Advanced Materials最新文献

Bismuth ferrite (BiFeO₃, BFO) is a prototypical multiferroic perovskite that simultaneously exhibits ferroelectricity, antiferromagnetism, piezoelectricity, and strong visible-light absorption due to its relatively narrow band gap. The interplay among lattice distortions, defect chemistry, and orbital hybridization not only underpins these multifunctional responses but also renders them highly tunable through defect-dipole modulation, band-gap engineering, and interface or surface control. Owing to the unique coupling between ferroic and electronic functionalities, BFO has emerged as a versatile platform for next-generation sensing technologies, including optoelectronic, pressure, gas, humidity, and biosensors. This review systematically examines the structure-property relationships in BFO, recent advances in synthesis and modification strategies, and their implications for sensor performance across diverse domains. Special emphasis is placed on the microscopic mechanisms governing its sensing behavior, including band-structure modulation, defect-mediated charge transport, and surface adsorption-driven chemistry, as well as on strategies to leverage these mechanisms for sensing performance optimization. Finally, we outline the opportunities and challenges in harnessing BFO's multifunctionality for practical sensing applications in environmental, healthcare, industrial, and energy-related fields.

Plant-based, iridescent, and dynamically tunable structural colored materials are highly attractive for sustainable photonic devices. However, fabricating complex architectures at the decimeter-scale with optical fidelity using plant-derived materials remains challenging, limiting their use in photonic devices and adaptive actuation. Here, we introduce an aqueous two-phase freeform fabrication strategy for vibrantly colored hydroxypropyl cellulose (HPC), where a robust immiscible aqueous environment is developed to preserve HPC cholesteric structures with < 3% shift in peak reflection wavelength over three days, enabling stable processing of large-scale structural colored materials. Our technique involves a food-grade support medium with low interfacial tension, allowing for embedded 3D printing of photonic structures and post-extrusion recovery of the HPC cholesteric domains. Intricate constructs, including interlocking chainmail, with feature sizes down to ∼50 µm and color consistency over lengths exceeding ten centimeters, can be achieved. Additionally, this approach can be utilized to create non-planar, mechanochromic hydrogel actuators with programmable multicolor designs, as demonstrated in an octopus-inspired hydrogel actuator and a color-shifting display for information encryption, camouflage, and human-machine interaction. Our green, freeform manufacturing approach provides new design possibilities for sustainable photonic devices and can be applied to industrially relevant applications.

Precision Tumor Theranostics

The cover illustrates a futuristic conveyor system symbolizing the journey of nanomedicines from design to clinical translation. Each checkpoint—safety, biodistribution, and translational feasibility—filters countless candidates, leaving only the most refined nanodrugs to reach patients. Guided by multimodal imaging and AI-driven analytics, this vision captures the evolving precision and rigor shaping the future of nanotheranostics. More details can be found in the Perspective by Xiaoyuan Chen, Jingjing Zhang, and co-workers (DOI: 10.1002/adma.202510293).

IMPACTFUL Adoptive T Cell Therapy

In their Research Article (DOI: 10.1002/adma.202510842), Mingqiang Li, Yu Tao, Haochen Yao, and co-workers present an immuno-packed T-cell-fusogenic liposome (IMPACTFUL) that enables T-cell engineering through membrane fusion. This approach facilitates concurrent targeting across multiple cellular compartments, including the cell membrane and cytoplasm. By leveraging this dual-targeting strategy, T cells acquire enhanced functionalities, such as improved tumor infiltration, overcoming immune tolerance, and reversing the immunosuppressive tumor microenvironment. This versatile platform offers a promising approach to enhance the therapeutic efficacy of adoptive T cell therapies for solid tumors.

This work reports a hardware-oriented hybrid reservoir computing (HRC) system based on a nanolaminate ferroelectric thin-film transistor (FeTFT) that unifies volatile and nonvolatile functions in a single three-terminal device. The HZO/HfO₂/HZO gate stack modulates grain size and suppresses ferroelectric variability, enabling precise multilevel control and highly linear weight updates via the incremental step pulse with verify algorithm (ISPVA). Electrical input induces long-term memory, while optical excitation yields short-term memory, allowing dual-mode operation. Light-driven 4-bit reservoirs operate at picoampere currents (∼10 pW/device) and emulate nociceptive neuron behavior. Combining three wavelength-dependent reservoirs (405, 450, 532 nm) expands the feature space and improves classification accuracy. Using ISPVA-linearized readout, the system achieves 93.1% and 85.1% accuracies on MNIST and Fashion-MNIST, respectively exceeding prior FeTFT/memristor-based RC systems. This approach establishes a scalable, energy-efficient route toward multifunctional in-sensor neuromorphic computing based on a unified ferroelectric platform.

Photocatalytic oxidation of methane to formaldehyde at concentrations compatible with direct fuel-cell use remains a critical yet unmet challenge. Here we introduce a "dual-gas coadsorption domain" architecture discovered through a high-throughput screen of 37 earth-abundant transition metals and their oxides. Reduced nickel oxide (NiO_1-x) emerged as the optimal co-catalyst, decorating the pore edges of vacancy-rich porous ZnO (pZnO). Oxygen vacancies in pZnO act as oxygen pumps, while adjacent NiO_1-x nanoclusters chemisorb and polarize methane, lowering the C-H activation barrier and steering the radical cascade toward methyl hydroperoxide instead of methanol. Methyl hydroperoxide quantitatively decomposes to formaldehyde, delivering 28.5 mmol g^-1 (3 mM in solution, 88.5% selectivity). An outdoor reactor powered only by natural sunlight (peak 72.8 mW cm^-2) produced 12.3 mmol g^-1 formaldehyde in 6 h without detectable by-products. The concentrated effluent feeds an alkaline formaldehyde fuel cell directly-no purification-co-generating 0.2 kWh of electricity and valuable formate at a peak power density of 32.6 mW cm^-2. The work establishes a scalable, solar-driven pathway for simultaneous methane valorization and on-site energy conversion.

Disordered cathode materials are attractive candidates for next-generation lithium-ion batteries (LIBs), but the intrinsic instability of anionic redox hinders their commercialization. Unlike conventional Li-excess disordered systems limited by compositional constraints of Li_1+xM_1-xO₂, Immm-Li₂NiO₂ offers a platform to access highly lithiated chemistries that enable in situ disorder formation during electrochemical cycling. This allows lattice O to contribute to charge compensation; however, O₂ release at high voltages compromises reversibility and cycling stability. To address this, fluorination generates a quadrupolar Li-O-M-F configuration that lowers the Li─O─Li band energy level and delays the onset of anionic redox. This electronic structure modification suppresses O₂ evolution, enhances structural stability, and improves cycling performance. By coupling electrochemically induced disorder with stabilization through Li-O-M-F units, this work establishes a new framework for engineering durable, high-capacity cathodes, offering a blueprint for material design strategies that transcend stoichiometric restrictions and unlock stable anion redox functionality.

High-Performance Air-Stable Polymer Monolayer Transistors

In their Research Article (DOI: 10.1002/adma.202515591), Mengmeng Li and co-workers demonstrate a fibrillar polymer monolayer with a self-confinement effect, where aligned chains parallel the nanofiber axis. Employing a top-gate CYTOP dielectric, this monolayer transistor achieves high mobility (7.12 cm² V⁻¹ s⁻¹) and exceptional stability over 1260 days in air. Furthermore, monolithic 3D integration with n-type oxide transistors is achieved, enabling hybrid complementary inverters with reasonable voltage amplification capability.