SCIENCE CHINA Materials•2026•DOI: 10.1007/s40843-025-3582-9
Perovskite quantum dots (PQDs) hold great potential for brain-like neuromorphic computing. However, the development of PQDs-based synaptic devices is hindered by interfacial defects and limited stability. Here, we demonstrate a high-performance Cs2AgBiBr6 QDs/organic single crystal heterojunction synaptic device, fabricated via a novel space-confined vertical growth technique combined with a polymer-free transfer process. Vertically grown organic single crystals enable superior carrier mobility and facilitate the formation of low-defect interfaces with PQDs. The heterojunction exhibits remarkable photosensitivity (7.22 × 10^5 at 425 nm) and detectivity (2.15 × 10^15 Jones), owing to the strong optical absorption of PQDs coupled with the superior charge transport characteristics of organic single crystals. Notably, the device achieves dual-functional light adaptation, emulating synaptic behaviour under blue light while exhibiting photo-switching under green/red light. This unique capability enables smart blue-light hazard protection. This work not only provides a versatile platform for high-performance PQDs-based synaptic devices but also advances the development of brain-inspired neuromorphic systems for next-generation computing and intelligent sensing.
Environmental Chemistry•2026•DOI: 10.7524/j.issn.0254-6108.2025021005
Microplastic pollution in freshwater environments has escalated, leading to increased accumulation in wild fish. This study investigated the occurrence characteristics of microplastics (MPs) in the gills, gastrointestinal tract (GIT), and muscle of four wild fish species with different feeding habits from Baiyangdian Lake, China. MPs were detected in all tissues. The average abundance was highest in the GIT (11.63 ± 10.76 items/individual), followed by gills (7.44 ± 6.79 items/individual), and lowest in muscle (3.91 ± 3.16 items/individual). The majority of MPs were transparent and black fibers smaller than 0.5 mm. Polymer analysis identified polypropylene (PP) and polyethylene (PE) as dominant components. Significant differences in MP abundance were observed among species, with carnivorous and herbivorous fish (e.g., snakehead and grass carp) showing higher total MPs than omnivorous and planktivorous fish (e.g., mosquitofish and topmouth gudgeon). However, when normalized by body weight, smaller fish exhibited higher MP concentrations in the GIT, suggesting a greater risk per unit mass. This study provides baseline data on tissue-specific MP distribution in wild freshwater fish with varying feeding behaviors and habitats, highlighting the influence of trophic level and body size on MP accumulation.
Journal of Environmental Engineering Technology•2026•DOI: 10.13205/j.hjgc.202608021
To address the significant increase in fine particulate matter (PM2.5) and its chemical component concentrations caused by the concentrated setting-off of fireworks and firecrackers during the Spring Festival in Yancheng City, this study introduced the Bayesian-optimized XGBoost model (BO-XGBoost) based on PM2.5, particulate component, and meteorological observation data. The model simulated non-setting-off baseline concentrations using meteorological factors as independent variables, enabling quantitative assessment of setting-off contributions. Results showed that the concentrated setting-off exerted significantly differentiated effects on various pollutants. Among water-soluble ions, K+ and Mg2+ were core characteristic tracers, with concentrations reaching 15.89 and 20.08 times baseline levels on Lunar New Year's Eve, directly reflecting high-intensity emissions. Secondary conversion ions such as SO4^2- and NO3^- showed sustained high contributions on both Lunar New Year's Eve and the fifth day of the first lunar month, reflecting cumulative effects of atmospheric chemical transformation. Among inorganic elements, K, Ba, and Sr were core characteristic tracers, with concentrations showing explosive growth on Lunar New Year's Eve, serving as direct fingerprints of fireworks. Elements such as Pb and Mn were also significantly affected, reflecting direct heavy metal emissions. Temporal comparisons indicated that emission intensity on Lunar New Year's Eve was significantly higher than on the fifth day, with increased proportional contribution of secondary conversion processes on the fifth day. The study achieved accurate quantification of setting-off contributions through a data-driven model, clarifying pollution fingerprint characteristics and temporal differentiation patterns, providing scientific basis for air quality management and policy optimization during the Spring Festival.
SCIENCE CHINA Materials•2026•DOI: 10.1007/s40843-025-4009-0
Micro light-emitting diode (Micro-LED) display technology is a promising next-generation display technology due to its high brightness, high contrast, low power consumption, long life, and fast response. However, aggressive downscaling of Micro-LEDs to a few microns makes lift-off fabrication of metal bumps for soldered joints between Micro-LEDs and driver substrates increasingly difficult, challenging high-yield bump arrays under high-density conditions. This study innovatively replaces conventional metal bumps with a photosensitive conductive polymer (PCP), enabling fabrication of polymeric micro-bump arrays via well-established photolithography, bypassing complex lift-off processes and reducing short-circuit risk. Isopropyl alcohol regulates developer wettability for optimal development, yielding bump arrays with bump size 20 μm × 12 μm and height (1.9288 ± 0.0213) μm on thin-film transistor (TFT) drivers with yield over 99.99%. The issue of low bonding yield from polydimethylsiloxane (PDMS) thermal expansion was resolved by adjusting chip spacing on the temporary substrate, achieving bonding yield exceeding 99.8%. A 0.99-inch full-color Micro-LED display with density 114 pixels per inch (PPI) and brightness 5537 cd/m² was fabricated. High-yield bump arrays, Micro-LED arrays, and high bonding yield are highly reproducible, promoting development of Micro-LED displays and related fields.
Journal of Fuel Chemistry and Technology•2026•DOI: 10.1016/S1872-5813(26)60685-8
Steam reforming of biomass-derived alcohols (ethanol, ethylene glycol, glycerol, etc.) represents a critical pathway for sustainable hydrogen energy systems. This review systematically examines recent advances in heterogeneous catalysis, elucidating structure-performance correlations between alcohol molecular structures and catalyst requirements. Ethanol is prone to dehydration and methanation side reactions, while ethylene glycol leverages its dihydroxy structure to enhance dehydrogenation and C–C cleavage, improving H2 selectivity. In contrast, glycerol suffers from intensified reaction network complexity and carbon-induced deactivation due to its trihydroxy configuration. The unified catalyst design strategy involves precisely modulating metal electronic structures (e.g., alloying/atomic-level dispersion) and support oxygen mobility (e.g., rare-earth modification) to synergistically optimize dehydrogenation and carbon resistance. Ni-based catalysts dominate owing to low cost and high C–C bond activation capability, yet their stability requires synergistic enhancement via alloying (Fe, Co, Cu, etc.) or rare-earth modification (Ce, Pr, La, etc.). Noble metal systems (Pt, Rh, Ir, etc.) exhibit low-temperature activity advantages, but are transitioning strategically toward single-atom catalysis and high-entropy-oxide-based multicomponent architectures under cost constraints. Future efforts are suggested to integrate in situ/operando characterization with theoretical modeling to uncover dynamic structure-activity relationships, establish elementary reaction databases for data-driven rational catalyst design, and achieve cross-scale catalyst-reactor synergy, thereby providing a scientific foundation for efficient sustainable hydrogen production.