Acoustofluidic Patterning inside Capillary Tubes Using Standing Surface Acoustic Waves

• Capillary tubes & SAW devices used to pattern particles in no-flow flowing setups Rectangular tube: particle lines are parallel tube sidewalls for all directions Circular alignment depends on their position along the height Bottom/mid height: parallel/perpendicular direction Continues flow: always flow Acoustofluidic platforms have great potentials integrate capillary controlling and manipulating microparticles biological cells both non-flowing continuous-flow settings. In order effectively manipulate microparticles/cells inside tubes, it is essential fully understand control patterns generated with different cross-sections, investigate influences of configuration arrangement electrodes tubes. This paper aims systematically patterning glass using thin film surface acoustic wave (SAW) devices. Through experimental studies numerical modelling, effects various cross-section geometries positioning respect interdigital transducers (IDTs) device a stationary fluid continuous were studied. Results showed that rectangular patterned tube's side walls, irrelevant positions IDTs, which mainly caused by standing field tube. Whereas circular quite height. At bottom tube, into direction, because waves propagate water form at middle perpendicular formed also around direction. For cases liquid flow, under agitation waves, enhances smoothens particles.