Magnetic ink to make 3D printed, self-healing electronics a reality

A new magnetic ink has been developed that will be capable of being used to create self-healing batteries, electrochemical sensors and wearable, textile-based electrical circuits. The ink has already shown to repair more damage and at a quicker speed than current self-healing systems.

Developed by a team of engineers at the University of California San Diego, the ink’s key ingredient is microparticles that are oriented in a certain configuration by a magnetic field.

Because of the orientation of these particles, any tear in a device printed with the ink will self-heal as particles on both sides of the tear are magnetically attracted to one another.

The ink has already set records by repairing tears as wide as 3mm, a new high in the field of self-healing systems.

“Our work holds considerable promise for widespread practical applications for long-lasting printed electronic devices,” said Joseph Wang, director of the Center for Wearable Sensors and chair of the nanoengineering department at UC San Diego.

A demonstration of the magnetic ink, which was printed as a self-healing circuit onto a t-shirt, before being cut and repairing itself. Image courtesy of Jacobs School of Engineering/UC San Diego

A demonstration of the magnetic ink, which was printed as a self-healing circuit onto a t-shirt, before being cut and repairing itself

In addition to the extent of damage the ink allows devices to repair, it is also notable for its ability to do so without any outside catalyst.

Existing systems require external triggers to begin the healing process, and can take anywhere between a few minutes to several days to do so. By contrast, the new system requires no external trigger and repairs damage within roughly 50 milliseconds.

The engineers tested their system by printing batteries, electrochemical sensors and wearable, textile-based electrical circuits that they then set about damaging by cutting them and pulling them apart to create increasingly wide gaps. The devices were damaged nine times at the same location, as well as having damage inflicted in four different places on the same device.

Despite the extensive and repeated damage, the devices continued to heal themselves and recover function, losing only a minimal amount of conductivity.

For example, a self-healing circuit was printed on the sleeve of a T-shirt and connected to an LED light and a coin battery. The circuit and the fabric it was printed on were then cut, resulting in the LED turning off. Within a few seconds, however, it started turning back on as the two sides of the circuit came together and healed.

A second demonstation of the ink's healing capabilities. Image courtesy of Jacobs School of Engineering/UC San Diego

A second demonstration of the ink’s healing capabilities. Image courtesy of Jacobs School of Engineering/UC San Diego

“We wanted to develop a smart system with impressive self-healing abilities with easy-to-find, inexpensive materials,” said Amay Bandodkar, one of the papers’ first authors, who earned his Ph.D. in Wang’s lab and is now a postdoctoral researcher at Northwestern University.

The engineers envision that, in the future, they will be able to expand the range of applications for the ink by making use of different variations with different ingredients.

Additionally, they plan to test different self-healing ink recipes in silicon through computer simulations, before taking them for lab testing.

China planning to end sales of fossil-fuel-powered vehicles

Xin Guobin, China's vice minister of industry and information technology, has said the government is working with regulators to put in place a timetable to end the production and sale of cars powered by fossil fuels. It's hoped the move will accelerate the expansion of the electric car market.

Source: Bloomberg

Limited Tesla Autopilot was "partly to blame" for crash

The US National Transportation Safety Board (NTSB) has found that Tesla's Autopilot system was partly to blame for a fatal accident in which a Model S collided with a lorry. The safety board concluded that Tesla allowed the driver to use the system outside of the environment for which it was designed,

Source: BBC

Chelsea Manning warns about the risks of AI

During a conversation at Noisebridge hackerspace, Chelsea Manning commented on some of the inherent risks of AI. "We’re now using huge datasets with all kinds of personal data, that we don’t even know what information we’re putting out there and what it’s getting collected for," Manning said.

Source: Ars Technica

US government bans Kaspersky software from its agencies

The Department of Homeland security has ordered government agencies to stop using software products made by Kaspersky Lab because of possible ties between Kaspersky officials and Russian intelligence. The process of discontinuing Kaspersky products is expected to begin within 90 days.

Source: Ars Technica

Hyperloop One selects ten possible routes for the first hyperloop

Hyperloop One has announced that it has selected ten proposed routes for the first hyperloop. The company also announced that it would “commit meaningful business and engineering resources and work closely with each of the winning teams/routes to determine their commercial viability”.

Source: Inverse

Artificial 'skin' gives robotic hand a sense of touch

A team of researchers from the University of Houston has reported a breakthrough in stretchable electronics that can serve as an artificial skin, allowing a robotic hand to sense the difference between hot and cold, while also offering advantages for a wide range of biomedical devices.

Source: Science Daily

The plan to make every surface inside the car of the future smart

Yanfeng Automotive Interiors (YFAI) has revealed a vision for the future of cars where every surface inside the vehicle can become a smart surface.

Launched at the International Auto Show, YFAI’s activeSkin concept will turn the largely decorative surfaces inside cars, including the door trim, floor console and instrument panel, into smart interior surfaces, which YFAI says will be “fully interactive” and could be ready by 2022.

“The future generation of surfaces will be smarter than ever. Just by passing your hand over a upholstered surface of the car will appear an interactive surface or dynamic decorative ambient light. Surfaces interact with us, “says Han Hendriks , YFAI’s chief technology officer.

“This technology is impressive.”

Images courtesy of YFAI

YFAI says its customisable 3D glass surfaces could benefit drivers by replacing some of the current operating elements in traditional cars.

However, If no information is called up by the driver, integrated screens and operating surfaces would remain invisible as purely decorative glass surfaces, so drivers would not be distracted by unnecessary information popping up.

“We offer on-demand functionality, so it will only be visible when you need it. In this way we will be able to customise features on interior surfaces,” said Hendriks. “With activeSkin we can achieve a 3D effect that gives a feeling of amazing depth.”

This isn’t the first time YFAI has tried to predict what cars of the future will be like.

The company’s XiM17 concept car was designed with autonomous driving in mind and helped answer the question, “What will people do in their vehicle, if they no longer have to drive?”

YFAI’s XiM17 allows passengers to switch between a number of different modes to allow passengers a number of different ways of engaging.

For example, in family mode all four seats in the car are positioned facing each other, whereas in meeting mode the rear seats are folded away. so that the driver and passenger seats face each other. and a floor console rises to form a desk.