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Nanopropulsion from internal flows. (a) Video snapshot of a self-propelled nanojet (green track) expelling a tracer NP (blue tracking trajectory). (b) Propulsion force of the nanojets calculated by eq 2, based on the velocity value in Figure 2b. (c) Tracking trajectory of the tracer NP indicates the directional motion of the tracer NP instantly pushed by the repulsion force originated from the internal flow.
