Yonsei University researchers have provided new experimental evidence for electronic rotons and their connection to Wigner crystallization in a two-dimensional system. Using angle-resolved photoemission spectroscopy on alkali-metal-doped black phosphorus, their studies demonstrate that these rotons play a role in triggering the self-organization of electrons into ordered arrays. These findings contribute to the understanding of strongly correlated electron phenomena and the behavior of novel quantum materials.

Can you imagine having a smartphone with a wooden touchscreen? Or a house with wooden windows? Probably not — unless you’ve heard of transparent wood. Made by modifying wood’s natural structure, this material has been proposed as a sturdy, eco-friendly alternative for plastic. Researchers have created proof-of-concept transparent woods using almost entirely natural materials, and have explored making them electrically conductive, too. The researchers will present their results at ACS Spring 2025.

Drugstores and makeup counters carry foundations in various olive, ivory and fair shades. But for people with darker skin tones, finding the right foundation shade can be a challenge. The darker foundations that exist often fall flat, appearing gray-like once applied on the skin. But now, researchers report a blue cosmetic color additive that gives darker foundations the warmth and depth that current foundations lack. The researchers will present their results at ACS Spring 2025.

Lithium-ion batteries, used in consumer devices and electric vehicles, typically last hours or days between charges. However, with repeated use, they degrade and need to be charged more frequently. Now, researchers are considering radiocarbon as a source for safe, small and affordable nuclear batteries that could last decades or longer without charging. The researchers will present their results at ACS Spring 2025.