This study initiatively developed the phosphor-free LED lamp based on high-efficiency yellow LED, and explored the photo-biological effects of yellow-green spectrum. Analyzing multiple ocular physiological parameters, cortical functional connectivity, and melatonin secretions at various moments, the authors demonstrated the positive photo-biological effects of yellow-green-rich phosphor-free LED lamp. This study revealed the spectral regulation mechanism and the intrinsic mathematic model of human physiological response, applicable in the fields of health-oriented lighting and displays.

UCLA and Broadcom researchers introduced the design and fabrication of a broadband, polarization-insensitive unidirectional imager operating in the visible spectrum. This device was fabricated through wafer-scale lithography on high-purity fused silica, offering high optical transparency, thermal stability and ultra-low loss. This work marks the first wafer-scale multilayer diffractive processor designed for visible imaging, enabling scalable, high-throughput production for advanced applications such as intelligent imaging, optical sensing, privacy protection, and all-optical information processing.

A research team led by Professor Sung Hoon Kim from the School of Electrical and Computer Engineering at Korea University has developed the world’s first alginate-based microrobot that can be tracked using Magnetic Particle Imaging (MPI). The newly developed system marks a major milestone in microrobotics by enabling real-time localization, selective thermal therapy, and cell delivery—all powered and controlled through a single magnetic actuation system, completely independent of conventional medical imaging devices such as cameras, CT, or X-ray machines.

Biochar, hailed as a climate change mitigation tool for its ability to reduce greenhouse gas emissions, may not be as effective as once thought when microplastics are in the picture. A new study investigates how polyethylene microplastics interact with aged biochar to affect carbon and nitrogen stability in Fluvic Cambisol soil, offering surprising results.

The development of efficient electrocatalysts for saline water oxidation (SWO) is imperative for advancing seawater splitting technology to produce green hydrogen. In this work, a NiFe-Co₂(OH)₃Cl material was developed as pre-electrocatalyst for both active and stable SWO. During catalysis, the hydroxyloride was converted to oxyhydroxide with 35.4% enlarged ECSA, leading to the enhanced intrinsic activity (300 mV@10 mA cm^-2, 49.9 mV decade^-1). Moreover, the electrolyte Cl^- would be incorporated to the catalyst lattice, thus improving the corrosion-resistance of the material, resulting in the high electrocatalytic stability for 100 h.

The utilization of blue lasers to excite phosphor materials holds great potential for the development of high-brightness laser-driven light sources. However, phosphor materials that can simultaneously constrain light spot expansion and enhance maximum luminous flux have been elusive, thereby limiting output luminance. This study presents a significant strategy to address the inherent trade-off between light spot confinement and luminous flux maximization in light sources through the design of core-cladding-like phosphor ceramics (CCPC) wafers. The YAG:Ce@Al₂O₃ CCPC wafer design effectively confines the light spot to an area as small as 0.53 mm² while achieving an ultra-high luminance of 3900 lm·mm⁻². This research presents a pioneering approach to the design of phosphor materials, targeting the realization of light sources with unprecedented luminance for broad frontier applications.

Microwave dielectric ceramics, as core materials for passive electronic components, are widely used in filters, dielectric antennas, and microwave communication systems. In high-frequency applications, ceramics with a low dielectric constant (ε_r) are preferred for their ability to reduce signal latency and simplify passive device fabrication. Ideal microwave dielectric ceramics should exhibit a near-zero temperature coefficient of resonant frequency (τ_f) and a high quality factor (Q×f, i.e., low dielectric loss tanδ = 1/Q). However, achieving ultra-low dielectric loss, high Q×f, and near-zero τ_f simultaneously remains a significant challenge. Olivine-type A₂BO₄ ceramics, with low ε_r (<10) and high Q×f (>100,000 GHz), offer exceptional low loss and high efficiency in high-frequency signal transmission, presenting broad prospects for next-generation wireless communications. Nevertheless, achieving a near-zero τ_f remains a critical challenge in this field.

Osteogenesis imperfecta (OI) refers to a group of bone disorders in which certain genetic mutations affect the formation of healthy bones. In a new study, researchers have developed a novel mouse model bearing a substitution mutation at position 342 in the specificity protein 7 (Sp7) gene. Utilizing this model, they investigated the role of mature bone cells called osteocytes in OI and clarified the associations between impaired bone remodeling and osteocyte dendrite defects.