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Category: energy – Page 65

Portable Power

Many of the strongest limitations on our technology and civilization at this time are from problems moving energy around with us, in a way which is light, energy dense, and cheap. Today we’ll look at some ways we might increase that vastly, and challenges to do that and the impact such dense portable power would have.

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Isaac Arthur.
Mark Warburton.
Stuart Graham.

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Darius Said.
Edward Nardella.
Keith Blockus.
N Kern.

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Edward Nardella.
Jarred Eagley.
Justin Dixon.
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Misho Yordanov.
Pierre Demet.
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Stefan Blandin.

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Luca De Rosa — [email protected].

Deep-ultraviolet laser microscope reveals diamond’s nanoscale transport behaviors

Ultrawide-bandgap semiconductors—such as diamond—are promising for next-generation electronics due to a larger energy gap between the valence and conduction bands, allowing them to handle higher voltages, operate at higher frequencies, and provide greater efficiency compared to traditional materials like silicon.

However, their make it challenging to probe and understand how charge and heat move on nanometer-to-micron scales. Visible light has a very limited ability to probe nanoscale properties, and moreover, it is not absorbed by diamond, so it cannot be used to launch currents or rapid heating.

Now, researchers at JILA, led by JILA Fellows and University of Colorado physics professors Margaret Murnane and Henry Kapteyn, along with graduate students Emma Nelson, Theodore Culman, Brendan McBennett, and former JILA postdoctoral researchers Albert Beardo and Joshua Knobloch, have developed a novel microscope that makes examining these materials possible on an unprecedented scale.

New electromagnetic material draws inspiration from the color-shifting chameleon

The chameleon, a lizard known for its color-changing skin, is the inspiration behind a new electromagnetic material that could someday make vehicles and aircraft “invisible” to radar.

As reported today in the journal Science Advances, a team of UC Berkeley engineers has developed a tunable metamaterial microwave absorber that can switch between absorbing, transmitting or reflecting microwaves on demand by mimicking the chameleon’s color-changing mechanism.

“A key discovery was the ability to achieve both broadband absorption and high transmission in a single structure, offering adaptability in dynamic environments,” said Grace Gu, principal investigator of the study and assistant professor of mechanical engineering. “This flexibility has wide-ranging applications, from to advanced communication systems and energy harvesting.”

Compact comb lights the way for next-gen photonics

In the world of modern optics, frequency combs are invaluable tools. These devices act as rulers for measuring light, enabling breakthroughs in telecommunications, environmental monitoring, and even astrophysics. But building compact and efficient frequency combs has been a challenge—until now.

Electro-optic , introduced in 1993, showed promise in generating optical combs through cascaded phase modulation but progress slowed down because of their high power demands and limited bandwidth.

This led to the field being dominated by femtosecond lasers and Kerr soliton microcombs, which, while effective, require complex tuning and , limiting field-ready use.

Cori Cycle: How Your Body Recycles Energy During Exercise

Dive into the fascinating world of the Cori Cycle, also known as the lactic acid cycle! 🏋️‍♂️💡 In this video, we’ll explore how your body manages energy during intense exercise by recycling lactate from muscles back into glucose in the liver.
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New reactor can make hydrogen fuel from water using sunlight

When burned or used in fuel cells, hydrogen produces nothing but water, making it an ideal candidate for reducing global carbon emissions. Yet, most of the hydrogen produced today comes from fossil fuels, releasing significant amounts of carbon dioxide into the atmosphere. But now, researchers may have found a way to create carbon-free hydrogen.

A group of researchers, led by Professors Takashi Hisatomi and Kazunari Domen, built a 100-square-meter reactor that uses sunlight and photocatalysts to split water into hydrogen and oxygen. This process bypasses traditional photovoltaic-based methods, which convert sunlight into electricity before splitting water.

The new process relies on sheets of a photocatalyst called SrTiO3:Al, which are submerged in water. Sunlight activates the photocatalyst, splitting water into its molecular components. The gases can then be collected for storage and use. Because it utilizes sunlight for power, this method creates clean, carbon-free hydrogen.

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