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Metal organic frameworks (MOFs) are promising as effective electrocatalysts toward oxygen evolution reaction (OER). However, the origin of OER activity for MOF‐based electrocatalysts is still unclear because of their structure reconstruction during electrocatalysis process. Here, a novel MOF (B‐MOF‐Zn‐Co) with spherical superstructure is developed by hydrothermal treatment of zeolitic imidazolate...
Li‐O2 batteries could deliver ultra‐high theoretical energy density compared to current Li‐ion batteries counterpart. The slow cathode reaction kinetics in Li‐O2 batteries, however, limits their electrocatalytic performance. To this end, MoSe2 and Ni0.85Se nanoflakes were decorated in carbon hollow nanoflowers, which were served as the cathode catalysts for Li‐O2 batteries. The hexagonal Ni0.85Se...
Pooled nucleic acid amplification test is a promising strategy to reduce cost and resources for screening large populations for infectious disease. However, the benefit of pooled testing is reversed when disease prevalence is high, because of the need to retest each sample to identify infected individual when a pool is positive. Split, Amplify, and Melt analysis of Pooled Assay (SAMPA) is presented,...
Nanotransducers
The microbial‐free bumblebee is a powerful tool to explore the precise control of engineered microbiota. Nanotransducers are fabricated to regulate the engineered bacteria inside the bumblebee gut by two spatiotemporal means, including magneto‐thermal and photothermal. This advanced technology lays the foundation for the treatment of bumblebee intestinal parasitic diseases and the...
Bumblebees are essential pollinators of wild‐flowering plants and crops. It is noticed that regulating the gut microorganisms of bumblebees is of great significance for the maintenance of bumblebee health and disease treatment. Additionally, social bees are used as models to study regulatory control methods of gut bacteria in vivo. However, these methods lack precision and are not studied in bumblebees...
High‐capacity anode materials (e.g., Si) are highly needed for high energy density battery systems, but they usually suffer from low initial coulombic efficiency (CE), short cycle life, and low‐rate capability caused by large volume changes during the charge and discharge process. Here, a novel dendrimer‐based binder for boosting the electrochemical performance of Si anodes is developed. The polyamidoamine...
Organic flexible electronic devices are at the forefront of the electronics as they possess the potential to bring about a major lifestyle revolution owing to outstanding properties of organic semiconductors, including solution processability, lightweight and flexibility. For the integration of organic flexible electronics, the precise patterning and ordered assembly of organic semiconductors have...
Posterior capsular opacification (PCO) is the leading complication after cataract surgery, and is mainly induced by the proliferation and migration of residual lens epithelial cells (LECs). Although numerous attempts have been made to reduce the incidence of PCO, this complication remains a critical challenge in postoperative visual recovery. This study aims to report a functionalized intraocular...
Ocular Photothermal Therapy
In article number 2201098, Hui‐jiuan Chen, Weirong Chen, and co‐workers develop a functionalized intraocular lens with region‐confined photothermal effect, whose outer rim is decorated with a layer of nanoporous gold ring using micromanufacturing technology. Such a photothermal intraocular lens can precisely induce the apoptosis of residual lens epithelial cells under mild...
The morphologies of micromaterials play a key role in their functionality and efficiency across a broad range of applications, including catalysis, environmental remediation, and drug delivery. However, the relationships between the morphologies and performances of micromaterials still need to be further understood, to guide the rational design of effective morphologies for specific applications....
Pollen‐Derived Microstructures
In article number 2200037, Yuan Lu and co‐workers propose a pollen‐derived microstructure library containing multivariate morphological characterization and functional performance, which offers a powerful tool for studying morpho–performance relationships of micromaterials and inspires the rational design of micro‐/nanomaterials for applications.
Atomically dispersed metal catalysts often exhibit high catalytic performances, but the metal loading density must be kept low to avoid the formation of metal nanoparticles, making it difficult to improve the overall activity. Diverse strategies based on creating more anchoring sites (ASs) have been adopted to elevate the loading density. One problem of such traditional methods is that the single...
Single‐Atom Catalysts
The low loading of single‐atom catalysts makes it difficult to improve their overall activity. In article number 2200073, Ang Li, Erjun Kan, Li Song, Jinlong Gong, and co‐workers report a chemical scissors strategy to saturate the anchoring sites for single atoms, which elevates the loading of Pd single atoms even on bare substrate with only a few anchoring sites.
The surface Fermi level pinning effect promotes the formation of metal‐independent Ohmic contacts for the high‐speed GaSb nanowires (NWs) electronic devices, however, it limits next‐generation optoelectronic devices. In this work, lead‐free all‐inorganic perovskites with broad bandgaps and low work functions are adopted to decorate the surfaces of GaSb NWs, demonstrating the success in the construction...
Construction of photocatalytic systems with spatially separated dual cocatalysts is considered as a promising route to modulate charge separation/transfer, promote surface redox reactivities, and prevent unwanted reverse reactions. However, past efforts on the loading of spatially separated double‐cocatalysts are limited to hollow structured semiconductors with inner/outer surface and monocrystalline...
Perovskite oxides are studied as electrocatalysts for oxygen evolution reactions (OER) because of their low cost, tunable structure, high stability, and good catalytic activity. However, there are two main challenges for most perovskite oxides to be efficient in OER, namely less active sites and low electrical conductivity, leading to limited catalytic performance. To overcome these intrinsic obstacles,...
2D materials have been interesting for applications into nanodevices due to their intriguing physical properties. In this work, four types of unique structures are designed that are composed of MXenes and C/N‐Si layers (CNSi), where MXene is sandwiched by the CNSi layers with different thicknesses, for their practical applications into integrated devices. The systematic calculations on their elastic...
Perovskite Oxide‐Based Electrocatalysts
In article number 2101605, Shi Chen, Shuangpeng Wang, Guichuan Xing, Hui Pan, and co‐workers systematically summarize perovskite oxides as electrocatalysts for efficient oxygen evolution reaction (OER). The catalytic mechanism and descriptors for perovskite oxides are also discussed in detail. Additionally, various strategies to improve the OER catalytic performance...
Designing highly efficient and durable electrocatalysts that accelerate sluggish oxygen reduction reaction kinetics for fuel cells and metal–air batteries are highly desirable but challenging. Herein, a facile yet robust strategy is reported to rationally design single iron active centers synergized with local S atoms in metal–organic frameworks derived from hierarchically porous carbon nanorods (Fe/N,S‐HC)...
The relative low hole mobility of p‐channel building block device challenges the continued miniaturization of modern electronic chips. Metal‐semiconductor junction is always an efficient strategy to control the carrier concentration of channel semiconductor, benefiting the carrier mobility regulation of building block device. In this work, complementary metal oxide semiconductor (CMOS)‐compatible...
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