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Micromanipulation
In article number 2105414, Xue Bai, Lin Feng, and co‐workers develop a magnetically actuated cell‐robot system for micromanipulation. The robots exhibit high position control accuracy and generate a flow field that can be used to transport microspheres and cells using an external rotating magnetic field. The cell robots can also form chain‐like swarms to transport a large object...
Pistonless Syringe Pumps
In article number 2106221, Joon‐wan Kim and co‐workers propose an on‐chip microsyringe pump without mechanical sliding parts and with high power sources. As a liquid handing workstation is used for high throughput screening, the authors' micropumps integrated with other microfluidic devices by micro‐electro‐mechanical systems fabrication have the potential to perform the same...
Energy Harvesting
In article number 2104472, Qing Wang, Chang Kyu Jeong, and co‐workers study the enhancement of piezoelectric device performance using the morphotropic phase boundary behavior of polyvinylidene fluoride‐based polymers related with its relaxor property. Moreover, it is proved that the characteristics are maintained in the nanofiber feature.
Solar Cells
In article number 2108090, Gang Wang, Hao‐Li Zhang, Zhiwen Jin, and co‐workers propose a C3N quantum dots insertion method to effectively adsorb bulky organic cations, and provide nucleation sites to realize gradient distribution of solute in 2D CsPbI3 film to obtain a bi‐directional crystallization process. Importantly, the optimized 2D CsPbI3 film‐based device delivers a high power conversion...
In Situ Crystallization
In article number 2107452, Song Chen, Yu Chen, and co‐workers report a strategy for in‐situ crystallization of CsPbBr3 nanocrystals within silica nanospheres by a carefully designed, multistep, high‐temperature treatment. The image presents the well‐protected CsPbBr3 nanocrystals with excellent thermal stability, referencing the Chinese traditional story of “Bagua furnace alchemy...
As the most successful anode material for sodium‐ion batteries, hard carbon has attracted extensive attention from researchers. However, its storage mechanism is still controversial. In this paper, a solvent co‐intercalation mechanism into hard carbon is proposed and is proved by in situ XRD and ex situ TEM XPS results successfully. Thanks to the co‐intercalation of solvent, the platform capacity...
Immunotherapy brings great benefits for tumor therapy in clinical treatments but encounters the severe challenge of low response rate mainly because of the immunosuppressive tumor microenvironment. Multifunctional nanoplatforms integrating effective drug delivery and medical imaging offer tremendous potential for cancer treatment, which may play a critical role in combinational immunotherapy to overcome...
Radical‐containing frameworks (RCFs) have emerged as promising functional materials in various fields due to the combination of the highly ordered frame structure and the fascinating property of organic radicals. Here, the first example of radical‐containing supramolecular organic frameworks (SOFs) fabricated by the chaotropic effect between closo‐dodecaborate cluster (B12H122−) and 2,4,6‐tri(4‐pyridyl)‐1,3,5‐triazine...
On‐chip silicon microcavity sensors are advantageous for the detection of virus and biomolecules due to their compactness and the enhanced light–matter interaction with the analyte. While their theoretical sensitivity is at the single‐molecule level, the fabrication of high quality (Q) factor silicon cavities and their integration with optical couplers remain as major hurdles in applications such...
The design of highly active and durable catalysts for the sluggish anodic oxygen evolution reaction (OER) in acid remains an urgent yet challenging goal in water electrolysis. Herein, a core‐shell nanostructured Ru@Ir–O catalyst with tensile strains and incorporated oxygens is introduced in the Ir shell that holds an extremely low OER overpotential of 238 mV at 10 mA cm−2 in acid. The material also...
Two‐dimensional (2D) CsPbI3 is developed to conquer the phase‐stability problem of CsPbI3 by introducing bulky organic cations to produce a steric hindrance effect. However, organic cations also inevitably increase the formation energy and difficulty in crystallization kinetics regulation. Such poor crystallization process modulation of 2D CsPbI3 leads to disordered phase‐arrangement, which impedes...
Light‐actuated micromachines are of enormous interest due to their ability to harvest light for triggering catalytic reactions to acquire free energy for mechanical work. This work presents an inorganic–organic hybrid copolymeric poly(cyclotriphosphazene‐co‐barbituric acid) colloid, which displays multiwavelength excited emission and catalytic activities, exploiting the unique structural, chemical,...
Electrochemical (EC) actuators have garnered significant attention in recent years, yet there are still some critical challenges to limit their application range, such as responsive time, multifunctionality, and actuating direction. Herein, an EC actuator with a back‐to‐back structure is fabricated by stacking two membranes with bilayer V2O5 nanowires/single‐walled carbon nanotubes (V2O5 NWs/SWCNTs)...
The density functional theory calculation results reveal that the adjacent defect concentration and electronic spin state can effectively activate the CoIII sites in the atomically thin nanosheets, facilitating the thermodynamic transformation of *O to *OOH, thus offering ultrahigh charge transfer properties and efficiently stabilizing the phase. This undoubtedly evidences that, for metal sulfides,...
Surface oxygen vacancies (Vo) regulation is an effective strategy to improve the electrochemical CO2 reduction reaction (CO2RR) performance by lowering the activation energy barrier of CO2; however, the lack of precise control over the local atomic structures severely hinders the large‐scale application of Vo‐activated electrocatalyst for CO2RR. Herein, an efficient strategy to facilitate CO2 activation...
Hypoxia is a hallmark of the tumor microenvironment (TME) that promotes tumor development and metastasis. Photodynamic therapy (PDT) is a promising strategy in the treatment of tumors, but it is limited by the lack of oxygen in TME. In this work, an O2 self‐supply PDT system is constructed by co‐encapsulation of chlorin e6 (Ce6) and a MnO2 core in an engineered ferritin (Ftn), generating a nanozyme...
The surface fouling of biomedical devices has been an ongoing issue in healthcare. Bacterial and blood adhesion in particular, severely impede the performance of such tools, leading to poor patient outcomes. Various structural and chemical modifications have been shown to reduce fouling, but all existing strategies lack the combination of physical, chemical, and economic traits necessary for widespread...
InP quantum dots (QDs) have attracted much attention owing to their nontoxic properties and shown great potential in optoelectronic applications. Due to the surface defects and lattice mismatch, the interfacial structure of InP/ZnS QDs plays a significant role in their performance. Herein, the formation of In–S and Sx–In–P1−x interlayers through anion exchange at the shell‐growth stage is revealed...
Macrophages (Mφs) are characterized by remarkable plasticity, an essential component of chronic inflammation. Thus, an appropriate and timely transition from proinflammatory (M1) to anti‐inflammatory (M2) Mφs during wound healing is vital to promoting resolution of acute inflammation and enhancing tissue repair. Herein, exosomes derived from M2‐Mφs (M2‐Exos), which contain putative key regulators...
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