The Tek Pulse: The latest and greatest engineering and science posts

 

Informative, innovative and interesting articles from our favorite blogs

 

 

  1. Big discoveries about tiny particles, University of Delaware, October 8, 2018, ScienceDaily -- A graduate student in chemical and biomolecular engineering along with a team of scientists have uncovered new insights into polymer nanoparticles. The team used Brillouin light spectroscopy – a technique that spelunks the molecular properties of microscopic nanoparticles by examining how they vibrate. The scientists analyzed the vibration between each nanoparticle to understand how their mechanical properties change at different temperatures. According to the team, it’s important to understand the thermal behavior of nanoparticles to improve the performance of a material. The team verified that there is something on the polymer nanoparticle surface that is more mobile compared to its core. The scientists plan to use this information to build a nanoparticle film that can govern the propagation of sound waves. For the full article check out ScienceDaily.
     
  2. Permanent, wireless self-charging system using NIR band, KAIST, October 8, 2018, PHYS.ORG -- A research team has developed a permanent, wireless, self-charging platform for low-power wearable electronics. The team achieved this by converting near-infrared (NIR) band irradiation to electrical energy.  The team’s technique has more advantages than current solar irradiation platforms because it allows conventional devices to be more comfortable to wear and charges easily in everyday life, using various irradiation sources for constant charging. The proposed platform allows for more flexible designs, which are important for commercialization. The technique also secures higher photostability and efficiency than existing structures. This technology can be applied to flexible, wearable charging systems without needing any attachments. The team believes their new platform can be used in a variety of fields, including mobile devices, IoTs and drones. For the full article visit PHYS.ORG.
     
  3. Forcing a metal to be a superconductor via rapid chilling, Bob Yirka, October 8, 2018, ECN -- Researchers have found a way to force a metal to be a superconductor by cooling it very quickly. Scientists worldwide continue to look for a material that behaves like a superconductor at room temperature. Such a material would be extremely valuable because it would have zero electrical resistance. This means it would not increase in heat as electricity is passed through it, nor would it lose energy. Now, researchers have found a way to get one non-cooperative metal to enter a superconductive state and to stay that way for over a week. The team came up with an idea: if the metal was cooled rapidly, it might not have a chance to enter a competing state. The researchers successfully tested their idea on a metal sample of iridium and tellurium. For the full article visit ECN.
     
  4. Taking lithium-ion batteries to new extremes, Matt Miles, October 8, 2018, ECN -- A new novel invention promises to effectively mitigate the effects of thermal extremes when used with lithium ion batteries (LIBs). LIBs perform best when the temperature range is just right – not too hot or too cold. However, this is a major limiting factor when it comes to using LIBs in electric vehicles in regions where temperatures vary widely. This roadblock is preventing a transition to the wider use of electric vehicles. The researcher’s solution is a fluid-free, passive thermal regulator that stabilizes battery temperature in hot and cold extreme environments. The thermal regulator switches its thermal conductance according to the local battery temperature and delivers the desirable thermal functionality, retaining heat when it’s cold and facilitating cooling when it’s hot. Under experimental conditions ranging from negative four-degrees Fahrenheit to 114 degrees Fahrenheit, the thermal regulator performed well. For the full story visit ECN.
     
  5. And lastly, the most popular Tektronix download of the week goes to – Accurately Measuring High Speed GaN Transistors. Our latest application note shows how to use the Tektronix IsoVu Optically Isolated Probe System to make accurate, repeatable measurements, thanks to high common mode rejection.

Download your copy today!

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