A new type of catalyst—a material that speeds up chemical reactions—that could make the production of clean hydrogen fuel more efficient and long-lasting has been developed by a team led by City University of Hong Kong, ...
Analytical Chemistry
Sep 18, 2025
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3
A NIMS research team has developed a magnetic tunnel junction (MTJ) featuring a tunnel barrier made of a high-entropy oxide composed of multiple metallic elements. This MTJ simultaneously demonstrated stronger perpendicular ...
Condensed Matter
Sep 9, 2025
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13
Imagine a child with eczema who scratches a patch of irritated skin. A tiny opening forms, invisible to the eye. Into that breach slips a common bacterium, Staphylococcus aureus.
Cell & Microbiology
Sep 3, 2025
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22
University at Albany chemists have created a new high-energy compound that could revolutionize rocket fuel and make space flights more efficient. Upon ignition, the compound releases more energy relative to its weight and ...
Space Exploration
Aug 27, 2025
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58
Hydrogen peroxide (H2O2) packs so much chemical energy into a small space that it is powerful enough to fuel rockets. But this same ability to concentrate energy also makes hydrogen peroxide useful for more earthly energy ...
Analytical Chemistry
Aug 19, 2025
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14
A new method to convert carbon dioxide (CO2) into ethylene using significantly less energy than existing approaches could help cut emissions from one of the world's most carbon-intensive manufacturing processes.
Materials Science
Jul 31, 2025
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24
Crystallization, a fundamental process in nature, hinges on two distinct stages: nucleation and growth. The latter plays a pivotal role in shaping the morphology, size, and purity of crystalline materials, making it a focus ...
Nanophysics
Jul 29, 2025
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8
Creating complex structures at the tiniest scales has long been a challenge for engineers. But new research from Georgia Tech shows how electron beams, already widely used in imaging and fabrication, can also be used as ultra-precise ...
Nanophysics
Jul 25, 2025
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3
A research team led by Linda Zhang at Tohoku University has developed a novel metal-organic framework (MOF) that enables record-breaking separation of hydrogen isotopes, achieving a D2/H2 selectivity of 32.5 at 60 K.
Materials Science
Jul 23, 2025
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1
A new method turns noise into valuable data to enhance understanding of chemical reactions and material properties with unprecedented detail at the atomic level. The results of this research are now published in Nature.
General Physics
Jul 16, 2025
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7
In quantum mechanics, perturbation theory is a set of approximation schemes directly related to mathematical perturbation for describing a complicated quantum system in terms of a simpler one. The idea is to start with a simple system for which a mathematical solution is known, and add an additional "perturbing" Hamiltonian representing a weak disturbance to the system. If the disturbance is not too large, the various physical quantities associated with the perturbed system (e.g. its energy levels and eigenstates) can, from considerations of continuity, be expressed as 'corrections' to those of the simple system. These corrections, being 'small' compared to the size of the quantities themselves, can be calculated using approximate methods such as asymptotic series. We can therefore study the complicated system based on our knowledge of the simpler one.
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