Figure 4.

Flow-induced voltage with time. (a) Parallel alignment without herringbone grooves. (b) Perpendicular alignment without herringbone grooves. (c) Parallel alignment with herringbone grooves. (d) Perpendicular alignment with herringbone grooves.

Lee et al. Nanoscale Research Letters 2013 8:487   doi:10.1186/1556-276X-8-487
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