How does gold keep its glitter? Tulane University researchers uncover why it resists tarnish
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Updates every hour. Last Updated: 30-May-2026 12:16 ET (30-May-2026 16:16 GMT/UTC)
Gold has been prized for thousands of years for its enduring shine, but Tulane University researchers have discovered that gold’s resistance to tarnishing depends on more than its chemistry. In a new study published in Physical Review Letters, researchers found that atoms on certain gold surfaces naturally rearrange themselves into protective patterns that dramatically suppress reactions with oxygen.
The mechanism of high-temperature (TC) superconductivity is a key challenge in condensed matter physics. Recently, Chinese scientists made significant progress in the study of high-TC nickelate superconductors.
For the first time, scientists observed a nodeless superconducting gap and discovered electron-boson coupling by measuring the electronic structures of Ruddlesden-Popper bilayer nickelate superconducting thin films. These results provide crucial evidence for two fundamental issues in the mechanism of high-TC nickelates: “superconducting gap symmetry” and “superconducting pairing mechanism”.
Since their discovery in the 1950s, metallocenes — chemical compounds where a metal atom sits ‘sandwiched’ between two carbon rings — have been at the heart of organometallic chemistry research, finding applications in catalysis, materials design, energy, sensing, drug delivery and more. Yet knowledge of their formation has been limited, due to the transient nature of their unstable intermediates.
Published in the Journal of the American Chemical Society (JACS), researchers from the Okinawa Institute of Science and Technology (OIST) have reported the first full structural characterization of a doubly ring-slipped reaction intermediate in the formation of a metallocene. With its unusual structure, the characterization provides new evidence of how metallocenes may form, break and react, presenting design opportunities for stimuli-responsive, metallocene-based materials for a wide variety of potential applications.
A new international study, published in Science Advances, fully accounts for what is driving the world's rising oceans over six decades.
NIMS discovered a phenomenon in which droplets on a single solid surface exhibit both "sticky" and "repellent” state simultaneously; namely, the wetting behavior branches into two states. This is a discovery that overturns interface chemistry scientists' belief held for over 200 years that, on a non-textured surface, wetting state is uniquely determined by solid/liquid combinations. Furthermore, the research team also clarified a universal surface design principle that causes this phenomenon. This research result was published in Advanced Materials Interfaces on April 2, 2026.