SCIENCE CHINA Materials•2026•DOI: 10.1007/s40843-026-4425-4
Flexible and weavable alternating-current electroluminescent (ACEL) fiber devices are pivotal for wearable displays and human-computer interfaces, yet their intrinsic lack of color tunability restricts high-density information interaction. This study presents a dynamically color-tunable electroluminescent fiber device with a coaxial winding structure that integrates multiple fiber electrodes emitting the three primary colors. Through simple voltage driving, the device achieves a color gamut covering 131.07% of the sRGB standard, enabling arbitrary full-color tunability, including standard white light with CIE coordinates of (0.31, 0.33). The emission peak is continuously tunable over a 161.7 nm range, a 4-fold enhancement compared to previously reported ACEL fibers. The coaxial winding architecture is compatible with large-scale fabrication, yielding hundred-meter-scale fiber devices with a luminance variation of only 2.76%. The electroluminescent performance remains stable under stringent industrial standards: 10,000 friction cycles, 20 accelerated washing cycles, and 10-day storage at 105 °C and −20 °C. Integration into a smart textile watchband demonstrates real-time heart rate visualization via progress color changes and gesture-controlled color switching, validating its potential as an effective human-computer interface.
SCIENCE CHINA Materials•2026•DOI: 10.1007/s40843-025-3805-1
The sluggish kinetics of oxygen reduction and evolution reactions (ORR/OER) at the air electrode impede the practical deployment of fiber zinc-air batteries (FZABs) for wearable electronics. Conventional bifunctional catalysts suffer from an inherent activity trade-off due to the distinct mechanisms of ORR and OER. Here, we propose a spatial decoupling strategy to overcome this limitation by engineering isolated Fe single atoms and Fe–Ir dual-atom pairs on a nitrogen-doped carbon matrix (Fe/FeIr-NC). In this architecture, Fe single atoms serve as ORR centers, while Fe–Ir pairs with tunable spacing are tailored for OER, enabling complete functional separation and independent optimization. The catalyst exhibits an ORR half-wave potential of 0.91 V and an OER overpotential of 250 mV at 10 mA cm−2, yielding a record-low bifunctional gap (ΔE = 0.57 V) that outperforms all reported single- and dual-atom catalysts. A flexible fiber zinc-air battery based on this catalyst delivers a peak power density of 3920 W kg−1, along with a 1.4-fold increase in energy efficiency and a 2.6-fold extension in cycle life compared to the commercial Pt/C + IrO2 benchmark. This work not only breaks the traditional activity trade-off in bifunctional catalysis but also offers a promising route toward high-performance power sources for wearable electronics.
Journal of Environmental Engineering Technology•2026•DOI: 10.13205/j.hjgc.202604007
Low C/N ratios in wastewater treatment plant effluent necessitate external carbon sources for denitrification, but conventional liquid carbon sources are costly and unstable. This study prepared nine composite solid-phase carbon sources by combining PHBV with natural cellulose materials (straw, sawdust, corncob) at different mass ratios. Dynamic release experiments, DOC analysis, UV-Vis spectroscopy, and EEM fluorescence were employed to characterize carbon release. Results showed that increasing cellulose proportion in corncob-based sources led to release patterns opposite to those of straw- and sawdust-based sources. For straw and sawdust, higher cellulose ratios accelerated release rates, increased total release and duration, reduced aromaticity and molecular weight of released DOM, and promoted protein-like components (tryptophan, tyrosine), indicating enhanced bioavailability. Under identical ratios, corncob-based sources exhibited moderate total release, release durations exceeding 134 h, lower DOM aromaticity and molecular weight, and lower humic substance proportion, indicating superior bioavailability and engineering potential. Among the nine sources, JG5, MX5, and CC4 (PHBV:cellulose mass ratios of 4:5, 4:5, and 1:1, respectively) showed optimal comprehensive performance with low theoretical maximum release, long release periods, and high mass transfer coefficients. EEM-PARAFAC identified three DOM components (protein-like C1, C2; humic-like C3), with protein-like components dominating. This study validates the relationship between cellulose proportion and release kinetics and reveals synergistic regulation of DOM components, offering guidance for designing effective solid-phase carbon sources.
SCIENCE CHINA Materials•2026•DOI: 10.1007/s40843-025-3882-y
Organic semiconductor crystals with well-defined morphologies are highly desirable for high-performance optoelectronic devices, yet precise control over their growth remains a challenge. Here, a novel donor-acceptor (D-A) molecule, TQDPT, has been successfully developed, featuring a rigid π-conjugated acceptor core composed of thiazoloquinoxaline and naphthalene, coupled with phenylphenothiazine donors. This study presents a temperature-mediated crystallization strategy for precisely controlling the morphology and carrier transport properties of TQDPT single crystals. By systematically investigating the growth kinetics across a controlled temperature range (15–35°C), we reveal a distinct transition from needle-like structures to plate-like crystals, with tunable average widths spanning from around 2.8 to 30.1 μm. This morphological evolution is driven by temperature-dependent molecular diffusion and nucleation kinetics. Significantly, the plate-like crystals grown at 25°C exhibit an order-of-magnitude enhancement in mobility compared to needle-like counterparts, while higher temperatures of 35°C yield broader crystals with improved carrier mobility and device stability. This work highlights the critical role of temperature as a pivotal parameter in the dimensional and electronic optimization of organic crystals, offering an attractive approach to optimize functional materials for advanced optoelectronics.
SCIENCE CHINA Materials•2026•DOI: 10.1007/s40843-025-4107-x
Aqueous fiber zinc-iodine batteries (FZIBs) with four-electron redox exhibit inherent safety and high energy density for wearable electronics. Nevertheless, their practical implementations are hindered by unsatisfactory cycling stability and low realistic energy density, mainly caused by severe H2O-induced nucleophilic attack toward iodine species and poor zinc anode reversibility. Here, we report a quaternary ammonium-mediated coordination strategy to simultaneously address the irreversible cathode/anode redox behavior and thus promote the electrochemical performance of four-electron FZIBs. The cationic choline ion (Ch+) induces complexation with ICl2− via electrostatic interaction, homogenizing the electron cloud density and suppressing irreversible hydrolysis of I+ species, enabling a reversible near-theoretical high capacity of 418.3 mAh g−1. Meanwhile, preferentially adsorbed Ch+ on the zinc anode surface creates positively charged shielding layers, mitigating the tip effect caused by localized electric field and achieving robust zinc stripping/plating. The enhanced cathode/anode reversibility and improved interfacial stability enable stable FZIBs operation for over 20,000 cycles at 20.0 A g−1. Moreover, successful integration of FZIBs into electronic textiles with glucose and cardiac rhythm sensors demonstrates great potential for next-generation wearable electronics.
Environmental Chemistry•2026•DOI: 10.7524/j.issn.0254-6108.2026051001
Haikou, a representative tropical city in China, experiences air pollution influenced by both local emissions and regional transport. This study analyzed O3 and PM2.5 concentrations, emission sources, and meteorological fields from Haikou and Guangdong-Guangxi cities in 2024, employing correlation analysis and the Weighted Potential Source Contribution Function (WPSCF) to systematically investigate spatial-temporal patterns, regional linkages, and transport mechanisms. Results revealed distinct pollution characteristics: Hainan exhibited prominent O3 pollution in autumn and winter, while the Pearl River Delta (PRD) in Guangdong suffered significant O3 pollution year-round, positioning it as the core control area. Guangxi was characterized by severe PM2.5 pollution in winter with extensive high concentration areas. Haikou's O3 and PM2.5 concentrations showed strong correlations with those in Zhanjiang and Maoming throughout the year, particularly in winter. Regional transport analysis indicated that O3 pollution in Haikou depended on stable cross-regional precursor transport coupled with intense photochemical conditions, whereas PM2.5 exhibited diverse transport pathways across seasons. Lag effect analysis confirmed that pollution exceedance days were substantially influenced by upwind transport from the previous day, highlighting the dominant role of cross-regional physical transport. Autumn pollution was driven by stable surface northeasterly winds and upper-level uniform pressure fields. Potential source areas were highly consistent with the MEIC emission inventory, confirming distinct contributions of transport pathways for O3 and PM2.5. These findings provide a scientific basis for differentiated collaborative control of air pollution in tropical coastal cities.
SCIENCE CHINA Materials•2026•DOI: 10.1007/s40843-026-4147-9
Fiber-shaped zinc-air batteries (FZABs) with aqueous electrolytes combine intrinsic safety, high energy density (1086 Wh kg−1), and environmental compatibility, making them attractive for wearable applications. However, free water in the electrolyte induces severe anode degradation while being a critical reactant for cathode redox, presenting a dilemma between anode stability and cathode functionality. The semi-open structure of FZABs allows airborne water to permeate and migrate to the anode, causing interfacial instability, while high surface area accelerates solvent evaporation, leading to increased internal resistance and salt crystallization. Consequently, typical cycle life is limited to <50 h. To overcome these challenges, we report a polymer electrolyte that captures atmospheric water as a solvent through the semi-open structure, achieved by introducing acetamide (AA), identified via unsupervised clustering algorithms, into the poly(vinylidene fluoride-hexafluoropropylene)/zinc trifluoromethanesulfonate (PVDF-HFP/Zn(OTf)2) system. AA incorporation preserves solvent-retention capability while reconstructing the Zn2+ coordination structure, promoting salt dissociation and polymer-segment mobility. Low adsorption energy of AA on zinc surfaces suppresses parasitic reactions from ambient moisture, and preferential adsorption across zinc crystal planes directs Zn2+ deposition along the (002) face, leading to uniform plating morphology. The exogenous aqueous polymer electrolyte exhibits superior mechanical properties, enabling stable output even after compression by a 1.7-t vehicle. As proof-of-concept, FZABs integrated with fiber solar cells and sensors in clothing enabled real-time health monitoring and sustainable energy utilization, demonstrating promising practical applications.