Objects with “negative mass” react to the application of force in exactly the opposite way from what you would expect.

Researchers have created particles with negative mass in an atomically thin semiconductor, by causing it to interact with confined light in an optical microcavity.

This alone is “interesting and exciting from a physics perspective,” says Nick Vamivakas, an associate professor of quantum optics and quantum physics at the University of Rochester’s Institute of Optics. “But it also turns out the device we’ve created presents a way to generate laser light with an incrementally small amount of power.”

The device, described in Nature Physics, consists of two mirrors that create an optical microcavity, which confines light at different colors of the spectrum depending on the spacing of the mirrors.

Researchers in Vamivakas’ lab, including co-lead authors Sajal Dhara (now with the Indian Institute of Technology) and PhD student Chitraleema Chakraborty, embedded an atomically thin molybdenum diselenide semiconductor in the microcavity.

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By: Richard Gunderman, Indiana University

Match the following figures – Albert Einstein, Thomas Edison, Guglielmo Marconi, Alfred Nobel and Nikola Tesla – with these biographical facts:

1. Spoke eight languages

2. Produced the first motor that ran on AC current

3. Developed the underlying technology for wireless communication over long distances

4. Held approximately 300 patents

5. Claimed to have developed a “superweapon” that would end all war

The match for each, of course, is Tesla. Surprised? Most people have heard his name, but few know much about his place in modern science and technology.

The 75th anniversary of Tesla’s death on Jan. 7 provides a timely opportunity to review the life of a man who came from nowhere yet became world famous; claimed to be devoted solely to discovery but relished the role of a showman; attracted the attention of many women but never married; and generated ideas that transformed daily life and created multiple fortunes but died nearly penniless.

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Sensors on tape that attach to plants yield new kinds of data about water use for researchers and farmers.

“With a tool like this, we can begin to breed plants that are more efficient in using water,” says Patrick Schnable, plant scientist at Iowa State University. “That’s exciting. We couldn’t do this before. But, once we can measure something, we can begin to understand it.”

The tool making these water measurements possible is a tiny graphene sensor that can be taped to plants—researchers call it a “plant tattoo sensor.” Graphene is an atom-thick carbon honeycomb. It’s great at conducting electricity and heat, and is strong and stable. The graphene-on-tape technology in this study has also gone into wearable strain and pressure sensors, including sensors for a “smart glove” that measures hand movements.

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Alyssa Doyle, ECS membership intern

My name is Alyssa Doyle, and I had the privilege of interning with The Electrochemical Society’s Membership Services Department for a semester. When I first began my internship in August of 2017, I wasn’t sure exactly what to expect. I wasn’t all that familiar with nonprofit operations, and as a junior English major at The College of New Jersey, I knew practically nothing about electrochemistry. I’m going to be honest—I was quite nervous, but I was also incredibly excited by the prospect of acquiring knowledge about an entirely new subject.

From the moment I arrived, I was quickly immersed in ECS’s mission and culture. I learned a lot about ECS’s Free the Science campaign, and as a student who is interested in publishing, I was intrigued by the possibility of open access. When I first heard about the initiative, I deeply admired ECS for their desire to provide free research to people across the world with the hopes of increasing the sustainability of the planet—I still do, but now even more so.

Throughout my internship, I worked on various rewarding, engaging, and meaningful projects—there’s no getting coffee here. Instead, I had the chance to write blog posts about award winners and upcoming ECS meetings and events, and I was able to participate in the preparation for the 232nd ECS Meeting in National Harbor by completing mini projects, such as creating volunteer schedules, confirming registrants, and writing bios for speakers. I also had the opportunity to work on longer projects as well by maintaining contact with ECS’s 67 student chapters and creating a list of prospective employers to reach out to about ECS’s Career Expo. Even within the last week at my internship, I put together a timeline of the Edward Acheson Award and had the chance to read through Transactions of the American Electrochemical Society from 1903 onward. Each project was incredibly fascinating, and I started each day ready to tackle a new task.

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This article was originally published in the winter 2017 issue of Interface.

Tech Highlights was prepared by David Enos and Mike Kelly of Sandia National Laboratories, Colm Glynn and David McNulty of University College Cork, Ireland, Zenghe Liu of Verily Life Science, and Donald Pile of Rolled-Ribbon Battery Company. Each article highlighted here is available free online.

Mechanical Pre-Lithiation of Silicon Anodes for Lithium Ion Batteries

Low Initial Coulombic Efficiency (ICE) continues to be a significant issue for the practical use of alloying materials, such as Si and Ge, as anodes and particularly for their implementation in full Li-ion cells. It is imperative to develop methods to improve ICE to mitigate issues associated with the consumption of electrolyte and the loss of Li during initial cycling. Several methods
to improve ICE have been examined, including studying the effects of active material particle size and the use of various electrolyte additives such as vinylene carbonate. The prelithiation of anode materials has also been investigated using two different approaches—electrochemical and mechanical prelithiation. Researchers from the University of Tottori have reported on the formation of a crystalline Li-Si alloy phase via a mechanical alloying (MA) method. Read the full article.

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By: Jalees Rehman, University of Illinois at Chicago

In a recent survey of over 1,500 scientists, more than 70 percent of them reported having been unable to reproduce other scientists’ findings at least once. Roughly half of the surveyed scientists ran into problems trying to reproduce their own results. No wonder people are talking about a “reproducibility crisis” in scientific research – an epidemic of studies that don’t hold up when run a second time.

Reproducibility of findings is a core foundation of science. If scientific results only hold true in some labs but not in others, then how can researchers feel confident about their discoveries? How can society put evidence-based policies into place if the evidence is unreliable?

Recognition of this “crisis” has prompted calls for reform. Researchers are feeling their way, experimenting with different practices meant to help distinguish solid science from irreproducible results. Some people are even starting to reevaluate how choices are made about what research actually gets tackled. Breaking innovative new ground is flashier than revisiting already published research. Does prioritizing novelty naturally lead to this point?

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By: Jack Barkenbus, Vanderbilt University

Every day about 100 people die in car crashes on U.S. roads. That death toll is a major reason why both Congress and the Trump administration are backing automotive efforts to develop and deploy self-driving cars as quickly as possible.

However, officials’ eagerness far exceeds the degree to which the public views this as a serious concern, and overestimates the public’s willingness to see its driving patterns radically altered. As those of us involved in studies of technology and society have come to understand, foisting a technical fix on a skeptical public can lead to a backlash that sets back the cause indefinitely. The backlash over nuclear power and genetically modified organisms are exemplary of the problems that arise from rushing technology in the face of public fears. Public safety on the roads is too important to chance consumer backlash.

I recommend industry, government and consumers take a more measured and incremental approach to full autonomy. Initially emphasizing technologies that can assist human drivers – rather than the abilities of cars to drive themselves – will somewhat delay the day all those lives are saved on U.S. roads. But it will start saving some lives right away, and is more likely to avoid mass rejection of the new technology.

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Don’t discount the honorable mention!

Each year, the ECS San Francisco Section recognizes a deserving undergraduate student from a college or university in Northern California though the San Francisco Section Daniel Cubicciotti Student Award. The award was established in 1994 to assist a deserving student to pursue a career in the physical sciences or engineering. The award was created to honor Daniel Cubicciotti, a distinguished researcher in his own right. Recipients receive an etched metal plaque and $2,000 prize. In addition, the San Francisco section recognizes up to two additional students with an honorable mention: a framed scroll and a $500 prize.

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Over 1,840 articles were published in ECS journals in 2017, ranging from battery technology to materials science. Among those articles, “The Development and Future of Lithium Ion Batteries” by ECS member of 48 years, George E. Blomgren, stood out as the most downloaded paper of the year, with over 25,000 downloads in total.

The open access paper was published in the Journal of The Electrochemical Society (JES) and has held the number one top download spot for the majority of the year. In November 2017 alone, it hit a record-setting 4,080 downloads. Blomgren credited the paper’s outstanding success to the continued surging interest in lithium-ion batteries, a technology that has made its profound mark on consumer electronics such as cellphones and computers, and continues to be applied to emerging innovations ranging from large scale energy storage to electric vehicles.

The paper, which highlights the past, present, and future of battery science and technology, was published as part of the JES Focus Issue of Selected Papers from IMLB 2016 with Invited Papers Celebrating 25 Years of Lithium Ion Batteries. The focus issue contains contributions from veteran scientists considered by many to be founding fathers in lithium battery science, including Emanuel Peled, Tetsuya Osaka, Zempachi Ogumi, Jeff Dahn, Robert Huggins, and of course, Blomgren.

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The Glenn E. Stoner Collection, which contains 17 articles Stoner published in the Journal of The Electrochemical Society, is available to read for free in the ECS Digital Library.

This sponsored collection was generously supported by Stoner’s former students, friends, and colleagues to honor the significant contributions that he made to electrochemistry and teaching.

Original plans for the collection arose during a conversation between Pat Moran, professor at the U.S. Naval Academy and member of the Free the Science Advisory Board, and E. J. Taylor, ECS treasurer and cochair of the Free the Science Advisory Board.

While the two were discussing the importance of the Free the Science initiative to the future of ECS, Moran proposed that they establish a collection in honor of their graduate advisor, Glenn E. Stoner.

A cohort of former classmates from the University of Virginia, including Paul Natishan and UVA professor Rob Kelly, took things from there, reaching out to friends, colleagues, and companies influenced by Stoner’s teaching and work.

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