Riho Marumi

Development of serial X-ray fluorescence holography for radiation-sensitive protein crystals

Artoni Kevin R. Ang, Yasufumi Umena, Ayana Tomita, Naoya Shibayama et autres

X-ray fluorescence holography (XFH) is a powerful atomic resolution technique capable of directly imaging the local atomic structure around atoms of a target element within a material. Although it is theoretically possible to use XFH to study the local structures of metal …

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X-ray fluorescence holography of biological metal sites: Application to myoglobin

Ayana Tomita, Artoni Kevin R. Ang, Koji Kimura, Riho Marumi et autres

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Elucidation of local structure deformation in κ−(BEDT−TTF)2Cu[N(CN)2]Br by x-ray fluorescence holography

Artoni Kevin R. Ang, Riho Marumi, Ayana Tomita, Koji Kimura et autres

$\ensuremath{\kappa}\text{\ensuremath{-}}{(\mathrm{BEDT}\text{\ensuremath{-}}\mathrm{TTF})}_{2}\mathrm{Cu}[\mathrm{N}{(\mathrm{CN})}_{2}]\mathrm{Br} (\ensuremath{\kappa}\text{\ensuremath{-}}\mathrm{Br})$ is an organic superconductor that changes to an Anderson-type insulator due to the random defects introduced by x-ray irradiation. In this study, we directly investigated the effects of irradiation on the local structures in the anion layer of $\ensuremath{\kappa}\text{\ensuremath{-}}\mathrm{Br}$ using …

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X-ray fluorescence holography for soft matter

Artoni Kevin R. Ang, Ayana Tomita, Naoya Shibayama, Yasufumi Umena et autres

Abstract X-ray fluorescence holography (XFH) is a technique that can directly image the 3D arrangement of atoms around an element in a sample. The holograms contain both intensity and phase information, allowing atomic reconstruction without needing prior structural information or a tentative …

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