Professor Jiawen Chen and Associate Researcher Yan Wang from South China Normal University, in collaboration with Professor Ben L. Feringa's team at the University of Groningen, Netherlands, designed a novel molecular machine with both rotational and shuttle motion modes. This molecular machine combines a sterically hindered olefin molecular motor, an H-type benzimidazole, and a crown ether system, achieving for the first time the control of rotaxane shuttle motion through the rotational motion of the molecular motor. The motion mechanism of this molecule was elucidated in detail using methods including two-dimensional proton NMR spectroscopy and theoretical calculations. This work demonstrates the tuning effect of two different motion modes within a single molecular machine, providing a solid experimental foundation for the future design of multifunctional molecular machines with complex mechanical functions. The article was published as an open access Research Article in CCS Chemistry, the flagship journal of the Chinese Chemical Society.

Auburn University physics PhD student Jessica Eskew has been awarded a prestigious U.S. Department of Energy Office of Science Graduate Student Research Fellowship to tackle one of the most critical challenges in fusion energy: controlling runaway electrons that can damage future fusion power plants. Through extended on-site research at the DIII-D National Fusion Facility, Eskew will study how precisely manipulating magnetic structures in hot plasmas can enable safer, more reliable fusion devices, reinforcing Auburn Physics’ growing national impact in plasma and fusion research.

Quantum mechanics describes a microscopic world in which particles exist in a superposition of states—being in multiple places and configurations all at once, defined mathematically by what physicists call a 'wavefunction.' But this runs counter to our everyday experience of objects that are either here or there, never both at the same time. Typically, physicists manage this conflict by arguing that, when a quantum system comes into contact with a measuring device or an experimental observer, the system’s wavefunction ‘collapses’ into a single, definite state. Now, with support from the Foundational Questions Institute, FQxI, an international team of physicists has shown that a family of unconventional solutions to this measurement problem—called ‘quantum collapse models’—has far-reaching implications for the nature of time and for clock precision. They published their results suggesting a new way to distinguish these rival models from standard quantum theory, in Physical Review Research, in November 2025.

Scientists have created a fingertip‑scale spectrometer‑on‑a‑chip that brings lab‑grade hyperspectral sensing into the near‑infrared range long considered out of reach for silicon. By engineering photon‑trapping textures onto silicon photodiodes and using a neural network to decode their combined signals, the device accurately reconstructs spectra from 640 to 1100 nanometers—well beyond the limits of conventional silicon spectrometers. Despite its tiny 0.4‑mm footprint, the chip delivers ~8‑nm resolution, maintains high accuracy with fewer than 16 detectors, and remains stable even under heavy electronic noise. The team also demonstrated precise hyperspectral imaging of a butterfly dataset, highlighting the technology’s potential for compact biomedical, environmental, and remote‑sensing tools.

University of Chicago and Northwestern University researchers have turned the conditions that accidentally degrade battery components into a new, powerful technique for intentionally destroying the water pollutants known as per- and polyfluoroalkyl substances, or PFAS. Their results, published today in Nature Chemistry, showed 94% defluorination and 95% degradation in breaking down the long-chain PFAS molecule perfluorooctanoic acid (PFOA) into mineralized fluorine without forming short molecular chains that can be even tricker to remove from water. This new fluorine source can be used to create PFAS-free compounds, turning pollutants into valuable commercial products. Of 33 PFAS compounds tested, 22 demonstrated degradation amounts exceeding 70%, with some degradation up to 99%, showing remarkable promise as electrochemistry enters the fight against "forever chemicals."

SPIE, the international society for optics and photonics, is celebrating the inaugural Biophotonics Discovery's Impact of the Year Award as well as its first recipient, Stanford University Associate Professor of materials science and engineering, Guosong Hong. Hong was officially honored at the Biophotonics Focus: Light-Based Technologies for Reproductive, Maternal, and Neonatal Health plenary during SPIE Photonics West on Sunday evening.

For years, researchers have provided contradictory evidence about the “premelting film” of ice, its thickness and whether it even exists. In The Journal of Chemical Physics, Luis MacDowell sought to resolve this contention. He focused on the phase diagram of ice and, using computer simulations, visualized the movements of molecules at the surface. At the triple point, where all three phases are equally stable, a nanometer-thin film appeared. MacDowell proposes that much of the disagreement is due to experiments that unintentionally occur slightly away from equilibrium.

One of the primary challenges with prosthetic hands is the ability to properly tune the appropriate grip based on the object being handled. In Nanotechnology and Precision Engineering, researchers in China have developed an object identification system for prosthetic hands to guide appropriate grip strength decisions in real time. Their system uses an electromyography sensor at the user’s forearm to determine what the user intends to do with the object at hand.