Articles tagged with Gold
Researchers at Tohoku University have discovered that gold can be magnetized by applying heat. The non-equilibrium anomalous Hall effect (nAHE) was observed in the gold film due to the heat flow, indicating the evolution of magnetization. This discovery has potential applications in thermoelectric devices and spintronics.
Whitlow Au, a renowned expert in dolphin biosonar, receives the prestigious Gold Medal from the Acoustical Society of America. His research has focused on understanding why dolphin biosonar is superior to man-made sonar.
A team of Korean researchers has successfully developed a way to fabricate an ultralight, high-density nanoporous gold material, known as Black Gold. This new material is twice as solid and 30% lighter than standard gold, with a wider surface area due to its unique nanostructure.
Researchers from MIPT have experimentally demonstrated that copper nanophotonic components can operate successfully in photonic devices, outperforming gold-based components. The discovery enables the development of energy-efficient light sources, ultra-sensitive sensors, and high-performance optoelectronic processors.
A gold sensor developed by a Nebraska researcher uses DNA to detect gold and other metals in water samples. The sensor has potential applications for monitoring household water supplies for lead, mercury, arsenic, and other contaminants.
A new hybrid filter membrane has been developed to remove heavy metals from water, including industrially relevant elements like lead and mercury. The membrane's efficiency is high, with over 99% of toxic substances bound in just a single pass.
Scientists at ETH Zurich have produced a new kind of foam out of gold, making it the lightest gold nugget ever created. The aerogel has a metallic shine and is soft and malleable to the touch.
Researchers at Stanford University have developed a novel way to make metal contacts on solar cells nearly invisible to incoming light. This breakthrough uses nanotechnology to create silicon nanopillars that redirect sunlight, increasing the cell's efficiency and reducing reflection loss.
Researchers at the University of York have developed a self-assembling gel that can selectively extract precious metals like silver and gold from electronic waste. The gel is then converted into conducting nanoparticles, enhancing its electrical conductance and making it suitable for various high-tech applications.
A University of Cincinnati-led team uncovered a rare, intact Bronze Age warrior's tomb dating back to around 1500 B.C., filled with gold cups, jewelry, and bronze weaponry. The find is significant as it may have belonged to a powerful figure who helped shape the Mycenaean culture.
Researchers developed a rotaxane gold catalyst with enhanced properties, which can be controlled by adding acid or metal ion cofactors. The catalyst's shape changes with different ions, leading to varied reaction products and suggesting a potential method for tailoring catalysts.
Researchers have developed a new stretchable, transparent conductor that can withstand over 10,000 strain cycles without showing signs of fatigue. The material, made by pairing gold nanomesh with a stretchable substrate, has potential applications in foldable electronics and implantable medical devices.
Researchers identify two gold belts in the NCC, with gold mineralization linked to mantle-derived melts and fluids. The discovery of decratonic gold deposits has significant implications for understanding gold formation and exploring new large gold concentrations.
Gold compounds demonstrate novel reactivity, competing with traditional catalysts. Acetic acid serves as a proton shuttle, transferring hydrogen atoms between reaction centers.
A new study from Arizona State University has revealed the causes of stress-corrosion cracking in metal alloys, leading to a deeper understanding of how to design crack-resistant materials. The research team's findings suggest that certain metals can fracture at high speeds, threatening the mechanical integrity of critical infrastructure.
A new review by the International Osteoporosis Foundation confirms the success of the Capture the Fracture Best Practice Framework as a single set of quality standards for Fracture Liaison Services globally. The framework helps raise standards, reinforces international guidelines, and identifies common challenges faced by FLS worldwide.
Researchers at Tufts University have observed individual atoms of iodine-125 decay and transform into tellurium-125 using a scanning tunneling microscope. The gold-bonded isotopes emit six times more low-energy electrons, which could destroy tumor DNA without affecting healthy tissue.
Archaeologists have found evidence of a prehistoric gold trade route between the south-west of the UK and Ireland dating back to the early Bronze Age. The study reveals that gold was imported from Cornwall rather than produced locally, suggesting that it was traded for other valuable goods.
Gold nanoclusters of 102 and 144 atoms show distinct behavior, with smaller clusters acting like giant molecules and larger ones exhibiting metallic properties. These findings have significant implications for developing bioimaging and sensing technologies based on metal-like clusters.
The gold deposits in the Witwatersrand Basin are thought to have formed through a process involving volcanic rain, anoxic rivers, and ancient life forms. This theory reconciles previous debates between placer gold and hydrothermal hypothesis theories.
Researchers have found hazardous levels of mercury hundreds of miles downstream from Peruvian gold mines, contaminating local soil, sediment, and water resources. The study highlights the widespread impact of artisanal small-scale gold mining on human health and the environment.
Computational modeling allows researchers to design efficient and affordable catalysts from gold, reducing the need for large amounts of expensive precious metals. The method has potential impact on energy-and-environment related fields, such as automotive exhaust and hydrogen production.
Researchers at TU Darmstadt develop a green method to produce gold nanotubes, suitable for building sensors to measure hydrogen peroxide, with potential applications in medical research and diagnosis. The production process is energy-efficient and uses non-toxic chemicals.
Researchers at Tufts University have developed new single-atom gold catalysts that demonstrate comparable activity and stability as traditional precious metal nanoparticles. These catalysts show promise for producing high-grade hydrogen for cleaner energy use in fuel-cell powered devices.
A research team at AIMR has developed a new bottom-up fabrication method that produces defect-free graphene nanoribbons with periodic zigzag-edge regions. The method controls GNR growth direction and length distribution, enabling the potential for self-assembling single graphene devices at desired locations.
Rice University researchers have successfully developed palladium-gold nanocatalysts that convert glycerol, a waste byproduct of biodiesel production, into valuable chemicals. The catalysts produce a 'Goldilocks' effect, striking the perfect balance between palladium and gold to achieve faster conversion rates.
Researchers at Rice University have discovered aluminum's valuable plasmonic properties, which make it suitable for harvesting solar energy and creating large-area optical devices. The study also found that aluminum exhibits quantum mechanical effects stronger than gold in certain nanomatryushka structures.
A UT Arlington professor will use a $450,000 NSF grant to study the interaction between metals and organic compounds, aiming to create more energy-efficient and sustainable chemical reactions. The research may lead to new technologies for producing valuable industrial chemicals such as ethylene oxide and alcohols.
Scientists from CSIRO discovered that eucalyptus trees can act as a hydraulic pump, drawing up water containing gold particles from the earth and depositing them into their leaves and branches. This innovative technique could provide a cost-effective and environmentally friendly way to search for minerals such as zinc and copper.
Researchers at Kansas State University have discovered a new three-atom-thick material, molybdenum disulfide, and found that manipulating it with gold atoms improves its electrical characteristics. This breakthrough could lead to advancements in transistors, photodetectors, sensors, and thermally conductive coatings.
A new gamma-activation analysis (GAA) technique can detect gold more accurately and quickly than traditional methods, allowing mining companies to recover small traces of gold worth millions of dollars. This could save the Australian mining industry hundreds of millions of dollars each year.
Researchers discovered that ancient artists and craftsmen developed sophisticated thin-film coating techniques, including using mercury as a glue, to apply uniform films of gold and silver. These techniques have not been surpassed in quality since ancient times, making them invaluable for preserving priceless artifacts.
Researchers at the University of Delaware have developed an inexpensive catalyst that converts carbon dioxide into synthetic fuels for powering cars, homes, and businesses. The catalyst uses solar energy to convert CO2 into carbon monoxide, a valuable commodity chemical with many industrial applications.
Northwestern University researchers have discovered a new method for extracting gold that uses cornstarch instead of cyanide, leaving behind other metals. The process is environmentally benign and more efficient than current commercial methods.
Researchers at Ruhr-University Bochum discovered how tiny gold particles selectively transform methanol into formaldehyde, a crucial step in producing everyday plastics. The catalyst produces only water as a byproduct, making it an environmentally friendly alternative.
Researchers at the University of Jyväskylä Nanoscience Center used computational modeling to understand how redox chemistry affects the binding of gold particles on modified calcium oxide surfaces. They found that the energy released during a redox reaction correlates with the ability of the dopant metal atom to donate an electron.
Harvard physicists have discovered that ultrathin, atomically thin films can be tailored to reflect specific colors using an overlooked optical phenomenon. The coatings, made of gold and germanium or other elements, change color with minimal thickness changes.
Researchers at Vienna University of Technology found a special iron-oxide surface that locks single gold atoms in place, allowing them to study the chemical reactivity of individual atoms. This breakthrough could lead to more efficient catalysts, requiring less precious material.
Researchers at Rice University created starfruit-shaped gold nanorods that can enhance surface-enhanced Raman spectroscopy, allowing for more sensitive detection of organic molecules. The particles return signals 25 times stronger than similar nanorods with smooth surfaces.
Researchers fabricated optically active, three-dimensional structures using DNA origami to tailor visible light properties. The study enables the preparation of self-assembling metamaterials and novel optical lens systems.
A Yale University study has assessed the criticality of metals in the geological copper family, finding arsenic as the most vulnerable to long-term supply disruption. The research methodology evaluates supply risk, environmental implications, and vulnerability to supply restriction, highlighting the importance of considering these fact...
Researchers develop a new collector technology using water-repelling nanoparticles to recover gold, silver, and copper from waste rock. The process achieves near-100% recovery rate in laboratory experiments.
Researchers at the University of Bristol analyzed ancient rock samples to determine the origin of Earth's precious metals. They found that the planet's accessible reserves of gold and other precious elements are the result of a catastrophic meteorite shower that hit the Earth after its core formation.
A recent study by Duke University reveals a six-fold increase in Amazon deforestation in Peru, largely driven by artisanal gold mining fueled by record gold prices. The mining activities have led to widespread mercury pollution, contaminating water and soil, and posing risks to human health and the environment.
A study of over 8000 smokers found that false beliefs about cigarette risk vary by country, with 'silver', 'gold', and 'slim' cigarettes being perceived as lower-risk. Researchers call for further regulation and support for plain packaging regulations to reduce deceptive marketing.
The University of Warwick team has created a rapid method for preparing robust, ultra-thin gold films on glass, offering a viable alternative to ITO-coated glass. The resulting electrodes are chemically well-defined and can be scaled up for large area applications.
Scientists in Mexico and the US have synthesized gold and silver nanoparticles just 25 nanometers in diameter, which could have potential applications as catalysts, drug-delivery agents, and quantum dots. The analysis reveals multiple layers of shells within each particle, with some blending or alloying of metals.
Researchers at Georgia Tech have developed a new organic solvent process that selectively dissolves noble metals like platinum, palladium, and gold. This ability to preferentially dissolve these metals creates a customized system with high control over the process.
Researchers at UConn have developed new alloy materials that behave like gold and resist oxidation, reducing reliance on precious metals. These materials improve contact resistance up to one-million-fold over pure base metals, making them a promising alternative for electronic applications.
New research evidence reveals gold nanoclusters can break the O-O bond by forming a novel one-dimensional gold-oxide phase. This mechanism is predicted to dominate at ambient conditions, enabling catalysts to use ambient oxygen in reaction processes.
A University of Bristol team argues that the skeletal remains found in a Vergina tomb do not match historical records of Arrhidaios, a lesser-known figure. The remains show signs of cremation 'green' and a healed fracture on one skull, which may indicate Philip II's lost eye was transferred.
Gold and silver nanowires can form strong bonds without the need for heat, a breakthrough that could simplify the creation of high-density electronic devices. The discovery was made by Rice University researchers who observed the self-healing process under an electron microscope.
The US Green Building Council has awarded NASA's Exploration Sciences Building with the highest LEED Gold certification, recognizing its sustainable design and construction. The 200,000 sq ft building features nearly 60 laboratories and is the largest green building on Goddard's campus.
Researchers at Oregon State University and institutions have developed a new plasmonic nanorod metamaterial for medical, biological and chemical sensors. The device is up to 10 times more sensitive than existing technology and can detect various substances with high precision.
Researchers found that Cupriavidus metallidurans catalyzes gold biomineralization by transforming toxic compounds to metallic gold. The bacterium plays a key role in the formation of gold nuggets by accumulating and reducing toxic gold complexes.
Researchers at Berkeley Lab developed a technique to boost the electrical conductivity of nanorod crystals by 100,000 times using gold contacts. This method preserves the intrinsic semiconductor character of the starting nanocrystal, making it ideal for solar cells and energy production.
Researchers at NIST have developed a simple method to assemble organic molecules between silicon and metal, overcoming a key obstacle in creating individual molecule switches. This breakthrough could lead to faster, cheaper components and new applications in biosensors.
Researchers have successfully created a rotating molecular rotor on a gold surface, creating an off-axis rotation that mimics the property of machines like electric motors and generators. This breakthrough has significant implications for the development of machines for generating currents at small scales.
Researchers at UCSC developed hollow gold nanospheres with strong, narrow, and tunable light absorption. These particles can target tumors for photothermal cancer therapy, killing cancer cells with near-infrared light irradiation. The ability to tune optical properties makes them highly versatile for various applications.
Researchers found that adding a subordinate elite tier to a top-tier program enhances perceptions of status, while diluting the perception of status occurs when too many elites are added. The study shows that customers value exclusive programs even if they don't qualify for the highest tiers.