University of Cambridge researchers have built the world's smallest working engine. The device, powered by light, could be the basis of future nanoscale machines that are just billionths of a meter in size. Fantastic Voyage, here we come! From the University of Cambridge:
The prototype device is made of tiny charged particles of gold, bound together with temperature-responsive polymers in the form of a gel. When the ‘nano-engine’ is heated to a certain temperature with a laser, it stores large amounts of elastic energy in a fraction of a second, as the polymer coatings expel all the water from the gel and collapse. This has the effect of forcing the gold nanoparticles to bind together into tight clusters. But when the device is cooled, the polymers take on water and expand, and the gold nanoparticles are strongly and quickly pushed apart, like a spring. The results are reported in the journal PNAS.
“It’s like an explosion,” said Dr Tao Ding from Cambridge’s Cavendish Laboratory, and the paper’s first author. “We have hundreds of gold balls flying apart in a millionth of a second when water molecules inflate the polymers around them.”
“We know that light can heat up water to power steam engines,” said study co-author Dr Ventsislav Valev, now based at the University of Bath. “But now we can use light to power a piston engine at the nanoscale.”
"Little ANTs: researchers build the world’s tiniest engine" (Thanks, Brad Wieners!)
"Light-induced actuating nano transducers" (PNAS) Read the rest
For more than two decades, nonscientists and engineers have made molecular-scale motor, switches, propellers, ratchets, and even the "nanocar" above that rolls when its metal "road" is heated. But what can we actually do with these things? The journal Nature looks at today's efforts to develop useful applications for molecular machines, from drug delivery systems inside the body to a new kind of high-density molecular memory for computers. Read the rest
Back in 2006, I had an epiphany. Stories are empathy engines, regardless of the medium. And for humans, they always have been. We’ve been primed to imagine other’s lives since we sat in a cave, telling the stories of our tribe and making sense of the world around us. I published an academic paper on this in 2008 and have given talks about storytelling and empathy ever since. I’m thrilled that there are now hundreds of researchers around the world searching for the neurological mechanisms that link “theory of mind networks” to empathy and narratives.
PJ Manney's (R)evolution is available from Amazon.
In addition, I’ve been a futureholic throughout my life. Whether through science fact or fiction, I’ve wanted to know what was coming and how it might change everything we know. The future is very heady, complex stuff, and difficult to communicate to those who aren’t on your metaphorical wavelength, since change is inherently hard to understand or accept. With my novel, (R)evolution, I felt it was important to share research on nanotechnology and cognitive technologies like brain-computer interfaces, nanomedicine and more with an audience that might not read SF or know what is coming.
My parents are my sample audience. My father is a huge SF fan and the reason I am, too. Future-shorthand is easy with him. But my mother is so ignorant of SF, when we visited Industrial Light and Magic in 1980, she hadn’t seen Star Wars (and still hasn’t) and didn’t recognize the Yoda puppet! Read the rest
This is a flexible mesh circuitry that Harvard nanotechnologists have injected via syringe into the heads of live mice to test a new way of monitoring brain signals from the inside. Read the rest
A German startup called Nanoscribe says it will ship a nanoscale 3D printer in the second quarter of 2013, and that its device will run 100 times faster than similar devices currently in the market:
The technology behind most 3-D microprinters is called two-photon polymerization. It involves focusing tiny, ultrashort pulses from a near-infrared laser on a light-sensitive material. The material polymerizes and solidifies at the focused spots. As the laser beam moves in three dimensions, it creates a 3-D object.
Today’s printers, including Nanoscribe’s present system, keep the laser beam fixed and move the light-sensitive material along three axes using mechanical stages, which slows down printing. To speed up the process, Nanoscribe’s new tool uses a tiny moving mirror to reflect the laser beam at different angles. Thiel says generating multiple light beams with a microlens array could make the process even faster.
The smallest features that can be created using the Nanoscribe printer measure about 30 nanometers, says Julia Greer, professor of materials science at the California Institute of Technology.
Micro 3-D Printer Creates Tiny Structures in Seconds [Prachi Patel/MIT Technology Review]
(via Beyond the Beyond) Read the rest
Last year, I told you about Individuals Tending Towards Savagery, a terrorist group that has mailed bombs to nanotechnology researchers in Mexico, Chile, France, and Spain. Their stated goal: Stop technological innovation. And they aren't alone.
At Nature News Leigh Phillips reports on a group called the Olga Cell of the Informal Anarchist Federation, which is dedicated to the suppression of science in general and technological innovation in particular. The group is behind several bombings and shootings, mostly targeting nuclear scientists and nuclear energy advocacy groups. Now, the Olga Cell says that it's joining forces with other anti-science terrorist groups around the world. This group is apparently communicating with Individuals Tending Towards Savagery, though it's not clear how close the collaboration is.
Read the rest
On 11 May, the cell sent a four-page letter to the Italian newspaper Corriere della Sera claiming responsibility for the shooting of Roberto Adinolfi, the chief executive of Ansaldo Nucleare, the nuclear-engineering subsidiary of aerospace and defence giant Finmeccanica. Believed by authorities to be genuine, the letter is riddled with anti-science rhetoric. The group targeted Adinolfi because he is a “sorcerer of the atom”, it wrote. “Adinolfi knows well that it is only a matter of time before a European Fukushima kills on our continent.”
“Science in centuries past promised us a golden age, but it is pushing us towards self-destruction and total slavery,” the letter continues. “With this action of ours, we return to you a tiny part of the suffering that you, man of science, are pouring into this world.” The group also threatened to carry out further attacks.
Markoff in the New York Times
: "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." And, what is possible has big implications on the future of computing. Read the rest