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Yamamoto Lab
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The lab uses synchrotron X-rays to visualize electrons in materials at the nanoscale.
AboutAbout the lab
Visualizing electrons at the nanoscale with synchrotron X-rays
The lab, known as the Synchrotron Nanostructure Visualization research field, uses synchrotron X-rays to visualize the state of electrons in materials at the nanoscale.
Its goal is to establish design guidelines for developing materials with new functions.
The lab independently develops measurement technologies and analysis methods that take advantage of the properties of synchrotron X-rays, and applies them to a wide range of new functional materials, from hard materials to soft matter.
On the lab's website, the lab is introduced under the name "Takata Lab."
Key terms
- Synchrotron X-rays
- X-rays with very high brightness. In this lab, they are used for measurements that visualize the electronic structure of materials at the nanoscale
- Maximum entropy method
- An analysis technique that precisely reconstructs the distribution of electron density in a material from X-ray diffraction data
- Soft X-rays
- X-rays with wavelengths more than an order of magnitude shorter than visible light. They do not pass through materials, so dedicated optical elements and detectors are required
- Operando spectroscopy
- A measurement method that directly observes working devices and heterogeneous catalysts to study how they operate
ResearchResearch themes
The lab's goal is to use synchrotron X-rays to visualize the electronic structure of materials at the nanoscale and to establish design guidelines for developing materials with new functions. It independently develops measurement technologies and analysis methods that take advantage of the properties of synchrotron X-rays, and applies them to a wide range of new functional materials, from hard materials to soft matter. Note that the research overview on the lab's website dates from around 2022.
*Illustrative imagePromoting a next-generation synchrotron radiation facility
The lab is promoting NanoTerasu, a cutting-edge soft X-ray synchrotron radiation facility. By applying the diffraction, microscopy, and spectroscopy measurement methods and the image reconstruction analysis methods it has developed so far to the facility's light, the lab aims to advance X-ray nano-visualization technology.
*Illustrative imageX-ray visualization of electron distributions
By combining synchrotron X-ray diffraction with an analysis technique called the maximum entropy method, the lab precisely maps electron density distributions and electrostatic potentials in materials. This makes it possible to visualize interactions between atoms and between molecules.
*Illustrative imageSoft X-ray microscopy and its application to biological samples
The lab develops soft X-ray microscopes, which have a spatial resolution more than an order of magnitude higher than visible-light microscopes, together with optical elements and detectors, and applies them to biological samples. One example is the observation of the mouse cerebral cortex.
*Illustrative imageOperando spectroscopy for studying working catalysts
The lab develops soft X-ray operando spectroscopy methods that directly observe working devices and heterogeneous catalysts. Together with the Institute for Solid State Physics, The University of Tokyo, it has developed a photoelectron spectroscopy system that can measure in gas at a few Torr, and uses it to study catalytic reactions such as CO2 hydrogenation.
MembersFaculty
The members of the lab consist of faculty, administrative assistants, and undergraduate students.As of 2024
- Associate ProfessorSusumu Yamamoto
- Associate ProfessorTakeo Ejima
- Assistant ProfessorTadashi Hatano
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “Beamline-self-portrait” Warrenmck / CC BY-SA 4.0 (cropped)
- Promoting a next-generation synchrotron radiation facility: “Aust.-Synchrotron-Interior-Panorama” jjron / CC BY-SA 3.0 (cropped)
- X-ray visualization of electron distributions: “Scrutinyite crystal structure (Wyckoff 1963) polyhedra model on (001)” Ra'ike (Wikipedia) / CC0 (cropped)
- Soft X-ray microscopy and its application to biological samples: “Lab based Soft X-ray Microscope- SiriusXT” Ananya Vatsa / CC BY-SA 4.0 (cropped)
- Operando spectroscopy for studying working catalysts: “Scheme - Photoelectron photoion coincidence apparatus” Vizipaci / CC BY-SA 3.0 (cropped)
- Related lab (Okamoto Lab): “Ferromagnetic domains in spiral pattern for Fe60Al40” Magnunor / CC BY-SA 4.0 (cropped)
- Related lab (Takahashi Lab): “FZU MBE Veeco PJachimova 24” Akademie věd České republiky / Czech Academy of Sciences (Pavlína Jáchimová) / CC BY-SA 3.0 (cropped)
- Related lab (International Excellence Materials Lab): “Schéma module thermoélectrique série et parallèle” The original uploader was David Berardan at French Wikipedia. / CC BY-SA 3.0 (cropped)
- Related lab (Physical Properties and Functional Design Lab): “Athena supercomputer cluster” NASA / Public domain (cropped)
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