SCIENCE CHINA Materials•2026•DOI: 10.1007/s40843-026-4262-7
The escalating demands of artificial intelligence, machine learning, and neural computing necessitate multifunctional optoelectronic devices capable of integrating sensing, memory, and processing. Two-dimensional van der Waals heterostructures (vdWHs) offer unique advantages, yet their practical deployment is hindered by complex architectures and inefficient mode-switching. Here, we demonstrate a MoTe2/SnS2 anti-ambipolar heterojunction device enabling single-gate reconfiguration among frequency doubling, broadband photodetection, and neuromorphic computing. The device exhibits a peak-to-valley ratio (PVR) of 465, ensuring efficient frequency doubling. As a photodetector, it operates across an exceptionally broad spectral range of 520–2200 nm, with outstanding responsivity and detectivity. Furthermore, the device emulates complete synaptic behaviors, including short-term plasticity (STP), long-term plasticity (LTP), and paired-pulse facilitation (PPF). Integrated into a reservoir computing (RC) system trained on a vehicle motion dataset, it achieves a directional recognition accuracy of 98.7%. This work establishes a paradigm for multifunctional integration and low-power neuromorphic computing, advancing next-generation intelligent optoelectronic systems.
SCIENCE CHINA Materials•2026•DOI: 10.1007/s40843-025-3470-6
Inkjet printing of two-dimensional transition metal chalcogenides (TMDs) is promising for low-cost, large-scale flexible electronics, yet challenges persist due to poor crystallinity and toxic solvents. Here, we report a green ink formulation using zwitterionic cocamidopropyl betaine (CAB) as a dispersant and surfactant for liquid-phase exfoliation of single-crystalline TMDs in water and isopropanol (IPA). The dispersions contain no additives or binders, enabling direct production of stable (over one month) and concentrated (2 mg/mL) inks for MoS2, MoTe2, WS2, WSe2, and WTe2. Fully-printed MoSe2/CAB humidity sensors exhibit superior sensitivity (ΔI/I0 = 468.1) and rapid response/recovery times (27 s/0.42 s) under bending. Inkjet-printed WTe2/CAB pads on 6-μm-thick substrates demonstrate exceptional mechanical stability, with resistance variations of 1.4% under single bending and 2% after 1,000 cycles, and acquire high-quality electrocardiogram (ECG) and electromyography (EMG) signals. This strategy enables scalable fabrication of TMD-based flexible electronics, advancing industrial integration.
Environmental Chemistry•2026•DOI: 10.7524/j.issn.0254-6108.2025011101
This study investigates the adsorption characteristics and mechanisms of Cd, Ni, and Pb on yellow soils collected from multiple sites in Guizhou Province, China. Soil physicochemical properties, potentiometric titration, adsorption edge experiments, and a 1-site/2-pKa surface complexation model (SCM) were integrated to derive acid-base parameters and metal adsorption constants. Linear regression models established quantitative relationships between SCM parameters and soil properties, enabling prediction of adsorption behavior for new soil samples. Results showed that adsorption capacities increased with pH and followed the order Pb > Ni > Cd, influenced by hydrated radius, hydrolysis constant, and electronegativity. Soils with higher surface site concentration (Hs) and lower point of zero charge (pHpzc) exhibited greater metal adsorption. The SCM fitted adsorption edges with R ≥ 0.94, confirming its validity. pH was the dominant factor controlling metal complexation constants (lgKSOMe), acid-base equilibrium constants, and surface site density (Ds), with influence order Pb > Ni > Cd. Free iron oxide correlated negatively with deprotonation constant (pKa2). Ds was also affected by cation exchange capacity and specific surface area. Validation using a separate set of soil samples yielded good agreement between predicted and measured adsorption (R² = 0.75–0.82, RMSE = 0.1–0.51). This combined modeling approach simplifies experimental procedures and offers a robust tool for assessing heavy metal environmental risks and remediation strategies.
SCIENCE CHINA Materials•2026•DOI: 10.1007/s40843-026-4071-3
The low survival rate and compromised functionality of β cells present significant obstacles in islet transplantation for diabetes management. Recent studies indicate that the sensitivity of β cells to their microenvironment may be a contributing factor. In this study, Biotin-DFYIGSRGD hydrogel (Supragel) was employed to replicate the microenvironment of mouse β cells (MIN6 cells) and human islets, enhancing cell viability, functionality, and structural integrity. Compared with conventional two-dimensional cell culture methods utilizing cell plates, MIN6 cells cultured on the gel adhered and self-organized into cell spheroids, resulting in increased synthesis of insulin and glucagon. Furthermore, the hydrogel effectively preserved the integrity of human islets and extended their in vitro culture period. This improvement may be attributed to the optimal hardness of the gel, which facilitated cell adhesion and promoted vascularization. Additionally, the gel exhibited sustained in vivo retention over 120 days, undergoing gradual degradation without eliciting significant inflammatory responses. These properties establish it as a promising encapsulation material for pancreatic islet cells or organoids, supporting long-term cell survival, function, and integration with host tissues. The study highlights the potential of Biotin-DFYIGSRGD hydrogel as an islet culture platform for diabetes treatment.