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Particle motion in PDMS microchannels driven by surface acoustic waves
| Content Provider | Semantic Scholar |
|---|---|
| Author | Barnkob, Rune |
| Copyright Year | 2016 |
| Abstract | This summer school presentation is based on a collaborative project set to investigate the fundamental physics of poly-dimethylsiloxane (PDMS) microchannels acoustically actuated by surface acoustic waves (SAW). Such microfluidic systems are currently, together with the entire acoustofluidics research field, receiving an increasing interest due to their use within the separation and manipulation of biological material and particles [1]. A typical SAW-driven PDMS device is shown in Fig. 1 and consists of a liquid-filled PDMS microchannel bonded to a piezoelectric lithium niobate (LiNbO3) substrate. The substrate is patterned by so-called interdigitated electrodes (IDTs), that when exposed to a harmonically oscillating electric field generate a standing SAW in the substrate below the PDMS microchannel. The standing SAW radiates into the microchannel and creates an oscillatory pressure field which leads to two second-order effects, namely an acoustic streaming as well as an acoustic radiation force acting on suspended particles. As a result, the motion of suspended particles are affected by the viscous drag from the acoustic streaming as well as the radiation force which tends to push particles towards pressure nodes and antinodes. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://pof.tnw.utwente.nl/complexmotion2016/abstracts/1-5.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
