SwRI-led study demonstrates PUNCH’s potential to improve space weather forecasts
Reports and Proceedings
Updates every hour. Last Updated: 27-Oct-2026 05:16 ET (27-Oct-2026 09:16 GMT/UTC)
Researchers have developed realistic skin-mimicking models that could help improve the accuracy of optical medical devices and wearable sensors across a wider range of skin tones. The multilayer silicone phantoms incorporate artificial blood vessels and simulated blood flow, enabling controlled testing of technologies such as pulse oximeters. The team found that coffee more closely replicated the optical properties of skin pigmentation than commercial skin-tone pigments, producing reflectance spectra of multi-layered phantoms that better matched human skin. Imaging experiments showed that darker pigmented layers increasingly masked signals from underlying blood vessels, reflecting a known challenge for light-based health measurements. The durable phantoms may provide a valuable tool for reducing skin-tone-related bias in the development and evaluation of optical healthcare technologies.
Temperature is a fundamental physical quantity. With the rapid development of stretchable electronics, transparent stretchable temperature sensors are in critical demand. However, performance retention under strain is a great challenge, and the influence of the electrode on the sensing performance is rarely reported.
A self-powered blue photodetector based on WS2:Ag nanocomposites with Au/graphene asymmetric electrodes is reported. The localized surface plasmon resonance of Ag nanoparticles synergizes with high-energy excitons in WS2, enhancing near-field absorption and hot-electron injection. Transient absorption spectroscopy reveals that the built-in electric field facilitates rapid carrier separation. Under zero bias, the device delivers a responsivity of 244 mA/W and an external quantum efficiency of 74.7%. It further demonstrates high-resolution (128 × 128) single-pixel imaging in both clear and turbid water, achieving a peak signal-to-noise ratio of 25.5 dB. This work offers a viable strategy for low-power underwater optical communication and high-visibility imaging.
Researchers have developed a breakthrough tandem electrode structure that integrates both anodic (NiO) and cathodic (W18O49) electrochromic materials onto a single substrate. By inserting a conductive ITO interlayer, the team successfully overcame the common problem of material interference, significantly speeding up response times and enhancing coloration efficiency. This innovation allows smart windows to switch seamlessly between transparent, brown, and blue states, providing dynamic control over both visible light and heat-producing near-infrared radiation for more energy-efficient buildings.
Violet phosphorus is a promising layered semiconductor, but its intrinsic charge-transport behavior has remained difficult to determine because device interfaces can strongly affect measurements. Researchers synthesized high-quality single-crystalline violet phosphorus by chemical vapor transport and fabricated van der Waals heterostructure field-effect transistors using full h-BN encapsulation and van der Waals graphite or pre-patterned bottom contacts to minimize fabrication-induced interface damage. The devices exhibited robust unipolar n-type conduction, ohmic-like output behavior, current on/off ratios approaching 10⁷ and ambient stability for more than 200 days, clarifying the inherent transport nature of violet phosphorus.