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The big picture.......Rice University researchers have discovered copper boride, a groundbreaking two-dimensional material that opens exciting possibilities for electrochemical energy storage and electronics. This thin, flat material challenges previous scientific predictions by showing that when boron combines with copper, it forms a well-defined 2D structure with unique properties. Scientists used advanced techniques like atomic-resolution scanning tunneling microscopy to identify its distinct zigzag superstructure and electronic signatures. The discovery represents a significant advancement in materials science that could lead to more efficient energy storage technologies and applications in quantum information processing.
Why is this good news......This discovery breaks new ground in materials science by creating a novel material with properties that can significantly improve energy storage systems. Copper boride’s strong covalent bonding and unique electronic profiles offer superior performance potential compared to existing materials. It may enable the development of more efficient batteries and supercapacitors, addressing growing energy storage challenges. The research also paves the way for discovering other 2D metal borides with diverse applications in catalysis and electronics. This represents a potential leap forward in our ability to create customized materials at the atomic level for specific technological needs
The Unexpected Formation of Copper Boride.......For over a decade, scientists have speculated about the potential of boron when combined with metals like copper. Initial theories suggested that boron atoms would bond too tightly to copper, preventing the formation of borophene, a highly sought-after 2D material. Recent research, however, has revealed that while boron indeed forms a strong bond with copper, it results in the creation of a distinct compound: copper boride. Unlike other systems such as graphene on copper, where atoms diffuse without forming an alloy, the boron atoms in this case form a well-defined 2D structure. This discovery marks a significant advancement in the study of 2D materials, setting the stage for further exploration and potential industrial applications. The implications of this finding are profound. It not only validates earlier predictions by scientists at Rice University, such as Professor Boris Yakobson, but also expands the possibilities for developing new materials with unique properties. The formation of copper boride challenges existing understanding and encourages researchers to delve deeper into the untapped potential of 2D materials.
Exploring the Properties of 2D Boron Nanomaterials.....The study, published in Science Advances, highlights the significant interest in 2D boron nanomaterials due to their polymorphic diversity and potential for quantum phenomena. Using advanced techniques like atomic-resolution scanning tunneling microscopy (STM) and field-emission resonance (FER) spectroscopy, researchers have been able to elucidate the structure and properties of these atomically thin boron phases on copper. The findings suggest a strong covalent bonding that differentiates copper boride from other borophene phases observed on metals like silver. Past research had synthesized borophene on metals such as silver and gold, but copper presented a unique challenge. Some studies proposed that boron might form polymorphic borophene on copper, while others suggested phase separation into borides or even crystal nucleation. The recent detailed investigation combining high-resolution imaging, spectroscopy, and theoretical modeling has provided clarity. The periodic zigzag superstructure and distinct electronic signatures observed are markedly different from known borophene phases, reinforcing the uniqueness of copper boride.
Implications for Electrochemical Energy Storage and Beyond......The discovery of copper boride’s unique properties holds significant promise for various applications, particularly in electrochemical energy storage and electronics......read on https://www.sustainability-
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The rocket took off from ESA's Kourou station in French Guiana and flying over the Amazon, one of the rainforests it will study.The satellite on board has been affectionately named "space brolly" for its giant 12m diameter antenna which will send out signals. "We really want to interrogate these forests. We can actually look inside," Prof John Remedios, director of The National Centre for Earth Observation, which proposed the idea to ESA, said after the launch. He said that it would be a major achievement "to actually know for the first time with high accuracy how much is actually in the Amazon, Congo, Indonesia". The antenna is using P-band radar which has a very long wavelength - allowing it to see deeper inside forests and reveal branches and trunks obscure d by the canopy."Most radars that we have in space today take wonderful images of icebergs, but when they look at forests they see the tops of the forest, the little twigs, the little leaves, they don't penetrate down into the forests," explained Dr Ralph Cordey, head of geosciences at Airbus.
"But what we found was that by using a much longer radar wavelength, we could see down into the depths of trees and forests," he said. The 1.2-tonne satellite will use an approach not dissimilar to that used in a CT scan, and analyse slices through the trees on repeat passes to build up a picture of how much woody material is present. It is this material that can be used as a proxy for the amount of planet-warming carbon dioxide stored. Currently scientists have been measuring individual trees and trying to extrapolate, but this presents a "huge challenge" said Prof Mat Disney, professor of remote sensing, at University College London. https://www.bbc.com/news/
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Adding Layers to Keep Cool......The researchers’ heat pump uses electrocaloric cooling, a phenomenon where certain materials temporarily change temperature in response to an electric field. Electrocaloric materials on their own, however, won’t produce a cooling effect that is large enough. They need to be paired with a transfer mechanism that continually moves heat. Rather than depending on a separate pump or actuator, which would add bulk and consume more energy, the researchers designed an elegant solution based on stacked layers of electrocaloric materials. The layers serve as a heat pump, moving warmth from the layer closest to the heat source away to the outermost layer. Kaur began exploring localized cooling technologies as part of a Berkeley Lab Laboratory Directed Research and Development (LDRD) award. One goal of the project, which began in 2022, was to optimize electrocaloric materials and enable their use in a wearable cooling device such as clothing or a blanket. An expert on thermal energy storage, Kaur teamed with principal investigator Qibing Pei, a professor of materials science and engineering at the UCLA Samueli School of Engineering, to explore the cooling potential of an electrocaloric material called poly (vinylidene fluoride-trifluoroethylene-
Liquid-Free Cooling.....Unlike most air conditioning units, the electrocaloric system does not rely on refrigerants or water. Using this kind of hyperlocal cooling can also save energy and reduce stress on the grid by keeping people cool while allowing for higher thermostat settings in buildings.......read on https://newscenter.lbl.gov/
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Researchers working on the project found that an eight by five centimetre plate of zirconium oxide can generate 0.9 V in laboratory conditions of 50% humidity. For scale, this is roughly the amount of electricity produced by half an AA battery. It is important to note, however, that the project is still in its infancy. Scientists are working on making the process more efficient. Current speculations expect hygroelectricity to be able to produce the same amount of electricity as a photovoltaic cell of the same size in the future.
How is it possible to create electricity from thin air?......It seems that the answer to this over-a-century-old question is the zirconium oxide. To create these cells, small, uniform nanoparticles of zirconium oxide are compressed into a sheet of material that has a uniform structure throughout, and a collection of channels or capillaries. This nanostructure produces electrical fields within the capillaries. These electrical fields separate charge from the water molecules in the atmosphere. This produces a cascade of physiochemical, physical and electrophysical processes that work to capture electrical energy. While this complex process does not quite produce electricity from thin air, it comes pretty close. Important to note, however, is that hygroelectricity requires atmospheric humidity to function. In areas where humidity is low, like very cold regions, the system will not produce electricity.
What does the future of hygroelectricity look like?......Hygroelectricity, though a relatively new entrant to the renewable sphere, has the potential to provide renewable solutions to regions where other sources of renewable energy are not possible – like areas with little direct sunlight but plenty of rainfall. New renewables (like this infinite, invisible power source) continue to emerge, disrupting the renewable industry for the better. https://www.ecoticias.
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