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The highlights of this article are:
• Bacillus pseudofirmus enabled calcite mineralization on 3 pure cement pastes
• Bacillus pseudofirmus enabled the complete filling of 9 mm3 holes in cement pastes in 21 days
• The bio-induced precipitation of calcite leads to the coating of bacterial cells

This work introduces an AI-based method to quantify phase fractions in steels directly from X-ray diffraction data in real time. It overcomes the limitations of traditional time-consuming analysis methods and enables fast, high-throughput experiments with real-time feedback.

The article provides an accurate characterization of the hot corrosion of the AD730 alloy in molten sulfate environments. Less severe corrosion is observed in the presence of magnesium sulfate at 700°C.

This study highlights distinct NO₂ sensing behaviors of activated carbon materials at room temperature. Contrary to the prevailing assumption, unmodified activated carbons exhibit either p-type (A Supra, PK1-3) or n-type (MSC 30, CW 30) semiconducting behavior toward the same gas. These differences are attributed to variations in surface chemical states, which govern the interaction mechanisms with NO₂.

As an alternative to the blast furnace, the current pig iron production reactor using fossil coal and coke and emitting huge CO2 amounts, we propose a novel, cleaner, direct reduction process using biomass (charcoal gasified in situ), able to cut down CO2 emissions by a factor 8.

Magnetron sputtering offers precise control over material properties, yet its potential on nanostructured substrates remains underexplored. We show that carbon nanomaterial substrates induce open microstructures that increase the active surface and enhance electrochemical performance. This scalable approach extends across multiple materials.

The original multidisciplinary approach described in this article, combining X-ray and electron diffraction, electron microscopy, and ab initio calculations, has successfully resolved the crystal structure of thin films of perovskite oxides. This work provides new insights for the vanadates and a methodology for determining precisely structural distortions for other heterostructures in general.

The Institut Jean Lamour is organizing a workshop on high-entropy alloys aimed at showcasing the breadth of research conducted at the institute on this new class of materials. In addition to presentations by IJL members, we will have the honor of welcoming Prof. Brian Cantor (University of Oxford and Brunel University) as well as Prof. Erik Lewin (Uppsala University).
The workshop will be held on February 25th at Amphitheater 200 (Campus Artem)