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The oxygen reduction reaction (ORR) catalyzed by transition‐metal single‐atom catalysts (SACs) is promising for practical applications in energy‐conversion devices, but great challenges still remain due to the sluggish kinetics of O═O cleavage. Herein, a kind of high‐density iron network‐like sites catalysts are constructed with optimized intermetallic distances on an amino‐functionalized carbon matrix...
A porous noncovalent organic framework with AIE effect is designed and synthesized as the support for gold nanoparticles (AuNPs). The framework is fabricated through the electrostatic complexation between carboxymethyl cellulose and tetraphenylethene‐containing ammonium surfactant, which can complex AuNPs via the noncovalent interactions to offer a heterogeneous catalyst. Compared to the covalent...
The ever‐growing demands for efficient energy storage accelerate the development of high‐rate lithium‐metal battery (LMB) with desirable energy density, power density, and cycling stability. Nevertheless, the practical application of LMB is critically impeded by internal temperature rise and lithium dendrite growth, especially at high charge/discharge rates. It is highly desired but remains challenging...
Single‐atom Fe catalysts are considered as the promising catalysts for oxygen reduction reaction (ORR). However, the high electronegativity of the symmetrical coordination N atoms around Fe site generally results in too strong adsorption of *OOH intermediates on the active site, severely limiting the catalytic performance. Herein, a “heteroatom pair synergetic modulation” strategy is proposed to tailor...
Organic–inorganic hybrid lead halide perovskites (OLHPs), represented by (CH3NH3)PbI3, are one of the research focus due to their exceptional performance in optoelectronic applications, and ferroelastic domain walls are benign to their charge carrier transport that is confirmed recently. Among them, the 1D OLHPs feature better stability against desorption and moisture, but related 1D ones possessing...
The formation of biofilm and thrombus on medical catheters poses a significant life‐threatening concern. Hydrophilic anti‐biofouling coatings upon catheter surfaces with complex shapes and narrow lumens are demonstrated to have the potential in reducing complications. However, their effectiveness is constrained by poor mechanical stability and weak substrate adhesion. Herein, a novel zwitterionic...
Ultrathin hybrid perovskites, with exotic properties and two‐dimensional geometry, exhibit great potential in nanoscale optical and optoelectronic devices. However, it is still challenging for them to be compatible with high‐resolution patterning technology toward miniaturization and integration applications, as they can be readily damaged by the organic solvents used in standard lithography processes...
The insufficient contact between two phases in the heterostructure weakens the coupling interaction effect, which makes it difficult to effectively improve the electrochemical performance. Herein, a Co‐carbonate hydroxide@ Ni‐metal organic frameworks (Co‐CH@Ni‐MOFs) composite with super uniform core‐shell heterostructure is fabricated by adopting 1D Co‐CH nanowires as structuredirecting agents to...
Annihilation of vacancy clusters in monolayer molybdenum diselenide (MoSe2) under electron beam irradiation is reported. In situ high‐resolution transmission electron microscopy observation reveals that the annihilation is achieved by diffusion of vacancies to the free edge near the vacancy clusters. Monte Carlo simulations confirm that it is energetically favorable for the vacancies to locate at...
Geometric and mechanical characterizations of hydrogel materials at the microscale are attracting increasing attention due to their importance in tissue engineering, regenerative medicine, and drug delivery applications. Contemporary approaches for measuring the these properties of hydrogel microbeads suffer from low‐throughput, complex system configuration, and measurement inaccuracy. In this work,...
A straightforward strategy is described on page 3666 for generating shape‐controlled collagen building blocks with well‐defined architectures. The collagen blocks with tunable geometries are simply produced and released by J. Qin and co‐workers via a membrane‐templated microdevice in a controllable manner. The cell‐laden collagen blocks can spontaneously self‐assemble into organized microtissue constructs...
Creating artificial tissue‐like structures that possess the functionality, specificity, and architecture of native tissues remains a big challenge. A new and straightforward strategy for generating shape‐controlled collagen building blocks with a well‐defined architecture is presented, which can be used for self‐assembly of complex 3D microtissues. Collagen blocks with tunable geometries are controllably...
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