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Synergizing Phase and Cavity in CoMoOxSy Yolk–Shell Anodes to Co‐Enhance Capacity and Rate Capability in Sodium Storage

Facile co‐engineering on polymorph phases and cavity structures based on CoMo‐glycerate by scalable solvothermal sulfidation. The optimized strategy enables the construction of an amorphous yolk–shell CoMoO x S y with sulfidation‐induced amorphous phase and yolk–shell confined cavity. Such CoMoO x S y electrodes with unique...

Single Ni Atoms and Clusters Embedded in N‐Doped Carbon “Tubes on Fibers” Matrix with Bifunctional Activity for Water Splitting at High Current Densities

Integrating nickel–iron (NiFe) clusters and isolated nickel atoms into hierarchical carbon matrix leads to an exceptionally efficient multifunctional catalytic activity, surpassing each of the monofunctional catalytic activities ever reported. In particular, an industrial‐scale water electrolysis is demonstrated with two bifunctional catalyst electrodes...

Multi‐Step Phase Transitions of Mn3O4 During Galvanostatic Lithiation: An In Situ Transmission Electron Microscopic Investigation

A new in situ electrochemical transmission electron microscopy method is developed to investigate the multi‐step phase transitions of Mn3O4 during galvanostatic lithiation. This study provides direct evidence that the reaction pathway in a conversion reaction is strongly influenced by the charge/discharge conditions. Abstract For study of...

Nanocharacterization, Materials Modeling, and Research Integrity as Enablers of Sound Risk Assessment: Designing Responsible Nanotechnology

Potential substantial societal benefits of nanotechnology are being compromised by the fact that nanomaterials' impact on human health and the environment cannot yet be reliably assessed. Three causes for this shortcoming are described, namely, the inherent difficulty of characterizing nanomaterials, the insufficient interaction of characterization...

Probing the pH Microenvironment of Mesenchymal Stromal Cell Cultures on Additive‐Manufactured Scaffolds

A new method combining microparticles‐based pH sensors with 3D scaffolds used as a cell culture system to map stem cell physiological microenvironment is provided, which can have implications on further understanding cell activity. Here, microparticles‐based pH sensors provide acidic and basic environments in correlation to mitochondrial activity. Scale...

Unveiling Pseudocapacitive Charge Storage Behavior in FeWO4 Electrode Material by Operando X‐Ray Absorption Spectroscopy

Operando X‐ray absorption spectroscopy is used to elucidate the charge storage mechanism of FeWO4 when used as a negative electrode material in an aqueous electrochemical capacitor. Both Fe K‐edge and W L3‐edge measurements point out the involvement of the Fe3+/Fe2+ redox couple, while W6+ acts as a spectator cation, demonstrating the pseudocapacitive...

Endosomal Escape of Polymer‐Coated Silica Nanoparticles in Endothelial Cells

Smart materials have attracted significant attention due to their ability to modulate the surrounding environment. However, in the biological context, they cannot be presumed inert. A set of parameters to assess biological function following endosomal disruption and escape of polymer‐coated silica nanoparticles is provided. This analysis provides insight...

Al2O3‐Assisted Confinement Synthesis of Oxide/Carbon Hollow Composite Nanofibers and Application in Metal‐Ion Capacitors

A thin and homogeneous atomic‐layer‐deposition Al2O3 layer is applied to confine the pyrolysis of precursor fibers, which transform into metal (or metal oxide)–carbon composite hollow fibers after removal of Al2O3. The obtained freestanding hollow fibers may have a wider application than the metal‐ion capacitor that is demonstrated in this article....

Biomimicry of Cellular Motility and Communication Based on Synthetic Soft‐Architectures

Understanding cellular processes by engineering artificial counterparts that mimic structural or functional cellular aspects is of high interest. This work summarizes recent efforts in utilizing soft systems for biomimicry—following the main outline of cellular evolution, from basic compartmentalization, and biological reactions for energy production,...

Recent Advances on Self‐Supported Arrayed Bifunctional Oxygen Electrocatalysts for Flexible Solid‐State Zn–Air Batteries

Recent advances on the application of nanoarrayed bifunctional oxygen electrocatalysts as air cathodes for flexible solid‐state Zn–air batteries are reviewed. Various arrayed bifunctional oxygen electrocatalysts, including carbonaceous material arrays, transition metal compound arrays, and transition metals/carbon arrays transition metal compounds/carbon...

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