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Targeted Mesenchymal Stem Cell Delivery
Soft microbots assembled from individual magnetic microsphere scaffold (MMS) beads carrying mesenchymal stem cells (MSCs) use an oscillating magnetic field to induce mechanical flexion to propel the microbot to the target location to release their MSC cargo to promote the wound healing process. More details can be found in article number 2300430 by King Lun...
Flexible Metal–Organic Frameworks
In article number 2301122, Eun Seon Cho and co‐workers design highly flexible metal–organic framework (MOF)‐based proton conductors to control the breathing behavior and hydrogen‐bonding networks with structural transformation through the simultaneous introduction of proton carriers and functional groups. Imidazole‐loaded MIL‐88B without functional groups exhibits...
Photoluminescent Carbon Dots
In article number 2206587, Miroslav Medveď, Giorgio Zoppellaro, Radek Zbořil, Michal Otyepka, and co‐workers report on the photogeneration of long‐lived magnetic electron/hole polaron states in aspartic acid‐based carbon dots and their use in the photoproduction of hydrogen peroxide through the water oxidation reaction. The spatial anisotropy arising from the multilayer...
Hafnium‐Based Nanomaterials
The clinical translation of hafnium oxide for cancer radiotherapy has aroused extensive interest on Hf‐based nanomaterials for biomedical application. In article number 2300341, Gan Tian, Wenyan Yin, and co‐workers comprehensively summarize the recent advances in synthesis, computed tomography (CT)‐involved diagnosis and radiotherapy‐related synergistic cancer therapy of...
Microwave Absorption Materials
The M‐BaM@N‐reduced graphene oxide (RGO) material displays excellent microwave absorption capacity due to its mesoporous structure, in sites formed from Fe3O4 and N doped reduced graphene oxide. The synergistic effect among these nano‐micro structures realizes efficient energy conversion by weakening the incoming wave to reflected waves with lower intensity and different...
Supramolecularly‐Assembled Nanocrystals
In article number 2303496, Vasudevanpillai Biju and Takuya Okamoto show that bidentate ligand‐capped halide perovskite nanocrystals form long‐range ordered supercrystals free from slipping by mechanical force, unlike perovskite nanocrystal or quantum dot assemblies formed by van der Waal's interactions among monodentate ligands. Electronic wavefunction coupling...
Characterization Methods
In article number 2302208, Aimin Du, Xiangming He, and co‐workers utilize theoretical knowledge of crystal structure, structural phase transition, and crystal field theory to provide insights into the chemical‐mechanical degradation failure process of Co‐free Ni‐rich cathode materials for lithium‐ion batteries. Additionally, the authors summarize the application of commonly...
Ratiometric Nanothermometers
Organic nanoparticles based on persistent TTM radicals containing excimers and isolated molecules exhibit all characteristics of ratiometric nanothermometers showing excellent temperature sensitivity, reversibility, and high colloidal stability. In‐vivo experiments made with Caenorhabditis elegans (C. elegans) indicate that they can monitor temperature changes at the (nano)‐micron...
Chiral molecules have recently received renewed interest as highly efficient sources of spin‐selective charge emission known as chiral‐induced spin selectivity (CISS), which potentially offers a fascinating utilization of organic chiral materials in novel solid‐state spintronic devices. However, a practical use of CISS remains far from completion, and rather fundamental obstacles such as (i) external...
Regulating the strain of inorganic perovskites has emerged as a critical approach to control their electronic and optical properties. Here, an alternative strategy to further control the piezoelectric properties by substituting the halogen atom (I/Br) in the CsPbX3 perovskite (X = Cl, Br) structure is adopted. A series of piezoelectric materials with excellent piezoelectric coefficients (d33) are...
Vat photopolymerization (VP) Additive Manufacturing (AM), in which UV light is selectively applied to cure photo‐active polymers into complex geometries with micron‐scale resolution, has a limited selection of aliphatic thermoset materials that exhibit relatively poor thermal performance. Ring‐opening dianhydrides with acrylate‐containing nucleophiles yielded diacrylate ester‐dicarboxylic acids that...
Advanced multiplexing optical labels with multiple information channels provide a powerful strategy for large‐capacity and high‐security information encryption. However, current optical labels face challenges of difficulty to realize independent multi‐channel encryption, cumbersome design, and environmental pollution. Herein, multiplexing chiroptical bio‐labels integrating with multiple optical elements,...
Supramolecularly assembled high‐order supercrystals (SCs) help control the dielectric, electronic, and excitonic properties of semiconductor nanocrystals (NCs) and quantum dots (QDs). Ligand‐engineered perovskite NCs (PNCs) assemble into SCs showing shorter excitonic lifetimes than strongly dielectric PNC films showing long photoluminescence (PL) lifetimes and long‐range carrier diffusion. Monodentate...
Amination of aryl chlorides by metallaphotocatalysis is highly desired but remains practically challenging. Meanwhile, relying on soluble noble‐metal photocatalysts suffers from resource scarcity and structural instability which limit their practical application. Here in, a highly crystalline acetylene‐based hydrazone‐linked covalent organic framewok‐1 (AC‐COF‐1) is reported that enables metallaphotocatalytic...
Controllable modulation of the stacking modes of 2D (two‐dimensional) materials can significantly influence their properties and functionalities but remains a formidable synthetic challenge. Here, an effective strategy is proposed to control the layer stacking of imide‐linked 2D covalent organic frameworks (COFs) by altering the synthetic methods. Specifically, a modulator‐assisted method can afford...
It remains a challenge to develop efficient noble metal‐free electrocatalysts for the oxygen reduction reaction (ORR) in various renewable energy systems. Single atom catalysts have recently drawn great attention as promising candidates both due to their high activity and their utmost atom utilization for electrocatalytic ORR. Herein, the synthesis of an efficient ORR electrocatalyst that is composed...
The interface between the perovskite and electron‐transporting material is often treated for defect passivation to improve the photovoltaic performance of devices. A facile 4‐Acetamidobenzoic acid (containing an acetamido, a carboxyl, and a benzene ring)‐based molecular synergistic passivation (MSP) strategy is developed here to engineer the SnOx/perovskite interface, in which dense SnOx are prepared...
Layered Cobalt (Co)‐free Nickel (Ni)‐rich cathode materials have attracted much attention due to their high energy density and low cost. Still, their further development is hampered by material instability caused by the chemical/mechanical degradation of the material. Although there are numerous doping and modification approaches to improve the stability of layered cathode materials, these approaches...
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