Articles tagged with Copper
A recent study reveals that early hunter-gatherers on opposite sides of North America interacted much sooner than previously believed. Analysis of human remains, stone tools, and a copper band found in an ancient burial pit in Georgia suggests direct trade networks between the Great Lakes region and the coastal southeast United States....
Copper acetate and copper resinate pigments, used in Renaissance-era art, turned brown over time due to molecular changes triggered by light exposure. Boiling linseed oil before mixing slowed the darkening reaction.
Researchers create metal that is 42 percent stronger than previous record while maintaining electrical conductivity. The team's discovery combines nanocrystalline and nanotwinned structures to overcome traditional trade-offs between strength and conductivity.
A team of researchers at the University of Pittsburgh's Swanson School of Engineering has developed a new method to separate ethylene from ethane gas, which is abundant in natural gas. The technique uses isolated copper atoms that olefins like ethylene can bond to strongly, potentially saving energy and reducing costs.
A Tel Aviv University study finds the kingdom of Edom flourished in the Arava Desert during the 12th-11th centuries BCE, with expert analysis revealing a copper 'high-tech network' led by an affluent society. The researchers attribute the sudden improvement in copper production to Pharaoh Shoshenq I's military campaign.
A University of Houston chemist is investigating the role of copper in neurodegenerative diseases like Alzheimer's. The researcher aims to understand how cells regulate copper levels, which are found to be unusually high in people with the disease.
Researchers at Harvard University have discovered the architecture of a copper-nitrenoid complex that can transform carbon-hydrogen bonds into valuable building blocks for chemical synthesis. This breakthrough could lead to more efficient and sustainable production methods for pharmaceuticals, household products, and other chemicals.
Scientists at CNRS have created polymers that can change information stored on a molecular level using specific wavelengths of light. This technology allows for the storage and decoding of secret messages, with potential applications in designing new materials.
Researchers discovered that electrons in copper oxide superconductors continue to pair up even above the critical temperature, reducing the energy gap. This finding constrains theories about high-temperature superconductivity and opens avenues for designing more precise materials.
Researchers from Russia and Japan have developed a new stabilization method for unique 2D copper oxide materials using graphene, allowing them to exhibit stable rectangular atomic structures. This breakthrough has significant implications for the development of spintronics devices, as these materials show promise in this field.
A novel catalysis system reduces carbon dioxide to methane in a single step, eliminating intermediate steps. The system uses copper and nanostructured silver surfaces, yielding higher methane concentrations than copper-only systems.
The study reveals a crucial dependency on British and continental European trading sources for Scandinavian mixed-metal artifacts during the Nordic Bronze Age. Metal recycling was common, with smiths reusing imported and local metal objects to create new products.
Researchers have discovered a new strategy to extend sodium ion battery cyclability using copper sulfide as the electrode material. This leads to high-performance conversion reactions and is expected to improve the commercialization of sodium ion batteries.
Researchers at IBS have successfully fabricated a single layer graphene film on large area copper foils with no adlayers, achieving adlayer-free and single crystal graphene. This breakthrough enables the creation of high-performance devices with consistent uniformity in the number of layers over large areas.
Researchers at Oregon State University have discovered a copper compound that improves the condition of mice with damaged motor neurons, potentially slowing ALS progression. The study builds on previous findings and suggests a broader neuroprotective role for copper-ATSM beyond mutant SOD models of ALS.
A study by archaeologists at the University of Helsinki reveals that copper in ancient Finnish jewellery originated from southern Europe, particularly Greece and Bulgaria. The findings demonstrate extensive exchange networks between continental Europe and Finland across the Baltic Sea.
Researchers at Rice University have developed flexible nanotube film antennas that match the efficiency of copper, but with improved flexibility and thinner dimensions. The new material could enable lighter, stronger, and more resistant antennas for various applications including 5G networks and aerospace.
Researchers have discovered the operation of a nanocatalyst at the atomic level, revealing its mechanism in modifying carbon-oxygen bonds. The study demonstrates the potential of developing effective and inexpensive copper-based catalysts for hydrogenation reactions.
Researchers report a unique copper oxide exhibiting high-temperature superconductivity at up to 73 K, distinct structural features from known cuprate superconductors. This discovery suggests new directions for developing high-temperature superconductors.
Researchers at the University of California, Davis have discovered that metals can subtly affect the structure of C-peptide, a hormone involved in insulin production. The study found that certain metals, such as copper and chromium, prevent cells from taking up C-peptide, while others like zinc do not.
Researchers have identified the main mechanism of photovoltage losses in copper oxide photocathodes as binding to defect states within the band gap, not at interfaces with a catalyst layer. This discovery is crucial for optimizing solar-to-hydrogen energy conversion efficiency.
Researchers at Northwestern University have identified the enzyme responsible for methane-methanol conversion, which catalyzes the reaction at a single copper ion site. This discovery could lead to the development of new, human-made catalysts that convert methane to methanol with high efficiency.
Researchers have found microorganisms in toxic sites like the Berkeley Pit, which produce potent molecules with potential human medicine uses. These molecules show anti-cancer and antibiotic activities, offering new hope for treating diseases such as cancer and antibiotic-resistant infections.
Graphene decoupling with potassium bromide leads to improved electrical properties, closing the gap to pure graphene. This method reduces damage and contamination during transfer, enabling defect-free production.
Researchers at HZDR modify magnetic behavior of exotic materials Cs2CuCl4 using high pressures, revealing unusual magnetic properties and potential applications in quantum computing. The study contributes to the understanding of geometrically frustrated crystals.
Researchers have developed an enzyme-like heterogeneous TiO2 photocatalyst with high catalytic activity for hydrogen production. The catalyst's unique enzymatic characteristics enable it to efficiently convert light energy into H2, rivaling the performance of expensive Pt-TiO2 photocatalysts.
Scientists have developed a model for predicting nanocrystal shapes when sandwiched between graphene layers. The research uses scanning tunneling microscopy and theoretical modeling to explain the data, showing that the top layer of graphene resists upward pressure from growing metal islands, flattening them.
Researchers at Tohoku University have developed a technique to transform copper into a material that mimics properties of gold and silver. The new medium, made of copper nanoparticles, has applications in the production of electronic devices and is suitable for environmentally friendly printing technologies.
University of Arizona immunobiologist Michael Johnson is using a $1.9 million grant to explore copper's potential as an antibiotic. He hopes to create therapeutics that target the copper-sensing protein CopY, which helps bacteria fight off copper stress.
Scientists from the University of Tsukuba have isolated bacteria that break down cyclic imines, a key component in medicines for hypertension. The discovery highlights copper amine oxidase as the enzyme responsible for this process.
Researchers have identified a matrix of 12 risk categories that consider environmental, social, governance and mineralogical factors affecting the viability and accessibility of complex copper orebodies. The study found that 75% of undeveloped copper orebodies face environmental, social and governance challenges.
Researchers at Kanazawa University have developed a new copper catalyst that can distinguish between two different carbonyl compounds and selectively synthesize one species of 1,2-diol. The catalyst uses a N-heterocyclic carbene ligand to activate the carbonyls and form a carbon-carbon bond.
Scientists have created a 3D printable sensor that can detect tiny amounts of water, changing color from purple to blue in wet conditions. The sensor is made of a cheap, flexible, and non-toxic copper-based compound that can be printed into various shapes.
Researchers at Chinese Academy of Sciences Headquarters identified the atomic structure of the catalytically active copper-ceria interface, proposing a copper bilayer model. The copper-ceria interface was found to be responsible for efficient hydrogen production through low-temperature water-gas shift reactions and CO/CO2 hydrogenation.
A new copper-based OLED screen technology has been developed by USC scientists, offering a cheaper alternative to current iridium-based screens. The copper complex outperforms prior attempts and demonstrates efficient light emission across various colors, including blue.
Researchers at Toyohashi University of Technology demonstrate stop bands in forward volume spin waves, a breakthrough for next-gen spin wave ICs. By combining magnetic insulators with metals, they suppress noise and express fundamental spin wave phenomena.
A recent study by Fernando Tornos and colleagues reveals that microbes play a key role in the precipitation of metals in shallow environments. The researchers found evidence of anaerobic microbes controlling the formation of copper sulfides in the Las Cruces deposit, a high-grade copper ore site.
Researchers have successfully functionalized carboranes using copper catalysis, affording unprecedented C,B-substituted derivatives. The discovery expands the realm of base metal catalyzed transformations and paves the way for novel applications in boron chemistry.
A marine bacterium has discovered a novel ferritin mechanism to control toxic metals, producing an enhanced ability to detoxify reactive oxygen species. This process is unique among known ferritins and holds promise for future engineered biocatalysts in drug development.
Researchers at Lawrence Berkeley National Laboratory have discovered a copper catalyst that can efficiently convert carbon dioxide into valuable chemicals and fuels without wasteful byproducts. This breakthrough could enable the production of renewable fuels, reducing dependence on fossil fuels and lowering greenhouse gas emissions.
Researchers at Friedrich Schiller University Jena have synthesized a molecule that can perform the function of a computing unit in a quantum computer. The molecule, a trinuclear copper complex, meets the condition of having a sufficiently long-lived spin state to be used as a qubit.
Physicists from Brookhaven National Laboratory and Yale University have synthesized large-area single-crystal domains of borophene on copper substrates, expanding its potential for fabricating high-performance devices. The discovery represents a significant step towards practical borophene-based electronics.
A new study by UMD researchers found that saltier waterways are creating 'chemical cocktails' that release toxic metals and pollutants from streambeds. These cocktails can have devastating effects on drinking water supplies and ecosystems, similar to the 2014 Flint water crisis.
Researchers at UTA have filed a patent application for a new copper compound that can efficiently separate ethylene from ethane, reducing energy consumption and capital investment. This technology has the potential to significantly reduce environmental impact and lower costs associated with producing plastics.
Varying nanotwin spacing produces dramatic improvements in metal strength and work hardening rates. Researchers created composites with different nanotwin boundary spacings, resulting in stronger materials than their constituent components.
A research group at IBS invents contact-free annealing technique to convert polycrystalline metal foils into single crystals with superior properties. They successfully produced large single crystal metals up to 32 cm2, including copper, nickel, cobalt, platinum, and palladium.
Scientists at Swansea University's Energy Safety Research Institute are working on a £20,000 Royal Society Research Grant to create ultra-conductive wires that can transport electricity with improved energy efficiency. By mixing copper with carbon nanotubes, they aim to reduce the 10% of electricity lost in the grid.
Researchers at Johns Hopkins Medicine discovered that low copper levels in cells make fat cells fatter by altering how they process fuels like fat and sugar. The study adds evidence that copper homeostasis could be a therapeutic target for metabolic disorders, including obesity.
Researchers at Harvard John A. Paulson School of Engineering and Applied Sciences found that a strong chemical bond between the apical cation and oxygen in cuprate compounds impacts superconductivity temperature. This discovery sheds light on key component of complicated phenomena in cuprates, opening up new avenue for materials design.
Researchers studied copper-based superionic crystal CuCrSe2, revealing copper ions flow like liquids above a certain temperature. This discovery could lead to the development of more efficient and safer rechargeable batteries by replacing liquid electrolytes with solid superionic materials.
Researchers have developed a new antibiotic that can target Mycobacterium tuberculosis bacteria hiding in macrophage immune cells. The peptide-based drug kills the bacteria by weaponizing copper ions, which are toxic to them.
Researchers at the Technical University of Munich have created a heterometallic copper-aluminum superatom that exhibits atomic properties. The discovery paves the way for the development of new, cost-effective catalysts for various chemical processes.
Researchers developed a novel sucking-flow liquid removal mechanism to promote both surface refreshing and droplet growth on a hierarchical mesh-covered surface, enhancing condensation heat transfer performance. This breakthrough addresses the long-standing challenge in pushing micro/nanostructured materials into practical applications.
Researchers have developed a more efficient method for laying down thin-film circuitry using copper nanoparticle ink with green laser light. The study found that optimal settings for laser power and scanning speed can enhance conductivity, while sintering reduces film thickness by up to 74%.
Scientists at KIT discovered a sharp line at a depth of 150-200 nm where wear particles are detached, contributing to the later weakness in the material. This finding contributes to understanding processes on the molecular level during friction and may lead to developing materials with better friction properties.
A comprehensive analysis found associations between exposure to toxic metals and increased risk of cardiovascular disease and coronary heart disease. The study's authors call for attention to metals as a significant source of cardiovascular risk, highlighting the need for population-wide strategies to minimize exposure.
A comprehensive analysis of the evidence found exposure to toxic metals like arsenic, lead, copper, and cadmium to be associated with an increased risk of cardiovascular disease. The study suggests that these metals may be an independent risk factor for cardiovascular disease, even at relatively low levels of exposure.
Researchers developed a new model explaining the interactions between small copper clusters and water molecules in producing molecular hydrogen. The study shows that copper-water complexes synthesized in ultra-cold helium nanodroplets can catalyze hydrogen production.
Researchers analyzed copper-based artifacts to understand provenance and production of Egyptian metal objects, finding signs of localized ore sources and diverse metal origins. The findings offer new insights into ancient Egyptian metallurgy and supply networks, highlighting the importance of ongoing research.
A copper band discovered in coastal Georgia indicates that ancient Native Americans had a more extensive trade network than previously thought. The band was manufactured in the Great Lakes region and shows that the practice of cremation was used across a wider area than previously known, suggesting shared cultural values.