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A Fast and Strong Microactuator Powered by Internal Combustion of Hydrogen and Oxygenстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 15 января 2025 г.
- Авторы: Uvarov Ilia V., Shlepakov Pavel S., Svetovoy Vitaly B.
- Журнал: ADVANCED MATERIALS TECHNOLOGIES
- Том: 9
- Номер: 18
- Год издания: 2024
- Номер статьи: 2400690
- DOI: 10.1002/admt.202400690
- Аннотация: The development of fast and strong microactuators that can be integrated in microdevices is an essential challenge due to a lack of appropriate driving principles. A membrane actuator powered by internal combustion of hydrogen and oxygen in a chamber with a volume of 3.1 nanoliters is demonstrated. The combustion in such a small volume is possible only for an extremely high surface-to-volume ratio on the order of 10^7 m^−1. The fuel with this ratio is prepared electrochemically in a special regime that produces only nanobubbles. A cloud of nanobubbles merges, forming a microbubble, which explodes, increasing the volume 500× in 10 μs. The actuator generates an instantaneous force up to 0.5 N and is able to move bodies 11,000× more massive than itself. The natural response time of ≈10 ms is defined by the incubation time needed to produce an exploding bubble. The device demonstrates reliable cyclic actuation at a frequency of 1 Hz restricted by the effect of electrolyte aging. After 40,000 explosions, no significant wear in the chamber is observed. Due to a record-breaking acceleration and standard microfabrication techniques, the actuator can be used as a universal engine for various microdevices including microelectromechanical systems, microfluidics, microrobotics, wearable and implantable devices.
- Добавил в систему: Световой Виталий Борисович