Oxygen vacancy-mediated chemiresistor for portable and exclusive room-temperature detection of biomarker gas
Peer-Reviewed Publication
Updates every hour. Last Updated: 15-Dec-2025 16:11 ET (15-Dec-2025 21:11 GMT/UTC)
Highly efficient chemiresistive gas sensors are crucial for numerous applications. Notably, though the generally high working temperature brings fine sensing performance, as well as causing high power consumption, poor safety, and disabled operational stability. Thanks to the cost-effective, simplified structure and integrated diversity, room temperature (RT) operational mode has been put forward and applied in gas sensor devices. However, insufficient limits of detection limit (LOD) and disappointingly long detection time limit their broad applications, meanwhile, the existing sensing mechanism based on the charge transfer between the analyte gas and the oxide surface hampers room temperature gas sensing with low LOD and rapid speed.
Clinical photothermal therapy continues to encounter significant challenges, including systemic toxicity risks associated with intravenous drug administration and inadequate photothermal specificity in the targeted lesion area, particularly concerning the prevention of bone tumor recurrence. To address these issues, this study developed a photothermal functional composite bioceramic scaffold that integrates a Si3N4 matrix known for its excellent antibacterial properties, black glass SiOC exhibiting photothermal characteristics, and bone-inductive graphene oxide (GO). A mapping model was established to correlate the properties of the GO/KH570-H/Si3N4 precursor slurry with the parameters of the SLA additive manufacturing process. Following sintering at 1300 ℃, a GO/SiOC/Si3N4 composite ceramic was successfully obtained. Under irradiation with 808 nm near-infrared light at an intensity of 1 W/cm², the temperature of the leather-coated composite scaffold reached 47.8 ℃ within 10 minutes. This innovative approach presents a promising solution for precise photothermal therapy in postoperative bone tumor repair.
On June 18, 2025, Clarivate released the 2025 Journal Citation Reports™ (JCR™). Eighteen English-language STM journals published by Tsinghua University Press received a Journal Impact Factor (JIF), with 13 (72.2%) journals ranking in the Q1 quartile.
In the field of Large Language Models(LLMs) vertical applications, the innovative direction of deeply integrating foundational LLMs with industrial scenarios has emerged. Researchers have developed an intelligent decision support system for CNC system fault diagnosis, utilizing LLMs and domain knowledge graph(KG) technologies. This advancement effectively overcomes the limitations of typical expert systems in symbolic reasoning efficiency and accuracy. The study, published in Engineering, provides insights and methods for the practical application of industrial large models.
Mystery infections—persistent and unexplained illnesses—are a rising global health challenge, often delaying critical treatment as patients and clinicians search for answers. Today, advanced genetic testing technologies are transforming the landscape, rapidly identifying hidden pathogens and unlocking new pathways for accurate diagnosis and effective intervention.
Photothermoelectric (PTE) photodetectors with self-powered and uncooled advantages have attracted much interest due to the wide application prospects in the military and civilian fields. However, traditional PTE photodetectors lack of mechanical flexibility and cannot operate independently without the test instrument. Herein, we present a flexible PTE photodetector capable of dual-mode output, combining electrical and optical signal generation for enhanced functionality. Using solution processing, high-quality MXene thin films are assembled on asymmetric electrodes as the photosensitive layer. The geometrically asymmetric electrode design significantly enhances the responsivity, achieving 0.33 mA W-1 under infrared illumination, twice that of the symmetrical configuration. This improvement stems from optimized photothermal conversion and an expanded temperature gradient. The PTE device maintains stable performance after 300 bending cycles, demonstrating excellent flexibility. A new energy conversion pathway has been established by coupling the photothermal conversion of MXene with thermochromic composite materials, leading to a real-time visualization of invisible infrared radiation. Leveraging this functionality, we demonstrate the first human–machine collaborative infrared imaging system, wherein the dual-mode photodetector arrays synchronously generate human-readable pattern and machine-readable pattern. Our study not only provides a new solution for functional integration of flexible photodetectors, but also sets a new benchmark for human–machine collaborative optoelectronics.
Conjugated polymers (CPs) have emerged as an interesting class of materials in modern electronics and photonics, characterized by their unique delocalized π-electron systems that confer high flexibility, tunable electronic properties, and solution processability. These organic polymers present a compelling alternative to traditional inorganic semiconductors, offering the potential for a new generation of optoelectronic devices. This review explores the evolving role of CPs, exploring the molecular design strategies and innovative approaches that enhance their optoelectronic properties. We highlight notable progress toward developing faster, more efficient, and environmentally friendly devices by analyzing recent advancements in CP-based devices, including organic photovoltaics, field-effect transistors, and nonvolatile memories. The integration of CPs in flexible sustainable technologies underscores their potential to revolutionize future electronic and photonic systems. As ongoing research pushes the frontiers of molecular engineering and device architecture, CPs are poised to play an essential role in shaping next-generation technologies that prioritize performance, sustainability, and adaptability.
Could the future of clean energy hinge on the spin of a single electron? A new scientific review suggests it might. Researchers are turning to the quantum world—specifically, electron spin—to unlock new possibilities for high-performance electrocatalysts that drive green energy reactions. By fine-tuning how electrons spin within catalyst materials, scientists are finding ways to accelerate reactions such as oxygen reduction, oxygen evolution, carbon dioxide conversion, and nitrogen fixation. The study introduces emerging strategies—from atomic doping to magnetic field modulation—that allow precise control over catalytic behavior. This marks a bold step toward engineering smarter, faster, and more sustainable catalysts for tomorrow’s energy solutions.