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Polymer Filter Quickly Makes Water Safe To Drink

by Txchnologist staff

It’s a thirsty world out there. But with much of the globe’s drinking supply unimproved by treatment systems that can remove animal waste, bacteria, viruses, and chemicals, a clean sip of water is too often a luxury. 

Many researchers and inventors are looking for cheaper and faster ways to get clean drinking water to people who lack it. On the industrial scale, people are refining filtration membranes by using advanced materials like graphene to make more efficient potable water supplies. Others are using architecture to make rain-harvesting buildings. For individuals, one designer has made a solar power distiller to turn saltwater fresh. These are just a few examples of a lot of brainpower going in to help around 780 million people who have limited access to clean water.

Now a Swiss Federal Institute of Technology in Zurich (ETHZ) team says they have developed a novel personal filtration tool that will contribute to the solution. Using a three-stage system that includes an advanced polymer membrane, they say the device, called DrinkPure, works so quickly that it can filter up to a liter of water a minute.

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That’s a serious beach umbrella

Engineers last week successfully stacked and unfolded a giant 1 million SPF sunscreen that will protect NASA’s next generation space telescope as it investigates the history and working of the universe.

The tennis court-sized solar shield will protect the James Webb space telescope’s delicate infrared sensors from interference by the sun. It will be folded during launch and unfurl on command once the telescope, the most powerful space observatory ever built, reaches its orbit. 

Deploying the shield will create a hot sun-facing side and cold side pointed away from our star. The observatory’s warm side will reach 185 degrees Fahrenheit, while the cold side will be a chilly -388 degrees F thanks to the sunshield’s five layers that passively radiate incoming solar energy out into space. The sun, Earth and moon will always remain on one side to prevent their infrared energy from swamping the Webb’s sensing equipment, which is designed to pick up the same wavelengths from faint and very distant sources in the universe. 

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Txch This Week: Smart Shoes And Gut Bacteria? There’s An App For That


by Annie Epstein

This week on Txchnologist, we celebrated Robocup 2014, an international robotics competition that was held July 21-24. The event’s long-term goal is to create a robotic soccer team by 2050 that can beat the FIFA World Cup winners. The real question here is what country’s colors the robots will wear.

American and Chinese chemists have discovered that boron forms 40-atom cage structures similar to the way carbon makes soccer-ball-shaped spheres referred to as buckyballs. Boron cages may one day be useful in storing hydrogen or a still unknown range of potential new applications.

In the land down under, researchers at Australia’s Monash University and the University of Melbourne used an advanced imaging sensor taken from a missile called a focal plane array to detect malaria. The sensor detects infrared energy and researchers couple it with an infrared imaging microscope to analyze heat signatures of fatty acids within the parasite.

Learn more about the science week that was below.

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New Technology Could Boost Solar Cell Efficiency By 30 Percent

by Ker Than, Inside Science

Scientists looking to boost the efficiency of solar panels are taking a fresh look at an exotic physics phenomenon first observed nearly 50 years ago in glowing crystals.

Called singlet fission, the process can enable a single photon of light to generate two electrons instead of just one. This one-to-two conversion, as the process is known, has the potential to boost solar cell efficiency by as much as 30 percent above current levels, according to a new review paper published in the Journal of Physical Chemistry Letters.

Singlet fission “was originally proposed to explain some weird results that were observed in fluorescent organic crystals,” said the study’s first author Christopher Bardeen, a chemist at the University of California, Riverside. “It received a lot of attention in the 1960s and 1970s, but then it was mostly forgotten.”

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