3D manufacturing method enables precise nanoscale 3D printing for first time

Researchers at Washington State University have developed a new 3D printing method that for the first time allows materials to be precisely and quickly created between the nanoscale and macroscale. As a result, it can produce materials with a strong structural resemblance to wood or bone.

The research involved the 3D printing of foglike microdroplets that contain nanoparticles of silver. The droplets are deposited at specific locations and as the liquid in the droplet evaporates, the nanoparticles remain to create incredibly delicate looking structures. Despite their apparent delicacy however, the structures are porous, have an extremely large surface area and are very strong.

“This is a groundbreaking advance in the 3D architecturing of materials at nano- to macroscales with applications in batteries, lightweight ultrastrong materials, catalytic converters, supercapacitors and biological scaffolds,” said Rahul Panat, associate professor in the School of Mechanical and Materials Engineering, who led the research.

“This technique can fill a lot of critical gaps for the realization of these technologies.”

Silver was used for the initial research due to its easy workability. However, Panat says that any other material that can crushed into nanoparticles, a description that applies to nearly all materials, could be used in place of silver.

The manufacturing method itself bears resemblance to a natural, although rare, process found over the western African deserts. In these deserts, crystalline flower-like structures known as “desert roses” form when tiny fog droplets containing sulphur evaporate over the heat of the desert earth.

Mirroring this phenomenon, the researchers’ method produced a variety of structures, including microscaffolds that contain solid truss members like a bridge, electronic connections that resemble accordion bellows, doughnut-shaped pillars or spirals. Thanks to the basis in 3D printing, they were able to do so highly efficiently, allowing for the possibility of scaling up to large-scale manufacturing.

Image courtesy of Washington State University

Going forward, the research team believes that their method can be used in a number of industrial applications. Due to the minimal waste produced and the speed of manufacture, the development of such nanoscale and porous metal structures is applicable to, for example, the development finely detailed, porous anodes and cathodes for batteries, rather than the solid structures that are now used.

If successful on this front, the researcher’s work would transform the way in which the industry operates. The shift from solid structure to porous anodes could drastically increase battery speed and capacity and, furthermore, allow the energy industry to make use of new and higher energy materials.

Panat was assisted in the project by graduate students Mohammad Sadeq Saleh and Chunshan Hu. The research is in keeping with WSU’s Grand Challenges initiative stimulating research to address some of society’s most complex issues. The team’s work is reported on in the Science Advances journal and they have filed for a patent on the method.

Wanted man captured thanks to facial recognition

A Chinese man who was wanted by police for “economic crimes” – which can include anything from tax evasion to the theft of public property – was arrested at a music concert in China after facial recognition technology spotted him inside the venue.

Source: Abacus News

SpaceX president commits to city-to-city rocket travel

SpaceX president and chief operating officer Gwynne Shotwell has reiterated the company’s plans to make city-to-city travel — on Earth — using a rocket that’s designed for outer space a reality. Shotwell says the tech will be operational “within a decade, for sure.”

Source: Recode

Businessman wins battle with Google over 'right to be forgotten'

A businessman fighting for the "right to be forgotten" has won a UK High Court action against Google.. The businessman served six months’ in prison for “conspiracy to carry out surveillance”, and the judge agreed to an “appropriate delisting order".

Source: Press Gazette

UK launched cyber attack on Islamic State

The UK has conducted a "major offensive cyber campaign" against the Islamic State group, the director of the intelligence agency GCHQ, Jeremy Fleming, has revealed. The operation hindered the group's ability to co-ordinate attacks and suppressed its propaganda.

Source: BBC

Goldman Sachs consider whether curing patients is bad for business

Goldman Sachs analysts have attempted to tackle the question of whether pioneering "gene therapy" treatment will be bad for business in the long run. "Is curing patients a sustainable business model?" analysts ask in a report entitled "The Genome Revolution."

Source: CNBC

Four-armed robot performing surgery in the UK

A £1.5m "robotic" surgeon, controlled using a computer console, is being used to shorten the time patients spend recovering after operations. The da Vinci Xi machine is the only one in the country being used for upper gastrointestinal surgery.

Source: BBC

Virgin Galactic rocket planes go past the speed of sound

Virgin Galactic completed its first powered flight in nearly four years when Richard Branson's space company launched its Unity spacecraft, which reached supersonic speeds before safely landing. “We’ve been working towards this moment for a long time,” Virgin Galactic CEO George Whitesides said in an email to Quartz.

Source: Quartz

Google employees protest being in "the business of war"

Thousands of Google employees, including dozens of senior engineers, have signed a letter protesting the company’s involvement in a Pentagon program that uses AI to interpret video imagery and could be used to improve the targeting of drone strikes. The letter, which is circulating inside Google, has garnered more than 3,100 signatures

Source: New York Times

Computer system transcribes words users “speak silently”

MIT researchers have developed a computer interface that transcribes words that the user verbalises internally but does not actually speak aloud. The wearable device picks up neuromuscular signals in the jaw and face that are triggered by internal verbalisations — saying words “in your head” — but are undetectable to the human eye.

Source: MIT News

Drones could be used to penalise bad farming

A report by a coalition of environmental campaigners is arguing squadrons of drones should be deployed to locate and penalise farmers who let soil run off their fields. Their report says drones can help to spot bad farming, which is said to cost more than £1.2bn a year by clogging rivers and contributing to floods.

Source: BBC

Californian company unveil space hotel

Orion Span, a California company, has unveiled its Aurora Station, a commercial space station that would house a luxury hotel. The idea is to put the craft in low-earth orbit, about 200 miles up, with a stay at the hotel likely to cost $9.5 million for a 12-day trip, but you can reserve a spot now with an $80,000 deposit.

UK mobile operators pay close to £1.4bn for 5G

An auction of frequencies for the next generation of mobile phone networks has raised £1.36bn, says regulator Ofcom. Vodafone, EE, O2 and Three all won the bandwidth needed for the future 5G mobile internet services, which are not expected to be launched until 2020.

Source: BBC