Articles tagged with Metals
A team led by Stéphane Dorbolo found that a disk of ice becomes highly mobile due to a levitating layer of water between it and the smooth surface on which it rests and melts. By controlling the flow dynamics of the melted ice, they can direct its motion.
Scientists at TU Wien develop new approach to controlling electron emission using two laser pulses fired at a metal tip. They demonstrate the ability to switch electron emission on and off on extremely short time scales. This breakthrough opens up possibilities for controlled x-ray generation.
A new study found that plastic stents provide similar outcomes to metal stents in patients with resectable malignant biliary obstruction. The study suggests that plastic stents may be a more cost-effective option, making them a preferable choice for patients with this condition.
Researchers at the University of Missouri are exploring alternative materials to recycle metals used in radioisotope production. They found that adding sulfides to tungsten, osmium, and molybdenum can recover up to 93% of the metals while producing needed radioisotopes, potentially cutting healthcare costs.
A team of researchers at the University of Michigan created a window in a battery to study dendrites, which cause fires in next-generation lithium metal batteries. They observed that small dendrites can be stable and even help prolong battery life, but large ones can reduce performance and raise safety concerns.
Researchers have created a hydrogel-elastomer hybrid that can prevent barnacles from sticking to metal hulls, reducing fuel costs for the Navy. The material is soft, slippery, and retains moisture, providing a long-lasting solution to biofouling.
Researchers at the University of Melbourne develop a novel approach to assemble nano-objects into complex architectures using polyphenol-coated building blocks. The technique enables the creation of 3D superstructures with enhanced chemical diversity and structural flexibility.
Researchers at Northwestern University have developed flexible, biodegradable stents that can be customized for a patient's specific anatomy using 3D printing techniques. The stents are designed to minimize complications and improve healing processes in blood vessels.
Researchers at MIT have developed a new microencapsulation technique that produces uniform, multilayered particles with high consistency. The technique uses 3D printing to create emitters that encapsulate materials, enabling efficient production of particles for pharmaceuticals and other applications.
Researchers at Oak Ridge National Laboratory develop direct-write technology to create nanoscale patterns in metallic ink, allowing for tailored material properties and customized architectures. The technique uses a scanning transmission electron microscope to control the deposition of metal onto a silicon microchip.
Researchers from Aalto University have made a breakthrough in controlling the motion of multiple objects on a vibrating plate using acoustic sources. They can simultaneously move up to six objects towards desired targets by playing carefully constructed melodies.
A survey of 77 atmospheric scientists found no evidence to support the 'chemtrails' conspiracy theory, which claims a secret government program is releasing toxic chemicals into the air. The researchers cited methods for collecting samples as a possible cause of faulty results.
An international team predicts several new types of quantum particles in materials, distinguished by intrinsic properties such as responses to magnetic and electric fields. The researchers propose that these fermions can appear in the bulk of materials, enabling a more systematic way to determine whether a system is a protected metal.
Researchers at Carnegie Mellon University and EPFL develop a computational design tool that enables designers to fully exploit the unique property of auxetic materials, which can expand uniformly in two dimensions. The tool allows for the creation of complex 3D shapes using flat sheets of plastic or metal.
The IBS team successfully detected hot electrons in a liquid interface, expanding the possibilities for catalytic reactions. This breakthrough may lead to highly efficient devices for applications such as fuel cells and artificial photosynthesis.
Researchers in South Korea have developed ultra-thin photovoltaics with a record-breaking flexibility, allowing them to wrap around small objects. The new method uses transfer printing instead of etching and produces flexible solar cells with a smaller amount of materials.
Astronomers at Indiana University have discovered a small blue galaxy, Leoncino, which contains the lowest level of heavy chemical elements (metals) ever observed in a gravitationally bound system. This finding is exciting as it could help contribute to a quantitative test of the Big Bang theory.
Research reviewing 434 patients with metal on metal total hip replacements found a revision rate of 16.4%, significantly higher than expected. The study suggests that manufacturing issues, particularly with the taper surface and liner thickness, may be to blame for early failure.
Researchers at NREL discovered a way to tune the Schottky barrier in 2D semiconductors using certain metals as electrodes. This adjustment reduces power losses and improves device performance by suppressing metal-induced gap states and Fermi level pinning effects.
A team of engineers and physicists at the University of Wisconsin-Madison created a compound that combines polar and metallic properties, defying scientific conventions. The new material exhibits both insulating and conducting properties, paving the way for devices with simultaneous electrical, magnetic, and optical functions.
A team of researchers at MIT found that spinning particles, even when separated by tens of times their size, will ultimately migrate toward each other due to long-range interactions. The phenomenon was observed in a liquid medium with inert particles and has potential applications in biological systems and synthetic materials.
Researchers found that applying a magnetic field to PdCoO2, a non-magnetic metal, increases its electrical conductivity and reduces resistance. The phenomenon was linked to the material's layered crystal structure and topological characteristics.
A team of chemists has developed a new method to make metal nanoframe catalysts, which could lead to improved hydrogen fuel production and reduced usage of precious materials. The breakthrough involves creating ruthenium nanocrystals with a unique crystal structure, increasing their surface area and catalytic activity.
A new type of lens for focusing terahertz radiation has been developed by Brown University researchers, performing as well or better than existing lenses. The device uses an array of stacked metal plates to focus terahertz waves, allowing for improved transmission and versatility in different wavelengths.
Researchers from Brown University have developed a technique that eliminates the need for highly specialized external light sources, enabling more versatile and compact devices. This breakthrough could lead to the creation of hand-held environmental sensors and biosensors that can perform complete blood workups from single drops.
A group of researchers created a unique 1D nano electronic system on the surface of a solid and observed its electronic state using photo-emitted electrons. This discovery will help elucidate the mystery of unique electronic properties of 1D nano metals.
Researchers developed a theory that combines vibrations in solid materials and liquid solidification, predicting sound waves formed when compression relaxes. Fast solidification creates large defects, resulting in a 'crackling' sound wave.
Dr. Paul Leu's CAREER award will support research on flexible metals for thin, efficient solar cells. His work aims to develop new hierarchical structures for adaptive transparent conductors and solar cells.
Metallic glue made from nanorods sets at room temperature and requires little pressure to seal, offering high thermal and electrical conductivity. The technology has multiple applications in the electronics industry, potentially replacing traditional solders and thermal grease.
Researchers developed a nanostructured metal coating that lets light through without hindering electrical access, outperforming flat surfaces. The coating combines enhanced optical transmission with electrical contact, enabling higher-efficiency optoelectronic devices.
Researchers at the University of Basel successfully transport electrons from a superconductor through a quantum dot into a metal with normal conductivity. The team measured discrete resonances, confirming theoretical predictions and demonstrating the phenomenon's applicability to quantum technology applications.
Researchers developed a flexible phototransistor that exceeds previous parameters, including sensitivity and response time. The innovative design enables improved performance in various products, such as digital cameras and night-vision goggles.
Researchers at Australian National University have successfully created a star-shaped molecule called [5]radialene, which was previously deemed too unstable. This breakthrough could lead to more efficient ways of producing medicinal agents, with the chemical industry worth nearly $1 trillion.
Researchers have found that repeated small stretching of nanoscale metal pieces can eliminate crystal defects in its crystalline structure, strengthening the material. This phenomenon is counterintuitive, as it is opposite to what one sees in larger metal crystals.
A new technique called cyclic healing uses repetitive stretching to eliminate pre-existing defects in metal crystals, significantly increasing their strength. The technique was developed by an international team of researchers and published in the Proceedings of the National Academy of Sciences.
Researchers discovered that valence change memory (VCM) cells use both negatively charged oxygen ions and positively charged metal ions for switching characteristics. This finding opens up new options for designing ReRAMs and could lead to improved performance, energy efficiency, and longevity.
Researchers have achieved record-high pressure to study osmium, finding that innermost electrons start interacting with each other due to extreme pressure. This phenomenon opens up new possibilities for discovering brand new states of matter.
Scientists at Purdue University have made a groundbreaking discovery by finding that metal can be deformed into folds while being cut, contrary to long-held assumptions. The team found that suppressing this folding behavior can reduce cutting force by up to 50%, leading to faster and more efficient machining with improved surface quality.
Scientists at the Max Planck Institute for Polymer Research discovered the fundamental parameters of Mott conduction, a key effect in magnetic memories and technologies. They found that traditional measurements underestimated the spin-asymmetry in electron scattering, which is responsible for magnetic sensor operation.
Researchers discovered a way to prevent dendrite formation in lithium metal batteries by adding chemicals to the electrolyte, improving safety and performance. The new approach could lead to more efficient and longer-lasting batteries with potential applications in electric vehicles and energy storage.
Defect-free palladium nanowires, a thousand times thinner than human hair, were stretched under controlled conditions to reveal the point where failures first appear. The study found that thermal uncertainty plays a significant role in the material's failure, with defects forming on the surface of the wire.
North Carolina State University researchers develop tunable liquid metal antenna controlled by voltage, allowing for dynamic changes in operating frequency and radiation pattern. This innovation enables miniaturization and adaptation to correct near-field loading problems, making it highly desirable for mobile devices.
Researchers at Lehigh University discovered that randomly oriented metal nanowires improve conductivity, contradicting expectations that highly ordered configurations would outperform them. The study found that restricting nanowire orientation slightly increases parallel conductivity but reduces perpendicular conductivity.
A study published in Nature found that galaxies are being strangled to death due to a lack of raw materials needed to form new stars. The team analyzed metal levels in over 26,000 galaxies and found that dead galaxies have higher metal content than alive ones.
New research reveals that mining pollution has led to a significant reduction in the genetic diversity of brown trout populations in southwest England. The study found that these fish have adapted to live in water with high levels of metal contaminants, but this adaptation comes at the cost of reduced genetic variation.
Researchers create a single-step pathway to complex decalins, potentially leading to therapeutic agents. The study reveals unique reactivity patterns of metal-carbon bonds in complex structures.
Research on River Deba sediment pollution reveals the impact of anthropogenic inputs and flooding events on metal distribution. The study found a clear increase in organic matter and metals between the headwater and mouth of the river, with highly polluted sediments reflecting upstream pollution.
Researchers proposed a new constitutive model to accurately describe the thermo-elasto-plasticity deformation of metal crystals at various temperatures. The model uses a simple and efficient approach, considering thermal expansion and its effects on plastic behavior.
Researchers have demonstrated autonomous locomotion in large self-powered soft liquid metal vehicles. The vehicles can divide into smaller ones while maintaining their motion and reunite seamlessly when close to each other.
The USGS has released a new map that portrays the diverse pieces of Earth's crust comprising the nation's geologic basement. The map provides a framework for examining mineral resources and other geological aspects by considering the age and origin of the basement rocks.
Cathleen Crudden, a Canadian scholar at Queen's University, has been awarded the 2015 Killam Research Fellowship. She will support her ongoing project on organically modified metal surfaces for biosensing and beyond. Her research focuses on using boron chemistry to catalyze organic synthesis and materials chemistry.
A team of researchers has found a way to strip out metallic carbon nanotubes from arrays using a simple, scalable procedure, leaving behind semiconducting nanotubes suitable for electronic devices. This breakthrough could lead to the development of smaller, faster, and cheaper electronic devices.
A Dartmouth College study has found that the placenta can be used to measure arsenic exposure in pregnant women and their fetuses. The study, which analyzed 652 placentas, showed a positive association between placental arsenic concentrations and maternal-to-infant arsenic transfer ratios.
Researchers found that periphyton, a community of algae and bacteria, helps transform mercury pollution from a Superfund site along the Androscoggin River into a more toxic form of mercury. Lower-than-expected levels of methylmercury were also detected in crayfish and small fish downstream from the site.
Researchers at the University of Rochester have developed a method to create extremely water-repellent metals using lasers, which can lead to efficient solar absorbers and self-cleaning surfaces. The technique creates multifunctional surfaces with both super-hydrophobic and highly-absorbent optical properties.
Scientists have successfully tracked the motion of electrons in metals using laser pulses, achieving attosecond precision. The results demonstrate that electrons travel through metals ballistically, with their arrival times dependent on layer thickness. This breakthrough has significant implications for the miniaturization of electroni...
Researchers at the University of Guelph have developed a simple procedure to transport wet farm waste and produce energy from it. Pressure cooking yields compact, easily transportable material that can be used in energy-producing plants, producing similar amounts of energy as coal.
A new technique allows ultrasound to penetrate bone and metal, enabling medical professionals to monitor blood flow in the brain or treat brain tumors more effectively. The metamaterial structure offsets distortion caused by these 'aberrating layers,' increasing wave energy transmission by up to 88%.
Scientists at the University of Wisconsin-Madison developed a new process to convert lignin, a biomass waste product, into simple chemicals. The innovation could replace petroleum-based fuels and chemicals with biorenewable materials.
A growing body of evidence links metal fumes to a heightened risk of bacterial lobar pneumonia in welders. New data shows welders are more than 3.5 times as likely to die from pneumococcal pneumonia compared to other workers.