Articles tagged with Gold
Research suggests that hydrous and repeated mantle melting is key driver of gold enrichment in island arc magmas. The study found that high-degree melting leads to significant concentrations of gold, often several times higher than those found in mid-ocean ridge basalts.
A study investigates uranium exposure in children living near gold mining dumps and finds higher levels of uranium in their hair compared to children from reference sites. The study collected over 400 hair samples and analyzed them alongside information on the children's age, gender, and living conditions.
A team of researchers at Northern Arizona University discovered that fabricated gold, copper and iron nanocrystals exhibit pentagonal constructs resembling natural snowflakes, governed by emergence dynamics. This phenomenon holds key findings for controlling nanomaterial synthesis and advancing the field.
A recent study reveals that mercury pollution from artisanal and small-scale gold mining directly contaminates food crops through the air, not soil. This poses a significant risk to human health and food security in Africa, where millions of people depend on local agriculture for survival.
A team of Japanese researchers has uncovered the deformation processes that give Kanazawa gold leaf its remarkable thinness and brilliance. The study used electron microscopy to reveal the activation of a rare crystal slip system, providing insights into the traditional crafting technique.
Researchers create nanoscale slots to tune phonon vibrations, enabling ultrastrong coupling and hybrid quantum states in lead halide perovskite. This breakthrough could improve energy flow and performance in optoelectronics.
A team of materials scientists at Rice University developed a new way to grow ultrathin semiconductors directly onto electronic components using chemical vapor deposition. The breakthrough technique eliminates the fragile manufacturing step, potentially speeding up development of next-generation electronics and computing.
Researchers from UK and Canada will study ways to reduce mining's environmental footprint and enhance efficiency across critical mineral value chains. The project aims to develop new geological models and exploration tools for rare earth element deposits, aiming to diversify the supply chain and ensure high environmental standards.
Scientists from the University of Göttingen have made a groundbreaking discovery, finding ruthenium in volcanic rocks on the islands of Hawaii. The finding suggests that material from the Earth's core is leaking into the mantle above, challenging previous assumptions about the planet's internal dynamics.
A new study reveals that magnetar flares could be a potential source of heavy elements in the universe. By analyzing archival data and observations of magnetar flare events, researchers estimate that up to 10% of heavy elements like gold, uranium, and platinum may come from these cosmic explosions.
A Roman treasure hoard found in Thetford Forest indicates the town was a pagan cult centre until the 5th century. The hoard's diverse origins from across the Roman empire support this new chronology.
Researchers at Cornell University have developed a cost-effective way to track atmospheric mercury using wild fig tree rings in the Peruvian Amazon. This method offers a potential solution for understanding mercury spread and impact on ecosystems.
Researchers found that Ficus insipida tree cores can be used to characterize spatial and potentially temporal mercury emissions from artisanal gold mining. Tree rings showed higher mercury concentrations near mining sites, indicating a potential network of biomonitoring.
Researchers successfully synthesized polyaniline with a golden luster, exhibiting unique properties and potential for micro-organic semiconductor devices. The material's metallic luster is attributed to polarons and surface luster, setting it apart from conventional conductive polymers.
A French research team has discovered that an organogold(III) complex accumulates selectively in the mitochondria of lung cancer cells, demonstrating its potential as an anticancer treatment. The complex's antitumor activity is attributed to its interactions with specific biological molecules, disrupting their function.
Researchers at Cornell University developed a method to extract gold from e-waste using vinyl-linked covalent organic frameworks (VCOFs), capturing 99.9% of the precious metal while minimizing other metals. This approach converts CO2 into useful chemicals, reducing waste disposal demands and providing environmental benefits.
A UNIGE team has demonstrated that sulphur in its bisulphide (HS- ) form plays a critical role in transporting gold in magmatic fluids. The study uses innovative methodology to replicate extreme pressure and temperature conditions, providing new insights into the formation of precious metal ore deposits.
Scientists at Lund University and Hokkaido University have successfully synthesized 2D gold monolayers with remarkable thermal stability and potential catalytic utility. The team used a novel bottom-up approach combined with high-performance computations to create macroscopically large gold monolayers with unique nanostructured patterns.
Scientists create diacetylene derivative-based luster materials with tunable colors and metallic lusters, opening new possibilities for applications in jewelry, printing inks, and cosmetics. The developed material can express a golden luster selectively using light irradiation, minimizing environmental footprint and weight.
Researchers have developed a cost-effective and easily reproducible point-of-care testing device that can accurately measure cortisol levels in the blood. The device uses iridium oxide nanoparticles to improve stability, sensitivity, and selectivity, allowing for commercial use.
Researchers at Linköping University have created soft electrodes made of gold nanowires and silicone rubber, capable of stimulating nerve signals and capturing electrical signals. The material is expected to last for at least three years and has potential applications in medical devices.
Researchers found seawater mixed with ore fluids to form gold, revealing a new mechanism for gold vein formation. This discovery could lead to the identification of high-grade gold deposits in sub-seafloor settings, reducing environmental impact.
A team of UCF researchers is exploring the use of gold to develop a novel method to rid drinking water of harmful algal blooms, which produce toxic effects on humans and wildlife. The project aims to remove microcystins, toxins linked to liver damage, kidney failure, and allergic reactions.
Scientists at Linköping University have created sheets of gold only a single atom layer thick, termed goldene. This material has given gold new properties that can make it suitable for applications such as carbon dioxide conversion, hydrogen production, and selective production of value-added chemicals.
Researchers at the University of Illinois have developed a novel electrochemical process to extract precious metals, including gold and platinum group metals, from discarded electronics and low-grade ores. This method uses less energy and fewer chemical materials than current methods, producing high-purity metals with minimal waste.
Scientists at ETH Zurich have developed a novel method to extract gold from electronic waste using a protein matrix sponge. This sustainable approach yields a high percentage of gold recovery with minimal energy consumption, making it commercially viable.
Researchers at the University of Tokyo discovered a way to improve gold catalysts' durability by creating a protective layer of metal oxide clusters. The enhanced gold catalysts can withstand a greater range of physical environments, increasing their range of possible applications and reducing energy consumption.
Researchers are working to better understand and reduce the health risks associated with mercury use in artisanal and small-scale gold mining. A new approach has been piloted, which can help reduce mercury emissions in these mines.
Researchers developed an integrated wearable sensor device using gold nanowires to measure multiple bio-signals simultaneously. The sensors demonstrated remarkable performance in detecting muscle tremors, heartbeat patterns, and body temperature changes.
Researchers at Xi'an Jiaotong-Liverpool University have developed a sensitive and robust pH sensor that can detect pH variation in just a few microliters of samples. The new sensor uses novel materials and methods to overcome the current method's limitations, which are not sensitive enough or fragile for commercial-scale use.
Researchers have developed a metal nanocluster-based separator for lithium-sulfur batteries, accelerating electrochemical kinetics and improving capacity and cycling stability. The technology has the potential to increase the adoption of sustainable energy storage systems, including electric vehicles and renewable energy.
Researchers at Stanford University have synthesized a stable form of gold that has lost two negatively charged electrons, known as Au²⁺. This exotic chemical state is made possible by the use of halide perovskites, which hold promise for various applications including solar cells and electronics components.
Researchers at Vienna University of Technology have discovered a new metallic alloy of nickel and gold that exhibits exceptional thermoelectric properties, enabling high electrical power generation. The alloy outperforms conventional semiconductors in terms of power density and thermoelectric efficiency.
A study by Florida Atlantic University found that nearly all wristbands (95%) are contaminated with harmful bacteria, including E. coli and staphylococcus. The study suggests using metal types like gold and silver, which had little to no bacteria, and recommends regular sanitizing of wristbands, especially after gym activities.
A team from Chiba University created an AuNi alloy on Au electrodes, showing increased hydrogen evolution reaction activity due to surface defects formed through Ni dealloying. The study used X-ray photoelectron spectroscopy and surface X-ray diffraction techniques to analyze the surface properties of the AuNi/Au catalyst.
A team of researchers from China and the UK has developed new ways to optimise the production of solar fuels by creating novel photocatalysts. These photocatalysts, such as titanium dioxide with boron nitride, can absorb more wavelengths of light and produce more hydrogen compared to traditional methods.
New research at ECCMID 2023 presents 19 gold complexes effective against at least one hard-to-treat bacterium, including MRSA and Pseudomonas aeruginosa. The gold-based drugs use a multimodal mechanism to kill bacteria, preventing antimicrobial resistance from developing.
Researchers from Japan have synthesized two di-superatomic molecules composed of Ag and evaluated the factors involved in their formation. The study found that a twist between the two icosahedral structures stabilizes the nanocluster by shortening the distance between them. Additionally, the presence of Pd and Pt central atoms was foun...
Scientists at TU Wien have developed a technique to control the shape and size of nano gold structures using highly charged ions. The experiment shows that the impact force is not the decisive factor, but rather the electrical charge of the ions, which deposits energy at the point of impact and disrupts the crystal structure of the gold.
Researchers at Tata Institute of Fundamental Research developed a plasmonic black gold-nickel catalyst that efficiently converts CO2 into chemicals using solar energy and green hydrogen. The catalyst shows a multifold increase in catalytic activity, achieving a high production rate of 2464±40 mmol g−1 h−1 with over 95% selectivity.
Researchers have developed a new spectroscopy technique called filament- and plasma-grating-induced breakdown spectroscopy (F-GIBS), which improves the sensitivity of trace metal detection in liquid samples. The technique uses fluid jets to analyze aqueous solutions and achieves high precision by avoiding detrimental influences of liqu...
Researchers have developed a low-cost way to extract gold and other valuable metals from electronic waste, which can be used as catalysts for reactions in pharmaceutical manufacture. The process has the potential to improve the sustainability of drug production by reducing dependence on environmentally damaging mining practices.
Researchers develop new technique to observe plasmons inside gold nanoparticles, revealing relaxation process with implications for energy conversion and development of light-harvesting materials. The ultrafast electron microscope enables analysis of ultrafast light-matter interactions at the nanoscale.
Researchers analyzed three intervention strategies to mitigate mercury use and emissions in artisanal gold mining, finding that while some methods reduce emissions, others create new environmental problems. The study suggests a need for more comprehensive approaches to address the complex issues surrounding mercury use.
Researchers at the Paul Scherrer Institute use advanced microscopy to visualize fine details in Zwischgold, a highly advanced medieval material. The technique reveals the structure and composition of the material, shedding light on its production methods.
Researchers have successfully simulated the formation of the herringbone texture on Au(111) surfaces using a neural network method. The study revealed that non-negligible deformation underneath the surface is critical for the texture's formation, and it becomes sensitive to applied strains.
A new study finds that Harry Potter's economic model is distorted from professional models, influencing readers' views on economics. The paper highlights key aspects of the 'Potterian economy,' including its critique of market-based systems and government corruption.
Researchers develop a new method to assess inconsistencies in mercury trade data for ASGM, highlighting potential illegal and informal mercury use flows. The study identifies inconsistencies in Hg trade statistics in African, Central and South American, and some Asian countries.
Researchers at Politecnico di Milano developed a new nanomaterial with a superfluorinated gold cluster, exhibiting unique optical and catalytic properties. The findings have potential applications in precision medicine and the green transition, including diagnostic and therapeutic applications and efficient production of green hydrogen.
Researchers developed yolk-shell nanocrystals containing metallic gold yolk with semiconductor shells, exhibiting high photocatalytic activity. The structures were synthesized using a sequential ion-exchange process and evaluated using XPS and PL spectroscopy, revealing electronic interactions favorable for photocatalysis.
A team of scientists has developed a method to extract precious metals like gold and platinum-group metals from electronic waste using the Picasso pigment, Prussian blue. This technique shows promise in improving the recycling of valuable metals from nuclear and electronic wastes.
Researchers at Clemson University and SSSIHL discovered a novel way to combine curcumin and gold nanoparticles to create an electrode that efficiently converts ethanol into electricity. The discovery brings replacing hydrogen as a fuel cell feedstock one step closer, with potential applications in sensors and supercapacitors.
A team of researchers from PNNL and UW successfully designed a bio-inspired molecule that directs gold atoms to form perfect nanoscale stars. The work is an important step toward understanding and controlling metal nanoparticle shape and creating advanced materials with tunable properties.
Researchers at the University of Ottawa developed a spray-on technology using customized nanogold and peptides that can restore heart function and electrical conductivity in damaged hearts. The therapy showed promising results in lab mice, with no off-target organ infiltration by tiny gold particles.
A study published in Applied Economics analyzed the relationship between precious metal commodities and equity markets, revealing that gold and aluminum are the most desirable metals for investment. The research also found that copper and zinc have the largest spillovers on global equity indices.
Researchers develop small-molecule serial femtosecond crystallography, enabling precise analysis of complex materials. The technique reveals accurate atomic structures of previously unsolvable compounds.
Researchers developed a method to directly bond gold electrodes onto separate ultra-thin polymer films without adhesives or high temperatures. The new technique, called water-vapor plasma-assisted bonding, creates stable bonds between gold electrodes printed into ultra-thin polymer sheets.
The report reveals that electronic waste generated in the region rose by 50% between 2010 and 2019, with only 3.2% collected and safely managed. The regional e-waste total jumped from 1.7 Mt to 2.5 Mt, with Russia generating the most e-waste.
Osaka University researchers develop nanoantenna to enhance quantum information transfer, enabling more efficient and secure data processing. The device focuses light onto a single quantum dot, improving photon absorption by up to 9 times.
Researchers at MIT and UNH find that binary neutron star mergers produce two to 100 times more heavy metals than neutron star-black hole mergers. The study suggests that binary neutron stars are a likely cosmic source for gold, platinum, and other heavy metals.