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(a) SEM mage of a 3 × 3 micro-transducer array (each area 25 μm × 25 μm). (b) Electrode above each micro-transducer. (c) Human melanoma cells above a micro-transducer. (d) Schematic illustration of ultrasound-mediated quantum dots (QDs) delivery at cellular level using the micro-transducer array. (a)-(d) Reproduced with permission [187]. Copyright 2011, Elsevier.
