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Suzuki (Ken) Lab
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A lab that uses strain as a clue to study graphene sensors and the degradation of resin–metal interfaces.
AboutAbout the lab
Exploring sensors and reliability through strain and interfaces.
Professor Ken Suzuki's lab works in mechanics of materials and mechanical engineering materials, studying the strain applied to materials and changes at the interfaces of joints.
The lab has researched designing electronic structure by combining the shape of graphene nanoribbons with internal strain, and applying it to strain sensors, gas sensors, and optical sensors.
In recent years, it has been using first-principles calculations and other methods to study how strain applied to graphene controls the adsorption behavior of gas molecules.
Currently, the lab is working to elucidate the mechanism by which the resin–metal interface in power devices peels off over long-term use.
In Tohoku University's researcher profiles, Professor Suzuki is listed as a professor at the Green Cross-Tech Research Center, Green Goals Initiative.
Key terms
- Graphene Nanoribbon
- Graphene cut into a narrow strip. Its electronic state changes depending on its shape and the strain applied to it
- Band Gap
- The range of energies that electrons cannot have, which affects how easily electricity flows. In graphene nanoribbons, it changes periodically with strain
- Power Device
- A semiconductor component used to convert and control electric power. Preventing peeling at resin–metal joints is essential to making it highly reliable
ResearchResearch themes
This lab has researched designing electronic structure by combining the shape of graphene nanoribbons with internal strain, and applying it to sensors. It is now working to elucidate the mechanism by which the resin–metal interface in power devices degrades and peels off under repeated thermal stress.
*Illustrative imageGraphene Sensors Designed with Strain
The lab studied a method to control the band gap by combining the shape of graphene nanoribbons with internal strain, thereby reducing variation in electrical conduction properties. It prototyped strain sensors, gas sensors, and optical sensors, and confirmed that strain improved gas sensor sensitivity and that photocurrent increased under simulated sunlight.
*Illustrative imageDegradation of Resin–Metal Interfaces
The lab is working on understanding the peeling of the resin–metal interface in power devices, which arises from differences in thermal expansion, as a process in which the interface changes chemically under repeated thermal stress and adhesion weakens over time. By combining experiments, X-ray measurements, and atomistic simulation, it aims to establish guidelines for material design that prevents peeling at its root.
MembersFaculty
- ProfessorKen Suzuki
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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: “Ideenwelt EM2862 - Weight sensor - Strain gauge-91926” Raimond Spekking / CC BY-SA 4.0 (cropped)
- Graphene Sensors Designed with Strain: “Strain gauge” Cristian V. / CC BY 4.0 (cropped)
- Degradation of Resin–Metal Interfaces: “Nedap ESD1 - power supply board 1 - ON Semiconductor U” Raimond Spekking / CC BY-SA 4.0 (cropped)
- Related lab (Kawai-Asada-Kawai Lab): “Summit Simulates How Humans Will “Brake” During Mars Landing” OLCF / CC BY 2.0 (cropped)
- Related lab (Sato (Y.) Lab): “Carbon Nanotube Measurements ( )” National Institute of Standards and Technology / Public domain (cropped)
- Related lab (Ogawa-Saito-He Lab): “Gas Turbine Blade” Pro-Per Energy Services / CC BY-SA 4.0 (cropped)
- Related lab (Ichikawa Lab): “CMF 56 exhaust system with plasma-sprayed thermal barrier” Ltosnar / CC BY 4.0 (cropped)
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