Showing 20 articles starting at article 561

< Previous 20 articles        Next 20 articles >

Categories: Chemistry: Inorganic Chemistry, Physics: Quantum Physics

Return to the site home page

     (via sciencedaily.com)     Original source 

Scientists have made a significant stride toward understanding a viable process for direct air capture, or DAC, of carbon dioxide from the atmosphere. This DAC process is in early development with the aim of achieving negative emissions, where the amount of carbon dioxide removed from the envelope of gases surrounding Earth exceeds the amount emitted.

     (via sciencedaily.com)     Original source 

Hydrogen is a building block for the energy transition. To obtain it with the help of solar energy, researchers have developed new high-performance nanostructures. The material holds a world record for green hydrogen production with sunlight.

     (via sciencedaily.com)     Original source 

Friction is hard to predict and control, especially since surfaces that come in contact are rarely perfectly flat. New experiments demonstrate that the amount of friction between two silicon surfaces, even at large scales, is determined by the forming and rupturing of microscopic chemical bonds between them. This makes it possible to control the amount of friction using surface chemistry techniques.

     (via sciencedaily.com)     Original source 

A collaborative research team has discovered a new process for making anhydrides that promises improvements in costs and sustainability.

     (via sciencedaily.com)     Original source 

Long before researchers discovered the electron and its role in generating electrical current, they knew about electricity and were exploring its potential. One thing they learned early on was that metals were great conductors of both electricity and heat. And in 1853, two scientists showed that those two admirable properties of metals were somehow related: At any given temperature, the ratio of electronic conductivity to thermal conductivity was roughly the same in any metal they tested. This so-called Wiedemann-Franz law has held ever since -- except in quantum materials. Now, a theoretical argument put forth by physicists suggests that the law should, in fact, approximately hold for one type of quantum material, the cuprate superconductors.

     (via sciencedaily.com)     Original source 

To ensure that vaccines provide strong and lasting immunization, it is often necessary to supplement the actual vaccine (antigen) with additives that stimulate the immune system: adjuvants. Today, only a few substances have been approved for use as adjuvants. A research team has now introduced a spectrum of potential adjuvants. They started with the immune stimulant ?-glactosyl ceramide (?-GalCer) and synthesized many different variants from a set of four building blocks.

     (via sciencedaily.com)     Original source 

Found in fishing nets, carpet, clothing, Nylon-6 is a major contributor to plastic pollution, including ocean pollution. Now, chemists have developed a new catalyst that quickly, cleanly and completely breaks down Nylon-6 in a matter of minutes -- without generating harmful byproducts. Even better: The process does not require toxic solvents, expensive materials or extreme conditions, making it practical for everyday applications. In experiments, the new process recovered 99% of the polymer's building blocks, which can then be upcycled into higher-value products.

     (via sciencedaily.com)     Original source 

Researchers have developed an AI model that can predict where a drug molecule can be chemically altered.

     (via sciencedaily.com)     Original source 

Researchers discover a new type of ultrafast magnetic switching by investigating fluctuations that normally tend to interfere with experiments as noise.

     (via sciencedaily.com)     Original source 

Used lithium-ion batteries from cell phones, laptops and a growing number of electric vehicles are piling up, but options for recycling them remain limited mostly to burning or chemically dissolving shredded batteries. Researchers have improved on approaches that dissolve the battery in a liquid solution in order to reduce the amount of hazardous chemicals used in the process. This simple, efficient and environmentally-friendly solution overcomes the main obstacles presented by previous approaches.

     (via sciencedaily.com)     Original source 

A new kind of 'wire' for moving excitons could help enable a new class of devices, perhaps including room temperature quantum computers.

     (via sciencedaily.com)     Original source 

Researchers have demonstrated a compact particle accelerator less than 20 meters long that produces an electron beam with an energy of 10 billion electron volts (10 GeV). There are only two other accelerators currently operating in the U.S. that can reach such high electron energies, but both are approximately 3 kilometers long. This type of accelerator is called a wakefield laser accelerator.

     (via sciencedaily.com)     Original source 

Wondering whether whether Dark Matter particles actually are produced inside a jet of standard model particles, led researchers to explore a new detector signature known as semi-visible jets, which scientists never looked at before.

     (via sciencedaily.com)     Original source 

Experiments have provided the first direct evidence that electricity seems to flow through 'strange metals' in an unusual liquid-like form.

     (via sciencedaily.com)     Original source 

Researchers have devised a way to produce chemicals used in medicine and agriculture for a fraction of the usual cost. Using oxygen as a reagent and copper as a catalyst to break organic molecules' carbon-carbon bonds and convert them into amines, which are widely used in pharmaceuticals. Traditional metal catalysis uses expensive metals such as platinum, silver, gold and palladium, but the researchers used oxygen and copper -- an abundant base metal.

     (via sciencedaily.com)     Original source 

Researchers create transistors combining silicon with biological silk, using common microprocessor manufacturing methods. The silk protein can be easily modified with other chemical and biological molecules to change its properties, leading to circuits that respond to biology and the environment.

     (via sciencedaily.com)     Original source 

Hopfions, magnetic spin structures predicted decades ago, have become a hot and challenging research topic in recent years. New findings open up new fields in experimental physics: identifying other crystals in which hopfions are stable, studying how hopfions interact with electric and spin currents, hopfion dynamics, and more.

     (via sciencedaily.com)     Original source 

Glass is a fundamental material. Yet its atomic structure still baffles scientists to this day. Researchers have developed a new way to quantify ring shapes in chemically bonded networks of glass, chipping away at some of the mysteries behind glass's atomic structure.  

     (via sciencedaily.com)     Original source 

Global measurements and model calculations show that the complex relationship between the chemistry and climate impact of aerosol particles can be successfully captured by a simple formula.

     (via sciencedaily.com)     Original source 

Quantum scientists have discovered a rare phenomenon that could hold the key to creating a 'perfect switch' in quantum devices which flips between being an insulator and superconductor.