Nature describes (and even has photos of) an electronic mesh that can be rolled up and squirted out of a syringe into a mouse brain where it can monitor (and stimulate) individual neurons: If eventually shown to be safe, the soft mesh might even be used in humans to treat conditions such as Parkinson’s disease, says Charles Lieber, a chemist at Harvard University on Cambridge, Massachusetts, who led the team. The work was published in Nature Nanotechnology on 8 June. … So far, even the best technologies have been composed of relatively rigid electronics that act like sandpaper on delicate neurons. They also struggle to track the same neuron over a long period, because individual cells move when an animal breathes or its heart beats. The Harvard team solved these problems by using a mesh of conductive polymer threads with either nanoscale electrodes or transistors attached at their intersections. Each strand is as soft as […]
These are prehistoric animals compared to their modern relatives and, for scale, a human. A human who’s interested in what they’re like… except when…
Look out! HELL PIG!
There are plenty more of the majestic giants (and some terrifying ones) at NPR’s Skunk Bear tumblog.
The New Horizons Long Range Reconnaissance Imager (LORRI) snapped this photo of Jupiter’s ring system on February 24, 2007, from a distance of 7.1 million kilometers (4.4 million miles).
This processed image shows a narrow ring, about 1,000 kilometers (600 miles) wide, with a fainter sheet of material inside it. The faint glow extending in from the ring is likely caused by fine dust that diffuses in toward Jupiter. This is the outer tip of the “halo,” a cloud of dust …
SOURCE:Based on “NASA Windbots Could Explore Gas Giant Jupiter”, Sky News, 24 July 2015, as used in the post as used in the post “Windbots to explore Jupiter – the bumpier the ride, the better..”
ABSTRACT: The planet Jupiter is 35 light-minutes from Earth (give or take a couple of minutes depending on where in its orbit the planet is).
So a robot floating in the turbulent winds of Jupiter would take that long to send a mes…
Three names for one little fish. And those are just the beginning.
I found this one on the Scientific Illustration tumblog, which quoted Wikipedia on the doree (etc.):
John Dory, St Pierre or Peter’s Fish, refers to fish of the genus Zeus, especially Zeus faber, of widespread distribution. It is an edible benthic coastal marine fish with a laterally compressed olive-yellow body which has a large dark spot, and long spines on the dorsal fin. The dark spot is used to flash an ‘evil ey…
These are ostensibly Cochin chickens, or forerunners of what we’d call Cochins today. They’re a breed with a *lot* of character, and are uniquely suited, temperamentally, for being “pet” chickens moreso than egg factories or walking meat supplies. Despite the name (after a part of India), they’re originally from China.
It’s the most Earth-like planet yet discovered. Kepler 452b sits in the “Goldilocks” zone around its star, not too hot and not too cold, and is about the same size (or is a little larger) and made of something like the same stuff as the planet we’re sitting around on right now. It takes 365 days to orbit around its sun, too. NASA’s calling it ou…
Can’t beat NBC’s headline for this: Insects Wear Tiny Spacesuits, for Science: Scanning electron microscopes (SEM) provide incredibly detailed images of biological specimens, but the instruments have not been able to image living organisms because of the powerful vacuum environment required. But now, a team of researchers has developed a way to image mosquitoes and other insects in an SEM, by wrapping them in a substance that keeps the organisms alive, without interfering with the imaging process. There’s a video of the nano-suits (1,000th the width of a human hair) in action.
Science Daily explores the weird, microscopic world of making ceramics that can bend and twist and smush and reform: Caltech materials scientist Julia Greer and her colleagues…explain how they used the method to produce a ceramic (e.g., a piece of chalk or a brick) that contains about 99.9 percent air yet is incredibly strong, and that can recover its original shape after being smashed by more than 50 percent. “Ceramics have always been thought to be heavy and brittle,” says Greer, a professor of materials science and mechanics in the Division of Engineering and Applied Science at Caltech. “We’re showing that in fact, they don’t have to be either. This very clearly demonstrates that if you use the concept of the nanoscale to create structures and then use those nanostructures like LEGO to construct larger materials, you can obtain nearly any set of properties you want. You can create materials by design.”. … They found […]
Nature is sharing a fun little recipe for whipping up the super-material graphene in a kitchen blender: In Nature Materials, a team led by [Jonathan] Coleman [at Trinity College, Dublin,] (and funded by the UK-based firm Thomas Swan) describe how they took a high-power (400-watt) kitchen blender and added half a litre of water, 10–25 millilitres of detergent and 20–50 grams of graphite powder (found in pencil leads). They turned the machine on for 10–30 minutes. The result, the team reports: a large number of micrometre-sized flakes of graphene, suspended in the water. Coleman adds, hastily, that the recipe involves a delicate balance of surfactant and graphite, which he has not yet disclosed (this barrier dissuaded me from trying it out; he is preparing a detailed kitchen recipe for later publication). And in his laboratory, centrifuges, electron microscopes and spectrometers were also used to separate out the graphene and test the outcome. … “It is […]
Or: “Weird substance gets weirder.” Nature has more on how the latest tests have thrown models of how carbon circuits are supposed to work into disarray: In graphene, electrons can move faster than in any other material at room temperature. But techniques that cut sheets of graphene into the narrow ribbons needed to form wires of a nano-scale circuit leave ragged edges, which disrupt the electron flow (see ‘Graphene: The quest for supercarbon’). Now a team led by physicist Walt de Heer at the Georgia Institute of Technology in Atlanta has made ribbons that conduct electric charges for more than 10 micrometres without meeting resistance — 1,000 times farther than in typical graphene nanoribbons. The ribbons made by de Heer’s team in fact conduct electrons ten times better than standard theories of electron transport suggest they should, say the authors. This unimpeded motion means that circuits could transmit signals faster and without the overheating issues […]
Remember the superhero fashion designer in The Incredibles? Nature unfolds the true story of a “super-material” that repels liquids so well, it resists molten metal: Kripa Varanasi, a mechanical engineer at the Massachusetts Institute of Technology in Cambridge, and his colleagues used a water-repellent material which they further engineered by adding tiny ridges 0.1 millimetres high. They then recorded water droplets hitting the surface with a high-speed camera that filmed at 10,000 frames per second or more. The ridges forced the liquid to splash asymmetrically, so that it recoiled faster than on a macroscopically smooth surface. The time that the water spent in contact with the surface fell by 37% compared to the same material with no ridges, the authors measured. The researchers repeated the experiment with droplets of molten tin. On a surface without ridges, the liquid metal quickly solidified. But the effect of the ridges was strong enough to make the droplets bounce […]
We’re getting closer to having hologram projectors in our pockets, as befits people living in the future. PhysOrg reports on the latest step – a system that converts mobile-device displays into three-dimensional images: Launched earlier this year, EyeFly3D, the first glasses-free 3D accessory for smartphones, has just picked up its first award from IES. The technology is based on a simple concept of taking a regular plastic film and engineering about half a million uniform-sized mini lenses onto its surface, turning the plastic into an add-on screen protector that produces unprecedented, distortion-free, brilliant 3D content on mobile devices. … For this engineering feat, scientists from A*STAR’s IMRE and TP employ a combination of materials nanotechnology and integrated software, using a unique nanoimprinting process on the plastic – akin to making a waffle – to create an array of high resolution lenses. The engineered lenses are so small that they are barely visible to the human […]
PhysOrg has the brilliant news about using itty bitty flecks of precious stones to boost the power of medication to treat exceptionally stubborn cases of leukemia: Daunorubicin is currently one of the most common drugs used to treat leukemia. The drug works by slowing down or stopping cancer cells from growing, causing many of them to die. It is also common, however, for leukemia to become resistant to this drug after treatment. One mechanism by which this opposition, commonly known as chemoresistance, happens is through the expression of drug transporter pumps in leukemia cells that actively pump out chemotherapeutics, including Daunorubicin. … The team of scientists from NUS and UCLA turned to nanodiamonds, which are tiny, carbon-based particles that are 2 to 8 nanometers in diameter, as an option to address chemoresistance. Dr Chow studied the biological basis of how nanodiamonds can potentially overcome chemoresistance. The scientists bound the surfaces of nanodiamonds with Daunorubicin, and […]
This is a buckyball crystal, a form of carbon that no one had ever seen until the 1980s. Now, it’s starting to get used in all kinds of unexpected ways. Formally, this stuff is is known as Carbon-60 or buckminsterfullerene, because the molecule looks so much like a geodesic dome as envisioned by R. Buckminster Fuller. Because of its weird shape, fulleride can do strange things at the sub-molecular level. In some ways, the discovery of buckyballs marked the dawn of nanotechnology. And also a great missed advertising opportunity for professional soccer….
Wired reveals the weird ways nanotechnologists are making sound behave like light… this time, by creating a Star Trek weapon in the lab: Because laser is an acronym for “light amplification by stimulated emission of radiation,” these new contraptions – which exploit particles of sound called phonons – should properly be called phasers. Such devices could one day be used in ultrasound medical imaging, computer parts, high-precision measurements, and many other places. … “In our work, we got rid of this optical part,” said engineer Imran Mahboob of NTT Basic Research Laboratories in Japan, co-author of a paper describing the new sound lasers that appears Mar. 18 in Physical Review Letters. Because they need one less part, these new phasers “are much easier to integrate into other applications and devices.” In traditional lasers, a bunch of electrons in a gas or crystal are excited all at the same time. When they relax back to their […]
The Economist is gazing into the pretty colors…not of quantum computers, but quantum television screens: An LCD screen works with a backlight shining through red, blue or green filters to produce the pixels which make up an image. Many televisions use light-emitting diodes (LEDs) as the backlight because they are brighter and use less power than fluorescent bulbs. Sony’s new televisions uses quantum dots with conventional LEDs to produce a hybrid backlight of greater intensity. In time, though, quantum dots might be used directly as the coloured pixels on screens. When a voltage is applied to a quantum dot it causes electrons contained in the crystal to release energy in the form of light. Changing the size of the dots changes the amount of energy released, which in turn determines the wavelength, and therefore the colour of the emitted light. This means they can be made into nanoscopic LEDs and, in principle, be tailored to […]
Extreme Tech gets right to the point of a new technology – a mechanical pencil that can draw functional electronic circuits: With MIT’s carbon nanotube pencil, the lead is formed by compressing single-walled carbon nanotubes (SWCNT), until you have a substance that looks and behaves very similarly to graphite. The difference, though, is that drawing with MIT’s pencil actually deposits whole carbon nanotubes on paper — and carbon nanotubes have some rather exciting properties. In this case, MIT is utilizing the fact that SWCNTs are very electrically conductive — and that this conductivity can be massively altered by the introduction of just a few other atoms, namely ammonia. … There are two main takeaways here. The first is that MIT has found a form of carbon nanotubes that is stable, safe, and cheap to produce. Second, carbon nanotubes have been used in sensors before, but usually the process involves dissolving SWCNTs in solvents, which can […]
Graphene, as we all now know, is the latest strange form of carbon to wow material scientists with its unusual properties. Well, New Scientist shows that graphene is even stranger than we thought, turning regular old electricity into ultra-focused plasmons: When light hits some materials in just the right way, ripples of electrons called plasmons appear on the surface. These rippling surfaces can focus light through openings smaller than light’s wavelength, so might allow microscopes with unprecedented resolution. … “We can basically turn plasmons on and off, something you cannot do with metals,” says Dmitri Basov of the University of California, San Diego, who led one of the teams. As well as microscopes, the ability to switch plasmons could be useful when building circuits and also metamaterials, which can bend light around objects by controlling its path. Getting closer to magic every day.
I’m getting this from Nature, although New Scientist has also been covering it. A group called “the Olga Cell of the Informal Anarchist Federation International Revolutionary Front” is waging war – with guns and bombs – against nuclear researchers and nanotechnologists: The Olga Cell, named after an imprisoned Greek anarchist, is part of the Informal Anarchist Federation, which, in April 2011, claimed responsibility for sending a parcel bomb that exploded at the offices of the Swiss nuclear lobby group, Swissnuclear, in Olten. A letter found in the remains of the bomb demanded the release of three individuals who had been detained for plotting an attack on IBM’s flagship nanotechnology facility in Zurich earlier that year. In a situation report published this month, the Swiss Federal Intelligence Service explicitly linked the federation to the IBM attack. The Informal Anarchist Federation argues that technology, and indeed civilization, is responsible for the world’s ills, and that scientists are […]
New Scientist does its best to make nanomaterials sexy… like the new silicon stuff that’s stealing carbon’s limelight: Patrick Vogt of Berlin’s Technical University in Germany, and colleagues at Aix-Marseille University in France created silicene by condensing silicon vapour onto a silver plate to form a single layer of atoms. They then measured the optical, chemical and electronic properties of the layer, showing it closely matched those predicted by theory (Physical Review Letters, DOI: 10.1103/PhysRevLett.108.155501). Silicene may turn out to be a better bet than graphene for smaller and cheaper electronic devices because it can be integrated more easily into silicon chip production lines.