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. Author manuscript; available in PMC: 2018 Jun 13.
Published in final edited form as: Anal Methods. 2017 Jun 13;9(28):4112–4134. doi: 10.1039/C7AY00690J

Fig. 13.

Fig. 13

(a) Schemes for symmetry breaking of SAW propagation in order to generate azimuthal liquid recirculation. The left pictures shows one of the IDTs partly covered with α-gel damping material and the right picture shows the use of only one IDT with the wafer cut in a diagonal fashion. (b) Images at 60 frames/s showing the visualization of azimuthal bulk recirculation generated by asymmetric SAW propagation through dye streamlines induced by the flow. Adapted from Ref. [167] with permission of Springer.