Lateral cavity acoustic transducer based microfluidic switch

A microfluidic switching device comprising:

• an upstream microfluidic channel configured to contain a liquid having particles therein;
• at least three outlet channels coupled to the upstream microfluidic channel at a junction;
• a first dead-end side channel oriented at an angle with respect to the upstream microfluidic channel and coupled to the upstream microfluidic channel at the junction, the first dead-end side channel having a gas contained therein;
• a second dead-end side channel located on an opposing side of the upstream microfluidic channel as the first dead-end side channel, the second dead-end channel oriented at an angle with respect to the upstream microfluidic channel and coupled to the upstream microfluidic channel at the junction, the second dead-end side channel having a gas contained therein;
• a transducer, wherein actuation of the transducer moves the particles laterally across the upstream microfluidic channel into one of the at least three outlet channels;
• and
• wherein the upstream microfluidic channel, the at least three outlet channels, the first dead-end side channel, and the second dead-end side channel are formed in a polydimethylsiloxane (PDMS) substrate and the PDMS substrate is bonded to a glass substrate and the transducer is acoustically coupled to the glass substrate.