| dc.description.abstract | This study designs, simulates, fabricates, and verifies an acoustic tweezer operating at 2.4 MHz in the liquid. The acoustic tweezer is designed mainlyaccording to Fresnel Half-Wave Band (FHWB), acoustic impedance mismatch, and acoustic reflection theory. This study uses FEM software to simulate the acoustic characteristic and particle distribution of the acoustic tweezer in two-dimension,axisymmetric, and translation conditions. The simulation result firstly proves the success of FHWB Fresnel lens design, secondly indicatesthat the possibility to trap and manipulate the particle in several different conditions, and third the possibility to manipulate the particles in translation. The acoustic tweezer is fabricated with photolithography and replica molding method, then assembled with PZT-5H transducer and fabricated PDMS Fresnel lens membrane. In the experiment, the acoustic tweezer operates at 2.4 MHz sinusoidal signal with 40 Vpp in the water medium. The experiment shows that the acoustic tweezers could captures and manipulates the PVC particle with 50 μm in static, different water level, and translation as the simulation indicate. Those results could be beneficial to future development and research of acoustic tweezers. | en_US |