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Tochigi Lab
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A lab that uses electron microscopy to observe atoms and explore how materials gain their strength.
AboutAbout the lab
Seeing the strength of materials through the eyes of atoms.
The Tochigi Lab focuses on experiments using transmission electron microscopy to study defect structures, atomic structures, and mechanical properties of crystalline materials.
The lab builds devices that can apply force to a material inside a microscope, and investigates how materials deform while observing them at the atomic level.
The lab uses shared facilities across the university to carry out electron microscopy experiments and fabricate MEMS devices.
The lab is recruiting graduate students. Those who wish to join take the entrance examination for the Department of Mechanical Engineering, Graduate School of Engineering.
Key terms
- Transmission electron microscope
- A microscope that forms images by passing a beam of electrons through a thin specimen. It can resolve the arrangement of individual atoms.
- MEMS
- Technology that uses the fabrication processes of semiconductor manufacturing to build extremely small mechanical parts and sensors.
- Dislocation
- A region inside a crystal where the arrangement of atoms is disrupted along a line. Dislocations are involved in the deformation of materials.
ResearchResearch themes
The lab focuses on experiments using transmission electron microscopy (TEM) to investigate defect structures, atomic structures, and mechanical properties of crystalline materials. It develops systems that enable mechanical testing while observing at the atomic level, and explores the mechanisms by which materials deform.
*Illustrative imageAtomic-resolution in situ mechanical testing in TEM
The MEMS-based actuation device and control system the lab developed operate stably even during atomic-level observation in an electron microscope. Using this system, the lab investigates the mechanical behavior of crystalline materials at the atomic level.
*Illustrative imageHow deformation twins form
When force is applied to a crystal, deformation twinning can occur, producing a structure inside the crystal that mirrors itself across a plane. The lab analyzes its detailed mechanisms by combining loading tests inside a microscope, atomic-level observation, and theoretical calculations.
*Illustrative imageStructural analysis of crystal defects
Crystals contain defects such as dislocations, twins, and grain boundaries, which affect properties such as strength. The lab analyzes the fine structures of these defects at scales from the nanometer down to the atomic level.
MembersFaculty
The members of the Tochigi Lab consist of faculty, doctoral and master's students, secretaries, technical support staff, and collaborative researchers.
- Associate ProfessorEita TochigiPublications ↗
VoicesStudent voices
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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: “Ernst Ruska Electron Microscope - Deutsches Museum - Munich-edit” J Brew, uploaded on the English-speaking Wikipedia by en:User:Hat'nCoat. / CC BY-SA 3.0 (cropped)
- Atomic-resolution in situ mechanical testing in TEM: “Indentation Surface Defects Simulation” Gerolf Ziegenhain / CC BY-SA 3.0 (cropped)
- How deformation twins form: “Geminati in reticolo 2D” Gianluigi Baiardi / CC BY-SA 4.0 (cropped)
- Structural analysis of crystal defects: “Superalloy Dislocation Diagram” LostCorgi / CC BY 4.0 (cropped)
- Related lab (Furushima Lab): “EBSD orientation map of ferrous lath martensite” Tiberio / CC BY-SA 4.0 (cropped)
- Related lab (Umeno Lab): “SEM-image-showing-crack-propagation-of-TaCCNTsSiC” Qiaoyun Xie, Sylvanus N. Wosu / CC BY 4.0 (cropped)
- Related lab (Yanagimoto Lab): “Hengersor08” Original uploader was Szalax at hu.wikipedia / CC BY-SA 3.0 (cropped)
- Related lab (Advanced Machining Lab): “Centro cnc cinco ejes” Albertollopisrosa / CC BY-SA 3.0 (cropped)
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