| 研究実績の概要 |
This year, we have developed a prototype for deep sea sensing with a nanotransistor. In particular, we have demonstrated an example of application of ambient pressure-driven pumping technology towards ultra low-power underwater sensing, that can sustain 100 bars (1000 m) [2023 IEEE Underwater Technology].
This prototype is composed of a 3D printed ball connected to a microfluidic channel and mixers that enables to use ambient pressure to get the deep sea sample in real time. Several types of 3D printed technologies have been tested included resin and Peek filament. Tests have been performed in the laboratory in a dedicated high-pressure tank. This is an important achievement for the deep sea community.
In addition, we have shown that the nanotransistors can sense rare earth metal ions (La3+) with high sensitivity, showing a superNernstian response due to non-Coulombic ion-specific interactions at the nanosensor/liquid interface. The experiment has been automated. Nanotransistors have been interfaced with a nA capable measurement ability using an electronic card that we have developed. It can fit in the 3D printed ball and store the data in a SD card.
Therefore, the main goal of a demonstrating a prototype in the framework of this project is an important step for the future development of this research activity.
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