Abstract: A device and method for preparing a locally heterogeneous smart composite material based on time-frequency regulated SAWs are provided. The method includes: mixing functional particles, a photosensitive liquid and a photoinitiator evenly; inputting periodic time-frequency regulated sinusoidal signals defined by a frequency, a duration, an interval time and a time difference to a pair of slanted-finger interdigital transducers, such that the pair of slanted-finger interdigital transducers are excited to produce corresponding standing SAWs; coupling and allowing the standing SAWs to enter a liquid tank to form a local sound field in the photosensitive liquid; forming, by the functional particles in the photosensitive liquid, a stable array distribution under the action of an acoustic radiation force of the local sound field; and turning on an UV light source for curing, thereby completing the preparation.

Abstract: The invention discloses microparticle multi-channel time-sharing separation device and method based on an arcuate interdigital transducer. An arcuate interdigitated electrode is connected to an output channel of a signal generator. The arcuate interdigitated electrode and a polydimethylsiloxane (PDMS) microfluidic channel are placed on a lithium niobate chip. The arcuate interdigitated electrode is mainly formed by an interdigitated electrode being asymmetrically bent from a straight line into an arcuate curve. Two electrode ends of the arcuate interdigitated electrodes are asymmetrically arranged with one end big and another end small. The PDMS microfluidic channel includes a main flow channel, two inlet ends, and multiple outlet ends. The main flow channel is an approximately arcuate flow channel arranged around an outer side of the arcuate interdigitated electrode. Particles are patterned in a coverage section of surface acoustic waves to complete separation of microparticles.

Abstract: A device and method for preparing a locally heterogeneous smart composite material based on time-frequency regulated SAWs are provided. The method includes: mixing functional particles, a photosensitive liquid and a photoinitiator evenly; inputting periodic time-frequency regulated sinusoidal signals defined by a frequency, a duration, an interval time and a time difference to a pair of slanted-finger interdigital transducers, such that the pair of slanted-finger interdigital transducers are excited to produce corresponding standing SAWs; coupling and allowing the standing SAWs to enter a liquid tank to form a local sound field in the photosensitive liquid; forming, by the functional particles in the photosensitive liquid, a stable array distribution under the action of an acoustic radiation force of the local sound field; and turning on an UV light source for curing, thereby completing the preparation.

Abstract: The invention discloses microparticle multi-channel time-sharing separation device and method based on an arcuate interdigital transducer. An arcuate interdigitated electrode is connected to an output channel of a signal generator. The arcuate interdigitated electrode and a polydimethylsiloxane (PDMS) microfluidic channel are placed on a lithium niobate chip. The arcuate interdigitated electrode is mainly formed by an interdigitated electrode being asymmetrically bent from a straight line into an arcuate curve. Two electrode ends of the arcuate interdigitated electrodes are asymmetrically arranged with one end big and another end small. The PDMS microfluidic channel includes a main flow channel, two inlet ends, and multiple outlet ends. The main flow channel is an approximately arcuate flow channel arranged around an outer side of the arcuate interdigitated electrode. Particles are patterned in a coverage section of surface acoustic waves to complete separation of microparticles.