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Uchida-Toyoshima Lab
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A lab that designs transistors and sensors for the nanoscale world, starting from physics.
AboutAbout the lab
Exploring nanomaterials, innovating nanodevices
The Uchida-Toyoshima Lab studies electronic devices at the scale of nanometers, as well as sensors that use nanomaterials.
The transistors that form LSIs (integrated circuits) can no longer easily gain performance just by being made smaller.
Through both experiments and computation, the lab seeks to understand phenomena that occur in the nanoscale world, such as heat generation and quantum effects, and to provide guidelines for future device design.
The lab also works on nanoscale molecular sensors that can distinguish the components of a person's breath.
Key terms
- Transistor
- An electronic component that turns current on and off. It is the basic element that forms LSIs (integrated circuits)
- Volatile organic compounds (VOCs)
- Organic substances that evaporate easily into the air. Human breath contains many different kinds
- Quantum effects
- Behavior unique to quantum mechanics that appears when objects become very small
- Donors and acceptors
- Impurities added in very small amounts to a semiconductor. They generate electrons or holes and determine how easily current flows
NewsLab news
A doctoral student received a Young Scientist Presentation Award from the Japan Society of Applied Physics
A master's student received a Young Scientist Presentation Award from the Japan Society of Applied Physics
ResearchResearch themes
The lab aims to understand, through both experiments and computation, the physical phenomena that occur in nanoscale electronic devices such as transistors, and to provide guidelines for designing future devices. It also researches molecular sensors that use nanomaterials.
*Illustrative imageMolecular sensors that detect components of breath
A nanoscale molecular sensor that selectively detects specific volatile organic compounds (VOCs) among those contained in human breath. It may lead to diagnosing disease at a very early stage.
*Illustrative imageNanodevice design that accounts for heat generation
In miniaturized transistors, the temperature rise caused by heat generated during operation is a serious problem. By measuring and calculating temperature during operation and elucidating how heat is conducted in nano semiconductors, the lab aims at designs that take heat generation into account.
*Illustrative imagePhysics of CMOS devices
As transistors become smaller, quantum effects appear. By examining in detail how current flows under strong magnetic fields and at low temperatures, the lab derives directions toward higher-performance transistors.
*Illustrative imageQuantum effects in impurities
As transistors become even smaller, quantum-mechanical effects that could previously be ignored become important. The lab investigates how quantum-mechanical effects that appear in impurities such as donors and acceptors affect transistor characteristics.
MembersFaculty
The members of the Uchida-Toyoshima Lab consist of faculty members, postdoctoral researchers, secretarial staff, technical assistants, and doctoral, master's, and undergraduate students.As of 2026
- ProfessorUchida KenPublications ↗
- LecturerRyo ToyoshimaPublications ↗
- Assistant ProfessorMichimasa Morita
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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: “Silicon wafer close view” Le hollandais volant / CC BY 4.0 (cropped)
- Molecular sensors that detect components of breath: “Gold Nanowire Array (Abstracted)” lacomj / CC BY-SA 2.0 (cropped)
- Nanodevice design that accounts for heat generation: “CPU copper heat sink” Audrius Meskauskas, Audriusa (talk · contribs) / CC BY-SA 3.0 (cropped)
- Physics of CMOS devices: “LM340K-5.0 die” Mister rf / CC BY-SA 4.0 (cropped)
- Quantum effects in impurities: “N and p doping” Tem5psu / CC BY-SA 4.0 (cropped)
- Related lab (Nagashio Lab): “Graphen” AlexanderAlUS / CC BY-SA 3.0 (cropped)
- Related lab (Kita Lab): “SiC wafers 6inch” FDominec / CC BY-SA 4.0 (cropped)
- Related lab (Shimogaki Lab): “Multicrystalline silicon wafer with thin film iridescence” Radiotrefoil / CC BY-SA 4.0 (cropped)
- Related lab (Electron Microscopy Materials Lab): “16 Universität Wien Sternwarte Physik Gruppe Kotakoski UltraStem Titan Ian Ehm” Ian Ehm, Universität Wien / CC BY-SA 4.0 (cropped)
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