Donna Blackmond, Ph.D., a renowned Scripps Research professor who has expanded the world s understanding of the chemistry of life, has been elected to the National Academy of Sciences in recognition of her distinguished and continuing achievements in original research.
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VIDEO: This video shows the flexible TEG wristband converts heat emitted by skin into electric power and light up an LED. view more
Credit: Yijie Liu
Scientists in China have developed a small, flexible device that can convert heat emitted from human skin to electrical power. In their research, presented April 29 in the journal
Cell Reports Physical Science, the team showed that the device could power an LED light in real time when worn on a wristband. The findings suggest that body temperature could someday power wearable electronics such as fitness trackers.
The device is a thermoelectric generator (TEG) that uses temperature gradients to generate power. In this design, researchers use the difference between the warmer body temperature and the relatively cooler ambient environment to generate power.
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IMAGE: Researchers have now described a new law of physics that accounts for elastohydrodynamic lubrication (EHL) friction, which should advance a wide range of robotic technologies. EHL friction occurs when two. view more
Credit: Lilian Hsiao
Although robotic devices are used in everything from assembly lines to medicine, engineers have a hard time accounting for the friction that occurs when those robots grip objects - particularly in wet environments. Researchers have now discovered a new law of physics that accounts for this type of friction, which should advance a wide range of robotic technologies. Our work here opens the door to creating more reliable and functional haptic and robotic devices in applications such as telesurgery and manufacturing, says Lilian Hsiao, an assistant professor of chemical and biomolecular engineering at North Carolina State University and corresponding author of a paper on the work.
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VIDEO: During the subsequent 1st stripping process (Movie S1), the whole outline of Li deposition is almost constant with the morphology after 1st plating. view more
Credit: Journal of Energy Chemistry
The target of carbon-neutral and net-zero emissions is the development and utilization of renewable energy. High-energy-density energy storage systems are critical technologies for the integration of renewable energy.
Li metal is highly recognized as a promising alternative anode for next-generation rechargeable batteries due to its high theoretical capacity of 3860 mAh g-
1 and ultralow electrode potential of -3.04 V compared to the standard hydrogen electrode.
However, Li metal batteries (LMBs) main issue is their low Coulombic efficiency (CE), which limits batteries cycle life. The low CE in LMBs occurs because active Li turns into inactive Li, comprising Li components in the solid-electrolyte interphase (SEI) and SEI-wrapped metallic Li (dead Li