Tohru Araki

Pyrrhotite-driven early-stage terrestrial alteration in Ryugu grains

Masaaki Miyahara, Takaaki Noguchi, Toru Matsumoto, Naotaka Tomioka et autres

Samples returned from the carbonaceous asteroid Ryugu preserve a rare record of water- and organic-rich materials from the early Solar System, but this record can be modified rapidly after arrival on Earth. Here we show through controlled atmospheric exposure experiments that Ryugu …

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Langmuir–Blodgett Assembly of PM6 and N2200 Polymer Planar Heterojunctions for Interfacial Probing

Kirill K. Gubanov, Zehua Xu, Rimin Casmelin Nah, Maximilian Herm et autres

Precise control over thin-film morphology and interfacial organization is essential for solution-processed organic electronics. We demonstrate the successful Langmuir-Blodgett (LB) fabrication of nanometer-precise, uniform PM6 and N2200 polymer films. Optimized solvent and spreading conditions yield controlled assembly of uniform and homogeneous mono- …

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Sodium salts in Ryugu samples: remnants of late-stage brine in a primitive asteroid

T Matsumoto, Takaaki NOGUCHI, Akira Miyake, Yohei Igami et autres

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Hexagonal BN membranes formation by liquid-phase synthesis: Insights from scanning transmission x-ray microscopy

Carl Osby M. Mariano, Kuan‐Hung Chen, Jessie Shiue, Hayato Yuzawa et autres

Our electrochemical approach to fabricating two-dimensional flakes and creating ordered stacks of hexagonal BN (hBN) primarily enhances the synthesis flexibility and expands their applications in the aqueous phase. Using a simple cyclic voltammetry (CV) method, freestanding hBN membranes can be formed on …

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Heterostructured MnO 2 /CuO on Cu Wire for Electrochemical Energy Storage: Insights from Spectro‐Microscopy

K. Thanigai Arul, Hou‐Yi Huang, Han‐Wei Chang, Chia‐Hsiang Lee et autres

Abstract A fundamental understanding of charge storage mechanisms in bimetallic oxide heterostructures remains a key challenge in electrochemical energy storage research. In the present work, the heterostructures of manganese oxide/copper oxide (MnO 2 /CuO) are synthesized on copper wires via a facile …

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Highly Selective Toward HER or CO 2 RR by Regulating Cu Single and Dual Atoms on g‐C 3 N 4

Wan‐Ting Chen, Hung Wei Shiu, Yu‐Xun Chen, Erdembayalag Batsaikhan et autres

Abstract Designing heterogeneous electrocatalysts with high activities and product selectivity toward desired electrocatalytic reactions remains a significant challenge in mitigating reliance on fossil fuels. Here, a controllable Cu‐based electrocatalysts system on graphitic carbon nitride (g‐C 3 N 4 ), where the atomic …

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Antarctic glaciers export carbon-stabilised iron(II)-rich particles to the surface Southern Ocean

Rhiannon Jones, Jon Hawkings, Michael P. Meredith, Maeve C. Lohan et autres

Iron is an essential micronutrient for phytoplankton and plays an integral role in the marine carbon cycle. The supply and bioavailability of iron are therefore important modulators of climate over glacial-interglacial cycles. Inputs of iron from the Antarctic continental shelf alleviate iron …

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Sodium carbonates on Ryugu as evidence of highly saline water in the outer Solar System

Toru Matsumoto, T. Noguchi, Akira Miyake, Yohei Igami et autres

Sodium carbonates, chloride and sulfate have been found in samples from asteroid Ryugu. The formation of these compounds from alkaline brines through freezing or evaporation accounts for the loss of liquid water from the parent carbonaceous body.

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Scanning Transmission Soft X‐Ray Microscopy Probes Topical Drug Delivery of Rapamycin Facilitated by Microneedles

Johann Laux, Takuji Ohigashi, Marius R. Bittermann, Tohru Araki et autres

Scanning Transmission X-ray microscopy (STXM) is a sensitive and selective probe for the penetration of rapamycin which is topically applied to human skin ex vivo and is facilitated by skin treatment with microneedles puncturing the skin. Inner-shell excitation serves as a selective …

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UVSOR Synchrotron Facility 40th Anniversary

Satoshi Kera, Tohru Araki, Kiyohisa Tanaka, Y. Taira et autres

UVSOR Synchrotron Facility at Institute for Molecular Science (IMS) celebrated its 40th anniversary. This facility succeeded in emitting synchrotron radiation (SR) on November 10, 1983, eight years...

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Imaging the magnetic nanowire cross section and magnetic ordering within a suspended 3D artificial spin-ice

Edward Harding, Tohru Araki, Joseph Askey, Matthew Hunt et autres

Artificial spin-ice systems are patterned arrays of magnetic nanoislands arranged into frustrated geometries and provide insight into the physics of ordering and emergence. The majority of these systems have been realized in two-dimensions, mainly due to the ease of fabrication, but with …

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High-spatial resolution functional chemistry of nitrogen compounds in the observed UK meteorite fall Winchcombe

Christian Vollmer, Demie Kepaptsoglou, J. Leitner, Aleksander B. Mosberg et autres

Organic matter in extraterrestrial samples is a complex material that might have played an important role in the delivery of prebiotic molecules to the early Earth. We report here on the identification of nitrogen-containing compounds such as amino acids and N-heterocycles within …

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