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A new concept and devices for autonomous switching of valves and pumps in microfabricated flow channels are proposed. An electrowetting-based valve formed with a gold electrode was opened when an electrolyte solution reached a zinc electrode in a controlling flow channel. Following this, a H2O2 solution was introduced into a diaphragm micropump with manganese dioxide (MnO2) powder. Oxygen bubbles...
Autonomous control of microfluidic transport was realized using electrowetting-based valves consisting of gold and zinc areas connected each other. Other external instruments such as potentiostats were not necessary for operation. The valve region surrounded by walls of gold and poly(dimethylsiloxane) (PDMS) became hydrophilic when an electrolyte solution reached the zinc electrode. As a result, the...
A CMOS-based multisite microfluid ejection device was fabricated and demonstrated. Our aim is to fabricate the device as a chemical stimulator for neuron cells at multiple sites by the local release of chemical compounds to mimic synaptic functions artificially. An array of micro-pumps was fabricated on the CMOS chip. Microfluid ejection was performed by actuation of a deformable silicone membrane...
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