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. 2016 Jan 21;6:19574. doi: 10.1038/srep19574

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(a) Comparison of a bare hybrid sample (black circles) with a polymer-coated sample that is not electrically contacted (red squares) and a corresponding sample having a bias potential (blue triangles). (b) Multiple dosage behavior of three individual samples with the primary polymer. (c) Comparison of a multiple release system with the primary polymer (black circles) and the secondary polymer (blue triangles) (d) Magnification of the secondary polymer sample shown in (c). (e) Fluorescence imaging during subsequent release triggering.