Articles tagged with Metals
Physicists at the University of Texas at Austin have developed the thinnest superconducting metal layer made from lead, measuring only two atoms thick. This achievement lays the groundwork for future innovations in superconductor technologies.
Researchers at the University of Rochester have developed a metal slab that can lift liquids using capillary action, moving them at speeds faster than nature. The metal's surface structure can be controlled to direct liquid flow or even create hydrophobic surfaces that prevent germ growth.
A landmark study published in the New England Journal of Medicine found that paclitaxel-eluting stents reduce target lesion revascularization rates and binary angiographic restenosis compared to bare-metal stents. The study also showed comparable safety profiles for both types of stents.
The researchers used mechanical forces to control catalytic activity, initiating chemical reactions and creating a 'molecular ripcord' that can switch between dormant and active states. This discovery enables the creation of self-repairing materials that strengthen under mechanical stress.
Professor Geoffrey Gadd's research explores how microbes interact with metals and minerals, degrading ammunition and transforming pollutants. His work has significant implications for environmental biotechnology and nuclear decommissioning.
The study found that drug-eluting stents are safer and more effective than bare metal stents in preventing deaths and heart attacks. Over a two-and-a-half-year follow-up period, patients who received drug-eluting stents had a 25% reduction in death and a 24% reduction in heart attacks.
Researchers at Lehigh University have developed a nanoscale grating structure that can trap and release light waves at multiple locations and different frequencies. The structure, made of graded metal depths, enables the control of light waves on a chip, paving the way for applications in spectroscopy, sensing, and medical imaging.
Researchers have developed a new method to boost the efficiency of solar cells by using nanoparticles. By scattering light and improving color-specific capture, this approach could significantly improve sunlight conversion rates.
A new study published in CMAJ found that patients receiving drug eluting stents had better outcomes, including lower mortality rates, compared to those with bare metal stents. However, the study also noted an increased risk of repeat revascularization procedures or death after three years.
A study published by the Radiological Society of North America (RSNA) reports on the successful diagnosis and removal of self-inflicted foreign objects from adolescents. The minimally invasive procedure allowed for safe and precise removal of embedded objects with minimal scarring.
A team of Boston College and MIT scientists has discovered a new class of exceptionally effective catalysts that promote the powerful olefin metathesis reaction, opening up a vast new scientific platform. The new catalysts provide unprecedented control and selectivity for complex chemical reactions.
Researchers at Harvard University have demonstrated that metal nanoparticles in a periodic array can exhibit narrower spectral widths, improving the sensitivity of detecting molecules at low concentrations. By optimizing electromagnetic interactions between particles, the method can enhance spectroscopy and biosensors.
Cornell researchers develop a cost-effective method to create nanoscale devices by manipulating fluid droplets and using silicone rubber molds. The technique allows for the production of various architectures, including wires, disks, squares, triangles, and superlattices, with potential applications in computer memory and photonics.
A clinical trial showed that drug-eluting stents are more effective than bare metal stents in reducing target lesion revascularization rates by 41% and binary restenosis by 56%. The use of drug-eluting stents also demonstrated comparable safety, with a reduced risk of major adverse cardiovascular events.
Researchers predict when Kondo effect occurs based on magnetic atom geometry, enabling new nanoscale devices. The discovery represents a major advance in understanding this fundamental physical phenomenon.
Drug-eluting stents should be avoided in patients with diabetes, short lesions, or large vessel sizes due to high restenosis risk. Extended dual antiplatelet therapy also poses bleeding complications, making bare metal stents a safer option for some patients
Caltech bioengineers create a super-compact high-resolution microscope, small enough to fit on a finger tip, operating without lenses. The optofluidic microscope can be used in the field to analyze blood samples and mass-produced for $10.
Researchers at the University of Florida have successfully reduced the Casimir force by altering the surface of metal plates, which could help mitigate stiction in microelectromechanical devices. The findings could pave the way for further miniaturization and potentially impact various consumer products.
Researchers have developed a technique to attach light-sensitive organic molecules to metal surfaces, enabling reversible switching between two configurations in response to different wavelengths of light. This technology has potential applications in molecular motors, artificial muscles, and molecular electronics.
NIST researchers have discovered that a single layer of molecular 'salve' can significantly reduce surface stress, which is crucial for applications like chemical and biological sensors. The 'salve' reduces stress by allowing atoms to adopt the molecules into their family, resulting in a more stable and tension-free surface.
Researchers at NIST developed a new method to sort carbon nanotubes by length using high-speed centrifuges. This technique shows promise for scaling up production of high-quality nanotubes with specific lengths, crucial for various applications in electronics, medicine, and displays.
Researchers at the Naval Research Laboratory have successfully produced carbon nanotubes in high yields using commercially available aromatic containing resins. The method enables the production of MWNTs in moldable solid forms, films, and fibers with varying amounts of nanotubes and amorphous carbon.
Researchers found that over one-third of tropical soil samples can generate severe limitations for landmine detection using metal detectors. The study provides a classification scheme for predicting detector performance and highlights the importance of considering soil development in de-mining missions.
Researchers found potentially dangerous levels of mercury and arsenic in Lake Baiyangdian, a source of drinking water for thousands. The study highlights the need to apply US environmental research to China's rapidly industrializing environment.
Miniature smart dust probes are being developed to collect data on fluid systems. Researchers have also created stealthy gas-filled antennas that can be reconfigured for improved signal reception, while a new analysis improves calculations for high-energy physics experiments by factors of a million
University of Wisconsin-Madison engineers successfully blended modern semiconductor tech and nanomachines, opening doors to new tiny mechanical devices. The new work enables sensors capable of measuring single biological molecules and has implications for solar energy cells, battery technology, and highly sensitive light-emitting diodes.
A meta-analysis of 38 trials and data from 18023 patients found that siromilus-eluting stents have a reduced risk of heart attack, with a 19% lower risk compared to bare-metal stents and a 17% lower risk compared to paclitaxel-eluting stents.
The SCAI has announced that its leaders are available for comment on numerous studies, trials, and data releases at the upcoming European Society for Cardiology Congress. These studies focus on interventional cardiology, percutaneous intervention, angioplasty, and stents.
University of Arizona physicists have discovered 'super crystals' in certain organic semiconducting solids, which could create splashes of current and exhibit unique electrical properties. This discovery was made possible by analyzing experimental data from a previous study on a mysterious solid-state phase in a semiconductor.
Porphyrin molecules change color when oxidized or reduced, allowing researchers to track individual molecules and understand redox reactions. This breakthrough could lead to advances in molecular electronics, catalysis, information storage, and solar energy conversion.
Researchers have discovered a new physical phenomenon called acoustic plasmon, which can be triggered into an excited state with very low energy input. This discovery could have significant implications for the design of ultra-high velocity electronic devices and materials for medical applications.
A study found that diabetic patients who continued long-term clopidogrel therapy had lower rates of heart attack and death compared to those who discontinued the medication, regardless of stent type. Long-term clopidogrel therapy was particularly beneficial in reducing mortality risk with bare metal stents.
A panel of experts shares their perspective on the causes of stent thrombosis, including early discontinuation of anticoagulation medication and stent fracture. The latest research on its prevention will also be discussed, highlighting the need for better strategies to solve this problem.
Researchers at UCR have discovered cyclic alkyl amino carbenes (CAACs), which can mimic the behavior of metals in splitting hydrogen under mild conditions. This breakthrough could lead to the development of carbon-based systems for storing hydrogen and producing useful amino compounds.
X-ray scattering techniques have been successfully applied to determine how dissolved metal ions interact in solution, revealing their structures and long-range interactions. This research helps understand how metal ions behave in the environment and has implications for predicting reactions to metal contaminants.
A new Mayo Clinic study found that heart patients' likelihood of receiving a drug-eluting stent varies greatly by insurance type, hospital location, and procedural volume. Patients with private insurance are more likely to receive a drug-eluting stent than those with Medicare or Medicaid, while hospitals serving large numbers of Medica...
Researchers at the University of Delaware will identify nano-sized catalysts to convert liquid fuels into hydrogen. The goal is to supply affordable hydrogen with reduced emissions for powering cars and heating homes.
Scientists at Harvard University have developed a method for creating microfluidic channels with parallel metal wires, allowing for the control of magnetic components. The method uses polydimethylsiloxane resin and molten solder to produce stable metal cables, which can generate strong magnetic fields within the channel.
Researchers at Queen's University have devised a novel approach to creating emulsions, which can be used for various industrial applications such as cleaning up oil spills and extracting oil deposits from tar sands. The new 'green chemistry' solution uses a reversible surfactant that can be activated by carbon dioxide or air, allowing ...
Scientists at the University of Alberta developed a unique coating process to make the sharpest tip known, opening doors to new possibilities in electron microscopy and nanotechnology. The sharp tips can withstand extreme temperatures and enable finer resolution in electron microscopes.
Researchers have found that various bacterial species can form electrically conductive wires under different environmental conditions, leading to a new understanding of microbial energy distribution. The discovery, made by microbiologist Yuri Gorby, suggests that the planet may be 'hard-wired' with electricity-producing bacteria.
Researchers have determined that gallium evens out the uneven bonds between plutonium atoms, leading to a stable high-symmetry cubic structure. The findings shed light on the nature of plutonium and improve confidence in its safety and reliability.
The lecture highlights the evolution of interventional cardiology, from longer procedure times and higher risks of heart attacks to advancements in steerable guidewires, perfusion catheters, and drug-eluting stents. Bioabsorbable stents offer a promising solution by dissolving into carbon dioxide and water once healed.
Researchers at Rice University have made an unexpected plasmonic discovery, finding that terahertz waves slow down as they pass through smaller metal wires. This phenomenon has significant implications for the development of new chemical sensors and endoscopes.
Researchers at Ohio State University found that gamma ray bursts are rare and unlikely to occur near our solar system due to the Milky Way's metal content. The study suggests that GRBs pose no danger to life in our galaxy, dismissing theories of mass extinctions caused by these events.
Researchers at the University of California - Davis have detected lattice solitons in heated uranium crystals using X-ray and neutron scattering experiments. The isolated vibrations play an important role in uranium metal, shedding new light on a previously unknown property of solid materials.
Brookhaven scientists have developed a method to create well-defined nanoparticles of metal compounds for catalytic interest. This new approach, reactive layer assisted deposition (RLAD), enables researchers to understand the atomic structures of these particles and their reactivity on the nano scale.
The TAXUS Express trial showed that paclitaxel-eluting stents reduced restenosis by 40% and cardiac events by 11.5%, compared to vascular brachytherapy. The benefits were achieved without compromising safety, making drug-eluting stents the new standard of care for most patients with restenosis.
A Dartmouth research study confirmed earlier findings that toxic metals like arsenic and lead remain in the top 10 inches of soil after pesticide use. The new study reveals these metals are now part of the fine silt and organic matter, increasing erosion risk to nearby waters.
Scientists from Max Planck Institute and MIT perform atom-by-atom investigations, gaining insight into dynamic fracture instabilities. They propose a new model that explains how material properties affect crack propagation, with implications for understanding fracture in various materials and scales.
Researchers have manipulated hydrogen atoms below the surface of a palladium crystal, creating a structure predicted to be important in fuel cells, metal catalysis, and hydrogen storage. This breakthrough allows scientists to test theoretical predictions and apply data from direct observation.
Scientists have found experimental evidence of quantum chaos in a system with freely dispersing components. The researchers replicated an historical experiment, demonstrating photoelectric effect and observing Ericson fluctuations.
A study found that drug-eluting stents significantly reduce the risk of restenosis in vein grafts, cutting heart attack rates by fourfold compared to bare metal stents. The treatment also decreases repeat procedures and death rates, suggesting a long-term advantage for patients with worn and diseased vein grafts.
Researchers studied gold nanoparticles supported by carbon atoms and found that a large carbon shell can physically squeeze together particles, triggering a merging process. This discovery suggests encapsulating individual metal nanoparticles within carbon shells could prevent uncontrolled size changes in nanoparticle arrays.
Federal, provincial and territorial mines ministers agree that vulnerable mining communities are a priority. The conference discussed ways to maintain community viability through cooperation on exploration initiatives, processing technologies, and Aboriginal engagement.
Researchers have developed diamond-like carbon coatings for medical implants, reducing friction and corrosion while providing biocompatibility. The new method of coating plastics, metals, and collagen enables the production of harder-wearing implants and enhances patient outcomes.
The TAXUS V trial found paclitaxel-eluting stents significantly reduced angiographic restenosis and target vessel revascularization rates. The study's results support the use of these stents for patients with more complex coronary lesions, reducing the risk of artery re-narrowing after angioplasty.
Researchers have designed new cyclic alkyl amino carbenes (CAACs) that enhance stability and efficiency of metal catalysts. These carbene-based catalysts facilitate faster chemical transformations at lower temperatures, reducing costs in pharmaceutical manufacturing.
Researchers at NIST have developed chip-scale refrigerators capable of reaching temperatures as low as 100 milliKelvin, enabling cooling of bulk objects. The solid-state refrigerators have applications in semiconductor defect analysis and astronomical research.
Researchers at Rutgers University develop nanostructured iridium surfaces to extract hydrogen from ammonia, enabling efficient fuel cell operation. The process could contribute to the solution of hydrogen economy's storage and transport obstacles.