ | 3/22/13 | Daily Mail Reporter
    A state representative in Massachussetts is being investigated after allegedly sending pictures of his genitals to a government computer. The investigation is ongoing and the committee has not formally reprimanded the individual in charge, but it is being widely reported that Democratic State Representative John Fresolo is the one behind the scandal.
  • Striped nanoparticle controversy blows up

    12/08/2012 11:14:18 PM PST · by neverdem · 9 replies
    Chemistry World ^ | 7 December 2012 | Simon Hadlington
    Some scientists question the existence of self-assembling stripes on nanoparticles © NPGA prickly controversy has erupted in the rarefied world of nanoscience revolving around the strength of the evidence that molecules can assemble themselves into discrete stripes around gold nanoparticles. The issue highlights the difficulty of interpreting images of nanoscale objects.For many years researchers have been decorating gold nanoparticles with thiolated ligands to imbue the nanoparticles with a range of properties. In 2004, a group led by Francesco Stellacci, then at the Massachusetts Institute of Technology in the US, published a paper in Nature Materials demonstrating that if two different...
  • Scientists eye nanotechnologies to boost crop yields

    11/23/2012 11:06:01 AM PST · by Olog-hai · 5 replies
    EurActiv ^ | 23 November 2012 | Timothy Spence
    Nanotechnologies that deliver fertilizers to plants offer promising ways of improving farm productivity while reducing the risk of water contamination. But the scientists behind a new Swiss-funded study caution that while the technology is still evolving, potential risks must be considered. The European Union’s Horizon 2020 research program proposes heavy investment in developing materials and machines that are built from an atomic or molecular scale, with the European Commission proposing some €6 billion ($7.7 billion) in financing for nano and other advanced technologies. A UN Food and Agriculture Organization conference held earlier this year in Rome identified nanotechnology as potentially...
  • Breakthrough nanoparticle halts multiple sclerosis

    11/21/2012 11:41:34 PM PST · by LibWhacker · 21 replies
    EurekAlert! ^ | 11/18/12 | Marla Paul
    New nanotechnology can be used for Type 1 diabetes, food allergies and asthma New nanoparticle tricks and resets immune system in mice with MSFirst MS approach that doesn't suppress immune systemClinical trial for MS patients shows why nanoparticle is best optionNanoparticle now being tested in Type 1 diabetes and asthma CHICAGO --- In a breakthrough for nanotechnology and multiple sclerosis, a biodegradable nanoparticle turns out to be the perfect vehicle to stealthily deliver an antigen that tricks the immune system into stopping its attack on myelin and halt a model of relapsing remitting multiple sclerosis (MS) in mice, according...
  • Wax-Filled Nanotubes Flex Their Muscles

    11/16/2012 11:27:17 PM PST · by neverdem · 6 replies
    ScienceNOW ^ | 15 November 2012 | Sarah C. P. Williams
    Enlarge Image Nanopower. Yarn made of intertwined carbon nanofibers and wax can expand and contract like muscle. Credit: Images Courtesy of Science/AAAS Here's a twist: Scientists have designed a flexible, yarnlike artificial muscle that can also pack a punch. It can contract in 25 milliseconds—a fraction of the time it takes to blink an eye—and can generate power 85 times as great as a similarly sized human muscle. The new muscles are made of carbon nanotubes filled with paraffin wax that can twist or stretch in response to heat or electricity. When the temperature rises, the wax melts and...
  • Molecular muscle machines bulk up

    10/26/2012 9:17:48 PM PDT · by neverdem · 4 replies
    Chemistry World ^ | 26 October 2012 | Andy Extance
    French researchers have made the longest molecular machines that can be shrunk on demand in a collective motion that emulate muscle fibres.1Nicolas Giuseppone from the University of Strasbourg and his teammates linked together strings of around 3000 macromolecular daisy-chain rotaxane monomers that contract under basic conditions. The resulting polymer went from 15.8 µm to 9.4 µm, movement in the range of that produced by sarcomere proteins, the basic building blocks of muscle. That amplifies a single daisy-chain rotaxane’s contraction by nearly four orders of magnitude, Giuseppone tells Chemistry World. ‘This is a result long expected by the community, but it...
  • Nanotechnology: Armed resistance

    08/29/2012 10:04:36 PM PDT · by neverdem · 12 replies
    Nature ^ | 29 August 2012 | Leigh Phillips
    Nature assesses the aftermath of a series of nanotechnology-lab bombings in Mexico — and asks how the country became a target of eco-anarchists. The shoe-box-sized package was addressed to Armando Herrera Corral. It stated that he was the recipient of an award and it was covered in official-looking stamps. Herrera, a computer scientist at the Monterrey Institute of Technology and Higher Education in Mexico City, shook the box a number of times, and something solid jiggled inside. What could it be? He was excited and a little nervous — so much so, that he walked down the hall to the...
  • Researchers explore Li-air battery reversibility on the nanoscale

    08/08/2012 8:23:06 PM PDT · by Kevmo · 5 replies
    (Phys.org) ^ | August 8, 2012 | by Lisa Zyga
    http://phys.org/news/2012-08-explore-li-air-battery-reversibility-nanoscale.html Researchers explore Li-air battery reversibility on the nanoscale August 8, 2012 by Lisa Zyga (Phys.org) – Researchers explore Li-air battery reversibility on the nanoscale August 8, 2012 by Lisa Zyga (Phys.org) ----------------------------------------As their name suggests, Li-air batteries use air to operate, pulling out oxygen molecules to use in a porous, carbon-based cathode, while using lithium in the anode. Because using air means the battery doesn’t have to store a heavy charge source at the cathode, the batteries can provide an extremely high energy density, holding nearly as much energy in a given volume as gasoline, and 5-10 times...
  • 7 Animals That Harnessed Nanotechnology Long Before Humans

    07/14/2012 6:41:45 PM PDT · by Sir Napsalot · 11 replies
    Discovery Magazine ^ | April 3, 2012 | Mara Grunbaum
    Galleries - (1) INVISIBLE EYES The animal kingdom boasts many an impressive form, from arching giraffe necks to spoon-shaped bird beaks to gigantic beetle claws. But evolution has worked on much smaller scales too, producing finely honed nanostructures--parts less than a millionth of a meter across, or smaller than 1/20th of the width of a human hair--that help animals climb, slither, camouflage, flirt, and thrive. ......
  • A Shotgun for Blood Clots

    07/06/2012 7:27:58 PM PDT · by LibWhacker · 18 replies
    Science Magazine ^ | 7/5/12 | Krystnell A. Storr
    Think of it as Liquid-Plumr for the circulatory system. Researchers have designed a clump of tiny particles that rides the current of the bloodstream, seeks out life-threatening blood clots, and obliterates them. The approach works in mice and could soon move on to human trials. Blood clots are bad news for the brain, heart, and other organs. These masses of blood cells can grow big enough to choke off veins and arteries, preventing oxygen from flowing to critical organs. One of the chief obstacles to dealing with blood clots is finding where they have lodged in the body. Even if...
  • Obama mixes high-tech, political broadsides in speech (at chip lab created under Repub )

    05/08/2012 12:32:12 PM PDT · by NYer · 5 replies
    Times Union ^ | May 8, 2012 | Paul Grondahl, Larry Rulison and Cathleen Crowley
    President Barack Obama, accompanied by New York Gov. Andrew Cuomo, center, holds a silicon wafer, as they tour the College of Nanoscale Science and Engineering at State University of New York at Albany's Nano-Tech complex, Tuesday, May 8, 2012, in Albany, N.Y., with Chris Borst, assistant V.P. for Engineering and Integration. ALBANY — Using the University at Albany's nanotechnology center as a backdrop, President Barack Obama delivered a speech about the U.S. economy that touted a combination of private and public funds that go into the high-tech school.He also fired a broadside at Republicans in Congress who he blamed for...
  • Remote-controlled genes trigger insulin production

    05/06/2012 1:56:24 PM PDT · by neverdem · 6 replies
    Nature News ^ | 03 May 2012 | Helen Shen
    Nanoparticles heated by radio waves switch on genes in mice Researchers have remotely activated genes inside living animals, a proof of concept that could one day lead to medical procedures in which patients’ genes are triggered on demand. The work, in which a team used radio waves to switch on engineered insulin-producing genes in mice, is published today in Science1. Jeffrey Friedman, a molecular geneticist at the Rockefeller University in New York and lead author of the study, says that in the short term, the results will lead to better tools to allow scientists to manipulate cells non-invasively. But with...
  • DNA nanorobots seek and destroy disease

    02/19/2012 10:17:56 AM PST · by neverdem · 12 replies · 1+ views
    Chemistry World ^ | 17 February 2012 | Jon Cartwright
    Researchers in the US have created a DNA-based nanorobot that can work its way through cell cultures, delivering cargo only at specific targets. The development could pave the way for programmable therapeutics, in which nanorobots would provide medical treatment only to certain types of cell or tissue.  The DNA barrel only opens to release its cargo at specific cells © AAAS The field of nanomachines has taken off in recent years, mostly thanks to so-called DNA origami. In this technique, DNA strands can be folded controllably into a structure, onto which different molecules can be attached. Researchers have already shown...
  • New Storage Device Is Very Small, at 12 Atoms

    01/15/2012 10:26:09 PM PST · by neverdem · 17 replies
    NY Times ^ | anuary 12, 2012 | JOHN MARKOFF
    SAN JOSE, Calif. — Researchers at I.B.M. have stored and retrieved digital 1s and 0s from an array of just 12 atoms, pushing the boundaries of the magnetic storage of information to the edge of what is possible. The findings, being reported Thursday in the journal Science, could help lead to a new class of nanomaterials for a generation of memory chips and disk drives that will not only have greater capabilities than the current silicon-based computers but will consume significantly less power. And they may offer a new direction for research in quantum computing. “Magnetic materials are extremely useful...
  • Using Light to Flip a Tiny Mechanical Switch by on

    10/26/2011 12:03:16 PM PDT · by neverdem · 8 replies
    ScienceNOW ^ | 23 October 2011 | Adrian Cho
    Enlarge Image Flipping brilliant! Using only light, scientists can switch this little bridge of silicon between its "bowed up" configuration (top) and its "bowed down" configuration. Credit: M. Bagheri et al., Nature Nanotechnology, Advance Online Publication (2011) The feeble force of light alone can flip a nanometer-sized mechanical switch one way or the other, a team of electrical engineers reports. The little gizmo holds its position without power and at room temperature, so it might someday make a memory bit for an optical computer. Other researchers say it also introduces a promising new twist into the hot field of...
  • Manmade molecular machine goes to work

    08/22/2011 11:50:22 PM PDT · by neverdem · 3 replies
    Chemistry World ^ | 22 August 2011 | Jon Cartwright
    Researchers in the UK and Belgium have measured the work performed by a single manmade molecule. The result demonstrates that manmade molecules can generate similar forces to natural molecular machines, and could help chemists to design artificial molecular machines for meaningful tasks. Many biological molecules can perform useful work. The protein motors kinesin and dynein, for example, transport cargo around cells using the chemical energy stored in ATP, the chemical fuel of biological systems. Scientists have created their own molecular machines that perform useful work, such as moving liquid droplets uphill or rotating microscale objects. But these synthetic machines have all...
  • Online with the blink of an eye and other marvels in our future

    06/04/2011 9:42:48 PM PDT · by LibWhacker · 8 replies · 2+ views
    LA Times ^ | 6/3/11 | Amina Khan
    The theoretical physicist and author of 'Physics of the Future' talks about how nanotechnology will change our lives.Will the future bring us the teleportation devices of "Star Trek" or the sinister machines of "The Matrix"? Theoretical physicist Michio Kaku of the City College of New York says that many of the things that were once the domain of science fiction — cars that navigate rush-hour traffic on their own, wallpaper that can switch colors when you remodel, an elevator that takes you into outer space — are already here, or well on their way. His book "Physics of the Future,"...
  • Mighty micelles that make themselves

    04/07/2011 7:32:39 AM PDT · by neverdem · 3 replies
    Chemistry World ^ | 04 April 2011 | Carol Stanier
    Scientists in the US and Singapore have made self assembling micelles of cationic polymers that kill bacteria but are biodegradable - raising further hope of a nanotechnology solution to the problem of antibiotic resistance.Conventional antibiotics typically kill by penetrating the cell wall and disrupting vital cellular processes inside. But bacterial resistance to such antibiotics is growing because bacteria that survive treatment go on to proliferate, thereby spreading their genetic advantage.Some cationic peptides can kill bacteria by disrupting the cell wall of the bacteria instead, and resistance in this case is less likely to arise. But these peptides are often toxic to the host and...
  • Better Molecular Pens

    01/31/2011 10:33:39 PM PST · by neverdem · 9 replies
    ScienceNOW ^ | 28 January 2011 | Robert F. Service
    Enlarge Image All together now. Arrays of silicon tips with a springlike polymer support can pattern materials cheaply over large areas. Credit: C. Mirkin/Northwestern University Someday, nanotechnologists fancy, they'll be able to build materials atom by atom from the bottom up, LEGO-style. Right now they're still working on the two-dimensional equivalent: writing ultrafine lines and dots of selected molecules on ultrasmooth surfaces. Unfortunately, all the molecular "pens" developed so far have been either too blunt-tipped or too costly for broad use. Now a new technique might enable nanotechnologists to quickly and cheaply write molecular features across a large area....
  • Cinnamon can replace harmful chemicals used to create nanoparticles

    11/29/2010 11:48:42 AM PST · by decimon · 11 replies
    University of Missouri-Columbia ^ | November 29, 2010 | Unknown
    MU scientists make strides in green nanotechnologyCOLUMBIA, Mo. ¬¬¬–Gold nanoparticles, tiny pieces of gold so small that they can't be seen by the naked eye, are used in electronics, healthcare products and as pharmaceuticals to fight cancer. Despite their positive uses, the process to make the nanoparticles requires dangerous and extremely toxic chemicals. While the nanotechnology industry is expected to produce large quantities of nanoparticles in the near future, researchers have been worried about the environmental impact of the global nanotechnological revolution. Now, a study by a University of Missouri research team, led by MU scientist Kattesh Katti, curators' professor...
  • A Cheap, Fast Way to Write Nanoscale Patterns

    08/06/2010 9:33:02 PM PDT · by neverdem · 10 replies
    ScienceNOW ^ | August 6, 2010 | Robert F. Service
    Enlarge Image Hybrid. A new nanopatterning technique combines the advantages of near-field microscopy with photolithography. Credit: Mirkin Group/International Institute for Nanotechnology, Northwestern University Today's microchips, communications gear, and medical diagnostics are typically made by writing nanoscale patterns over large areas of silicon wafers and other high-tech materials. The process is either extremely expensive or painfully slow, however. Now scientists have come up with a hybrid approach that could offer researchers a way to craft prototype nanoscale devices quickly and cheaply, speeding up the already blistering pace of developments in the field. The standard computer chip–patterning technique, called photolithography, works...
  • Israel's secret new weapon? (Nanotech stealth)

    07/15/2010 7:02:56 PM PDT · by kress · 11 replies
    Ynet News ^ | 07.13.10 | Ofer Petersburg
    Israeli company uses nanotechnology to develop paint that makes planes disappear off radar Imagine for a moment what the battlefield will look like in the future. Unmanned planes flying through the air; robots fighting on the ground; smart missiles hunting down targets. Now imagine that none of this can be detected on radar screens. It may sound fictional, but it's happening. An Israeli company called Nanoflight is currently developing a special paint that makes drones, missiles, or war craft simply disappear. Or, to be more precise, they become very difficult to detect. The critical stage in developing the paint, which...
  • Rice physicists kill cancer with 'nanobubbles'

    02/05/2010 6:42:46 AM PST · by decimon · 9 replies · 365+ views
    Rice University ^ | Feb 4, 2010 | Unknown
    Team finds method of IDing, destroying individual diseased cellsUsing lasers and nanoparticles, scientists at Rice University have discovered a new technique for singling out individual diseased cells and destroying them with tiny explosions. The scientists used lasers to make "nanobubbles" by zapping gold nanoparticles inside cells. In tests on cancer cells, they found they could tune the lasers to create either small, bright bubbles that were visible but harmless or large bubbles that burst the cells. "Single-cell targeting is one of the most touted advantages of nanomedicine, and our approach delivers on that promise with a localized effect inside an...
  • Spray-on liquid glass is about to revolutionize almost everything

    02/02/2010 7:40:24 PM PST · by LibWhacker · 98 replies · 2,697+ views
    PhysOrg ^ | 2/2/10 | Lin Edwards
    (PhysOrg.com) -- Spray-on liquid glass is transparent, non-toxic, and can protect virtually any surface against almost any damage from hazards such as water, UV radiation, dirt, heat, and bacterial infections. The coating is also flexible and breathable, which makes it suitable for use on an enormous array of products. The liquid glass spray (technically termed “SiO2 ultra-thin layering”) consists of almost pure silicon dioxide (silica, the normal compound in glass) extracted from quartz sand. Water or ethanol is added, depending on the type of surface to be coated. There are no additives, and the nano-scale glass coating bonds to the...
  • World's Smallest Hot Rod Made Using Nanotechnology

    01/19/2010 4:57:45 PM PST · by JoeProBono · 11 replies · 1,105+ views
    livescience ^ | 19 January 2010 | Adam Hadhazy
    Researchers have built a new super-small "nanodragster" that improves on prior nanocar designs and could speed up efforts to craft molecular machines. "We made a new version of a nanocar that looks like a dragster," said James Tour, a chemist at Rice University who was involved in the research. "It has smaller front wheels on a shorter axle and bigger back wheels on a longer axle." The miniscule vehicle is about 50,000 times thinner than a human hair and is pushed along by heat or an electric field. Spherical molecules called buckyballs made of 60 carbon atoms each serve as...
  • The Laws of Science: Jim Tour is a leading scientist at Rice in nanotechnology

    01/04/2010 9:24:06 PM PST · by achilles2000 · 9 replies · 550+ views
    Houston Chronicle ^ | January 4, 2010 | Eric Berger
    As a teen pumping gas on a highway north of New York City, Jim Tour dreamed of becoming a state trooper. It beat filling tanks. The notion of Tour as a highway cop is almost laughably discordant with present-day reality. Three decades later, the trim, intense, 50-year-old Tour has established himself as one of the leading, if not premier, scientists at Rice University. And he's learned to dream big. Four years after Nobel laureate Rick Smalley's untimely death, it is the prolific Tour who as much as anyone has carried on Smalley's groundbreaking legacy in the science of nanotechnology. Confirmation...
  • Nano-labels allow stem cell imaging

    11/26/2009 9:24:56 PM PST · by neverdem · 286+ views
    Highlights in Chemical Biology ^ | 23 November 2009 | Lois Alexander
    Iron-laden nanoparticles make non-toxic stem cell labels for magnetic resonance imaging. Imaging agents are used to enhance the resolution in magnetic resonance imaging (MRI), which allows internal structure of the body to be visualised. Xiaoyuan Chen at the National Institute of Health, Bethesda, has modified iron-oxide nanoparticles to make non-toxic and more efficient imaging agents.  The iron nanoparticles can enter cells without killing them Iron oxide has been used for cell labelling before but transfection agents are needed to aid uptake into cells. This can make them toxic and result in cell death, particularly in sensitive cell lines such as stem...
  • Insect Wing Photocopied for Good

    11/16/2009 9:05:06 AM PST · by GodGunsGuts · 39 replies · 1,922+ views
    CEH ^ | November 15, 2009
    Nov 15, 2009 — Biomimetics is the new science of imitating nature – but why not save a step, and just copy the design directly?  That’s what Aussie and British researchers did.  They wanted a self-cleaning surface that could repel moisture and dust, so they made a template of an insect wing.  And why not?  “Insects are incredible nanotechnologists,” reported Science Daily.  Their wings are self-cleaning, frictionless and super-water-repellant. Insect wings have these properties due to their properties at the scale of billionths of a meter.  “For instance, some wings are superhydrophobic, due to a clever combination of natural chemistry...
  • Experts Criticize Nanoparticle Study

    11/11/2009 11:59:05 PM PST · by neverdem · 1 replies · 411+ views
    ScienceNOW Daily News ^ | 6 November 2009 | Robert F. Service
    Enlarge ImageStoking Fears. A new study has raised fresh concerns about nanoparticles, but they may be unfounded. Credit: Nandiyanto/Wikimedia The headlines are laced with fear. "Nanoparticles 'can damage DNA.'" "Nanoparticle Safety Looking More Complicated." "Nanoparticles Indirect Threat to DNA." All seem to suggest that a new study, released yesterday, has found that nanoscale materials, used in everything from medical imaging to cancer treatment, can damage genetic material in our bodies, feeding public fears. But this particular study has little relevance to human exposure risks, experts say, and it is deeply flawed in other ways. "I think it's a meaningless...
  • Russia's Ancient Nanostructures

    10/19/2009 8:21:33 PM PDT · by 2ndDivisionVet · 21 replies · 2,063+ views
    The Epoch Times ^ | October 15, 2009 | Leonardo Vintińi
    An Oopart (Out Of Place ARTifact) is a term applied to dozens of prehistoric objects found in various places around the world that, given their level of technology, are completely at odds with their determined age based on physical, chemical, and/or geological evidence. Ooparts often are frustrating to conventional scientists and a delight to adventurous investigators and individuals interested in alternative scientific theories. In 1991, the appearance of extremely tiny, coil-shaped artifacts found near the banks of Russia’s Kozhim, Narada, and Balbanyu rivers brought about a debate that has continued to this day. These mysterious and minuscule structures suggest that...
  • Instant insight: Self-healing at the nanoscale

    10/08/2009 11:56:51 PM PDT · by neverdem · 2 replies · 410+ views
    Chemical Technology ^ | 06 October 2009 | NA
    Vincenzo Amendola and Moreno Meneghetti, at the University of Padova, Italy, take inspiration from nature to design materials that can repair themselves.Nature uses self-healing in all living systems to repair damage caused by environmental interactions. A simple case is repairing a skin wound - without this mechanism, we could not live. DNA repair, which must occur routinely in every living organism, is another example. But at what level do repairing mechanisms occur? Looking at the components of a living system, we find cells, which typically have micrometre dimensions. But we have to zoom in further, namely to the nanoscale, to...
  • All that is small is not nano

    09/13/2009 8:42:30 PM PDT · by neverdem · 2 replies · 366+ views
    Chemistry World ^ | 13 September 2009 | Hayley Birch
    US and French scientists say the term 'nanoparticle' needs to be redefined to provide a focus for environmental, health and safety studies, and future regulation. According to the researchers, nanomaterials should be categorised based on novel properties that are related to their small size - not, crucially, their size alone.In most countries, few or no specific regulations exist to govern the safe use of nanoparticles, despite their wide use in cosmetics, sun screens and some drug products. Until a decision can be reached on what exactly constitutes a nanoparticle, however, there can be no clear path forward. Although traditionally thought...
  • Hybrid nano material targets antibiotic resistant bacteria

    09/09/2009 12:52:33 AM PDT · by neverdem · 1 replies · 405+ views
    Chemistry World ^ | 08 September 2009 | James Urquhart
    German researchers have developed a hybrid, light activated nanomaterial that can target, label and kill harmful antibiotic resistant bacteria such as Escherichia coli. The zeolite-based material may one day play a major role in both diagnosing and treating infectious diseases and possibly cancer, suggests the team.So-called 'photodynamic therapy' is a well-established technique in which a light source is used to trigger the action of a light-sensitive drug, and is already used to treat cancer and macular degeneration. However, scientists have been eager to develop cheaper therapeutic approaches with more functions. One such approach would be to develop a single nanomaterial that...
  • Nanotechnology: Innovation vs. Corporate Welfare

    08/26/2009 8:14:58 PM PDT · by neverdem · 5 replies · 611+ views
    Washington Examiner ^ | 08/26/09 | Ryan Young
    Nanotechnology – the art and science of manipulating matter at the scale of 1 to 100 nanometers – is a field with seemingly limitless potential. But if researchers and politicians = are not careful, that potential will vanish. Nanotech firms have a choice between being entrepreneurs, or being corporate welfare recipients. They choices they make today could determine whether the future of nanotech is one of dynamism and innovation, or one of dull, bureaucratic stasis. A nanotech boom is already underway. Just this week, the number of products that scientists have invented or improved passed the 1,000 mark. In two...
  • Nanoparticle safety in doubt - Lung damage in Chinese factory workers sparks health fears.

    08/22/2009 1:08:50 PM PDT · by neverdem · 8 replies · 951+ views
    Nature News ^ | 18 August 2009 | Natasha Gilbert
    Could nanoparticles cause some lung damage?C. Juste/Miami Herald/Newscom Claims that seven Chinese factory workers developed severe lung damage from inhaling nanoparticles are stoking the debate over the environmental-health effects of nanotechnology.A paper published in the European Respiratory Journal claims to be the first to document cases of ill health caused by nanoparticles in humans (Y. Song, X. Li and X. Du Eur. Respir. J. 34, 559 - 567; 2009). Other experts are sceptical as to whether nanoparticles are actually to blame, but the paper has triggered lively discussions."The study raises the bar for doing appropriate research as fast as possible to...
  • New nanoboxes take shape

    08/21/2009 8:53:41 AM PDT · by neverdem · 13 replies · 748+ views
    Chemistry World ^ | 20 August 2009 | Lewis Brindley
    USresearchers have made nano-sized boxes from nickel and tin - marking the first time that patterned 3D structures have been built on the nanoscale. The boxes and fabrication process could have great potential for making interesting nanostructures, for applications ranging from electronics to drug delivery.'I'm interested in miniaturising the world,' says David Gracias, who led the research at Johns Hopkins University in Baltimore, US. 'We have a lot of nanotechnology techniques that allow us to build very well in 2D - but building in 3D is more difficult.'The cubes resemble tiny dice around 100nm in size - patterned on each side with the university initials,...
  • Near-lightspeed nano spacecraft might be close

    07/13/2009 10:37:27 AM PDT · by LibWhacker · 32 replies · 1,001+ views
    MSNBC ^ | 7/8/09 | Daniel H. Wilson
    Researchers creating the tiny engines that could drive mini-starshipsMassive particle accelerators are exploring the world of the very small, but similar technology may someday propel needle-sized spacecraft to distances on a scale so large as to be almost unimaginable — between star systems. Thanks to research on nano-sized thrusters that act like portable particle accelerators, tiny spacecraft might be accelerated to near-lightspeed and sent to explore nearby stars — perhaps within our lifetimes.
  • Nanocapacitors Offer High Power and Large Storage

    07/02/2009 12:57:02 AM PDT · by neverdem · 9 replies · 900+ views
    thefutureofthings.com ^ | June 29, 2009 | Janice Karin
    Researchers at the University of Maryland in College Park, Maryland have created nanocapacitors capable of both high power concentrations and large storage capacities. Traditionally, capacitors offer high levels of power discharge and batteries offer large amounts of storage but this is the first time scientists have managed to combine both properties in the same device, albeit one too small to be practical.   Arrays of capacitors shown in an electron micrograph overlaid onto a diagram outlining their design (Credit: A. James Clark School of Engineering, University of Maryland) The new battery system, developed by Gary Rubloff and his team...