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ABSTRACT Metal–organic frameworks (MOFs), such as zeolitic imidazolate framework‐L (ZIF‐L), are organized porous materials that are sensitive to synthesis and processing conditions. Here, we report a one‐pot, purely aqueous route that couples pH‐controlled anisotropic growth of ZIF‐L platelets to unique belt morphologies and surface functionalization with citric‐acid‐capped Fe₃O₄magnetic nanoparticles. This interfacial stabilization control of originally metastable layered MOF phases yields magnetically responsive nanomaterials without organic solvents, surfactants, or post‐synthetic processing. By adjusting the basicity of the 2‐methylimidazole environment, conventional ZIF‐L leaf platelets reproducibly evolve into high‐aspect‐ratio, elongated, belt‐like platelets with an aspect ratio of ∼10, while retaining the layered organization of the original ZIF‐L phase. Plane‐resolved x‐ray peak shifts (Δd/d ratio) show distinct, anisotropic lattice distortions, suggesting a stabilization mechanism in which interfacial coordination of carboxylate groups to under‐coordinated surface Zn²⁺sites moderates layer relaxation and reconstruction pathways during synthesis and nanoparticle addition. This approach provides unique MOF belt morphology with enhanced phase stability and may be suggested as a scalable strategy for producing stable, anisotropic, magnetically responsive MOF‐based nanocomposites with non‐traditional shapes. 

Abstract As known, n‐type inorganic semiconductor nanoparticles such as zinc oxide nanoparticles have been explored in various sensing applications, which demand high‐density electronic elements placement for rapid operation. Herein, high‐resolution designs of conductive channels of noble metal‐doped zinc oxide nanoparticles is demonstrated using an engraving transfer printing process and silver metal doping approach. Such thin‐film transistors with reduced feature size to 2 µm fabricated exhibited significantly enhanced electron mobility up 3.46 × 10⁻²cm²V⁻¹s⁻¹and light sensitivity. Furthermore, the integration of this micropatterning technology and metal doping in thin‐film transistors is utilized for control of current–voltage characteristics under the ultraviolet radiation with high sensitivity. It is suggested that this approach to design of doped inorganic nanoparticle channels paves the way for high‐density thin‐film transistors suitable for optoelectronic circuit, UV photodetectors and neuromorphic computing systems. 

Natural polymers such as plant-derived cellulose nanocrystals (CNCs) are renowned for color iridescence due to their internal helical organization but show modest stretchability and bending abilities because of the brittle nature of highly crystalline needle-like nanocrystals. Herein, we report the highly stretchable composite materials built from these nanocrystals and hyperbranched ionic polymers (bIPs) with terminal amine-terminated poly(N-isopropylacrylamide) (PNIPAM) stacked between elastomeric layers. These layered elastomeric composites preserve high mechanical stretchability of polyurethane outer layers up to 150%. Furthermore. The toughness increased manifold due to the sequential initiation and arresting of concurrent transversal cracks within the reinforcing central nanocomposite layer. Moreover, vivid structural colors of CNC helical organization preserved within these laminated composites show the ability to response to humidity and temperature. We suggest that these elastomeric composite laminates with preserved structural colors of helical nanocellulose organization can be considered as promising candidates for demanding applications, such as robust wearable sensors, flexible optical labels, and photonic devices. 

Abstract Microfluidic‐based wearable electrochemical sensors represent a transformative approach to non‐invasive, real‐time health monitoring through continuous biochemical analysis of body fluids such as sweat, saliva, and interstitial fluid. These systems offer significant potential for personalized healthcare and disease management by enabling real‐time detection of key biomarkers. However, challenges remain in optimizing microfluidic channel design, ensuring consistent biofluid collection, balancing high‐resolution fabrication with scalability, integrating flexible biocompatible materials, and establishing standardized validation protocols. This review explores advancements in microfluidic design, fabrication techniques, and integrated electrochemical sensors that have improved sensitivity, selectivity, and durability. Conventional photolithography, 3D printing, and laser‐based fabrication methods are compared, highlighting their mechanisms, advantages, and trade‐offs in microfluidic channel production. The application section summarizes strategies to overcome variability in biofluid composition, sensor drift, and user adaptability through innovative solutions such as hybrid material integration, self‐powered systems, and AI‐assisted data analysis. By analyzing recent breakthroughs, this paper outlines critical pathways for expanding wearable sensor technologies and achieving seamless operation in diverse real‐world settings, paving the way for a new era of digital health. 

Abstract The study reports novel photonic properties of Ti₃C₂T_xMXene flakes horizontally self‐assembled within cellulose nanofiber (CNF) matrix exhibiting unique bright multispectral colors combined with overall high transparency in the transmission regime. The intense reflection colors are reflected by individual flakes acting as effective micromirrors with shifts based on their subsurface positioning within the dielectric layers. Unique color appearances are controlled by an interplay of multiple bandgaps formed by constructive and destructive interferences at flake‐matrix interfaces. These colors manifest at the microscale under bright field optical microscopy, while the total physical film retains high transparency up to 85% and a typical greenish hue characteristic of the MXene content below 1% volume fraction. The diverse spectral appearance of 4 µm ultra‐thin films is ultimately controlled by the positioning of the horizontal flakes within the nanofiber matrix at diverse distances from the top surface. This work expands the understanding of thin films with assembled 2D materials within polymer matrix and their fundamental interactions creating new structural coloration functionalities with the potential for multispectral photonic applications such as camouflaging, photothermal treatment, and optical communication for flexible thin bio‐derived films. 

Ceramic-in-polymer composite solid electrolytes (SEs) show great potential for meeting the high-performance requirements of all-solid-state batteries (ASSBs) due to the combined benefits of easy processability, tunable Li-ion conductivity, wide electrochemical window, and facile interfacial contact with the Li-metal anode. However, their Li-ion conductivity remains lower than that of the pure ceramic phase, which can be attributed to the highly resistive ceramic/polymer interphase. In this paper, we introduced sulfur-containing functional groups through a less-explored metal/sulfur interaction strategy, enabling simultaneous modification of the polyethylene glycol diacrylate (PEGDA) polymer scaffold and the Li6.4La3Zr1.4Ta0.6O12 (LLZO) ceramic surface. We elucidated the nature of metal/sulfur interactions, i.e., the preferential coordination interaction between Zr and sulfur, as well as electron-transfer reactions from sulfur to Zr and La atoms. In addition, we unraveled the mechanisms of metal/sulfur interaction-enabled in situ photopolymerization of the PEGDA scaffold and developed a layer-by-layer method that exploits metal/sulfur interactions for manufacturing sulfur-modified LLZO-in-PEGDA composites. This dual-modification strategy effectively promotes Li-ion transport at both LLZO/LLZO and LLZO/PEGDA interphases, resulting in enhanced ionic conductivity and lower activation energy. As a result, the LLZO-in-PEGDA composite exhibited a high conductivity of 5.1 × 10–4 S cm–1, exceeding the vendor-reported conductivity of pure LLZO. In addition, the sulfur-modified LLZO-in-PEGDA composites exhibited improved toughness and stretchability, suggesting the potential dual role as a protective layer for electrode materials. The metal/sulfur-interaction-enabled dual modification offers a promising strategy that can be broadly applied to the rational design of ceramic/polymer composite materials 

Abstract We demonstrate shear‐printed layered photonic films with vivid structural coloration from bio‐derived cellulose nanocrystals and highly aligned Ti₃C₂T_xMXene nanoflakes. These ultrathin films (700–1500 nm) show high light transmittance above 40% in the visible range. In reflectance mode, however, the films appear vividly colored and iridescent due to the multiple distinct photonic bandgaps in the visible and near‐infrared ranges, which are rarely observed in CNC composites. The structural coloration is controlled by the stacking of MXene nanoscale‐thin layers separated by the thicker cellulose nanocrystals matrix, as confirmed by photonic simulations. The unique combination of distinctly different optical appearances in transmittance and reflectance modes occurs in films printed with just a few layers. This is because of the molecularly smooth interfaces and the high refractive contrast between bio‐based and inorganic phases, which result in a concurrence of constructive and destructive interference. These lamellar biophotonic films open the possibilities for advanced radiative cooling, camouflaging, multifunctional capacitors, and optical filtration applications, while the cellulose nanocrystals matrix strengthens their flexibility, robustness, and facilitates sustainability.