Multiple Exceptional Rings in One-Dimensional Perovskite Photonic Crystals.

Exceptional rings (ERs) are high-dimensional non-Hermitian topologies formed by exceptional points, significantly enriching the topological properties of non-Hermitian systems. Because of the intricate topology and symmetry requirements, the realization of ERs generally demands complex structures and precise parameter tuning, resulting in relatively few experimental observations in high-dimensional periodic systems. Here, we show that even the simplest 1D non-Hermitian periodic systems can support multiple ERs, enabled by the system's multiple degrees of freedom which naturally accommodate diverse non-Hermitian perturbations.

Multilayer metal-organic frameworks-based artificial cytoskeleton for boosting immunosensors performance.

Artificial cytoskeletons are constructed to study the structure and function of eukaryotic cells. Metal-organic frameworks (MOFs) provide a strong foundation for the construction of artificial cytoskeleton by encapsulating enzyme, yet challenges such as random enzyme distribution and poor catalytic efficiency, impede the development of artificial cytoskeleton technologies. Herein, a multilayer MOFs-based programmable artificial cytoskeleton was constructed through a heterogeneous interfacial growth method, utilizing hierarchical encapsulation of enzymes to facilitate tandem biocatalytic reactions.

Room Temperature Flexible Gas Sensor Based on MOF-Derived Porous Carbon Skeletons Loaded with ZnO Nanoparticles and DMF Detection.

Overcoming the persistent challenges of high operating temperatures and poor selectivity in metal oxide semiconductor (MOS) gas sensors, this work enhances defect sites in the sensing material through heterostructure construction and builds mesoporous architectures using MOF-derived carbon skeletons as templates. The synergistic effects of multiple mechanisms significantly improve gas-sensing performance, successfully fabricating a ZnO/PCS flexible room-temperature gas sensor with exceptional room-temperature DMF detection capabilities. The nitrogen-containing porous carbon skeletons (PCSs) template shows a stable mesoporous microstructure with large pore volume.

On-chip near-infrared gas sensing based on slow light mode multiplexing in photonic crystal waveguides.

Photonic crystal slow light waveguides present a breakthrough in the manipulation of optical signals and enhancing the interaction between light and matter. In particular, two-dimensional (2D) photonic crystal waveguides (PCWs) on silicon photonic chips hold promise in improving the sensitivity of on-chip gas sensors. However, the development of the gas sensors based on 2D PCWs suffers from a high propagation loss and a narrow slow light bandwidth.

A Room-Temperature Diradical-Based High-Spin Qubit.

Organic luminescent diradicals have recently attracted more attention for their potential applications in quantum science. Here, we have investigated the spin dynamic properties of two solid-state Müller- and Chichibabin-type Kekulé diradicals featuring different distances between two radical centers. The continuous-wave EPR (cw-EPR) together with echo-detected field-swept spectrum (EDFS) prove the existence of a thermally accessible triplet state at room temperature, promising a potential candidate for quantum manipulation as a high-spin state.

Low-Rh/MoC/N-doped carbon nanofibers as robust bifunctional electrocatalyst for hydrazine oxidation-assisted H generation and Zn-hydrazine battery.

Replacing the sluggish anodic oxygen evolution reaction (OER) with thermodynamically favorable hydrazine oxidation reaction (HzOR) constitutes a transformative approach for advancing energy-efficient hydrogen (H) production. Herein, we fabricate Rh nanoparticles anchored on MoC/N-doped carbon nanofibers (MoC/NCNFs) as a bifunctional electrocatalyst for simultaneous HzOR and hydrogen evolution reaction (HER). Through optimizing Rh loading, the MoC/NCNFs-6Rh catalyst achieves a record-low potential of -0.

Incorporation of Cu within the ligand cavities of porphyrin-based MOFs for enhanced nonlinear optical performance.

Metal-organic frameworks (MOFs) constructed with porphyrins as organic ligands have attracted considerable attention due to their excellent nonlinear optical (NLO) properties. Developing innovative synthetic strategies and structural designs to improve the NLO response of porphyrin-based MOFs has become a prominent research area. In this paper, HTCPP MOF and CuTCPP MOF were synthesized by hydrothermal method with Co as metal node, and HTCPP and CuTCPP as ligands, respectively.

Temperature Control Method for Electric Heating Furnaces Based on Auto-Encoder and Fuzzy PI Control.

Electric heating furnaces are widely used in industrial production and scientific research, where the quality of temperature control directly affects product performance and operational safety. However, precise control remains challenging due to the system's nonlinear behaviour, time-varying characteristics, and significant time delays. To overcome these issues, this paper proposes a composite control method that integrates an auto-encoder-based prediction model with fuzzy PI control.

Polarization-Sensitive Photodetector Based on WSe/AsP/WS Heterojunction.

The rapid advancements in optoelectronics and their widespread applications have spurred the development of high-performance photodetectors. This study presents a dual-van der Waals heterostructure photodetector, composed of WSe, AsP, and WS. It demonstrates outstanding polarization-sensitive light detection without external bias, with a sensitivity of 487 mA/W, a detection capability of 6.

Efficient luminescent stable Chichibabin diradicaloid for near-infrared imaging and photothermal therapy.

Diradicaloids have garnered significant attention due to their unique electronic, photophysical properties and potential applications in functional materials. Characterized by a narrow band gap and near-infrared (NIR) absorption, diradicaloids are promising candidates for NIR-guided photothermal therapy. However, they are often unstable and exhibit non-emissive properties due to high chemical reactivity and very efficient internal conversion.

Synthesis of Perovskite Nanowires and Their Application for Photodetectors.

1D nanowires (broadly including microwires and quantum wires) of metal halide perovskites exhibit several unique properties due to their distinctive morphology, such as enhanced responsivity under weak light, mechanical flexibility, and optical anisotropy. These perovskite nanowires can be readily fabricated into lateral devices as photoconductive photodetectors. Herein, the synthesis of perovskite nanowires and their applications for photodetectors are primarily focused on, providing an overview of the major synthesis strategies for perovskite nanowires (and arrays) since their initial reports, and analyzing how structural design and modification strategies can improve the performance of nanowire-based devices.

Dual-Mode, Self-Powered, and Flexible Humidity Sensor Based on Double-Network Hydrogel with Multifunctional Applications.

High-performance and multifunctional humidity sensing have received wide attention in recent years. However, the problem is that sensors with a single signal output and requiring an external power source restrict their further application. Herein, a high-performance dual-mode, self-powered, and flexible humidity sensor is proposed based on a double-network functional ionic hydrogel via a hydrogen bond-rich strategy, resulting in stable humidity sensing performance under different bending states.

Innovative SIFSIX-1-Cu-based microwave sensor with directionally ordered interconnected nanochannels: Revolutionizing high-performance SO detection.

SO sensors generally face challenges such as gas corrosion, poor selectivity, competition from water molecules, and high recovery costs. Metal-organic frameworks (MOFs), which offer excellent chemical stability, structural diversity, and low-cost reactivation, have emerged as ideal candidates for sensing materials. However, MOFs typically exhibit poor conductivity, making them unsuitable for traditional gas detection devices.

Modulation of the Surface Catalytic Activity of Boron-Doped Cobalt Oxide with Crystalline/Amorphous Interfaces for High-Stability Acetone Detection.

Enhancing the gas-solid interface interaction between sensing materials and O is promising for the development of high-performance metal oxide-based chemiresistive gas sensors. Nevertheless, high-performance gas sensors have not been developed owing to the lack of a deep understanding of the sensing mechanism with regards to gas-solid interface interactions. In this study, boron-doped cobalt oxide (B-CoO) with crystalline/amorphous interfaces was synthesized for acetone detection.

Quantum-Dots Light-Emitting Devices Based on Exciton Harvesting Layers.

Quantum dot light-emitting diodes (QLEDs) have emerged as a promising technology for display and lighting applications due to their high color purity, tunable emission wavelengths, and solution processability. However, carrier imbalance arising from differences in injection barriers and mobilities between electrons and holes remains a significant challenge, leading to charge accumulation or leakage and resulting in performance losses. To address these issues, exciton harvesting layers (EHLs) have recently gained attention as an effective and targeted strategy.

Polyoxometalate-Based Self-Healing Photochromic Smart Windows for Excellent Solar Heat Management.

With the increasing global demand for energy efficiency solutions, smart windows capable of controlling excess solar radiation and reducing electric energy usage have emerged as promising options and are undergoing substantial development. However, the use of smart windows is constrained by limitations associated with temperature regulation capabilities and damage upon accidental scratches. To overcome these obstacles, we introduce a method for creating transparent self-healing photochromic coatings by simply alternately depositing polyethylenimine (PEI)-polyoxometalate (POM) complexes and poly(acrylic acid) (PAA) on glass substrates.

Spin-Correlated Luminescence Enabled by Bright-Dark Radical Pairing in a Diradical System.

Spin-optical modulation lies at the core of emerging technologies in spintronics, spin-based optoelectronics, and quantum materials. Open-shell luminescent diradicals, featuring two unpaired and synthetically tunable spins, offer a molecular platform to achieve such control. However, previous studies have been restricted to symmetric systems, where spin interactions occur between two identical, luminescent radicals.

Stable Luminescent Radicals with Efficient Through-Space Charge-Transfer Emission.

High-performance luminescent radicals featuring donor-radical (D-R) charge-transfer (CT) excited states have emerged as promising candidates for optoelectronic applications. However, prior studies have predominantly focused on through-bond charge-transfer (TBCT) mechanisms. In this work, we report the first examples of luminescent radicals based on TTM (tris(2,4,6-trichlorophenyl)methyl radical) with through-space charge-transfer (TSCT) excited states, represented by TPA-FR-TTM and CZP-FR-TTM.

Ultrafast Modulation of Stacking Orders in vdW Layers by Photoinduced Pseudosliding of Ferroelectric Monolayer.

Precise control of stacking orders in van der Waals (vdW) heterostructures not only generates novel quantum phenomena but also promises applications in memory and computing devices. However, achieving robust control of the stacking order in vdW heterostructures remains a significant challenge. In this work, TDDFT-MD simulations reveal a photoinduced ultrafast and nonvolatile in-plane structural transition in ferroelectric antimonene.

Highly Sensitive Perovskite Nanowire Photodetectors Enabled by Surface State Engineering for Non-Contact Heart Rate Monitoring.

Non-contact heart rate detection is essential in health monitoring, emphasizing the need for highly sensitive photodetectors to ensure accurate measurement. Nanowire photodetectors, benefiting from surface states, exhibit excellent performance. However, the distribution and charge-trapping capability of these surface states are primarily dictated by the intrinsic material properties, limiting tunability.

Reconfigurable non-Abelian integrated photonics.

Current integrated photonics typically utilizes the dynamical phase associated resonant on-chip components, leading to bandwidth-limited devices with perturbation-sensitive performance. Multi-mode geometric phase matrix, arising from the non-Abelian holonomy which is a non-resonant and global effect, has been recently introduced to integrated photonics for the design of broadband and robust on-chip photonic devices. Achieving reconfigurable on-chip non-Abelian photonic devices is a crucial step towards practical applications, which however remains elusive.

Single-Site Metal-Nonmetal Microenvironment Regulation of Copper Nanoclusters with Atomic Precision for X-Ray Imaging.

The intramolecular microenvironment regulation in metal nanoclusters has typically occurred with the same attribute factors-like metal-to-metal or ligand-to-ligand control-while the regulation with different-attribute factors, e.g., from metal to nonmetal, remains challenging, not to mention the different-attribute microenvironment regulation at the single-site level.

Pyrrole-Modified Two-Dimensional Carbon Nitride Nanoparticles Realize Super-Resolution Imaging.

Graphitic carbon nitride (g-CN), as an excellent optoelectronic material, has potential applications in bioimaging. However, the original g-CN has an excessively large size and poor water solubility and is difficult to modify, making it unsuitable for direct use in bioimaging. Here, we propose an efficient modification scheme.

Parallel writing of 5D optical data via shaped voxels.

Multidimensional optical data storage is a critically needed technology in the digital era. To overcome the low data writing rate in the conventional systems, we present a parallel five-dimensional optical data writing method by projecting arrays of depth-resolved voxels of different shapes via a digital micromirror device and temporally focusing a femtosecond laser amplifier. This is more efficient than the conventional approach that serially creates birefringent voxels in glass (e.

Impact of Competency-Based Education and Multidisciplinary Team Teaching for Standardized Training Resident on Radiation Oncology.

Radiation oncology is a pivotal discipline in cancer management, requiring the integration of clinical expertise and technical skills. Traditional methods often fall short in fostering essential competencies such as interdisciplinary collaboration and problem-solving. This study evaluated the effectiveness of competency-based education (CBE) combined with multidisciplinary team (MDT) teaching in improving hospital standardized training trainees' academic performance and clinical competencies during their radiation oncology rotations.