Figure 3.

Characterization of microcontroller and wireless software. A) Photograph of a typical fabricated flexible bandage with bonded hollow MNAs on a PDMS-made bandage. B) A representative stress-strain curve of a peel-off test for assessment of the bonding strength of resin to PDMS. C) The bonding strength of resin and PDMS substrates (n = 6). D) Photograph of the micropump used for the drug delivery system. E) Schematic view of the microcontroller and its components. F) Example of the integrated system operation on the human body. G) Calibration plot of the micropump flow rate as a function of applied voltage (n = 3). H,I) The cumulative delivered solution using two independent pumps on a single bandage subjected to different periodic functions of applied voltage calibrated to produce a flow rate of 200 μL every 6 min for pump 1 and 400 μL every 10 min for pump 2 (n = 3 for each pump).