Articles tagged with Silver
Researchers have discovered that silver nanoparticles' toxicity can be modulated by carbohydrate coatings, according to a recent study published in the Journal of Nanobiotechnology. The study found that glucose-coated silver nanoparticles are more toxic than those coated with galactose or mannose.
Researchers used x-rays to visualize the formation of a highly conductive silver matrix in lithium-based batteries, revealing its link to the battery's rate of discharge. The study suggests new design approaches and optimization techniques for improving battery performance.
A study by RAND Corporation found that consumers in regions with more health plan choices faced higher deductibles than peers in areas with fewer plans offered. The study suggests that limiting the number of health plans or requiring equivalent cost-sharing terms may be policy options to address this issue.
The study compares the interactions between silver nanoparticles and two thiols, mercaptohexanol (MH) and cysteine. MH forms a sparingly soluble silver(I) thiolate complex AgSRm on the surface, while cysteine replaces the citrate capping agent to form cysteine capped nanoparticles.
Researchers identify picene as a potential candidate for small-scale electronics due to its high carrier mobility and chemical stability. A thin layer of picene molecules attached to a silver surface maintains its structure and function.
A new study from the University of Exeter challenges traditional views on magpie behavior, finding that these birds are not attracted to shiny objects. Instead, they exhibit neophobia, or fear of new things, when encountering novel and unfamiliar items.
A study by Empa found that silver-coated textiles release hardly any nano-particles during washing, unlike conventional coatings. The team also discovered that these textiles generally lose less silver during washing due to the smaller amount of silver incorporated into fabric with nano-coating.
Researchers have developed a method to produce silver nanostructures using high-pressure diamond plates, outperforming traditional chemical methods. This approach enables the creation of flexible electronics, transparent electrodes, and new classes of chemically and mechanically stable nanostructures.
Researchers at Queen Mary University of London have discovered a new chemical to aid drug manufacturing processes, making it more environmentally-friendly and easier to scale up for industry. The team found that a positively charged molecule known as TMA can replace silver in the manufacturing process, reducing costs and waste.
The researchers designed a nanoparticle with a peptide coating to target tumor cells, allowing for efficient drug delivery. The shell is etchable, enabling the removal of excess particles using biocompatible chemicals.
A team of scientists has visualized the desorption of oxygen molecules from a silver surface using low-energy electron microscopy. They found that the process involves isolated islands breaking up on the surface, leading to discrepancies between theoretical predictions and experimental measurements.
A study from the University of Southern Denmark reveals that nano-silver can lead to changes in human intestinal cells, causing an overproduction of free radicals and potentially contributing to diseases like cancer and Alzheimer's. The researchers emphasize caution against consuming dietary supplements containing nano-silver.
Recent research by Eawag and EPFL suggests that silver nanoparticles are not toxic to certain types of algae, which can survive even low concentrations of silver ions. However, this finding raises concerns about the potential impact on higher organisms, such as fish and other aquatic life.
Researchers at the University of Delaware have developed a highly selective catalyst that can convert carbon dioxide to carbon monoxide with 92 percent efficiency. The nano-porous silver electrocatalyst offers high selectivity and is significantly more active than other catalysts, making it a promising route for clean energy.
Researchers found ozone, UV, and humidity significantly impact silver's corrosion rate. By understanding these factors, new models can predict atmospheric corrosion rates and improve performance. The study also aims to explore other metals' corrosion behavior.
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.
Researchers at the University of Illinois Chicago have developed a novel co-catalyst system that efficiently converts carbon dioxide to carbon monoxide, a useful starting material for synthesizing fuels. The system uses inexpensive and easy-to-fabricate carbon-based nanofiber materials, offering a promising solution for producing synth...
A new solar cell design featuring copper electrodes has surpassed traditional heterojunction cells in efficiency without special equipment or expensive materials. The innovative approach could disrupt the solar industry by reducing costs and increasing production capabilities.
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 have created a sturdy, transparent, and indium-free electrode from silver (Ag) and titanium dioxide (TiO2) that could replace indium-based electrodes. The new electrode has a low sheet resistance and high optical transmittance, necessary for high-performance devices.
Scientists have created a self-sterilizing composite material derived from Douglas fir needles that can coat medical implants and surgical devices to prevent microbial growth. The material uses silver nanoparticles generated from the plant extract, which acts as a natural chemical reducing agent.
Researchers from the Institute of Solid State Physics found that superconductivity is intrinsic to a bismuth-based layered material when doped with silver. The material's characteristics were measured using x-ray diffraction, magnetic susceptibility, electrical transport, and thermal transport.
The Geological Society of America's GEOLOGY journal has posted 35 new studies online, covering various disciplines such as volcanology and paleoclimatology. These studies explore topics like super-eruptions, vegetation change, and geochemical asymmetry in hotspot volcanoes.
Researchers at Brown University have discovered how ingesting too much silver leads to argyria, a rare condition where skin turns grayish-blue. The study shows that silver nanoparticles are broken down into silver salt in the stomach, which is then absorbed into the bloodstream and deposited in the skin.
UCLA's heart transplant program has been ranked among the nation's best by the Health Resources and Services Administration (HRSA), with a silver-level ranking for its high transplant rates and patient survival. The program is one of only seven nationwide to achieve this level, and it has earned a silver ranking twice, including in 2010.
Researchers at University of New Hampshire and Conductive Compounds Inc. are developing nanoparticles of silver suitable for screen-printing onto photovoltaic solar panels. The project aims to create more conductive and cost-effective solar panels, with potential applications in the increasing global energy market.
Researchers have developed a simple, low-cost method to synthesize silver nanoparticles using strawberry tree leaf extract. The technique allows for control over nanoparticle size and geometry, resulting in stable particles that remain effective for up to 6 months.
Researchers found that silver nanoparticles are less toxic to bacteria than their released ions. The team's study suggests that controlling the rate of ion release can enhance antibacterial properties and mitigate environmental impacts. They also discovered hormesis, where low doses of silver ions stimulate bacterial growth.
Researchers studied adhesion of E. coli to silver- and copper-coated porous clay ceramic surfaces, with silver nanoparticles showing highest affinity for bacteria. Copper may be a less expensive alternative to colloidal silver as a disinfectant coating.
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 at Harvard University have developed a new method to create three-dimensional patterns of silver dots using a femtosecond laser. This technique advances nanoscale metal lithography and enables the creation of bulk metamaterials with unique optical properties.
Scientists have developed a method to imbue yeast with magnetic properties, enabling potential applications in medical, industrial, and research settings. The technology could be used to target and isolate specific cells, guiding them toward certain manufacturing processes or interacting with non-living machinery.
A new study finds arsenic to be the most critical metal, followed by silver and selenium, in sustaining modern technology. The research highlights the need for corporations and nations to identify their unique set of critical materials and stabilize supply chains.
Researchers use metal-organic frameworks (MOFs) to remove volatile radioactive gas from spent nuclear fuel, reducing waste and increasing the possibility of clean nuclear energy production. The discovery could be applied to nuclear fuel reprocessing or cleanup of nuclear reactor accidents.
The University of Illinois has created a reactive silver ink that can print small, high-performance electronics on flexible plastics, papers, or fabrics without the need for metal particles. The ink is faster to make, more stable, and suitable for smaller nozzles, making it ideal for printed microelectronics.
Researchers have discovered a way to self-assemble uniform polyhedral silver nanocrystals into densest packings and exotic superlattices, opening the door to simpler fabrication of plasmonic materials. The technique uses gravity-driven sedimentation and allows for precise control over superlattice dimensions.
Scientists discover miniscule metal nanoparticles naturally occurring in silver articles, jewelry, and utensils, revealing a dynamic behavior that changes over time. This finding challenges traditional views on nanoparticle toxicity and suggests humans have been exposed to these particles for millennia.
Researchers found that organic memory transistors retain their on/off states over a wider voltage range when heated, despite initial decreases in memory window. This temperature-dependent behavior could be useful for applications such as temperature sensing.
Researchers have created a silver pen capable of writing electrical circuits and interconnects on various surfaces, enabling low-cost and disposable electronics. The pen's ink maintains conductivity through multiple bends and folds, allowing for flexible devices.
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.
Scientists have developed a new food packaging material called 'killer paper' with silver nanoparticles that fights bacteria causing spoilage. The coating is effective against E. coli and S. aureus, killing bacteria in just three hours.
Researchers have shown that nanosilver is not a new discovery but has been used for over 100 years to prevent bacterial growth. Nanoparticles have different properties than larger particles, making them more reactive and toxic to bacteria.
Scientists have developed a new food packaging material that uses silver nanoparticles to fight bacteria and extend shelf life. The material has been shown to be effective against E. coli and S. aureus, two common causes of bacterial food poisoning.
Researchers at NC State University create core/shell nanoparticles with gold and silver, as well as alloy nanoparticles, using the 'digestive ripening' technique. This method allows for control over optical properties of the resulting nanoparticles.
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.
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.
Empa researchers create simple networks of organic nanowires with perfectly monocrystalline structure. The nanowires can be combined to form complex electronic circuits, including solar cells and transistors.
Researchers at Argonne National Laboratory have developed a new material that can decompose organic molecules in polluted water using visible light. By decorating silver chloride nanowires with gold nanoparticles, they have created a photocatalytic system that can break down pollutants like methylene blue.
Researchers have developed a method to deterministically position silver nanoparticles onto self-assembling DNA scaffolds, paving the way for new biomedical applications and precise sensing operations. The study demonstrates the viability of using silver instead of gold nanoparticles in DNA-based architectures.
Researchers have developed thin films of silver and copper that can kill bacteria, potentially helping to reduce hospital infections. The antimicrobial properties of these metals have been known for centuries, and a recent study found that combining them may work synergistically to better eliminate microbes.
Researchers have developed a tiny, gold nanocage that responds to light and releases carefully titrated amounts of chemotherapy drugs at specific tissue sites. The system is designed to maximize the beneficial effects of the medication while minimizing side effects.
Researchers at Ohio State University discovered that adding silver nanoparticles to plastic boosts electrical current generation in polymer semiconductors, increasing efficiency. The new fabrication technique allows for a wider range of wavelength absorption, promising advancements toward commercially viable solar cells.
The University of Utah has developed a two-minute water quality monitoring method that uses a handheld color sensor to detect iodine or silver levels in drinking water. The system is designed to be simple, low-cost and safe for use on the International Space Station.
Researchers at Penn State University have successfully determined the geometry of C60 molecules on a silver surface using low-energy electron diffraction. The findings reveal a 'hole' beneath each molecule that reinforces bonding between carbon and silver, opening doors to studying technologically important molecules.
The Association for Research in Vision and Ophthalmology (ARVO) has announced its inaugural class of Fellows, honoring members who have made significant contributions to vision research and ophthalmology. The ARVO Fellow title recognizes outstanding achievements in leadership, collaboration, and dedication to advancing the field.
A study by Wan Li Low and colleagues found that combining low concentrations of tea tree oil and silver increases antimicrobial activity against pathogens like Staphylococcus aureus and Candida albicans. This method allows for controlled release and may lead to safer, over-the-counter antiseptic compounds.
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.
Researchers found that silver-coated endotracheal tubes significantly reduced ventilator-associated pneumonia (VAP) rates, with a 36% decrease compared to uncoated tubes. The study also showed that silver-coated tubes can delay VAP onset and reduce its severity.
A team led by Byron Brehm-Stecher is investigating the potential of silver nanoparticles to improve food safety. They aim to develop applications such as antimicrobial fabrics and surfaces, which could help kill foodborne pathogens and enhance shelf life.
Using a tabletop laser, researchers have successfully transformed pure metals into various colors, including gold, aluminum, black platinum, and blue silver. The process involves creating nanostructures on metal surfaces that selectively reflect specific colors.