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. Author manuscript; available in PMC: 2019 Feb 1.
Published in final edited form as: Sens Actuators B Chem. 2017 Aug 18;255(Pt 1):638–646. doi: 10.1016/j.snb.2017.08.109

Fig. 4.

Fig. 4

The photo of the MPRE sensor and inspection of electrodes: (a) The photo of two packaged sensor on PCB; (b) The photo of the electrodes by optical microscope; (c) The SEM image of platinum electrode topography and (d) a side view of a rough spot on the electrode using FIB.