Researchers have developed a new kind of semiconductor alloy capable of capturing the near-infrared light located on the edge of the visible light spectrum.

Easier to manufacture and at least 25 percent less costly than previous formulations, it’s believed to be the world’s most cost-effective material that can capture near-infrared light—and is compatible with the gallium arsenide semiconductors often used in concentrator photovoltaics.

Concentrator photovoltaics gather and focus sunlight onto small, high-efficiency solar cells made of gallium arsenide or germanium semiconductors. They’re on track to achieve efficiency rates of over 50 percent, while conventional flat-panel silicon solar cells top out in the mid-20s.

“Flat-panel silicon is basically maxed out in terms of efficiency,” says Rachel Goldman, a professor of materials science and engineering, as well as physics at the University of Michigan, whose lab developed the alloy. “The cost of silicon isn’t going down and efficiency isn’t going up. Concentrator photovoltaics could power the next generation.”

Varieties of concentrator photovoltaics exist today. They are made of three different semiconductor alloys layered together. Sprayed onto a semiconductor wafer in a process called molecular-beam epitaxy—a bit like spray painting with individual elements—each layer is only a few microns thick. The layers capture different parts of the solar spectrum; light that gets through one layer is captured by the next.

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Scientists have found a way to wirelessly transmit electricity to a nearby moving object.

The method may have applications in transportation, medical devices, and more. If electric cars could recharge while driving down a highway, for example, it would virtually eliminate concerns about their range and lower their cost, perhaps making electricity the standard fuel for vehicles.

“In addition to advancing the wireless charging of vehicles and personal devices like cellphones, our new technology may untether robotics in manufacturing, which also are on the move,” says Shanhui Fan, a professor of electrical engineering at Stanford University and senior author of the study.

“We still need to significantly increase the amount of electricity being transferred to charge electric cars, but we may not need to push the distance too much more,” he says.

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Image: Open Water Power

Unpiloted underwater vehicles (UUVs) are used for a wide array of tasks, including exploring ship wreckage, mapping the ocean floor, and military applications. Now, a team from MIT has developed an aluminum-water power system that will allow UUVs to become safer, more durable, and have ten times more range compared to UUVs powered by lithium-ion batteries.

“Everything people want to do underwater should get a lot easier,” says Ian Salmon Mckay, co-inventor of the device. “We’re off to conquer the oceans.”

The aluminum-water power system is a direct response to lithium-ion batteries, which have a limited energy density causing service ships to chaperone UUVs while at sea, recharging the batteries when necessary. Additionally, UUV lithium-ion batteries have to be encased in expensive metal pressure vessels, making the battery both short-lived and pricey for use in UUVs.

This from MIT:

In contrast, [Open Water Power’s] power system is safer, cheaper, and longer-lasting. It consists of a alloyed aluminum, a cathode alloyed with a combination of elements (primarily nickel), and an alkaline electrolyte that’s positioned between the electrodes.

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In May 2017, we sat down with Kathy Ayers, vice president of research and development for Proton OnSite, at the 231st ECS Meeting in New Orleans. The conversation was led by Amanda Staller, web content specialist at ECS.

Ayer’s work focuses on a multitude of energy technologies, including fuel cells, batteries, and solar cells. Currently, her work targets the production of hydrogen by PEM electrolysis. She has been a member of ECS since 1999, lending her expertise to various Society programs and meeting symposia along the way.

Listen to the podcast and download this episode and others for free through the iTunes Store, SoundCloud, or our RSS Feed. You can also find us on Stitcher and Acast.

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A journal’s impact factor looks at the number of citations within a particular year, but the significance of some research exceeds a one year time frame. To highlight these papers, Google Scholar released their Classic Papers collection, which highlights highly-cited papers that have stood the test of time.

“This release of classic papers consists of articles that were published in 2006 and is based on our index as it was in May 2017,” Sean Henderson, software engineer at Google Scholar, said in a release. “The list of classic papers includes articles that presented new research. It specifically excludes review articles, introductory articles, editorials, guidelines, commentaries, etc. It also excludes articles with fewer than 20 citations and, for now, is limited to articles written in English.”

In the category of electrochemistry, works by ECS members Gleb Yushin, Christopher Johnson, Yuri Gogotsi, and Bernard Tribollet made the list.

Additionally, Michael Graetzel’s 2006 paper published in the Journal of The Electrochemical Society (JES), “Highly Efficient Dye-Sensitized Solar Cells Based on Carbon Black Counter Electrodes,” claimed the number eight spot.

“A journal from a professional society like ECS will look at the value of the science as the value of the science and not necessarily what its pizzazz is at that particular time,” Robert Savinell, editor of JES, told ECS in a recent podcast. “I think that’s one of the reasons we have this 10 year impact factor that’s at the top of the list. We’re looking at quality of the science in the long term.”

By: Delaney Hellman, ECS Development Associate

ECS is proud to announce that at the upcoming 232nd ECS Meeting, we will be hosting our first OpenCon satellite event! OpenCon is a conference that places a spotlight, produces discussion, and increases collaboration on issues of open access, open science, open data, open source, and open education. Initially hosted by the Right2Research Coalition and SPARC, satellite events can be held by anyone with an interest in the subject matter. As ECS works to advance its Free the Science initiative, we want to be at the forefront of the open discussion in our industry.

The event is completely free to attend on October 1, from 2:00 – 6:00 pm.

Don’t miss speakers from Dryad, The Gates Foundation, SPARC, Center for Open Science, and more.

RSVP as soon as possible: http://www.opencon2017.org/ecs_opencon_2017

By: Delaney Hellman, ECS Development Associate

Sci-Hub launched a few years back when Alexandra Elbakyan of Kazakhstan was struggling to find affordable and relevant research through her institution. Fast forward to 2017 and Sci-Hub serves as one of the most common sites that seeks to circumvent paywalls and provide access to scholarly literature.

While 25 percent of scholarly documents on the web are now open access, thanks to the growing movement, Sci-Hub offers access to around 62 million academic articles. Its unconvincing legality has caught the attention of major proponents of publishing, including Elsevier.

Despite the whirl-wind of controversy surrounding the site’s launch, Sci-Hub data was able to answer some important questions: who needs access to research, what do they need access to, and how much do they lack access to?

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A new study describes the mechanics behind an early key step in artificially activating carbon dioxide so that it can rearrange itself to become the liquid fuel ethanol.

Solving this chemical puzzle may one day lead to cleaner air and renewable fuel.

The scientists’ ultimate goal is to convert harmful carbon dioxide (CO2) in the atmosphere into beneficial liquid fuel. Currently, it is possible to make fuels out of CO2—plants do it all the time—but researchers are still trying to crack the problem of artificially producing the fuels at large enough scales to be useful.

Theorists at Caltech used quantum mechanics to predict what was happening at atomic scales, while experimentalists at the Department of Energy’s (DOE) Lawrence Berkeley National Lab (Berkeley Lab) used X-ray studies to analyze the steps of the chemical reaction.

“One of our tasks is to determine the exact sequence of steps for breaking apart water and CO2 into atoms and piecing them back together to form ethanol and oxygen,” says William Goddard professor of chemistry, materials science, and applied physics, who led the Caltech team. “With these new studies, we have better ideas about how to do that.”

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A new biosensor technology, commonly referred to as a “lab on a chip,” could monitor your health and alert you of exposure to bacteria, viruses, and pollutants.

“This is really important in the context of personalized medicine or personalized health monitoring,” says Mehdi Javanmard, co-author of the recently published work on the development. “Our technology enables true labs on chips. We’re talking about platforms the size of a USB flash drive or something that can be integrated onto an Apple Watch, for example, or a Fitbit.”

This from Rutgers University:

The technology, which involves electronically barcoding microparticles, giving them a bar code that identifies them, could be used to test for health and disease indicators, bacteria and viruses, along with air and other contaminants, says Javanmard, senior author of the study.

In recent decades, research on biomarkers—indicators of health and disease such as proteins or DNA molecules—has revealed the complex nature of the molecular mechanisms behind human disease. That has heightened the importance of testing bodily fluids for numerous biomarkers simultaneously, the study says.

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By: Andrew J. Hoffman, University of Michigan

When politicians distort science, academics and scientists tend to watch in shock from the sidelines rather than speak out. But in an age of “fake news” and “alternative facts,” we need to step into the breach and inject scientific literacy into the political discourse.

Nowhere is this obligation more vivid than the debate over climate change. Contrary to the consensus of scientific agencies worldwide, the president has called climate change a “hoax” (though his position may be shifting), while his EPA administrator has denied even the most basic link to carbon dioxide as a cause.

It’s another sign that we, as a society, are drifting away from the use of scientific reasoning to inform public policy. And the outcome is clear: a misinformed voting public and the passage of policies to benefit special interests.

Using data to meet predetermined goals

We saw this dynamic at work when President Trump announced his intention to withdraw from the Paris Agreement on climate change. In making his case, he presented an ominous economic future: “2.7 million lost jobs by 2025,” and industries devastated by 2040: “Paper – down 12 percent. Cement – down 23 percent. Iron and steel – down 38 percent. Coal – and I happen to love the coal miners – down 86 percent. Natural gas – down 31 percent.”

These data were drawn from a study – one study! – funded by the American Council for Capital Formation, a pro-business lobbying group, and conducted by National Economic Research Associates (NERA), a consulting firm for industrial clients often opposed to environmental regulations. The New York Times Editorial Board called the data “nonsense” and “a cornucopia of dystopian, dishonest and discredited data based on numbers from industry-friendly sources.”

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