The advancing in situ XAS technique made it possible to uncover the As-nZVI reaction pathway, especially capturing transient reaction process at subsecond scale. Combining the in situ XAS experimental data with computational chemistry enabled the reaction steps to be verified, clarifying the unambiguous identification of the transit reactive intermediates. Read more »
Journal Covers
Laser-Induced Cooperative Transition in Molecular Electronic Crystal
The cooperative tuning of a supramolecular electronic crystal enables access to a long-lived hidden conducting phase with a broad temperature range. Researchers demonstrate a dynamic and cooperative phase in K-TCNQ, with the control of pulsed electromagnetic excitation. A dedicated charge–spin–lattice decoupling is required to activate and subsequently stabilize the non-equilibrium phase. Read more »
Coulombically-stabilized oxygen hole polarons enable fully reversible oxygen redox
We investigate oxygen redox in layered Na2−xMn3O7, a positive electrode material with ordered Mn vacancies. Our results establish a complete picture of redox energetics by highlighting the role of coulombic interactions across several atomic distances and suggest avenues to stabilize highly oxidized oxygen for applications in energy storage and beyond. Read more »
Functional and structural characterization of AntR, an Sb(III) responsive transcriptional repressor
Antimony is considered a priority environmental pollutant by the EPA. The ant operon of the antimony-mining bacterium, C. testosterone, confers resistance to Sb(III). The operon is regulated by the product of the first gene in the operon, antR. This is the first report of the structure and binding properties of antR, with high selectivity for environmental antimony. Read more »
Single-Domain Multiferroic Array-Addressable Terfenol-D (SMArT) Micromagnets for Programmable Single-Cell Capture and Release
Researchers develop programmable multiferroic micromotors that enable single-cell manipulation based on time-dependent functions of individual cells, such as cell secretion. Smart programmable multiferroic materials lay the groundwork for large-scale automated single-cell sorting and enable a broad spectrum of biotechnology applications. Read more »
Redirecting dynamic surface restructuring of a layered transition metal oxide catalyst for superior water oxidation
Electrocatalysts, particularly those for water oxidation, often experience substantial or at least partial reconstruction. Here, Wang et al. are able to control surface reconstruction using a cationic redox-tuning method on layered LiCoO2–xClx catalysts for the oxygen evolution reaction. The resulting optimized catalyst exhibits excellent electrocatalytic performance in alkaline electrolyte. Read more »
Gas-phase synthesis of corannulene—a molecular building block of fullerenes
Fullerenes have been implicated to play a key role in the astrochemical evolution of the interstellar medium. However, the formation mechanism of even their simplest molecular building block—corannulene—has remained elusive. Here we demonstrate that corannulene can be synthesized in the gas phase through reactions mimicking conditions in carbon-rich circumstellar envelopes. Read more »
Additive Lithography–Organic Monolayer Patterning Coupled with an Area-Selective Deposition
This scene depicts the layer-by-layer growth of an inorganic film in a selected area. The alternation of a chemical agent (blue) deposits on a gray substrate to form an inorganic film. A cross-linked organic material (tan) locally inhibits this reaction and prevents film deposition. Furthermore, the pattern-wise cross-linking of this organic film enables nanoscale pattern generation. Read more »
Chiral Spin Textures in Amorphous Iron–Germanium Thick Films
Robert Streubel and co‐workers report the formation of topological magnetization vector fields in disordered materials with local inversion symmetry breaking, harnessing high‐resolution Lorentz microscopy, quantitative x‐ray microspectroscopy, and coherent scattering. The image shows the reconstructed in‐plane magnetic induction of closely packed Bloch skyrmions embedded into helical spins. Read more »
Xylella fastidiosa causes transcriptional shifts that precede tylose formation and starch depletion in xylem
During Pierce’s disease, Xylella fastidiosa triggers transcriptional changes in grapevines and induces major physiological responses, including tylose formation and starch depletion. X-ray computed microtomography and a machine-learning algorithm were used to track the depletion of starch reserves in the xylem of a grapevine stem infected with Pierce’s disease. Read more »
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