• Laboratory Research Domains

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  • Organic Semiconductor Materials, Devices & Circuits

    Developing new p-type and n-type organic semiconductor materials in collaboration with industry companies, fabricating and characterizing OTFT devices and circuits using synthesized inks and printing methods such as the inkjet method.
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  • Flexible and Stretchable Printed Physical Sensors

    Developing physical sensors that are printable, flexible, and highly sensitive. Objective is to realize sensors suitable for robots and healthcare by manufacturing flexible sensors and stretchable sensors that detect stress generated by pressure, bending, and tension.
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  • Flexible Hybrid Electronics

    Prototyping hybrid (FHE) sensors that are wearable and combine the flexibility of organic electronics with the high performance and functionality of Si-LSI while wirelessly transmitting sensor data.
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  • Ultra-Fine Printing Technologies

    Developing conductive inks suitable for use with reverse-offset printing, evaluating the functionality of OTFT electrodes and interconnects through printing experiments, and developing integrated circuit manufacturing processes.
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  • Development of the Metal Nanoparticle Ink

    Developing low-temperature sintered metal nanoparticle inks to improve the performance of printed TFT devices, with advanced particle designs and ink technology to reduce interconnect layer widths and the energy barrier with the semiconductor layer.
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  • Large-Area Sensor Technologies

    Developing large-area sensors that can continuously and unobtrusively measure vital signals such as heartbeat and respiration, and body movements. Thin, flexible sensors easily installable in beds, and employable in elderly care facilities or home care settings.
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  • Robotic Sensing Technologies

    Mounting flexible sensors on the robotic gripper hand, building a system linked with IoT networks to significantly improve safety and work efficiency, and create new application fields. By adding a tactile function to the grip, its gripping force can be controlled.
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New papers
News
May 11, 2022
Assistant Professor Sekine and second-year Master's program graduate student Yushi Watanabe published "Optimization of a Soft Pressure Sensor in Terms of the Molecular Weight of the Ferroelectric-Polymer Sensing Layer" in Advanced Functional Materials, and was selected for the cover picture.
Result
Apr. 01, 2021
Congratulations!Assistant Professor Wang's paper "Fully Printed PEDOT:PSS-based Temperature Sensor with High Humidity Stability for Wireless Healthcare Monitoring" is one of the Top 100 Materials Science Papers Downloaded in 2020 by Scientific Reports.
News
Mar. 21, 2023
Congratulations to a Ph.D. student, three master's students, and nine bachelor's students who have graduated from Tokito Lab.

News
On Tuesday, October 3, 2023, Naoji Matsuhisa, an Associate Professor at the Research Center for Advanced Science and Technology, University of Tokyo, delivered an online webinar on "Next-generation Interfaces Using Stretchable Electronics." This informative seminar was organized by the Tokito Laboratory and the Soft Sensing Industry-Academia Collaboration Consortium.

News
The 84th Japan Society of Applied Physics Autumn Academic Conference, held in Kumamoto from September 19th to September 21st, featured nine oral presentations and three poster presentations. For detailed research results, please refer to the conference materials.

News
The paper titled "A Flexible, 2.4-GHz Wireless Ion Sensor System Using Printed Organic Amplifiers with a 3-V Single Supply," authored by researcher Shiwaku at Tosoh Corporation, a collaborative research company, has been published in Advanced Electronic Materials, which boasts an impressive Impact Factor of 7.63.

Presentation
At the 33rd Microelectronics Symposium hosted by Daido University, an oral presentation was given by Associate Project Professor Yoshida on the "Development of an FHE Wireless Communication Sea Route using Screen Printing" (Presentation number: 8C1-2).

Presentation
At the 33rd Microelectronics Symposium hosted by Daido University, Associate Professor Sekine delivered an oral presentation titled "Development of a Soft Pressure Sensor using Layered Carbon Materials" (Presentation number: 8C1-1).

News
On Wednesday, September 6, 2023, Mr. Yukio Kobayashi, representing the Kobayashi Engineering Office, conducted an online webinar titled "Application and Development of Percolation Theory in Conductive Polymer Composites." This insightful event was organized by the Tokito Laboratory and the Soft Sensing Industry-Academia Collaboration Consortium.

Articles
Project associated professor Yoshida's technical article, "Development of a Flexible High-Sensitivity Humidity Sensor Using Cellulose Nanofibers", has been published in the Automotive Technology.

News
Professor Tokito's technical report titled "Robot System Capable of Softness Determination" was published in the Japan Robot Association's journal "Robot" (No. 273).

News
Professor Tokito's technical report titled "Robot System Capable of Softness Determination" was published in the Japan Robot Association's journal "Robot" (No. 273).

News
During the period from July 10th to 15th, Professor Tokito visited the laboratories of Professor Arias at UC Berkeley and Professor Bao at Stanford University. He delivered a lecture and engaged in discussions about research. Furthermore, they visited the research facilities of NextFlex in San Jose, a US consortium, and held discussions on FHE technology with Mr. Veres, the technical director.

News
Professor Tokito presented two research papers at the Flex Conference, which was held concurrently with SEMICON WEST from July 11th to 13th in San Francisco, USA. The topics of the presentations were "Flexible Hybrid Electronics (FHE) Sensors for Product Quality Monitoring" and "Application of Conductive Composite Layers to Various Types of Printable Sensors.”

News
2023.8.9: A shipping logistics FHE device capable of humidity and moisture management and QR code display, developed through collaborative research between Tokito Laboratory and Innolux Japan, was selected for a demonstration study aimed at "Creating a Logistics Network to Boost Japanese Sake Exports" in the Tohoku region. The decision to proceed with this project has been made.

News
In the esteemed online publication "Top Researchers" under the auspices of IGPI, Professor Tokito emphasized the transformative potential of printed electronics technology in addressing critical social challenges through the development of flexible sensors. The insightful discussion titled "Utilizing Printed Electronics Technology for Flexible Sensors: Solving Social Issues" is scheduled for delivery at 12:00 on August 8.

News
A recently published paper on stretchable accelerometers employing functional composite polymers has been authored by Professor Sekine and Mr. Ito, a master's student. The paper has been featured in Applied Materials Today, with an impressive impact factor of 10.15. You can read the full article at the following link:

Funding
Associate Professor Sekine has been selected as a TI-FRIS Fellow at the Institute for Frontier Interdisciplinary Sciences, Tohoku University.

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