Light-switchable anchors on magnetized biomorphic microcarriers

Light-switchable anchors on magnetized biomorphic microcarriers

Opel, J.; Rosenbaum, L.-C.; Brunner, J.; Staiger, A.; Zimmermanns, R.; Kellermeier, M.; Gaich, T.; Cölfen, H.; García-Ruiz, J.-M., Light-switchable anchors on magnetized biomorphic microcarriers. Journal of Materials Chemistry B 2020. Download here: https://pubs.rsc.org/-/content/articlelanding/2020/tb/c9tb02955a#!divAbstract Microcarriers with the ability to release and catch substances are highly desired metamaterials and difficult to obtain. Herein, we report a straightforward strategy to synthesize these materials by combining silica-biomorphs with mesocrystals. An easy access to microcarrier hulls with covalently bound spiropyrans…

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Mineral Vesicles and Chemical Gardens From Carbonate-Rich Alkaline Brines of Lake Magadi, Kenya

Mineral Vesicles and Chemical Gardens From Carbonate-Rich Alkaline Brines of Lake Magadi, Kenya

Melese Getenet, Juan Manuel García-Ruiz, Cristóbal Verdugo-Escamilla and Isabel Guerra-TGetenet, M.; García-Ruiz, J.M.; Verdugo-Escamilla, C.; Guerra-Tschuschke, I. Mineral Vesicles and Chemical Gardens From Carbonate-Rich Alkaline Brines of Lake Magadi, Kenya. Crystals 2020, 10, 467. Download here: https://www.mdpi.com/2073-4352/10/6/467 Mineral vesicles and chemical gardens are self-organized biomimetic structures that form via abiotic mineral precipitation. These membranous structures are known to catalyze prebiotic reactions but the extreme conditions required for their synthesis has cast doubts on their formation…

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Identifying microbial life in rocks: Insights from population morphometry

Identifying microbial life in rocks: Insights from population morphometry

Rouillard, J., García-Ruiz, J. M., Kah, L., Gérard, E., Barrier, L., Nabhan, S., … & van Zuilen, M. A. (2019). Identifying microbial life in rocks: Insights from population morphometry. Geobiology. Download here: https://onlinelibrary.wiley.com/doi/full/10.1111/gbi.12377 The identification of cellular life in the rock record is problematic, since microbial life forms, and particularly bacteria, lack sufficient morphologic complexity to be effectively distinguished from certain abiogenic features in rocks. Examples include organic pore‐fillings, hydrocarbon‐containing fluid inclusions, organic coatings on exfoliated…

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On the controls of mineral assemblages and textures in alkaline springs, Samail Ophiolite, Oman

On the controls of mineral assemblages and textures in alkaline springs, Samail Ophiolite, Oman

Giampouras, M., Garrido, C. J., Bach, W., Los, C., Fussmann, D., Monien, P., & García-Ruiz, J. M. (2020). On the controls of mineral assemblages and textures in alkaline springs, Samail Ophiolite, Oman. Chemical Geology, 533, 119435. Download here: https://reader.elsevier.com/reader/sd/pii/S0009254119305649?token=FACA37743A2F972AE2B911F77A8DCCDEACF06A0C63789FD0DBD05292BFA1840E2464C5ECD037CC97ADD42D8E8A33CEDC Interactions between meteoric water and ultramafic rocks in the Oman Ophiolite generate waters of variable physicochemical characteristics. The discharge of these waters forms complex alkaline pool networks, in which mineral precipitation is triggered by mixing, evaporation, and uptake…

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Geochemistry and mineralogy of serpentinization-driven hyperalkaline springs in the Ronda peridotites

Geochemistry and mineralogy of serpentinization-driven hyperalkaline springs in the Ronda peridotites

Giampouras, M., Garrido, C. J., Zwicker, J., Vadillo, I., Smrzka, D., Bach, W., … & García-Ruiz, J. M. (2019). Geochemistry and mineralogy of serpentinization-driven hyperalkaline springs in the Ronda peridotites. Lithos, 350, 105215. Download here: https://reader.elsevier.com/reader/sd/pii/S0024493719303743?token=F0784FC81F5A036EDA8C552FF36661EC672B7D471A5884AAF2A4DC869AEB9BAD907638B73D29C64A5FA0E30461D5CCD4 We present a detailed study of the water geochemistry, mineralogy and textures in serpentinization-related hyperalkaline springs in the Ronda peridotites. Ronda waters can be classified into hyperalkaline fluids and river waters that are broadly similar to Ca2+–OH– and Mg2+–HCO3– water types described in…

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A Polyextreme Hydrothermal System Controlled by Iron: The Case of Dallol at the Afar Triangle

A Polyextreme Hydrothermal System Controlled by Iron: The Case of Dallol at the Afar Triangle

Kotopoulou, E., Delgado Huertas, A., Garcia-Ruiz, J. M., Dominguez-Vera, J. M., Lopez-Garcia, J. M., Guerra-Tschuschke, I., & Rull, F. (2018). A Polyextreme hydrothermal system controlled by iron: the case of Dallol at the Afar triangle. ACS Earth and Space Chemistry, 3(1), 90-99. Download here: https://pubs.acs.org/doi/pdf/10.1021/acsearthspacechem.8b00141 One of the latest volcanic features of the Erta Ale range at the Afar Triangle (NE Ethiopia) has created a polyextreme hydrothermal system located at the Danakil depression on top of a…

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Symbiosis of Silica Biomorphs and Magnetite Mesocrystals

Symbiosis of Silica Biomorphs and Magnetite Mesocrystals

Opel, J., Brunner, J., Zimmermanns, R., Steegmans, T., Sturm, E., Kellermeier, M., … & García‐Ruiz, J. M. (2019). Symbiosis of Silica Biomorphs and Magnetite Mesocrystals. Advanced Functional Materials, 29(37), 1902047. Download here: https://onlinelibrary.wiley.com/doi/epdf/10.1002/adfm.201902047 Silica biomorphs are extraordinary inorganic superstructures formed via autocatalytic co‐precipitation and bottom‐up self‐assembly of alkaline‐earth carbonates and silica. However, they show no inherent functionality except for their striking textural motifs and curved morphologies. This work presents strategies to magnetize silica biomorphs, thus creating thermally…

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Hybrid Biomimetic Materials from Silica/Carbonate Biomorphs

Hybrid Biomimetic Materials from Silica/Carbonate Biomorphs

Opel, J., Unglaube, N., Wörner, M., Kellermeier, M., Cölfen, H., & García-Ruiz, J. M. (2019). Hybrid biomimetic materials from silica/carbonate biomorphs. Crystals, 9(3), 157. Download here: https://www.mdpi.com/2073-4352/9/3/157 The formation of a polymer protection layer around fragile mineral architectures ensures that structures stay intact even after treatments that would normally destroy them going along with a total loss of textural information. Here we present a strategy to preserve the shape of silica-carbonate biomorphs with polymers. This method converts…

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A Universal Geochemical Scenario for Formamide Condensation and Prebiotic Chemistry

A Universal Geochemical Scenario for Formamide Condensation and Prebiotic Chemistry

Saladino, R., Di Mauro, E., & García‐Ruiz, J. M. (2019). A Universal Geochemical Scenario for Formamide Condensation and Prebiotic Chemistry. Chemistry–A European Journal, 25(13), 3181-3189. Download here: https://chemistry-europe.onlinelibrary.wiley.com/doi/epdf/10.1002/chem.201803889 The condensation of formamide has been shown to be a robust chemical pathway affording molecules necessary for the origin of life. It has been experimentally demonstrated that condensation reactions of formamide are catalyzed by a number of minerals, including silicates, phosphates, sulfides, zirconia, and borates, and by cosmic dusts…

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Thermal assisted self-organization of calcium carbonate

Thermal assisted self-organization of calcium carbonate

Zhang, G., Verdugo-Escamilla, C., Choquesillo-Lazarte, D., & García-Ruiz, J. M. (2018). Thermal assisted self-organization of calcium carbonate. Nature communications, 9(1), 1-7. Download here: https://www.nature.com/articles/s41467-018-07658-0.pdf Fabrication of mineral multi-textured architectures by self-organization is a formidable challenge for engineering. Current approaches follow a biomimetic route for hybrid materials based on the coupling of carbonate and organic compounds. We explore here the chemical coupling of silica and carbonate, leading to fabrication of inorganic–inorganic biomimetic structures known as silica-carbonate biomorphs. So…

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