New ultra-high resolution printer makes colors from nanostructures

Researchers from the Technical University of Denmark demonstrated a new nanotechnology-based printing technique that produces long-lasting color images on plastic at resolutions up to 127,000 dots per inch, many times more detailed than traditional laser printers. The system uses a laser to alter the structure of nanoscale structures on the plastic material. (A nanometer is one-billionth of a meter; a human hair is around 60,000 nanometers in diameter.) The nanoprinting technique could also lead to new kinds of 3D displays or invisible watermarks. From New Scientist:

The surface of the plastic is shaped so that it has lots of tiny pillars, one roughly every 200 nanometers. A thin film of the element germanium is then spread over the plastic. Heat from a laser melts the germanium on each pillar, morphing its shape and thickness. As a result, it reflects a specific color. The coating protects the shapes of the newly carved nanostructures.

Resonant laser printing of structural colors on high-index dielectric metasurfaces (ScienceAdvances) Read the rest

Thinnest-ever electronic tattoos are capable of precision health monitoring

The graphene temporary tattoo seen here is the thinnest epidermal electronic device ever and according to the University of Texas at Austin researchers who developed it, the device can take some medical measurements as accurately as bulky wearable sensors like EKG monitors. From IEEE Spectrum:

Graphene’s conformity to the skin might be what enables the high-quality measurements. Air gaps between the skin and the relatively large, rigid electrodes used in conventional medical devices degrade these instruments’ signal quality. Newer sensors that stick to the skin and stretch and wrinkle with it have fewer airgaps, but because they’re still a few micrometers thick, and use gold electrodes hundreds of nanometers thick, they can lose contact with the skin when it wrinkles. The graphene in the Texas researchers’ device is 0.3-nm thick. Most of the tattoo’s bulk comes from the 463-nm-thick polymer support.

The next step is to add an antenna to the design so that signals can be beamed off the device to a phone or computer, says (electrical engineer Deji) Akinwande.

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Thought-controlled nanorobots in your body

A team of Israeli scientists devised a system by which a person can use their thoughts alone to trigger tiny DNA-based nanorobots inside a living creature to release a drug.

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Electronic temporary tattoo measures how drunk you are

University of California San Diego nanoengineers developed a flexible, wearable sensor that measures the blood alcohol level of its wearer and transmits the info to a mobile device. From UCSD News:

The device consists of a temporary tattoo—which sticks to the skin, induces sweat and electrochemically detects the alcohol level—and a portable flexible electronic circuit board, which is connected to the tattoo by a magnet and can communicate the information to a mobile device via Bluetooth.

The device could be integrated with a car’s alcohol ignition interlocks, or friends could use it to check up on each other before handing over the car keys, he added.

“When you’re out at a party or at a bar, this sensor could send alerts to your phone to let you know how much you’ve been drinking,” said Jayoung Kim, a materials science and engineering PhD student.

"Noninvasive Alcohol Monitoring Using a Wearable Tattoo-Based Iontophoretic-Biosensing System" (ACS Sensors)

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Scientists built the world's smallest nano-engine

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

Nanotechnology coming of age (finally)?

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

5 tips for writing science fiction to engage people who don't read it

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

Flexible circuit injected into living animals' brains

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

Nanoscale 3D printer that runs 100x faster than current models

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

Anarchist group targets scientists in terrorist attacks

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.

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.

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Big news in small things: new nanotechnology findings found by IBM researchers

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