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- W2752807925 abstract "Abstract Electrochemical microactuators and micropumps are too slow for many applications. The use of the alternating polarity electrolysis can strongly reduce the response time of such devices. We investigate a powerful pumping regime of a simple valveless micropump made from polydimethylsiloxane on a glass substrate. Microsecond dynamics of the gas bubbles in the chamber is monitored with fast cameras. After an incubation period of 10–100 ms a microbubble filling the entire chamber pops up in less than <?CDATA $100~mu$ ?> <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML overflow=scroll><mml:mstyle displaystyle=false><mml:mn>100</mml:mn><mml:mtext> </mml:mtext><mml:mi>μ</mml:mi></mml:mstyle></mml:math> s and disappears in 10 ms. This bubble pushes liquid out and drives the pump. The phenomenon is interpreted as an explosion of the microbubble containing a mixture of H 2 and O 2 gases. For higher amplitude of the driving pulses the incubation time can be as short as 1–2 ms but many uncorrelated microbubbles are formed in the chamber, and disappear in 1 ms. As the result a less powerful but faster pumping is possible. A few principles allowing further improve the micropump characteristics are formulated." @default.
- W2752807925 created "2017-09-15" @default.
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- W2752807925 date "2017-09-13" @default.
- W2752807925 modified "2023-10-11" @default.
- W2752807925 title "Exploding microbubbles driving a simple electrochemical micropump" @default.
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- W2752807925 doi "https://doi.org/10.1088/1361-6439/aa8914" @default.
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