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Ueda Lab
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The lab creates new materials by stacking diamond and graphene.
AboutAbout the lab
Growing new materials from thin films
The Ueda Lab studies how to grow thin films as crystals to create materials with new functions.
Thin-film materials are widely used in optical functional films, magnetic films, and semiconductor devices, and they support today's information society.
In recent years, the lab has been stacking and combining diamond and graphene, both inorganic carbon materials, to create new functional materials.
Taking advantage of the distinctive photoconductive properties of graphene–diamond junctions, the lab is developing devices that detect and recognize images, as well as semiconductor power devices.
Key terms
- Thin film
- A very thin film, with a thickness ranging from a few atoms to a few micrometers
- Graphene
- A sheet of carbon atoms arranged in a honeycomb pattern, only one atom thick
- Power device
- A semiconductor device that handles large amounts of electric power, used for converting and controlling electricity
NewsLab news
Paper on TEM observation of the diamond/graphene interface published in Dia. Relat. Mater.
Paper on diamond bidirectional switches published in Appl. Phys. Express
Paper on high-accuracy image recognition using graphene/diamond optical memristors published in Jpn. J. Appl. Phys.
Paper on the power characteristics of field-plate diamond multi-finger FETs published in Appl. Phys. Express
Paper on diamond multi-finger FETs published in Jpn. J. Appl. Phys.
ResearchResearch themes
Using thin-film crystal growth and interface control techniques, the lab aims to develop new thin-film materials with excellent properties that could transform today's information society, in particular materials that mimic the workings of the human brain to process information with high efficiency. In recent years, the lab has been working to create new functional materials by stacking diamond and graphene to form composites.
*Illustrative imageBrain-Inspired Computing with Carbon Junctions
The lab studies devices for reservoir computing, which mimics information processing in the brain, using junctions that stack diamond and graphene, two materials that are both carbon but have different properties. The aim is to process information efficiently with little power.
*Illustrative imageDiamond Power Devices
Diamond withstands high voltages and temperatures, and it is expected to serve as a material for devices that convert electric power efficiently. The lab is surveying trends in the development of diamond power devices and the challenges ahead.
MembersFaculty
The Ueda Lab consists of faculty members, doctoral and master's students, and researchers.As of 2025
- ProfessorKenji Ueda
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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: “Graphen” AlexanderAlUS / CC BY-SA 3.0 (cropped)
- Brain-Inspired Computing with Carbon Junctions: “Diamond and graphite” User:Itub / CC BY-SA 3.0 (cropped)
- Diamond Power Devices: “Single-crystal CVD diamond disc” Matthias Schreck, Stefan Gsell, Rosaria Brescia & Martin Fischer / CC BY-SA 4.0 (cropped)
- Related lab (メーヘシュ研究室): “Flexible display” U.S. Army RDECOM / CC BY 2.0 (cropped)
- Related lab (志村研究室): “Semiconductor Wafer of Microelectronics” DrHughManning / CC BY-SA 4.0 (cropped)
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