کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
737376 | 1461893 | 2014 | 4 صفحه PDF | دانلود رایگان |
• We demonstrate an acoustic-based method for manipulating particles using phase-shifting of surface acoustic waves.
• The location of the pressure node is adjusted simply by modulating the relative phase difference (phase-shift) between two interdigital transducers (IDTs).
• The particles trapped in the pressure node are manipulated laterally across the microfluidic channel.
• The particle displacements as a function of the phase-shift are obtained experimentally and compared with the theoretical prediction of the particle position.
An acoustic-based method for manipulating particles using phase-shifting is demonstrated. The location of the pressure node was changed simply by adjusting the phase difference (phase-shift) applied to the two interdigital transducers in the design. As a result, polystyrene particles of 5 μm diameter trapped in the pressure node were manipulated laterally across the microchannel fabricated. The lateral particle displacement from −72.5 μm to 73.1 μm along the x-direction was accomplished by varying the phase-shift with a range of −180° to 180°. In this paper, the particle displacement as a function of the phase-shift of SAW was obtained experimentally and close agreement with the theoretical prediction of the particle position was demonstrated.
Journal: Sensors and Actuators A: Physical - Volume 207, 1 March 2014, Pages 39–42