Articles tagged with Silver
Researchers at NIST have created a nanoscale electronic switch that can be turned on and off like a binary switch. The switch works by using silver whiskers to form a short circuit, which is easily detectable. Key benefits include high electrical resistance ratios and simplicity in engineering large arrays of switches.
The study found that the inhabitants of Christopher Columbus' settlement in La Isabela, Dominican Republic, desperately tried to extract silver from lead ore brought from Spain. They discovered an improvised smelting process to separate the precious metal, but their methods were not efficient.
A team of researchers, led by Alyson Thibodeau and David J. Killick, used physical sciences techniques to analyze archaeological artifacts at the La Isabela settlement. They found that the silver-bearing ore brought from Spain was extracted using an improvised smelting process, contradicting earlier historical accounts.
A recent discovery in Syria has uncovered an ancient mortuary complex containing human and animal remains, gold, and silver treasures. The site, dated to the third millennium B.C., suggests a royal cemetery with signs of ritual sacrifice, including infant and animal remains.
Scientists discovered high concentrations of silver in Jerusalem pottery, suggesting significant wealth in the city during the Second Temple period. The findings, published in Archaeometry, used X-ray fluorescence and instrumental neutron activation analysis to analyze 1,200 pottery vessels from 38 sites in Roman Judea.
Scientists have detected high levels of silver contamination in North Pacific waters, linked to atmospheric emissions from Asia. The findings suggest that silver could be used as a tracer element for tracking the fate of industrial emissions, with implications for understanding pollution patterns.
The Gemini South telescope has been coated with a silver layer to reduce thermal emissivity, allowing for deeper views of star formation, galaxies, and black holes. This results in improved detection capabilities for objects obscured by heat radiating from the telescope.
Research reveals early Andean cultures were advanced technologically, polluting the atmosphere with heavy metals and facing climate change challenges. The study suggests that several thousand tons of silver were produced in pre-Incan times, but most likely recycled or exported.
Researchers have successfully created electrical wire using prions as a template, which can be coated with gold and silver particles to conduct electricity. This bottom-up approach could revolutionize the manufacturing of nanoscale microcircuits and machines.
Researchers at Georgia Institute of Technology have created the world's smallest electroluminescent light source using individual silver molecules. The technique can lead to new optical interconnects, microscopy, and lithography applications. By applying high-frequency alternating current, they observed a dramatic enhancement in response.
The US team achieved top honors with three gold medals in 1999, including the top gold, and one silver. The students were selected from a rigorous two-week training camp and received college-level training on organic chemistry.
Researchers at Ohio State University have identified potential metal deposits in Saudi Arabia's western Shield area using GIS software. The analysis of over 2,100 known occurrences of gold, silver, copper, and other metals revealed large quantities of lower-grade metal, ideal for open-pit mining.
Researchers at Michigan Technological University found that metal contaminants in Lake Superior sediments primarily come from native ore deposits, not atmospheric sources. High concentrations of mercury were detected, associated with copper and silver deposits.
A materials scientist at Johns Hopkins University reveals a rub-free solution to remove stubborn tarnish from silver. The method uses baking soda, water, and aluminum foil to trigger an electrochemical reaction that separates sulfur from the metal, removing tarnish without harming the silver.
Researchers at Penn State have developed a new process for producing ultrafine metal powders, including silver and nickel, using a laser, household blender, and inexpensive reaction materials. The process produces particles in the 1-100 nanometer range, smaller than bacteria or viruses, with improved purity and uniformity.
Scientists have successfully carried out a chemical reaction in the world's smallest test tubes, carbon nanotubes with diameters less than ten nanometers. The research could lead to the production of new types of nanoscale devices, such as metallic wires and electronic emitters.