Surface acoustic wave induced particle manipulation in a PDMS channel: principle concepts for continuous flow applications
2012 (English)In: Biomedical microdevices (Print), ISSN 1387-2176, E-ISSN 1572-8781, Vol. 14, no 2, 279-289 p.Article in journal (Refereed) Published
A device for acoustic particle manipulation in the40 MHz range for continuous-flow operation in a 50 μm wide PDMS channel has been evaluated. Unidirectionalinterdigital transducers on a Y-cut Z-propagation lithiumniobate wafer were used to excite a surface acoustic wavethat generated an acoustic standing wave inside the microfluidicchannel. It was shown that particle alignment nodeswith different inter-node spacing could be obtained,depending on device design and driving frequency. Theobserved inter-node spacing differed from the standard halfwavelengthinter-node spacing generally employed in bulkacoustic transducer excited resonant systems. This effectand the related issue of acoustic node positions relative thechannel walls, which is fundamental for most continuousflow particle manipulation operations in channels, wasevaluated in measurements and simulations. Specificapplications of particle separation and alignment wherethese systems can offer benefits relative state-of the artdesigns were identified.
Place, publisher, year, edition, pages
2012. Vol. 14, no 2, 279-289 p.
Paricle Manipulatiom, Surface Acoustic Waves, Microwaves
Other Electrical Engineering, Electronic Engineering, Information Engineering
Research subject Engineering Science with specialization in Microsystems Technology; Engineering Science with specialization in Electronics
IdentifiersURN: urn:nbn:se:uu:diva-162643DOI: 10.1007/s10544-011-9606-7ISI: 000301544500004OAI: oai:DiVA.org:uu-162643DiVA: diva2:461277
ProjectsVR, "Thin Film Guided Microacoustic Waves in Periodical Systems: Theory and Applications "
FunderSwedish Research Council, 2009-5056